OPERATOR MANUALsg24 grinder form gom3259601, version 1.2, authorization: dvr, page: 6 surface...

OPERATOR MANUALIncludes Safety, Service and Replacement Part Information

Model SG24Series Surface Grinder

Form: GOM3259601Version 1.2

Do not discard this manual. Before operation, read andcomprehend its contents. Keep it readily available for reference

during operation or when performing any service relatedfunction. When ordering replacement parts, please supply thefollowing information: model number, serial number and part

number. For customer service assistance, telephone800.533.0524, +507.451.5510. Our Customer Service Department

telefax number is 877.344.4375 (DIGGER 5), +507.451.5511.There is no charge for customer service activities .

Internet address: http://www.generalequip.com.E-Mail location: [email protected].

Copyright 2003, General Equipment Company.

Manufacturers of light construction equipment

620 Alexander Drive SW • P.O. Box 334 • Owatonna, Minnesota 55060-0334 USATelephone: 800.533.0524 • International Telephone: +507.451.5510

Telefax: +507.451.5511 • Sales/Customer Service Department Toll Free: 877.344.4375 (DIGGER 5)http://www.generalequip.com • e-mail: [email protected]

Congratulations on your decision to purchase a General light construction product. From ourhumble beginnings in 1955, it has been a continuing objective of General Equipment Company tomanufacture equipment that delivers uncompromising value, service life and investment return.Because of this continuous commitment for excellence, many products bearing the General nameactually set the standards by which competitive products are judged.

When you purchased this product, you also gained access to a team of dedicated andknowledgeable support personnel that stand willing and ready to provide field supportassistance. Our team of sales representatives and in house factory personnel are available toensure that each General product delivers the intended performance, value and investment return.Our personnel can readily answer your concerns or questions regarding proper applications,service requirements and warranty related problems.

General Equipment Company places great emphasis upon not only product performance, but alsoon product safety. It is important to remember that this product will only be as safe as the operatorswhich utilize it. It just makes good, common sense to take the time to read and fully understand thecontents of this manual before attempting to utilize this product in service. If you ever do have anyquestions or concerns about this product, please feel free to contact our Customer ServiceDepartment at the telephone numbers listed below for assistance.

If there is anything that I can do to assist your efforts when utilizing this product, please do nothesitate to contact me. For assistance after normal business hours, telephone me at 507.451.9409or 507.363.1033. If I am not immediately available, I will attempt to return your call as soon aspossible.

Sincerely,

GENERAL EQUIPMENT COMPANY

Dennis Von RudenPresident

DESCRIPTION PAGE

Notice to Operators

Operational Instructional Data Sheet

Safety PrecautionsPreparation.Operation.Maintenance, Repair and Storage.

AssemblyRemoving the Surface Grinder From the Pallet.Installing the SG24-1000 Safety and Dust Shield Assembly Kit.

Before Starting the EngineFilling the Engine Crankcase with Oil.Filling the SG24/G Series Engine Fuel Tank.Filling the SG24/GHP Propane Cylinder.

OperationTheory of OperationMulti-Accessory Attachments and Applications.Installing a Multi-Accessory Attachment (not including multi-segmented,dry diamond discs) in the Counterrotating Discs.Removing a Multi-Accessory Attachment (not including multi-segmented,dry diamond discs) from the counterrotating discs.Transporting the Surface Grinder.Adjusting the Operator Handle Height.Starting the SG24/E Series Electrically Powered Surface Grinder on theJob Site .Starting the SG24/G Series Gaasoline Powered Surface Grinder on the JobSite.Procedures for the Safe handling of Propane.Example of a Propane Emergency Plan.Starting the SG24/GHP Propane Converted Surface Grinder on the JobSite.Counteracting the Propane Refrigeration Effect.Operating the Surface Grinder on the Job Site.Stopping the SG24/E Series Electrically Powered Surface Grinder.Stopping the SG24/G Series Gasoline Powered Surface Grinder.

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SG24 GRINDER FORM GOM3259601, VERSION 1.2, AUTHORIZATION: DVR, PAGE: 2

DESCRIPTION PAGE

Stopping the SG24/GHP Propane Converted Surface GrinderOperational Parameters and Techniques for the SG24 Series SurfaceGrinder.

ServicePreventative Maintenance Check List.Checking V-Belt Tension and Alignment.Installing a Replacement V-Belt, Centrifugal Clutch or Pully.Replacing the Lord® Type Elastomeric Mounts on the Multi-AccessoryDiscs.Lubrication Requirements.Electric Motor Service.Engine Service.

TroubleshootingElectric Motor.Engine.Operational Problems.

Storage

Specifications

Replacement Parts Diagrams

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Notice to OperatorsIF YOU CAN NOT READ OR DO NOT FULLY UNDERSTAND THE CONTENTS OF THISMANUAL, PLEASE CONTACT THE FACTORY FOR PROPER ASSISTANCE BEFOREATTEMPTING TO OPERATE THIS PRODUCT.

SI TU NO PUEDES LE'ER O NO COMPRENDES EL CONTENIDO DE ESTE MANUALFAVOR DE PONERSE EN CONTACTO CON LA. FABRICA PARA ASSISTENCIA- APROPIA ANTES DE INTENTAR PARA OPERAR ESTE PRODUCTO.

SOLLTEN SIE DIESE GEBRAUCHSANWEISUNG NICHT LESEN KOENNEN ODER ESNICHT VOLLKOMMEN VERSTEHEN, WENDEN SIE SICH BITTE AN DEN HERSTELLERFUER RICHTIGE HILFE EHE SIE VERSUCHEN DIESES PRODUKT ZU OPERIEREN.

SI VOUS NE LISEZ OU NE COMPRENDRE ENTIEREMENT LES MATIERES DE CEMANUEL, S'IL VOUS PLAIT, CONTACTEZ L'USINE POUR L'ASSISTANCEAPPROPRIEE AVANT D'UTILISER LE PRODUIT.

These safety alert symbols identify important safety messages in this manual. When you see these symbols,be alert to the possibility of personal injury and carefully read the message that follows.

Do not allow anyone to operate the Surface Grinder without first reading this Operator's Manual andbecoming familiar with its operation. The manufacturer of this Surface Grinder has gone to great extremesto provide the owner(s) and/or operator(s) with the finest equipment available for its intended job function ofproviding a variety of industry recognized surface preparation functions on horizontal floor surfaces. Yet, thepossibility exists that the Surface Grinder can be utilized in and/or subjected to job applications notperceived and/or anticipated by the manufacturer. Such misuse and/or misapplication of the Surface Grindercan lead to the possibility of serious damage, injury or even death. It is the responsibility of the owner(s)and/or operator(s) to determine that the Surface Grinder is being utilized and/or operated within the scopeof its intended job function. It is the responsibility of the owner(s) and/or operator(s) to establish, monitorand constantly upgrade all safety programs and/or practices utilized in and for the operation of the SurfaceGrinder. The purpose of such programs is to provide for owner(s') and/or operator(s') safety. Operators mustbe instructed to recognize and avoid unsafe conditions associated with their work (29 CFR 1926.21 (b)(2))and/or applicable updated revisions. It is the responsibility of the owner(s) and/or operator(s) to determinethat no modifications and/or alterations have been made to the Surface Grinder. Modifications and/oralterations can lead to the possibility of serious damage, injury or even death. It is the responsibility of theowner(s) and/or operator(s) to make this Operator's Manual available for consultation during all phases ofoperation. Refer to OSHA 2207 and/or applicable updated revisions which contains all OSHA job safety andhealth rules and regulations (1926 and 1910) covering construction.

The concept of powered Surface Grinder has been successfully utilized for many years as a practicalsolution to many types of surface preparation requirements. The basic concept is proven and well acceptedwithin the associated marketplace. Use of a Surface Grinder requires strenuous work activity. This type ofwork activity can be considered to be greater in magnitude than that experienced with the use of many othertypes of both light construction and lawn and garden related equipment. This type of work activity shouldonly be attempted by operators of adequate physical size and stature, mental awareness and physical



strength and condition. The body parts most noticeably affected during any specific process are the arms,hands, wrists, shoulders, lower back and legs. The process can also produce excessive stress/strain directlyto the back muscles, spinal vertebrae and many other body parts. Back related pain can be a side effect ofutilizing a Surface Grinder. An operator with a chronic back related problem or a history of back and/or othermedically related problems should not attempt to utilize the Surface Grinder. Use of the Surface Grinder mayonly aggravate this and any other medically related problem. Because of the diverse type of prevailing jobapplications, job site conditions, operator experience levels and operator physical characteristics, nowarranty, guarantee, representation and/or liability is made by the manufacturer as to the absolutecorrectness or sufficiency of any operational procedure, operational position and/or technique. There is noabsolute guarantee that an operator of any given experience level, physical size and/or physical conditionwill be immune to the possibility of and/or probable physical side effects of the normal use of the SurfaceGrinder. Each potential operator must be made aware of and assume the operational and physical liabilitydescribed and/or associated with the use of the Surface Grinder. Improper use of the Surface Grinder canresult in property damage and/or personal injury, including death. Each potential operator not willing toassume the operational and physical liability described and/or associated with the use of the SurfaceGrinder, should not operate it. Proper levels of operator experience, skill and common sense are essentialfor maximizing the safe and efficient operation of the Surface Grinder.

Record the Surface Grinder and engine/electric motor serial numbers in the spaces provided below.

_______________ Model Number

_______________ Serial Number

_______________ Engine/Electric Motor Serial Number

_______________ Date of Purchase

Specifications and design are subject to change without notice or obligation. All specifications are generalin nature and are not intended for specific application purposes. General Equipment Company reservesthe right to make changes in design, engineering or specifications and to add improvements or discontinuemanufacture at any time without notice or obligation. General Equipment Company and its agents accept noresponsibility for variations which may be evident in actual products, specifications, pictures anddescriptions contained in this publication.

Operator Instructional Data SheetThe following undersigned operators of the Surface Grinder described and/or pertaining to this Operator'sManual have received formal safety and operational information/instruction from the undersignedowner(s)/instructor(s) in accordance to OSHA 29 CFR 1926.21 (b)(2) and/or applicable updated revisionspertaining to, but not necessarily limited to the:

1) READING, COMPREHENSION AND ACKNOWLEDGEMENT OF THE MATERIAL COMPRISING THEENTIRE CONTENTS OF THE APPLICABLE OPERATOR'S MANUAL AND SAFETY AND OPERATIONALINFORMATION VIDEO TAPE FOR THE SURFACE GRINDER.

2) FORMALIZED OPERATOR'S SAFETY PROGRAM TO BE DEVISED BY THE OWNER OF THE


SURFACE GRINDER IN CONJUNCTION WITH THE CONTENTS OF THE APPLICABLE OPERATOR'SMANUAL, SAFETY AND OPERATIONAL INFORMATION VIDEO TAPE FOR THE SURFACE GRINDERAND THE APPLICABLE MATERIAL INCLUDED IN THE NATIONAL ELECTRIC CODE®.

3) OSHA AND NATIONAL ELECTRIC CODE® RULES AND REGULATIONS RESEARCHED FORAND/OR BY THE OWNER OF THE SURFACE GRINDER AND DEEMED APPLICABLE TO THE SAFEAND PROPER USE AND/OR OPERATION OF THE SURFACE GRINDER FOR ANY SPECIFIC JOBAPPLICATION.

4) LOCAL LAWS, REGULATIONS AND CUSTOMS RESEARCHED FOR AND/OR BY THE OWNER OFTHE SURFACE GRINDER AND DEEMED APPLICABLE TO THE SAFE AND PROPER USE AND/OROPERATION OF THE SURFACE GRINDER FOR ANY SPECIFIC JOB APPLICATION.

5) FORMALIZED MAINTENANCE PROGRAM FOR THE SURFACE GRINDER TO BE DEVISED BY THEOWNER OF THE SURFACE GRINDER IN ACCORDANCE WITH, BUT NOT NECESSARILY LIMITED TO,THE SPECIFICATIONS, GUIDELINES AND OPERATIONAL INFORMATION CONTAINED IN THEAPPLICABLE OPERATOR'S MANUAL.

6) COMPREHENSIVE OPERATIONAL INSTRUCTIONS FOR THE CORRECT AND PROPER USE OF THESURFACE GRINDER AS PER THE CONTENTS OF THE APPLICABLE OPERATOR'S MANUAL, SAFETYAND OPERATIONAL INFORMATION VIDEO TAPE AND APPLICABLE MATERIAL INCLUDED IN THENATIONAL ELECTRIC CODE®.

_______________ Operator _______________ Owner/Instructor __________ Date






NOTE: INSERT COPIES OF THIS PAGE WITHIN THE OPERATOR'S MANUAL IF SPACE FORADDITIONAL OPERATORS IS REQUIRED.

Safety Precautions

THE FOLLOWING SAFETY PRECAUTIONSPROVIDE SOME COMMON SENSE GUIDES TOPROMOTE SAFETY AND EFFICIENCY WITH THESURFACE GRINDER. NO WARRANTY, GUARANTEEOR REPRESENTATION IS MADE BY THEMANUFACTURER AS TO THE ABSOLUTECORRECTNESS OR SUFFICIENCY OF ANYINFORMATION OR STATEMENT. THESE SAFETYPRECAUTIONS ARE INTENDED TO DEALPRINCIPALLY WITH COMMON PRACTICES ANDCONDITIONS ENCOUNTERED IN THE USE OF THESURFACE GRINDER AND ARE NOT INTENDED TOBE ALL INCLUSIVE. PROPER LEVELS OFOPERATOR EXPERIENCE, SKILL AND COMMONSENSE ARE ESSENTIAL FOR SAFE ANDEFFICIENT OPERATION.

THE ENGINE EXHAUST FROM THIS PRODUCTCONTAINS CHEMICALS KNOWN TO THE STATE OFCALIFORNIA TO CAUSE CANCER, BIRTHDEFECTS OR OTHER REPRODUCTIVE HARM.THIS STATEMENT IS MADE IN COMPLIANCE TOCALIFORNIA PROPOSITION 65.

INCORRECT USE OF THE SURFACE GRINDERCAN RESULT IN PROPERTY DAMAGE, PERSONALINJURY OR EVEN DEATH. TO REDUCE THISPOSSIBILITY, GIVE COMPLETE AND UNDIVIDEDATTENTION TO THE JOB AT HAND AND FOLLOWTHESE SAFETY PRECAUTIONS:

PREPARATION.

1) This Surface Grinder is a specialized type ofpowered equipment, designed for a specific jobfunction and requires adequate and thoroughinstruction BEFORE it is operated. The size, power,complexity and operating characteristics of this type ofpowered equipment would dictate that each operator

must receive adequate, professional instructionregarding the proper operation of this Surface Grinderbefore being allowed to utilize it. BEFORE attemptingto utilize this Surface Grinder, read this Operator'sManual, the applicable Safety and OperatingInformation Video Tape and the material supplied bythe engine manufacturer to familiarize each operatorwith its correct operating procedures. Avoid the urgenot to take the necessary time to read this Operator'sManual before operating the Surface Grinder. DO NOTOPERATE THE SURFACE GRINDER UNTIL EACHOPERATOR COMPLETELY COMPREHENDS THECONTENTS OF THIS MANUAL AND THEAPPLICABLE SAFETY AND OPERATIONALINFORMATION VIDEO TAPE.

2) Develop a comprehensive program for the safeoperation of the Surface Grinder by its owner(s) and/oroperator(s). Such a program will include, but is notlimited to: instructional requirements for operation,applicable OSHA requirements, local laws andregulations, job site safety and a Surface Grindermaintenance program. Constantly examine andupgrade this program to guarantee owner(s) and/oroperator(s) safety. Each operator must be fullyinstructed regarding the specifics of this safetyprogram.

3) Determine that the Surface Grinder is in its original,factory configuration and has not been modified in anymanner. Many modifications can result in potentiallydangerous configurations that can lead to propertydamage and/or personal injury. If there are anyquestions about possible modifications made to theSurface Grinder, contact the Customer ServiceDepartment for specific information BEFOREutilization. There is no charge for this service. Do notoperate the Surface Grinder without the use of theoriginal equipment V-belt guard. Use of the SurfaceGrinder without an approved belt guard can lead toproperty damage and/or personal injury.

4) Minors should never be allowed to operate theSurface Grinder. Bystanders, especially children andanimals, should not be allowed in the area where theSurface Grinder is in use. The grinding process canresult in flying particles being emitted at high velocityand striking the operator and/or onlookers. This canlead to the possibility of property damage and/orpersonal injury. Keep all body parts, loose clothing,foreign objects and onlookers clear of the rotatingdiscs, multi-accessory attachments and flyingparticles.


5) Operators must be in adequate physical condition,mental health and not under the influence of anysubstance (drugs, alcohol, etc.) which might impairvision, dexterity or judgment. Working with the SurfaceGrinder is strenuous. If you have any condition thatmight be aggravated by strenuous work, check withyour doctor BEFORE operating the Surface Grinder.Guard against the possibility of back related injuries.Always lift the Surface Grinder with leg muscles andnot with the back.

6) Prolonged use of the Surface Grinder (or other,similar machines) exposes the operator to vibrationswhich may produce Whitefinger Disease (Raynaud'sPhenomenon). This phenomenon reduces the hand'sability to feel and regulate temperature, producesnumbness and burning sensations and may causenerve and circulation damage and tissue necrosis.Antivibration systems do not guarantee that you will notsustain Whitefinger Disease. Therefore, continuousand regular users should closely monitor the conditionof their hands and fingers. After each period of use,exercise to restore normal blood circulation. If any ofthe symptoms appear, seek medical adviceimmediately.

7) Clothing must be sturdy and snug fitting, but allowcomplete freedom of movement. Never wear loosefitting jackets, scarves, neckties, jewelry, flared orcuffed pants or anything that could become caught oncontrols or moving parts. Wear long pants to protectyour legs. Protect your hands with heavy duty, nonslipgloves to improve your grip. Good footing is mostimportant when operating the Surface Grinder. Wearsturdy boots with nonslip soles. Steel-toed safetyshoes are highly recommended. Never wear tennisshoes or other, similar type shoes which afford little orno protection. Wear an approved safety hard hat toprotect the operator'(s') head(s) where there is adanger of head injuries. Noise, generated by theengine of the Surface Grinder and the actual processitself, can damage your hearing. Wear approved soundbarriers (ear plugs or ear mufflers) to protect yourhearing. Continuous and regular operators should havetheir hearing checked regularly.

8) Visually inspect the Surface Grinder, components,tools and accessories for damaged or worn parts.BEFORE each use:

a) Disconnect the engine spark plug wire or powersource cable.

b) Clean and remove all accumulated foreign matter

from the wheels and determine that each rotates freely.c) Clean and remove all accumulated foreign matterfrom inside the main frame area.

d) Inspect the V-belt drive for proper tension, wear andgeneral condition. Replace each component asnecessary.

e) Inspect the multi-accessory discs and gimbal headassemblies for excessive wear and structural integrity.Replace each component as necessary. The multi-accessory discs rotating at high speed during thespecific process can be subject to high wear rates if theinstalled attachment is not properly maintained and/orreplaced at regular service intervals.

f) Determine that operator controls work freely, allsafety devices are operative and information decals arereadable.

g) Check to see that the Surface Grinder and all relatedaccessories are in good, mechanical conditionBEFORE utilization.

h) Reconnect the spark plug wire or power sourcecable as applicable.

9) Contact appropriate representatives to determineif/where electrical cables, gas lines and otherhazardous items are buried under the work surfaceBEFORE utilization. The Surface Grinder and relatedaccessories are not insulated. Contact with buriedelectrical cables, gas lines and other hazardous itemscan result in electrocution and/or an explosion.

10) Know how the controls operate. Know how to stopthe engine or electrical motor quickly in an emergency.Always start the engine or electric motor according tothe instructions as outlined in this manual to minimizethe possibility of unexpected contact with the worksurface. Unexpected contact with the work surface cancause loss of machine control, and the possibility ofproperty damage and/or personal injury.

11) Ground the SG24/E electrically powered SurfaceGrinder motor securely. Determine that any"grounding" wire and/or device is, in fact, properlygrounding the motor. Failure to properly ground themotor may cause an electrical shock and/orelectrocution, resulting in property damage andpersonal injury including death. Electrical wiring and allconnections should be performed by a qualifiedelectrician. Depending upon the wiring configuration,the electric motor is designed to operate from either115 or 230 volt, AC power sources. Determine that the


electric motor voltage switch is properly selectedaccording to the intended and/or available powersource. Operating the electric motor from an impropervoltage/amperage power source can result in propertydamage and/or personal injury.

12) When operating the SG24/E electrically poweredSurface Grinder on a surface containing water or otherelectrically conducting liquid, special precautions mustbe taken to minimize the possibility of operatorelectrocution. One such precaution is to wire andoperate the electric motor from a clean, 20 Ampere,115 Volt AC power source in conjunction with a groundfault circuit interrupter (GFCI). A GFCI is a safetydevice that disconnects power from a circuit to a loadwhen a potentially dangerous condition occurs. TheGFCI opens the circuit when the fault current flow froma power line to a ground exceeds the safe limit forhumans. The GFCI protects against harmful electricalshock to a person caused by contact with a defectiveelectrical product. A GFCI differs from a fuse or circuitbreaker. A fuse or circuit breaker opens the circuitwhen the total current flow in the power line exceedsthe safe limit of the power line. They are designed toprotect against fire caused by overheating of the powerline. Use of a GFCI gives on the job protection fromelectrical shock hazards caused by ground faults incommercial, industrial and residential applications.They are simple and easy to use: plug a portable GFCIinto any suitable, grounded extension cord and plugthe Surface Grinder into the GFCI for automaticprotection against ground faults. For specificinformation, consult current National Electrical Code®publications and OSHA publications 210-22D (orcurrent revision) for construction sites and 555-3 (orcurrent revision) for use around any area containingwater.

13) Never exceed the recommended capacities of theSurface Grinder. Refer to the Specifications section ofthis manual for more detailed information.

OPERATION.

1) Give complete and undivided attention to the job athand. Do not chew gum, smoke and/or use smokelesstobacco while utilizing the Surface Grinder. Do notattempt to eat and/or drink while utilizing the SurfaceGrinder. Determine that eyeglasses and/or hearing aiddevices are properly secured.

Use of the Surface Grinder is strenuous and causesfatigue. Help prevent the cause of an accident. Plan totake work breaks as required to help maintain proper

mental and physical alertness.2) This Surface Grinder is not sealed or insulated. Donot operate this machine in an explosive atmosphereor near combustible materials. Refer to current OSHAand National Electric Code® rules and regulations.

3) Gasoline is an extremely flammable fuel. Useextreme caution when handling gasoline or mixing fuel.Always utilize UL® and/or CSA® approved containersfor the storage and transportation of fuel. Do not smokeor bring fire or flame near the fuel. Always shut off theengine and allow it to cool before refueling. Neverremove the fuel tank filler cap while the engine isrunning. Never operate an engine without a fuel tankfiller cap. Select bare ground for fueling and move atleast 10 feet from the fueling spot before starting theengine. Wipe off any spilled fuel before starting theengine and check for leakage. If a fuel or oil leak isfound, do not start or run the engine until the leak isfixed and the spillage has been wiped away. Take carenot to get fuel or oil on your clothing. If this happens,change your clothing immediately. Before operating theSurface Grinder, refer to the Specifications section ofthis manual for more detailed information regardingfuel and lubrication requirements.

4) The Surface Grinder is designed for use by oneoperator. Use of the Surface Grinder by more than oneoperator can lead to confusion and loss of control,resulting in property damage and/or personal injury. Ifit is felt that more than one person is required tooperate the Surface Grinder, STOP and contact theCustomer Service Department for specific operationaland service/maintenance information. There is nocharge for this service.

5) Do not operate the Surface Grinder with onlookersclose by. Caution all onlookers to stand clear. Thegrinding process can result in flying particles beingemitted at high velocity and striking the operator and/oronlookers This can lead to the possibility of propertydamage and/or personal injury. Keep all body parts,loose clothing and foreign objects clear of the rotatingdrum and flails.

6) Start the engine or electric motor according to theinstructions as outlined in this manual to minimize thepossibility of unexpected contact with the work surface.Unexpected contact with the work surface can causethe loss of machine control and the possibility ofproperty damage and/or personal injury.

7) Start and operate the Surface Grinder only in a wellventilated area. Carbon Monoxide fumes given off by


an engine are poisonous. Breathing these fumes canresult in property damage and/or personal injury.Operate the Surface Grinder only when/where visibilityand light are adequate for the job at hand. Workcarefully. Always hold the operator handle firmly withboth hands. Wrap your fingers around the handle,keeping it cradled between your thumbs and fingers.Always make sure the operator handle is in goodcondition and free of moisture, pitch, oil or grease.Wear gloves to improve your grip. Never leave theSurface Grinder running unattended.

8) Special care must be exercised on slipperyconditions and on difficult, uneven surfaces. Watch forcracks, high spots and other, surface irregularities.Keep proper footing and balance at all times. Thenormal use of this machine is on level surfaces. Otherterrains can be dangerous and should be avoided. Onlyproperly trained operators should attempt thesetechniques.

9) Never start the engine or electric motor with theSurface Grinder directly over cracked, uneven orirregular surfaces. Start the engine or electric motoraccording to the instructions as outlined in this manual.

10) Contact with a hot, engine muffler can causeproperty damage and/or personal injury. Remain clearof a hot, engine muffler. Do not over speed the engineby altering the governor setting or by disconnecting theengine governor. Serious damage to the engine and/orpersonal injury can result.

11) Clean and remove all accumulated foreign matterfrom inside the main frame area after each use. Thispractice will maximize bearing and V-belt service life.

12) Because this Surface Grinder is classified as a lowcost, hand held, low horsepower, portable typemachine, it is limited in the number of practical and/orsuitable job applications. A particular job site, actualsurface conditions, job specifications and operatorskill/common sense may dictate that a different type ofmachine (with characteristics of higher purchase cost,being mounted to a carrier vehicle, with greaterhorsepower and less mobility), method and/or processbe utilized to properly complete the job with the degreeof efficiency and safety required. Contact the CustomerService Department for specific information regardingsuitable job applications, job sites surface conditionsand operator experience/skill/common senserecommendations for this Surface Grinder BEFOREutilization. There is no charge for this service.

MAINTENANCE, REPAIR AND STORAGE.

1) Use only genuine, approved replacement parts andaccessories for maintenance and repair. Use of partsand accessories manufactured by others can result inproperty damage and/or personal injury.

2) Follow the Service instructions as outlined in theappropriate section of this manual.

3) Always stop the engine and disconnect the sparkplug wire or power source cable BEFORE checking orworking on the Surface Grinder.

4) Always properly maintain the Surface Grinder.Frequently check all fasteners and individual parts.Built in safety features are effective only if they aremaintained in good working condition. Replace anyquestionable part or assembly with a genuine, factoryapproved, replacement part. Do not forsake propermaintenance for the price of a few replacement parts.Proper maintenance does not cost... it actually paysdividends. Do not attempt any maintenance repair worknot described in this manual. Have such workperformed at your dealer's service facility.

5) A worn or damaged engine muffler is a fire hazardand may cause loss of hearing. Check to see that themuffler is in good condition. If the muffler is equippedwith a spark arresting device, determine that it is inproper working condition at regular service intervals.Replace the spark arresting device with an approvedreplacement if there is any question of its integrity. It isthe responsibility of the owner(s) and/or operator(s) toprovide for and properly maintain a USDA approved,spark arresting muffler in an operating area specifiedby law. Check with appropriate governing agencies formore specific information. The Surface Grinder mustnot be operated if the muffler is faulty or has beenremoved. Contact with a hot engine muffler can causeproperty damage and/or personal injury.

6) Do not operate the Surface Grinder without the useof a factory approved V-belt guard that is maintained inproper structural condition. Frequently inspect the beltguard for signs of wear, cracks and other signs offatigue. If there is any question regarding the structuralintegrity and/or condition of the belt guard, properlydispose and replace with a genuine, factory approved,replacement part only.

7) Maintain all safety and operation decals in propercondition. If any decal becomes damaged and/orunreadable, replace with a genuine, factory approved,


replacement part only.8) The Surface Grinder utilizes many self lockinghexagon head nuts to minimize the effects of vibration.Replace all self locking hardware with genuine, factoryapproved, replacement parts only.

9) Consult the information supplied by the engine orelectric motor manufacturer for specific informationrelative to proper operational, lubrication and storagerequirements.

10) Properly maintain the Propane conversationcomponents for the SG24/GHP Surface Planer. Keepforeign objects from inflicting direct contact blows withthe conversion components located next to the engine.Have only American Gas Association (AGA) and/orCanadian Gas Association (CGA) certified technicianperform any necessary service work on the Propaneconversion components. Properly utilize, service andstore Propane cylinders according to establishedAmerican Gas Association (AGA) and/or CanadianGas Association (CGA) recommended practices.Failure to properly utilize, service and store Propanecylinders can result in property damage and/orpersonal injury.

Assembly

The SG24 Series Surface Grinder is shipped from thefactory secured on a specially designed wooden palletand protected from external damage by a corrugatedcarton or wood crate. If shipped with a corrugatedcarton, the Surface Grinder can be secured to thepallet by wood laths nailed to the pallet body. Removethe carton or crate immediately upon receipt usingsuitable tools to remove the nails.

REMOVING THE SURFACE GRINDER FROM THEPALLET.

Application: All Models

Tools Required:

1 each, pliers1 each, claw hammer or a hammer and an appropriate

pry bar

The Surface Grinder is secured to the pallet with steelbanding. Using the pliers, cut and remove the banding.The Surface Grinder can then be removed from thepallet.

WEAR SAFETY GLASSES AND OTHERAPPROPRIATE SAFETY APPAREL WHEN CUTTINGTHE STEEL BANDING AND/OR REMOVING THECORRUGATED/WOOD SHIPPING CRATE.

Visually inspect the shipment for freight damage and/ormissing parts. If shipping damage is evident, contactthe delivering carrier immediately to arrange for aninspection of the damage by their claimsrepresentative. Federal law requires that a claim befiled within a specific time period. If missing parts aredetected, notify your dealer who will assist you inobtaining them.

The Surface Grinder is shipped from the factorycompletely assembled. If ordered with the SurfaceGrinder, multi-accessory attachments are normallyshipped separately to minimize the potential for lossduring shipment.

Check all fasteners for proper security. Consult afastener torque chart for the proper torque value if anyfastener is found to require retorquing.

After April 1, 1996, all Surface Grinders are shippedfrom the factory with the SG24-1000 Safety and DustShield Assembly Kit included as a standard accessory.The kit is included in a separate package and is notnormally installed by factory personnel. The ownerand/or operator (has) have the option to install the skirtassembly for any specific job application. The SG24-1000 Safety and Dust Shield is designed to perform thefollowing job functions:

1) To contain loose materials within the platform area ofthe Surface Grinder as a direct result of a specificprocess. This includes materials removed from thesurface as well as any slurry mixture utilized to helpmaximize material removal efficiencies.

2) To provide a method for a vacuum system to helpremove airborne dust related materials from within theskirt assembly. Dust related materials are usuallycreated as a result of any specific process. A specificjob application may require the reduction and/orminimization of airborne dust related materials fromthe atmosphere while the Surface Grinder is beingoperated. The kit includes a hose and necessaryhardware to connect the skirt assembly to the 3 inch


diameter vacuum attachment fitting located at the rearof the machine. Use of the kit along with a suitablevacuum system will not completely remove all airborneand loose materials directly from the work surface.

THE SG24-1000 SAFETY AND DUST SHIELDASSEMBLY KIT IS RECOMMENDED FOR USEWHERE AND/OR WHEN PERMITTED ON SPECIFICJOB APPLICATIONS TO MAXIMIZE OVERALLSAFETY AND PRODUCTIVITY. FINAL DISCRETIONIS THE RESPONSIBILITY OF THE OWNER(S)AND/OR OPERATOR(S).

THE USE OF THE SG24-1000 SAFETY AND DUSTSHIELD ASSEMBLY KIT ALONG WITH A SUITABLEVACUUM SYSTEM TO REMOVE HAZARDOUSCLASSIFIED, AIRBORNE MATERIALS FROM THEWORK SURFACE WILL NOT ELIMINATE THEREQUIREMENT FOR PROPER SAFETY RELATEDEQUIPMENT, OPERATING PLAN AND/ORPROCEDURES.

USE OF THE SG24-1000 SAFETY AND DUSTSHIELD ASSEMBLY KIT ALONG WITH A SUITABLEVACUUM SYSTEM WILL NOT COMPLETELYREMOVE ALL LOOSE MATERIALS FROM THEWORK SURFACE. HAZARDOUS CLASSIFIED,LOOSE MATERIALS MUST BE REMOVED FROMTHE WORK SURFACE BY PROCESSES AND/ORPROCEDURES MEETING THE APPLICABLE OSHAAND/OR EPA REQUIREMENTS.

INSTALLING THE SG24-1000 SAFETY AND DUSTSHIELD ASSEMBLY KIT


Tools Required:

1 each, 5/32 inch Allen wrench1 each, 7/16 inch wrench2 each, 1/2 inch wrenches1 each, flat blade screwdriver

1) If the Surface Grinder is powered by an engine,disconnect the spark plug wire. If powered by an

electric motor, properly disconnect the extension cordor Surface Grinder from the power source.

2) Using the Allen wrench, remove the PN SG24-0220bumper guard from the machine.

3) Tilt the Surface Grinder back until the operatorhandle comes in contact with the surface. The SurfaceGrinder may not be in a stable position in thisconfiguration. To minimize the possibility of propertydamage and/or personnel injury, properly secure anappropriate weight to the handle for added stability.Other means can be utilized to support the frame andprovide proper machine stability. Appropriate wheelchocks are also recommended, FIGURE 1.

EXERCISE EXTREME CAUTION WHEN WORKINGNEAR OR UNDER THE SURFACE GRINDER WITHTHE OPERATOR HANDLE TILTED BACK IN THESERVICE POSITION. IF THE SURFACE GRINDER ISNOT POSITIONED IN A STABLE CONFIGURATION,WITH ADEQUATE COUNTERWEIGHT PROPERLYSECURED, UNEXPECTED MOVEMENT CANALLOW THE SURFACE GRINDER TO FALL BACKTO THE WORK SURFACE. THE RESULT CAN BEPROPERTY DAMAGE AND/OR PERSONAL INJURY.

4) Using the 7/16 inch wrench, install the PN SG24-0230 rubber skirt around the outside perimetersurrounding the multi-accessory discs. Secure with thePN 15040700 cap screws and PN 49050000 washers.The original bumper and PN 27040800 cap screwscan also be utilized as an alternative attachmentmethod. The notches in the rubber skirt are provided asa means to compensate for multi-accessoryattachment wear (if applicable). Adjust the location ofthe rubber skirt to provide the necessary clearancebetween it and the work surface. Improper clearancewill accelerate skirt wear, FIGURE 2.


FIGURE 1

FIGURE 2

5) Using the 1/2 inch wrenches, the PN SG24-0350rubber skirt is attached to the middle support memberof the main frame. Proper installation will have the hoseattach fitting that is riveted to the skirt facing the rear ofthe machine. The notches in the rubber skirt areprovided as a means to compensate for multi-accessory attachment wear (if applicable). Adjust thelocation of the rubber skirt to provide the sameclearance as with the PN SG24-0230 rubber skirt. ThePN SG24-0370 skirt straps provide additional supportfor the rear skirt assembly. Properly secure with the PN15050700 cap screws and PN 53050000 self lockingnuts, FIGURE 3.

FIGURE 3

6) Assemble the two each, PN 56480000 hose clampsover the PN SG24-0380 vacuum hose. Install thevacuum hose over the vacuum hose attach fittings.Determine that the configuration minimizes potentialkinks or depressions which can reduce the airflow.Secure the hose clamps tight with the screwdriver.

7) The PN SG24-1000 Safety and Dust ShieldAssembly Kit can be removed by reversing the aboveprocedure and reinstalling the original PN SG24-0220bumper.

8) Return the Surface Grinder to its normal operatingposition.

9) If the Surface Grinder is powered by an engine,reconnect the engine spark plug wire. If powered by anelectric motor and the machine is to be usedimmediately, reconnect the extension cord or SurfaceGrinder to the power source. Determine that theON/OFF switch located on the operator handle is in theOFF position.

UNEXPECTED MACHINE START UP CAN RESULTIN PROPERTY DAMAGE AND/OR PERSONALINJURY.


Before Starting the Engine

FILLING THE ENGINE CRANKCASE WITH OIL.

Applications: SG24/G Series and SG24/GHPSurface Grinder

Note: The SG24/GHP Surface Grinder is shipped withoil in the engine crankcase and with the Propanecylinder empty. Units are test run to insure that thePropane conversion components are functioningproperly. Regular gasoline powered units are selectedat random at the factory and also test run. These unitsare shipped with oil in the engine crankcase. Fuel isdrained from the fuel tank and will be markedaccordingly by factory personnel.

Tools Required:

1 each, small, clean funnel

The SG24/G Series Surface Grinder is availableequipped with a variety of industrial quality, gasolineand diesel engines. Engines are not normallypreserviced at the factory (see note above) and willrequire the addition of oil in the crankcase before beingplaced in service. Consult the material supplied by theengine manufacturer for the engine that has beenordered with your Surface Grinder. Carefully review thismaterial to become familiar with specific operatingcharacteristics, recommendations and servicerequirements.

1) Determine the location(s) of both the oil filler and oildrain plug(s).

2) Wipe oil, dust and accumulated dirt from the fillerplug area.

3) Using the funnel, fill the engine crankcase with ahigh grade motor oil. Consult the material supplied bythe engine manufacturer for proper amount, weight andservice classification.

4) Replace the oil filler plug and tighten. Wipe off anyexcess oil spilled on the engine crankcase and SurfaceGrinder.

5) Do not operate the engine unless proper oil level ismaintained as per the material supplied by the enginemanufacturer.

FILLING THE SG24/G SERIES ENGINE FUEL TANK.

Tools Required:

1 each, small, clean funnel

NEVER MIX OIL WITH GASOLINE. FOUR CYCLEENGINES ARE NOT DESIGNED TO BE OPERATEDWITH OIL MIXED WITH THE GASOLINE.

1) Determine the location of the fuel tank filler cap.

2) Carefully clean the filler cap and surrounding area toinsure that no dirt or debris falls into the fuel tank.Remove the filler cap.

3) Using the funnel, fill the fuel tank with fresh, cleanfuel according to the specifications outlined in thematerial supplied by the engine manufacturer. Do notoverfill the tank or spill any fuel. If the fuel tankincorporates a screen mesh to prevent debris fromfalling into the tank, do not remove to increase the fillrate. Replace the filler cap. Wipe away any excessspilled fuel.

MANY FUELS ARE EXTREMELY FLAMMABLE. DONOT SMOKE NEAR THE FUEL TANK. DO NOT FILLTHE FUEL TANK WITH THE ENGINE RUNNING ORIF IT IS HOT. ALLOW AMPLE TIME BETWEEN EACHREFUELING FOR THE ENGINE TO COOL.

FILLING THE SG24/GHP PROPANE CYLINDER.

The SG24/GHP Surface Grinder is shipped from thefactory with a Propane conversion kit for the HondaGXV340 engine and supplied with a standard 20 lbcapacity Propane cylinder. The Propane conversion isperformed by knowledgeable personnel licensedand/or certified to perform the conversion. A copy ofthe original licensing certificate is shipped with eachmachine. If the original certificate becomes destroyedor lost, contact the Customer Service Department for aduplicate. There is no charge for this service.

Empty Propane cylinders should always be filledaccording to established, industry standards by


qualified personnel. Cylinders should be tested forstructural integrity according to industry standardsand/or local code requirements by qualified personnelonly.

IMPROPER USE, HANDLING AND MAINTENANCEOF THE PROPANE CYLINDER CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.INSPECT THE CYLINDER, VALVE, FITTINGS,HOSES AND HARDWARE FOR DAMAGE BEFOREAND AFTER EACH USE. REPLACE ANYQUESTIONABLE COMPONENT WITH A FACTORYAPPROVED REPLACEMENT ONLY. DO NOTALLOW ANY PERSONNEL TO OPERATE APROPANE CONVERTED ENGINE UNTIL PROPERAND/OR ADEQUATE INSTRUCTION HAS BEENGIVEN WITH FULL COMPREHENSION.

PROPANE IS AN EXPLOSIVE GAS. DO NOTSMOKE OR INTRODUCE AN OPEN FLAME IN ORNEAR THE PROPANE CYLINDER AT ALL TIMESWHEN FILLING, OPERATING/UTILIZING THESURFACE GRINDER OR PERFORMING ANYMAINTENANCE.

Operation

THEORY OF OPERATION.


The SG24 Series Surface Grinders operate on theprinciple of various multi-accessory attachments beingutilized at rotational speeds to make direct contact witha work surface. Various types of multi-accessoryattachments are secured to recesses provided in two,counterrotating, aluminum discs located on the bottomof the machine. The specific type of multi-accessoryattachment utilized during the grinding process directlyaffects the type of material removed, the materialremoval rate and the resulting flatness andsmoothness of the surface.

The grinding process is directly controlled by these

conditions:

1) The use of a suitable mechanism (multi-accessoryattachment) of proper design and configuration to grindthe work surface and remove material while deliveringacceptable service life.

2) Sufficient static weight supporting the multi-accessory attachment to allow it to effectivelypenetrate the work surface and remove material.

3) Adequate horsepower capable of propelling themulti-accessory attachment against the work surfaceto deliver acceptable productivity rates.

Since no two materials are exactly alike, no two worksurface materials can be penetrated and removed bythe exact same method. The nature of the grindingprocess, along with operator experience, skill andcommon sense, would suggest that efficient andproductive material removal is a matter of trial anderror. Combinations of multi-accessory attachmenttype, condition, and feed rate are direct factors that willalso determine the overall success of the jobapplication.

MULTI-ACCESSORY ATTACHMENTS ANDAPPLICATIONS.


While individual multi-accessory attachment designand configuration may vary, basic operationalcharacteristics are identical: impact upon a worksurface material and remove a percentage of thematerial. This common operational characteristic hasled to the development of the following popular multi-accessory attachments:

Grinding Stones

Grinding stones are available in a number of grades,including: C06 extra coarse, C10 coarse, C24 medium,C80 fine and C120 super fine grade. All stonesincorporate silicon carbide as the abrasive mediumand employ a clay binder as the matrix material.Vitrified type stones utilize an oven baking process thatproduces greater service life over other manufacturingprocesses. As the clay material wears away, it exposesnew, sharp, edges of the imbedded silicon carbidematerial. All stones have the identical 2" x 2" X 4"dimensions and are secured to the machine by the useof a hardwood wedge, FIGURE 4.


FIGURE 4

The designation system for the grinding stones utilizesa system similarly utilized for most abrasive products:the larger the number, the finer the grain structure andusually, the smoother the resulting finish.

a) The C06 and C10 coarse grade stones are the mostpopular utilized stones and result in maximum materialremoval rates. They are utilized for general grindingand the removal of trowel marks, high spots and roughsections on concrete surfaces. The average service lifeis approximately 4 to 10 hours.

b) The C24 medium grade stone will result in lowermaterial removal rates. It is utilized for finer finishgrinding of concrete and rough grinding on terrazzoand other types of stone floor configurations. Theaverage service life is approximately 6 to 10 hours.

c) The C80 fine grade stone will result in still lowermaterial removal rates. It is utilized for polishingconcrete and medium grinding on terrazzo and othertypes of stone floor configurations with a water/slurrymixture only. The average service life is approximately8 to 20 hours.

d) The C120 super fine grade stone will result in thelowest material removal rates. It is utilized for finalpolishing on terrazzo and other types of stone floorconfigurations with a water/slurry mixture only. Theaverage service life is approximately 40 to 75 hours.

Tungsten Carbide Grinding Block

This multi-accessory attachment is most often utilizedon larger concrete grinding projects where increasedproduction and service life are required. The blockutilizes tungsten carbide balls approximately 1/16 inchdiameter that are deposited in a molten matrix material

during the manufacturing process at a controlled rate.The end effect is a multi layer deposit of tungstencarbide balls in the matrix material. As the softer matrixmaterial wears with use, it exposes a new layer of freshtungsten carbide balls to continue the grindingprocess. The tungsten carbide grinding block isconsiderably more aggressive than the C10 siliconcarbide grinding stone. With the ability to renew itselfduring usage, the normal life expectancy for thisaccessory can approach several hundred hours. Thenominal dimensions for the tungsten carbide grindingblock is 2" x 2" x 4" and is secured to the machine witha hardwood wedge, FIGURE 5.

FIGURE 5

Scarifier Blocks

These multi-accessory attachments are comprised offlails and spacer washers secured in a rigid steel case,FIGURE 6. Rotation of the two multi-accessory discscauses the flails to impact against the work surfacewith a variety of results. Scarifier blocks are secured tothe machine with hardwood wedges.

Several factors directly affect the selection of a flaildesign for a specific job application:

a) The type and amount of material to be removed fromthe work surface. Materials of higher yield and tensilestrengths along with the actual volume of material to beremoved will generally be the first factors underconsideration.

b) Purchase cost versus service life. The originalpurchase cost of plain, heat treated steel flails must becompared against the substantially higher costs of thetungsten carbide insert flails. In turn, these costs mustbe compared to anticipated service life. All flails willeventually wear to the point of requiring replacement.


The amount of unproductive time spent to replace wornflails on a job can be substantially greater than theactual replacement cost of many flails. It then becomesa balance between purchase cost, productivity, servicelife and labor cost.

c) Surface finish and texture. The finest grained surfacefinish available from the scarifying process iscomparable to a "swept or broomed" like finish. If asmooth, flat finish is desired, the scarifying processmust be followed with a grinding or polishing typeprocess. Many job requirements may call for largeamounts of material to be removed, but followed withadditional specifications requiring a finer surface finishor texture. Many times these jobs dictate the use of anaggressive flail configuration because of productivityand cost considerations. Less aggressive flailconfigurations can then be utilized for the final finishingsequence. Generally speaking, the more aggressivethe flail configurations, the more coarse the resultingfinish and texture.

Many flail configurations are available to meet a widevariety of job applications and surface materialspecifications. To give additional perspective to eachconfiguration, a rating system of 1 to 10 (10 beinghighest) has been devised.

FIGURE 6

Star Flail

The star flail is manufactured from high carbon steelthat is thoroughly hardened for additional service life. Itis highly effective for light cleaning or scarifying anddelivers a finer surface finish texture, FIGURE 7.

Suggested applications:

1) Removal of thin coatings and encrustedaccumulations.

2) Cleaning concrete and asphalt surfaces.

3) Removing thick material build-ups of greases,paints, oils, vegetable powders and some resins fromfloors.

4) Light scarifying prior to the application of coatings,toppings or sealers.

FIGURE 7COST 1PRODUCTIVITY 3SERVICE LIFE 1

The star flail should be replaced when the outsidediameter is worn to approximately 1-5/16 inch or theinside diameter elongates to approximately 3/4 inch.

Beam Flail

The beam type flail is manufactured from high carbonsteel that is thoroughly hardened for additional servicelife. It is highly effective for scabbling or scarifying anddelivers medium to coarse surface finish texture,FIGURE 8.


FIGURE 8


1) Medium duty asphalt and concrete scarifying.

2) Descaling steel decks.

3) Removing thick material build-ups of greases,paints, oils, vegetable powders and some resins fromfloors.

4) Dried, fully cured, carpet and tile adhesive removal.

COST 1PRODUCTIVITY 5SERVICE LIFE 2

The beam flail should be replaced when the outsidediameter is worn to approximately 1-5/16 inch or theinside diameter elongates to approximately 3/4 inch.

Pentagonal Flail

The pentagonal type flail is manufactured from highcarbon steel that is throughly hardened for additionalservice life. Each section of the five sided designfeatures a small, tungsten carbide insert that is held inposition with copper brazing. It is highly effective forscabbling or scarifying and delivers medium to coarsefinish texture, FIGURE 9.

FIGURE 9


1) Heavy duty asphalt and concrete scarifying.

2) Heavy duty descaling of steel decks.

The pentagonal flail is designed for more aggressiveand rapid removal of a surface in comparison to thebeam flail. The addition of the tungsten carbide insertscontributes to its long service life and higher productionrates. The use of tungsten carbide is also the mainreason for the cost differential between it and the otherflails. The design configuration yields a rather coarsesurface finish and texture. For many job applications,this finish and texture will be satisfactory. Someapplications may require an additional smoothingprocess. If the resulting surface finish is too coarse tomeet specifications, it can be smoothed with the use ofthe star or beam flail.

COST 10PRODUCTIVITY 8SERVICE LIFE 10

The pentagonal flail should be replaced when twosuccessive tungsten carbide inserts break off or theinside diameter elongates to approximately 3/4 inch. Inservice, the flail body will wear much faster than thetungsten carbide inserts. The copper brazing used toweld the inserts into the body can fail and an insertbreak off. The flail can still be used in service. It will justwear a little faster and more uneven in that particulararea. As a general rule, a pentagonal flail can beutilized until body wear will no longer support thetungsten carbide inserts.


Spacer Washer

Spacer washers are stamped from high carbon steeland heat treated for additional service life, FIGURE10.

FIGURE 10

Spacer washers serve the following function:

1) Reduces the number of flails required to be mountedon the scarifier block, thus reducing purchase andoperational costs.

2) Arrange the flails in a sequence or pattern thatminimize "blind" or "open" spots. Normally, at least onespacer washer is inserted between two consecutiveflails. A scarifier block set up with only star, beam orpentagonal flails will not penetrate the work surface atsatisfactory rates. This configuration will minimize thehammering or impact action of the flails.

Variances in material thickness and manufacturingprocesses can affect the final thickness of both flailsand spacer washers. Because of this occurrence, trialand error is important for assembling flails and spacerwasher on the scarifier block. By mixing and matchingflails and spacer washers of specific thicknesses, therequired number of components can be assembled ona block in a minimum amount of time.

USE ONLY FACTORY SUPPLIED SPACERWASHERS ON THE SCARIFIER BLOCK. OTHERWASHER TYPES AND/OR CONFIGURATIONS CANPRODUCE ABNORMAL WEAR AND ELONGATION,

RESULTING IN COMPLETE SEPARATION FROMTHE SCARIFIER BLOCK. INADVERTENT SPACERWASHER SEPARATION CAN LEAD TO PROPERTYDAMAGE AND/OR PERSONAL INJURY.

Scarifier Block Bushing

Scarifier block bushings are designed to be discardedwhenever the flails are replaced, FIGURE 11. Normalwear should be uniform about the bushingcircumference.

FIGURE 11

Uneven bushing wear would suggest the followingproblems:

1) Inadequate free play exists between the flails/spacerwashers and the scarifier block case. If the flails andspacer washers do not have complete freedom ofmovement, they will not be capable of properly rotatingabout the scarifier block bushing. The result is bushingwear usually confined to two locations that are 180degrees apart. Variances in flail and spacer washerthicknesses affect free play when assembled on thescarifier block. Because free play is also created duringthe scarifying process due to actual flail and spacerwasher wear, a certain amount of "tightness" cansometimes be tolerated without affecting the servicelife of the bushings and flails. The specific amount of"tightness" can usually be determined through trial anderror. If the flails and spacer washers appear too tighton the scarifier block, remove an appropriate flail orwasher and reassemble the block. If a short,operational test indicates normal component wearpatterns, the apparent problem has been solved. Ageneral rule for consideration: it is better to have theflails and spacer washers a "little too loose than a littletoo tight".


2) Mixing both worn and new flails on the scarifierblock. Proper flail action against the work surfacematerial requires that the flails be of the sameapproximate dimensions. Flails with various inside andoutside dimensions will not impact the work surfacematerial with the same intensity and deliver the sameresults. Flail bushing wear is directly proportional to theamount of force it must supply against each individualflail. When a bushing can no longer supply adequateforce against the flails, it will break, allowing the flails tobe hurdled against the inside of the Surface Grinderframe. The more aggressive flails require greater forcesto keep them contained on the block. These forces, inturn, create faster and/or uneven bushing wear rates.

Because scarifier bushings are a critical component ofthe actual scarifying process, it is important that eachbushing be inspected on a regular basis to determineproper structural integrity.

Wire Brushes

Typical applications include light scarifying andcleaning of concrete, asphalt, steel and tile surfaces.Wire brushes are secured to the machine withhardwood wedges, FIGURE 12.

Wire brushes are available in a number of flat wiresizes and resulting configurations. With continuoususe, the flat wire will take a "set" that can limiteffectiveness and overall productivity, FIGURE 13. Forbest results, flat wire brushes should be rotated end forend in the aluminum multi-accessory discs a minimumof once for every one hour of operation. External weightapplied to the Surface Grinder will not normallyincrease productivity rates and only accelerate flat wirewear rates.

FIGURE 12

FIGURE 13

Floor Brushes

Eleven inch diameter, silicon carbide impregnated,floor brushes are available in a number of styles anddesigns for general maintenance and cleaningprojects, FIGURE 14. They are especially effectivecleaning soiled concrete floors with the addition ofwater soluble solvents. These types of brushes aredirectly mounted to the multi-accessory discs with theincluded 1/2 inch x 2 inch long Grade 5 cap screws. Akidney shaped drive plate is provided on the back sideof the brush. This drive plate fits into a recess providedin the multi-accessory disc, FIGURE 15. To maximizebristle service life, it is recommended that the siliconimpregnated brushes be rotated between multi-accessory discs a minimum of once for every one hourof operation.

FIGURE 14


FIGURE 15

SCRAPE-R-TACH® Industrial Floor CoatingsRemoval System

This multi-accessory attachment is designed to removemany urethanes, epoxies, paints, mastics and other,similar material accumulations from concrete floorsurfaces, FIGURE 16. Each assembly utilizes twotungsten carbide inserts set at a precise angle. Therotating inserts "cut and shave" against the worksurface material with a "scraping" action that removesmaterials with highly productive results. To increase theeffectiveness of the inserts, the scraper block designincorporates a Lord® type rubber mount that helpsabsorb damaging shocks while allowing the inserts tomore easily follow local variations in the surfacecontour. Units are secured to the machine withhardwood wedges.

FIGURE 16

The productivity of the product is directly dependentupon the yield and tensile strength of the material

being removed. Material thickness has also shown tohave a direct effect on overall productivity. For example,the SCRAPE-R-TACH system is a highly productivemethod for removing thick paint accumulations fromfactory floors. Production rates of up to severalhundred square feet per hour can be realized.However, many thin film ( ie: 5 mill thickness andthinner) urethane coatings present a much moredifficult removal problem. Since removal rates are alsodirectly affected by applied down force, up to 300 lbs ofexternal weight can be added to the Surface Grinder toincrease productivity. Cement blocks or stacked bagsof cement make excellent weights and can be securedwith "bungy" cords or other means with the providedholes in the top cover, FIGURE 17.

FIGURE 17

Each insert provides 8 scraping edges. As an edgebecomes dull and worn, the insert can be turned andreinstalled to expose a new, sharp edge, FIGURE 18.When all 4 edges of one side become worn and dull,the insert can be turned over to expose an additional 4edges.

Many materials such as adhesives, rubber depositsand mastics have the tendency to extrude or smearrather than shear from the concrete floor material. Theoccurrence is also aggravated by higher ambienttemperatures. This problem can be significantlyreduced with the addition of various amounts of wateror a water saturated, fine sand combination placed onthe floor. The use of the Part Number SG24-1000Safety and Dust Shield Assembly with the SurfaceGrinder is highly recommended to contain thewater/sand slurry mixture from damaging surroundingwalls and other vertical surfaces, FIGURE 19.


FIGURE 18

FIGURE 19

To index the tungsten carbide insert, proceed asfollows:

Tools required:

1 each, 5/32 Allen wrench1 each, 7/16 inch wrench

1) Clean the SCRAPE-R-TACH unit with a suitablesafety solvent to remove excess material build-up.Remove as much foreign material as possible from thefemale hexagon socket area of the cap screw. This willallow the wrench to make full contact and maximize thetorque transfer to the cap screw.

Follow all safety precautions for the safety solvent.

2) Remove the cap screw from the unit. Clean thenewly exposed areas of the insert and SCRAPE-R-TACH unit with the safety solvent. Clean and inspectthe threaded holes found in older units for excess wear.New style SCRAPE-R-TACH units feature a throughhole design.

3) Index the insert to expose a new edge. Reinstall thecap screw (lock washer and hexagon nut on new styleunits) and apply a torque value that properly seats theinsert firmly against the body of the unit.

An insufficient seating torque value will allow theinsert to become loose from the unit body,resulting in premature component wear andimproper scraping action. An excessive torquevalue will strip the threads of the cap screw or unitbody.

4) Determine that the unit body is free to rotate aboutthe 5/16 inch diameter cap screw that retains the bodyto the unit. A body that does not freely rotate indicatesthat a material build-up exists between the rubbermount and retaining cap screw exits. This build-up mustbe removed by disassembling the body from the unitand cleaning all contact areas with the safety solvent,FIGURE 20.

The SCRAPE-R-TACH system is designed to beinstalled with the edge of the tungsten carbide insertsfacing the direction of rotation. Markings are providedto indicate proper direction of rotation.


FIGURE 20

Installing the SCRAPE-R-TACH system with thetungsten carbide inserts facing opposite therotation direction will not deliver satisfactorymaterial removal rates and result in prematurecomponent wear requiring early replacement.

Multi-Segmented, Dry Diamond Disc

Many times increased concrete removal rates can beachieved with the use of multi-segmented, dry diamonddiscs, FIGURE 21. These discs are designed tooperate dry or can also be utilized with water. If the wetoption is chosen, an external source for providing watermust be devised. No provision for water use is providedwith the Surface Grinder. Typical discs areapproximately 10 inches in diameter and feature up to20 diamond segments that are welded or brazed toeach assembly.

To install the multi-segmented, dry diamond discs, thestandard, aluminum, multi-accessory discs are firstremoved from the Surface Grinder. The diamond discsfasten directly to the gimbal heads with 3/8 inchdiameter x 1 inch long Allen head cap screws, FIGURE22. The rear wheel assembly is then placed in thelowest position to compensate for the thicknessvariance of the diamond disc, FIGURE 23.

FIGURE 21

To maximize the service life of the diamond segments,its is recommended that the blades be rotated betweengimbal heads a minimum of once for every 8 hours ofoperation.

FIGURE 22

Diamond Segment Block

The diamond insert block is designed to complimentthe multi-segmented diamond disc where a quickchangeover feature to other attachments is desired.

Diamond segments are retained into a steel blockassembly and deliver up to 5 times greater productivityrates than the silicon carbide stones, FIGURE 24. Thedesign resists clogging while delivering a conservativeservice life up to 15 times longer than the stones.Diamond is the ideal choice for larger concrete removalprojects and the removal of epoxies, paints and manythin film coatings.


FIGURE 23

The concept is especially useful for removing a thinlayer of concrete in final preparation for a new coatingapplication. Can be used in both wet and dry jobapplications. Worn inserts are easily replaced in amatter of seconds. Service life is dependent uponmany variables, but can approach 35,000 square feetper set, making it a cost efficient solution for many jobapplications.

FIGURE 24

INSTALLING A MULTI-ACCESSORY ATTACHMENT(not including multi-segmented, dry diamonddiscs) IN THE COUNTERROTATING DISCS.


Tools required:

1 each, small hammerParts required:

6 each, PN SG24-1800 Mounting Wedge

WHEN INSTALLING A MULTI-ACCESSORYATTACHMENT ON THE SURFACE GRINDERALWAYS WEAR THE APPROPRIATE SAFETYEYEWEAR AND APPAREL TO MINIMIZE THEPOTENTIAL FROM FLYING DEBRIS. FLYINGDEBRIS CAN RESULT IN PROPERTY DAMAGEAND/OR PERSONAL INJURY.

1) If the Surface Grinder is powered by an engine,disconnect the spark plug wire. If powered by anelectric motor, properly disconnect the extension cordor Surface Grinder from the power source

2) Tilt the Surface Grinder back until the operatorhandle comes in contact with the surface. The SurfaceGrinder may not be in a stable position in thisconfiguration. To minimize the possibility of propertydamage and/or personal injury, properly secure anappropriate weight to the handle for added stability.Other means can also be utilized to support the frameand provide proper machine stability. Appropriatewheel chocks are also recommended, FIGURE 25.

EXERCISE EXTREME CAUTION WHEN WORKINGNEAR OR UNDER THE SURFACE GRINDER WITHTHE OPERATOR HANDLE TILTED BACK IN THESERVICE POSITION. IF THE SURFACE GRINDER ISNOT POSITIONED IN A STABLE CONFIGURATION,WITH ADEQUATE COUNTERWEIGHT PROPERLYSECURED, UNEXPECTED MOVEMENT CANALLOW THE SURFACE GRINDER TO FALL BACKTO THE WORK SURFACE. THE RESULT CAN BEPROPERTY DAMAGE AND/OR PERSONAL INJURY.


FIGURE 25

3) Mount the multi-accessory attachment into the slotsprovided in the multi-accessory discs. If the attachmentis directional in design, determine that its mountingposition in the disc allows for proper operation.

4) Force an SG24-1800 Mounting Wedge into the areabetween the multi-accessory attachment and theinside rib of the aluminum disc by hand. The straightside of the mounting wedge contacts the multi-accessory attachment. The angled side of themounting wedge contacts the rib of the disc, FIGURE26. An improper mounting configuration is depicted inFIGURE 27.

FIGURE 26

FIGURE 27

DO NOT OPERATE THE SURFACE GRINDER WITHTHE SG24-1800 MOUNTING WEDGES IN ANIMPROPER MOUNTING CONFIGURATION.MOUNTING A WEDGE BETWEEN THE MULTI-ACCESSORY ATTACHMENT AND THE OUTSIDERIB OF THE ALUMINUM DISC CAN ALLOW THEWEDGE TO COME IN DIRECT CONTACT WITH AVERTICAL WALL AND/OR FLOOR OBSTRUCTION.SUCH OCCURRENCE CAN RESULT IN LOSS OFMACHINE CONTROL, PROPERTY DAMAGEAND/OR PERSONAL INJURY.

BEFORE OPERATING THE SURFACE GRINDERWITH ANY MULTI-ACCESSORY ATTACHMENT,DETERMINE THAT NO PORTION OF THEATTACHMENT AND/OR MOUNTING WEDGEEXTENDS BEYOND THE NORMAL PERIMETER OFTHE ALUMINUM DISC.

5) Using the hammer, strike the wider side of themounting wedge with controlled, direct blows to firmlyseat the multi-accessory attachment into the aluminumdisc. Usually one or two direct blows will be sufficientto properly retain the attachment.

Do not apply excessive impact force to themounting wedge to cause splitting. Once the multi-accessory attachment is seated in the aluminumdisc, further impact force on the wedge will notincrease the seating force.


Improper seating force created by an excessiveblow to the mounting wedge will not allow theattachment to properly release from the aluminumdisc if direct contact with a foreign object is made.Such occurrence can result in property damageand/or personal injury. The correct seating force fora specific job application is that which is sufficientto retain the attachment, yet still allows it to releasefrom the aluminum disc when direct contact with aforeign object is made.

6) Determine that the multi-accessory attachment is infull contact with the aluminum disc. If not in propercontact, refer to REMOVING A MULTI-ACCESSORYATTACHMENT (not including multi-segmented, drydiamond blades) FROM THE COUNTERROTATINGDISCS for proper removal procedures.


8) If the Surface Grinder is powered by an engine,reconnect the engine spark plug wire. If powered by anelectric motor and the machine is to be usedimmediately, reconnect the extension cord or SurfaceGrinder to the power source. Determine that theON/OFF switch located on the operator handle is in theOFF position.


REMOVING A MULTI-ACCESSORY ATTACHMENT(not including multi-segmented, dry diamonddiscs) FROM THE COUNTERROTATING DISCS.


Tools required:

1 each, small hammer1 each, drift punch or small, pry bar

WHEN REMOVING A MULTI-ACCESSORYATTACHMENT FROM THE SURFACE GRINDER,ALWAYS WEAR APPROPRIATE SAFETY EYEWEARAND APPAREL TO MINIMIZE THE POTENTIALFROM FLYING DEBRIS. FLYING DEBRIS CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

1) If the Surface Grinder is powered by an engine,disconnect the spark plug wire. If powered by anelectric motor, disconnect the extension cord orSurface Grinder from the power source.

2) Tilt the Surface Grinder back until the operatorhandle comes in contact with the surface. Follow theinstructions for this procedure as outlined inINSTALLING A MULTI-ACCESSORY ATTACHMENT(not including multi-segmented, dry diamond blades)IN THE COUNTERROTATING DISCS.

3) The multi-accessory attachment can be removed byboth the use of a drift punch or small, pry bar. If utilizingthe drift punch, strike the narrow end of the mountingwedge with controlled, direct blows until the attachmentis released from the aluminum disc. If utilizing the prybar, position the bar between the aluminum disc andthe attachment. Use controlled, direct blows to the barin order to force the attachment loose from thealuminum disc, FIGURE 28.

FIGURE 28


Do not utilize excessive force when removing amulti-accessory attachment with the pry bar.Excessive force can result in damage to thealuminum disc. Proper removal techniques by bothmethods will result in minimal damage to thealuminum disc.


5) If the Surface Grinder is powered by an engine,reconnect the spark plug wire. If powered by an electricmotor and the machine is to be used immediately,reconnect the extension cord or Surface Grinder to thepower source. Determine that the ON/OFF switchlocated on the operator handle is in the OFF position.


TRANSPORTING THE SURFACE GRINDER.


The Surface Grinder has an operational weight thatprohibits one person from loading and/or unloading italone by conventional, physical efforts.

DO NOT ATTEMPT TO LIFT THE SURFACEGRINDER UP INTO A TRANSPORTATION VEHICLEWITH THE USE OF ONE PERSON ALONE. DO NOTATTEMPT TO LOWER THE SURFACE GRINDERFROM A TRANSPORTATION VEHICLE WITH THEUSE OF ONE PERSON ALONE. LIFT AND/ORLOWER THE SURFACE GRINDER ONLY BY THEUSE OF A POWER TAILGATE UNIT, A SUITABLEHOIST UNIT OF PROPER CAPACITY AND/ORCONFIGURATION OR BY THE USE OF A PROPERQUANTITY OF PERSONNEL IN PROPER PHYSICALCONDITION.1) A lifting bail device can be used to facilitate lifting by

a mechanical device incorporating a chain and suitableattachment device. The location of the lifting bail maynot always locate the exact position of the center ofgravity for the Surface Grinder. Lifting handles are alsoprovided on both sides of the transmission case.These handles can be utilized by personnel wheneverlifting/lowering the Surface Grinder or as attachmentpoints for a chain sling whenever a suitable hoistingdevice is utilized, FIGURE 29.

EXERCISE EXTREME CAUTION WHEN UTILIZINGA MECHANICAL DEVICE FOR LIFTING THESURFACE GRINDER. UTILIZE THE MECHANICALDEVICE IN ACCORDANCE TO BOTH ITS STATEDSTATIC AND DYNAMIC LOADING ENVELOPES. DONOT UTILIZE THE MECHANICAL DEVICE UNTILTHIS INFORMATION IS PROPERLY KNOWN ANDUNDERSTOOD BY ALL APPLICABLEPERSONNEL. FAILURE TO PROPERLY UTILIZETHE MECHANICAL DEVICE CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.

2) When transporting the Surface Grinder on a motorvehicle, the fuel tank breather vent (if so equipped)must be completely closed to eliminate the accidentalseepage of fuel and resulting potential fire andenvironmental hazards. If the engine is Propaneconverted, the cylinder should be removed from theSurface Grinder and all valves, hoses, fittings andrelated hardware be inspected for proper security andleaks. Transport the Propane cylinder in accordance toall local, State and Federal regulations. Properlysecure and store the Propane cylinder to minimize thepossibility of property damage and/or personal injury.

3) To minimize the possibility of damage to the SurfaceGrinder, always transport in its normal, uprightposition. All equipment must be secured in/on vehicleswith suitable strapping or tie-downs. Personnel shouldnot be transported in the same compartment asequipment and fuel supplies. Consult applicableOSHA, AGA, CGA, etc. regulations for the propertransportation of Propane and other, flammable gases.

ADJUSTING THE OPERATOR HANDLE HEIGHT.


The SG24 Series Surface Grinder incorporates ahandle that can be adjusted to compensate forvariances in operator heights. Three adjustment


heights are provided. Correct handle height canincrease overall machine productivity and reduceoperator fatigue.

FIGURE 29

Tools Required:

1 each, 3/4 wrench or suitable alternative.

1) Using the wrench, loosen the 1/2 inch hexagon nutsfrom the stud assemblies that retain the handle to themain frame.

2) Using the wrench, remove the 1/2 inch cap screwsthat retain the handle in position on the main frame.

EXERCISE EXTREME CAUTION WHEN REMOVINGTHE RETAINING CAP SCREWS FROM THE MAINFRAME. WHEN THE FINAL CAP SCREW ISREMOVED, THE HANDLE IS PROVIDED WITH NOEXTERNAL SUPPORT AND WILL IMMEDIATELYDROP TO THE FLOOR. SUCH OCCURRENCE CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

3) Reposition the operator handle in the desiredlocation that aligns the hole in the handle with thethreaded hole in the main frame. Replace the 1/2 inchhexagon cap screws and properly tighten with thewrench, FIGURE 30.

4) Using the wrench, properly tighten the 1/2 inch

hexagon nuts on the stud assemblies that retain thehandle to the main frame.

FIGURE 30

STARTING THE SG24/E SERIES ELECTRICALLYPOWERED SURFACE GRINDER ON THE JOB SITE.

1) Position the Surface Grinder on a flat and levelsurface of firm foundation.

2) Determine that the ON/OFF switch located on theoperator handle is in the OFF position.


3) Select the appropriate operating voltage for theelectric motor. The motor is designed to operate froma clean, 20 ampere, 115 VAC, 60 Hz nominal or aclean, 10 ampere, 230 VAC, 60 Hz nominal powersource. A clean power source refers to the amperageavailable on the individual electrical circuit selected.Additional electrical products already utilizing the samecircuit will reduce the available amperage, resulting instarting and operational difficulties.

A voltage switch (115/230 VAC, 60 Hz) is provided onthe motor. For added security, the voltage switch canbe locked in position with a combination or keyed lockwith an extended shank length, FIGURE 31.


Operating the Surface Grinder from a power sourceof improper voltage and amperage will result inunrepairable damage to the electric motor andrelated controls.

FIGURE 31

4) Providing proper voltage and amperage levels to theelectric motor is essential to obtain maximumproductivity and service life. Low voltage andamperage levels will cause the motor to overheat. Themotor is equipped with automatic thermal protectiondevice that will stop it before major internal damagecan result. After the motor has cooled to an acceptabletemperature level, the switch must be manuallyactivated to restart, FIGURE 32.

To minimize the voltage drop to the motor, all extensioncords should be copper stranded, 8 AWG or larger. ANEMA 6-20R twist lock type receptacle is provided withthe SG24/E Series Surface Grinder as a standardaccessory. The twist lock feature allows the extensioncord to be pulled by the Surface Grinder withoutbecoming detached. Wire the NEMA 6-20R receptacleto the appropriate extension cord that will be coupledto the NEMA 6-20P plug provided on the SurfaceGrinder, FIGURE 33.

FIGURE 32

FIGURE 33

PROPERLY INSPECT ALL EXTENSION CORDSAND WIRING DEVICES FOR STRUCTURALINTEGRITY. DO NOT UTILIZE A CORD WITH AWORN OR CUT OUTER JACKET MATERIAL. DONOT UTILIZE A CORD WITH EXPOSED INNERWIRES OR INSULATION MATERIAL. DO NOTUTILIZE A CORD THAT HAS BEEN REPAIRED WITHELECTRICAL TAPE. USE OF AN EXTENSION CORDOF IMPROPER STRUCTURAL INTEGRITY CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.


ALL ELECTRICAL WIRING MUST BE INSTALLEDAND/OR APPROVED IN ACCORDANCE TO LOCALELECTRICAL CODES AND PRACTICES. ANIMPROPER WIRING INSTALLATION CAN RESULTIN PROPERTY DAMAGE AND/OR PERSONALINJURY.

5) Determine that the power outlet to be utilized isproperly grounded. This can be accomplished withproper testing equipment and procedures. If there areany questions regarding the suitability of a specificpower outlet, contact the Customer ServiceDepartment for assistance BEFORE utilizing theSurface Grinder. There is no charge for this service. Aqualified electrician can also be consulted. If a 115 VACpower outlet is selected, it is recommended that aproperly tested, externally mounted, ground fault circuitinterrupter (GFCI) be utilized at all times as anadditional safety precaution. Ground fault circuitinterrupters are not available for operation on 230 VAC,FIGURE 34.

FIGURE 34

FOR MAXIMUM PROTECTION AGAINST A FAULT,ALWAYS CONFIGURE THE GROUND FAULTCIRCUIT INTERRUPTER TO BE PLUGGED INTOTHE EXTENSION CORD. A CONFIGURATION WITHTHE GROUND FAULT CIRCUIT INTERRUPTERPLACED BETWEEN THE POWER SOURCE ANDTHE EXTENSION CORD WILL NOT AFFORDMAXIMUM PROTECTION AGAINST A POTENTIALFAULT.

6) Couple the NEMA 6-20R receptacle and the NEMA6-20P plug together.

7) Grasp the operator handle with firm gripping. Whenstarting the electric motor, apply a down force directlyto the operator handle to help reduce the amount ofmachine weight against the work surface. Turn theON/OFF switch to the ON position. Reduce the amountof applied down force on the operator handle as theelectric motor attains its operational speed.

When operating on 115 VAC, the electric motor willrequire additional starting time to help compensate forthe additional starting amperage requirement. Thistime is usually within two seconds of activating theON/OFF switch.

8) The SG24/E Series electrically powered SurfaceGrinder is not equipped with a centrifugal clutchassembly. The electric motor is directly coupled to themulti-accessory discs by a V-belt/spur geartransmission.

AS SOON AS THE ELECTRIC MOTOR HASSTARTED, THE OPERATOR MUST BE IN APOSITION TO ASSUME DIRECT AND FULLCONTROL OF THE SURFACE GRINDER. FAILURETO ASSUME DIRECT AND FULL CONTROL CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

9) The SG24/E Series electrically powered SurfaceGrinder is stopped by moving the ON/OFF switchlocated on the operator handle to the OFF position. Forsafety considerations, it is also recommended that theextension cord be disconnected from both the SurfaceGrinder and electric power source whenever theSurface Grinder is not in use on the job site.

STARTING THE SG24/G SERIES GASOLINEPOWERED SURFACE GRINDER ON THE JOB SITE.


2) Refer to the material supplied by the enginemanufacturer for the correct starting, operation andstopping procedures.


3) The SG24/G Series Surface Grinder is equippedwith a centrifugal clutch assembly. The clutch isdesigned to engage at approximately 2400 RPMengine speed. Normal operation of the clutch will allowthe engine to operate at its designated idle speedwithout the multi-accessory discs rotating. If the multi-accessory discs rotate below the designated engineidle speed, do not continue to operate the SurfaceGrinder until the problem has been properly corrected.Consult the Customer Service Department for specificinformation. There is no charge for this service.

AS SOON AS THE CENTRIFUGAL CLUTCHASSEMBLY BECOMES ENGAGED, THE OPERATORMUST BE IN A POSITION TO ASSUME DIRECT ANDFULL CONTROL OF THE SURFACE GRINDER.FAILURE TO ASSUME DIRECT AND FULLCONTROL CAN RESULT IN PROPERTY DAMAGEAND/OR PERSONAL INJURY.

DO NOT OPERATE A GASOLINE ENGINE INCLOSED SPACES WITHOUT PROPERVENTILATION. GASOLINE ENGINES PRODUCECARBON MONOXIDE FUMES. BREATHINGCARBON MONOXIDE FUMES CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.EXCESSIVE LEVELS OF CARBON MONOXIDE CANCAUSE DEATH.

4) Stop the engine in accordance with the instructionsas described in the material supplied by the enginemanufacturer.

PROCEDURES FOR THE SAFE HANDLING OFPROPANE.

PROPANE IS AN EXPLOSIVE GAS THAT CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY IF IMPROPERLYTRANSPORTED, HANDLED AND UTILIZED. DONOT SMOKE OR INTRODUCE AN OPEN FLAME IN

THE VICINITY OF A PROPANE CYLINDER OR THESURFACE GRINDER AT ANY TIME. CONSULTAPPLICABLE DEPARTMENT OFTRANSPORTATION AND OSHA REGULATIONSPERTAINING TO THE USE OF PROPANE ANDPROPANE CONVERTED EQUIPMENT.

1) PERFORM ALL SERVICE WORK ON THESURFACE GRINDER IN AN OPEN OR WELLVENTILATED AREA. NEVER ALLOW PROPANEGAS TO ESCAPE IN A CLOSED AREA. PROPANEIS HEAVIER THAN STANDARD AIR AND MAYSETTLE IN LOW AREAS.

2) NEVER PERFORM ANY CUTTING, WELDING ORREPAIR PROCESS THAT INTRODUCES AN OPENFLAME AND/OR SPARKS IN THE VICINITY OF THEPROPANE CONVERSION SYSTEM.

3) HANDLE THE PROPANE CYLINDERCAREFULLY. DO NOT DRAG OR DROP THECYLINDER. SUCH ACTION CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.

4) INSTALLATION, MAINTENANCE AND REPAIRWORK SHOULD BE ACCOMPLISHED BYQUALIFIED SERVICE PERSONNEL.

5) NEVER TEST FOR SYSTEM LEAKS WITH ANOPEN FLAME. ALWAYS USE SOAP SUDS OR ANAPPROVED LEAK DETECTOR.

6) DO NOT FILL A CYLINDER THAT IS NOTPROPERLY LABELED FOR USE WITH PROPANE.

7) DO NOT FILL A CYLINDER THAT DOES NOTHAVE A CURRENT AND/OR VALID HYDROTESTDATE PROPERLY STAMPED ON ITS SURFACE.

EXAMPLE OF A PROPANE EMERGENCY PLAN.

Operators of the SG24/GHP Surface Grinder areadvised to design and implement a Propaneemergency plan in the event that the Propane cylinder,hoses, connections or engine conversion componentsdevelop leaks which allow the Propane to escape intothe atmosphere. Propane is an extremely flammablegas that can cause property damage and personalinjury.


THE FOLLOWING INFORMATION IS INTENDED TOPROVIDE A BASIS FOR A PLAN AND IS NOTINTENDED TO BE ALL INCLUSIVE. THE KEYWORDS WILL BE ARRANGED TO SPELL OUT THEWORD PROPANE.

1) PROPANE EMERGENCY. Instruct all personnel toshout out the warning PROPANE EMERGENCY,followed by the location. Example: Propaneemergency, warehouse 2.

2) REPEAT THE CALL. Upon hearing the warning,each personnel should repeat the warning.

3) OFF WITH ALL UTILITIES. Personnel nearest theutilities should pull all main switches and close allrelated valves.

4) PHONE THE FIRE DEPARTMENT. Give thelocation, specific details of the emergency anddirections to the location site. Do not hang up until thefire department has the complete information itrequires. Carbon dioxide and dry chemical fireextinguishers may be used. NEVER UTILIZE CARBONTETRACHLORIDE FIRE EXTINGUISHERS.

5) ALL TOOLS OFF. Immediately turn off all air,hydraulic and electrically powered tools and machines.

6) NO VEHICLES MOVE. No vehicles, even ifelectrically powered are allowed to operate. Shut downall vehicle accessories, including two-way radios.

7) EVACUATE NOW. Have all personnel walk to thenearest exit away from the direction of the emergencyarea.

STARTING THE SG24/GHP PROPANE CONVERTEDSURFACE GRINDER ON THE JOB SITE.


2) Inspect the Propane cylinder, all hoses, fittings andconversion components for visible damage and thepotential for leaks. Leaks can be detected by applyinga soap and water mixture to connections with a nonmetallic (spark proof) brush.

USE OF A METALLIC AND/OR IMPROPER TYPEBRUSH CAN PRODUCE SPARKS. SUCHOCCURRENCE CAN BE THE IGNITION SOURCEOF AN EXPLOSION, RESULTING IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

3) Determine that the Propane cylinder is properlyfastened and secured in the mounting cradle.

AN IMPROPERLY SECURED PROPANE CYLINDERCAN BE THE CAUSE OF DAMAGED/LEAKINGFITTINGS, HOSE AND OTHER COMPONENTS,RESULTING IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

4) Open the Propane cylinder valve.

5) Move the engine throttle control lever to the 1/4 openposition.

6) Propane converted, gasoline engines do not requirethe addition of choke for the starting procedure. Anengine choke control mechanism is not provided on theconverted engine.

7) Depress both the regulator and filter buttons for onesecond, FIGURE 35.

8) Start the engine by pulling on the recoil starterhandle. The engine will normally start within 1 or 2pulls. If the engine fails to start, repeat Steps 7 and 8until starting is accomplished.

9) The SG24/GHP Propane converted Surface Grinderis equipped with a centrifugal clutch assembly. Theclutch is designed to engage at approximately 2400RPM engine speed. Normal operation of the clutch willallow the engine to operate at its designated idle speedwithout the multi-accessory discs rotating. If the multi-accessory discs will not stop rotating at the lowestengine idle speed, do not continue to operate theSurface Grinder. Contact the Customer ServiceDepartment for specific information. There is no chargefor this service.


FIGURE 35

AS SOON AS THE CENTRIFUGAL CLUTCHASSEMBLY BECOMES ENGAGED, THE OPERATORMUST BE IN A POSITION TO ASSUME DIRECT ANDFULL CONTROL OF THE SURFACE GRINDER.FAILURE TO PROPERLY ASSUME DIRECT ANDFULL CONTROL CAN RESULT IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

DO NOT OPERATE A GASOLINE ENGINE INCLOSED SPACES WITHOUT PROPERVENTILATION. GASOLINE ENGINES PRODUCECARBON MONOXIDE FUMES. BREATHINGCARBON MONOXIDE FUMES CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.EXCESSIVE LEVELS OF CARBON MONOXIDE CANCAUSE DEATH.

10) The SG24/GHP Surface Grinder is stopped bymoving the engine throttle control lever to the STOPposition.

11) Close the Propane cylinder valve.

12) Inspect the Propane cylinder, all hoses, fittings andconversion components for visible damage during useand the potential for leaks. Replace any questionablecomponent with a factory approved replacement only.

If the Surface Grinder and/or an individualcomponent/accessory does not appear to befunctioning properly, STOP and do not furtheroperate the Surface Grinder until the propercorrective action has been completed. If there areany questions regarding the proper operation ofthe Surface Grinder, contact the Customer ServiceDepartment BEFORE further utilization. There is nocharge for this service.

COUNTERACTING THE PROPANEREFRIGERATION EFFECT.

The combination of a high Propane flow rate andrelatively small cylinder size (20 lbs.) can produce asudden and drastic reduction in heat output and/orengine stoppage even though a substantial quantity ofPropane remains in the cylinder.

Propane in the cylinder is in a liquid state. It must bevaporized before it can be utilized in the internalcombustion process. But vaporization requires theabsorption of heat energy and the source of thisenergy has an important bearing upon the operation ofthe Surface Grinder.

Since the Propane is enclosed inside the cylinder, thepressure rises. It rises until it reaches a limit for thattemperature. This local pressure, referred to as thevapor pressure, is what delivers the Propane vapor tothe engine. Vapor pressure is a variable entity. Itdecreases as ambient temperature decreases andincreases as ambient temperature increases. If thetemperature of the Propane becomes too low,insufficient pressure will be available to operate theSurface Grinder. This can especially happen if theSurface Grinder is operated in very cold climates.

The problem is that Propane actually cools itself. Thereare two factors that can affect Propane temperature.The first factor is ambient, or the surrounding airtemperature. The second factor has to do with theabsorption of heat energy when liquid Propanevaporizes. As the Propane inside the cylinder begins tovaporize it actually robs or reduces the temperature ofthe Propane that remains. Each pound of Propanerequires 185 BTU just to change states from a liquid toa vapor. The effect is to cool the remaining Propane.


The cooling process is known as the refrigerationeffect. If it continues long enough and proceeds fastenough, the Propane temperature and pressure will fallso low that continued operation of the Surface Grindercan be impossible, even with a full cylinder. Frost oftenforms on the outside of the cylinder as a warning thatexcessive refrigeration is occurring.

Fortunately, the refrigeration effect can becounterbalanced by a flow of heat energy into thecylinder from warmer, ambient air. This occurrence isreferred to as convection heating. It can replace muchof the heat energy lost in the course of vaporizing thePropane, thus effectively slowing the cooling process.In many cases, convection heating works well enoughto effectively counterbalance the refrigeration effect,but there are still a number of external factors that canreduce efficient convection.

The first factor is that the surface area of liquidPropane inside the cylinder decreases with usage. Adecreasing amount of liquid surface area available forconvection heating produces an increase in therefrigeration effect and increased Propane cooling.Let's take the example of a filled cylinder. At first, thePropane temperature drops rapidly as the vaporizingPropane robs the heat energy of the remaining liquidsupply. However, the colder Propane causes heat toflow into the cylinder from the warmer, ambient air. Theprocess remains almost steady state until the heattransfer area (dictated by the amount of liquid Propaneinside the cylinder) is substantially reduced. At thattime, the heat inflow is reduced and accelerates thecooling process of the Propane until the vaporizationrate can no longer be maintained.

Another factor that aggravates the refrigeration effect isincreasing the flow rate. Operating the engine at ahigher speed requires a higher fuel flow rate. Propanecooling is in directly proportional to the vaporizationrate. Many times this rate can not be counteracted byconvection heating. The process drastically reducesthe amount of fuel made available to the engine.

Frost accumulation on the cylinder can also impede theefficiency of heating convection. Use of the SurfaceGrinder in high humidity areas can also create theformation of frost on the cylinder. The high water vaporcontent of humid air comes in direct contact with thecolder exterior surface of the cylinder and locallyfreezes. Frost creates an insulation blanketsurrounding the cylinder that effectively prevents heatenergy transfer or convection heating necessary tocounterbalance the refrigeration effect.

While frost is an enemy, wind actually is an ally. Directexposure to forced convection in the form of windflowing over the cylinder creates a boundary layer. Theboundary layer substantially increases the amount ofconvection heating.

There are several other tips that can be demonstratedto reduce refrigeration effect.

a) Keep the cylinder filled, especially in cold weather.Never allow the Propane level to fall below 1/3 of itsrated capacity.

b) Whenever possible, always store cylinders in a warmstorage area.

c) The Propane conversion kit includes a vaporizer toassist proper flow rates during operation in cold,ambient temperatures.

d) Watch for and avoid the formation of frost on thecylinder. Keep the cylinder fully exposed to thesurrounding ambient air. Do not cover or protect thecylinder so as to become obstructed.

e) Whenever possible, keep the cylinder exposed intothe prevailing wind. This will significantly increase theheat transfer rate and overall utilization time from thecylinder.

OPERATING THE SURFACE GRINDER ON THE JOBSITE.


THE GRINDING PROCESS PRODUCES EXCESSIVENOISE, VIBRATION AND FLYING DEBRIS. ALLOPERATORS AND WORK PERSONNEL IN THEVICINITY OF THE SURFACE GRINDER MUST WEARAPPROPRIATE SAFETY EYE WEAR AND HEARINGPROTECTION DEVICES. OTHER SAFETYAPPAREL AND/OR PROCEDURES, DEEMEDNECESSARY BY SUPERVISORY PERSONNELMUST ALSO BE WORN AND/OR PRACTICED BYALL APPROPRIATE PERSONNEL.


EXERCISE EXTREME CAUTION WHENOPERATING THE SURFACE GRINDER IN THEVICINITY OF DECK INSERTS, PIPES, COLUMNS,OPENINGS, LARGE CRACKS, UTILITY OUTLETSOR ANY OBJECT PROTRUDING FROM THESURFACE. CONTACT WITH SUCH OBJECTS CANLEAD TO LOSS OF MACHINE CONTROL,RESULTING IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

DO NOT OPERATE A GASOLINE ENGINE INCLOSED SPACES WITHOUT PROPERVENTILATION. GASOLINE ENGINES PRODUCECARBON MONOXIDE FUMES. BREATHINGCARBON MONOXIDE FUMES CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.EXCESSIVE LEVELS OF CARBON MONOXIDE CANCAUSE DEATH

1) The Surface Grinder incorporates counterrotatingdiscs for mounting a wide variety of multi-accessoryattachments. The counterrotating action results in a"self propelled" effect that substantially enhancesmachine control and reduces fatigue as long as themulti-accessory attachment does not come in directcontact with a protruding obstruction from the floor.Direct contact with such an obstruction can result inrapid and jerky directional movement of the machine. Inmost operating situations, direct contact with aprotruding obstruction from the floor will result in themulti-accessory attachment becoming dislodged fromthe counterrotating disc. This occurrence is intended toprotect the Surface Grinder from excessive damageand allow the operator to remain in proper control ofthe machine.

ALWAYS MAINTAIN PROPER CONTROL OF THESURFACE GRINDER. IF AN OPERATOR LOOSESCONTROL OF THE MACHINE, A "RUNAWAY"SURFACE GRINDER CAN RESULT IN PROPERTYDAMAGE AND/OR PERSONAL INJURY. BECAUSEOF THE UNIQUE OPERATING CHARACTERISTICSOF THE SURFACE GRINDER, THERE IS NOPROVISION FOR THE ELECTRIC MOTOR/ENGINETO AUTOMATICALLY STOP IF THE OPERATORFAILS TO MAINTAIN PROPER CONTROL.

WHEN OPERATING THE SURFACE GRINDER ONABOVE GROUND FLOOR LEVELS, EXERCISEEXTREME CAUTION TO PREVENT LOSS OFCONTROL THAT COULD ALLOW THE MACHINEAND/OR OPERATOR TO FALL DOWN TO LOWERLEVELS. SUCH AN OCCURRENCE CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.

2) Productivity rates with the various multi-accessoryattachments can be increased with the addition ofexternal weight being applied to the area over thecounterrotating discs, FIGURE 36. Maximum allowableexternal weight is 300 lbs. Exceeding this figure canresult in permanent structural damage to the SurfaceGrinder. Provisions for securing the weight by themeans of strapping or other, appropriate methods isprovided.

FIGURE 36

DO NOT OPERATE THE SURFACE GRINDERWITHOUT ALL EXTERNAL WEIGHT PROPERLYSECURED TO THE MAIN FRAME. A SUDDENCHANGE IN MOVEMENT OR DIRECTION CANALLOW THE UNSECURED WEIGHT TO FALL OFFTHE SURFACE GRINDER, RESULTING IN LOSS OFMACHINE CONTROL, PROPERTY DAMAGEAND/OR PERSONAL INJURY. THIS PROCEDURE ISESPECIALLY IMPORTANT WHEN OPERATING THESURFACE GRINDER ON FLOORS AND/OR


SURFACES ABOVE GROUND LEVEL.

DO NOT OPERATE THE SG24/GHP PROPANECONVERTED SURFACE GRINDER WITH WEIGHTAPPLIED DIRECTLY UPON THE PROPANECYLINDER. PROPERTY DAMAGE AND/ORPERSONAL INJURY CAN RESULT. IF EXTERNALWEIGHT IS REQUIRED, POSITION IT AROUND THECYLINDER AREA AND PROPERLY SECURE ASABOVE, FIGURE 37.

3) Proper operator posture and stance will enhanceoperational safety and overall productivity, FIGURE 38.For most job applications, operate the engine atmaximum, governed speed. Consult the materialsupplied by the engine manufacturer and theSpecifications section for specific information.

FIGURE 37

4) The wide variety of potential work surface materialsalong with the corresponding variety of job siteenvironments, makes it impossible to develop astandardized operating procedure for the SurfaceGrinder. Use of the Surface Grinder will requireconstant trial and error testing until satisfactory resultsare achieved. Experience gained over time andcommon sense will help minimize the amount ofnecessary testing. Many factors will directly affect theoperating parameters and/or techniques utilized for aspecialized job application. Some of these factorsinclude:a) Work surface material yield and tensile values. As ageneral rule, these values will determine materialremoval rate per unit of time. Materials with high yieldand tensile values will characteristically resist/limit

material penetration. For such materials, the acceptedprocedure is to make a number of multiple passes overthe work surface rather than attempt to make a single,deep pass. The net effect is to actually increaseproductivity: more material removed in less time. Otheradded benefits to this technique are decreasedvibration, less operator fatigue and increasedcomponent service life.

FIGURE 38

b) Higher material removal rates can sometimes beachieved by making a series of shallow passes 90degrees to each other to form a waffle like pattern. Thistechnique is especially useful when removing deeperaccumulations of rubber, paint, dirt debris, etc. fromindustrial floors.

5) The grinding process on many work surfacematerials can produce sparks, dust and other foreignparticle contamination.

SPARKS PRODUCED BY THE ACTIONS OF MULTI-ACCESSORY OPTIONS AGAINST THE WORKSURFACE (FOR EXAMPLE: STRIKING ANCHORBOLTS) MAY COME IN CONTACT WITHMATERIALS THAT CAN RESULT IN A FIRE AND/OREXPLOSION. THIS OCCURRENCE CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.

THE CREATION OF DUST AND OTHER FOREIGN


PARTICLE CONTAMINATION FROM THEOPERATIONAL PROCESS CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.FOR SUCH OPERATING CONDITIONS, ALWAYSWEAR A NIOSH/MSHA APPROVED DUST/MISTRESPIRATOR. CONSULT APPLICABLE OSHAREGULATIONS FOR SPECIFIC INFORMATION.

6) Dust and other particle contamination can becontrolled by the following methods:

a) The Surface Grinder is equipped with a 1-1/2, 2 or 3inch outside diameter vacuum tube adaptor located atthe rear of the machine. An industrial type vacuumsystem and front shield assembly can be attached tothe Surface Grinder to remove/control dust and otherparticle contamination from the work surface. A hoseclamp is sometimes required to properly secure thevacuum hose to the vacuum tube, FIGURE 39.

FIGURE 39

ALWAYS UTILIZE A VACUUM SYSTEM DESIGNEDTO OPERATE WITHIN THE SPECIFIC JOB SITEREQUIREMENT. DUST MATERIAL CAN MEETCLASS II OR CLASS III SPECIFICATIONS OF THENATIONAL ELECTRIC CODE® FOR HAZARDOUSLOCATION CLASSIFICATIONS. CONSIDERATIONMUST ALSO BE GIVEN TO THE CREATION OFHAZARDOUS TYPE MATERIALS REQUIRINGSPECIFIC DISPOSAL PROCEDURES. DETERMINETHAT THE VACUUM SYSTEM IS PROPERLYDESIGNED TO OPERATE WITHIN THESEATMOSPHERES. CONSULT CURRENT NATIONALELECTRIC CODE®, OSHA AND ENVIRONMENTAL

PROTECTION AGENCY REGULATIONS FORSPECIFIC INFORMATION.

b) Water/sand slurry mixture applied directly to thework surface can be an effective method of reducingthe effects of grinding and other material removalprocesses. This method can be a productive alternativewhen removing adhesives containing asbestos. Anegative effect of this method is that the water/sandslurry mixture can be classified as a hazardousmaterial, requiring proper disposal procedures.

7) Normal usage of the Surface Grinder will allow thebuild-up and accumulation of work surface materials oninterior surfaces. It is highly recommended that boththe interior and exterior surfaces be properly cleanedafter the completion of each usage.

Failure to properly clean the interior surfaces of theSurface Grinder can result in dried material build-up and accumulation directly affecting bearingservice life.

EXERCISE EXTREME CAUTION WHEN UTILIZINGANY SOLVENT TO REMOVE ACCUMULATEDMATERIALS FROM THE SURFACES OF THEMACHINE AND RELATED COMPONENTS. MANYSOLVENTS ARE FLAMMABLE. DO NOT SMOKE ORINTRODUCE FLAME IN THE WORK AREA.PROVIDE ADEQUATE VENTILATION AND WEARPROPER SAFETY APPAREL.

PROPERLY DISPOSE OF ALL ACCUMULATEDMATERIALS PER OSHA AND ENVIRONMENTALPROTECTION AGENCY CODES ANDREGULATIONS. MANY ACCUMULATEDMATERIALS CAN BE CLASSIFIED ASHAZARDOUS AND REQUIRE PROPER DISPOSALPROCEDURES. CONTACT THE APPLICABLEGOVERNMENT AND/OR PRIVATE AGENCIES FORSPECIFIC INFORMATION.


8) On job applications where the work process createsa considerable amount of loose material, it canbecome almost impossible to determine propermaterial removal depths and the extent of work alreadyaccomplished. The problem can be compounded if avacuum system is not utilized. Loose material shouldbe removed by sweeping or other, appropriateprocesses and the Surface Grinder utilized untilconditions again warrant removing the accumulatedmaterial.

STOPPING THE SG24/E SERIES ELECTRICALLYPOWERED SURFACE GRINDER.

Stopping the Surface Grinder is accomplished bymoving the ON/OFF switch located on the operatorhandle to the OFF position. For safety considerations,it is also recommended that the extension cord bedisconnected from both the Surface Grinder andelectric power source whenever the Surface Grinder isnot in use on the job site.

STOPPING THE SG24/G SERIES GASOLINEPOWERED SURFACE GRINDER.

1) Stopping the Surface Grinder is accomplished bymoving the engine throttle lever to the idle speedposition (depicted by the turtle). Machines powered byHonda engines can then be stopped by further movingthe engine throttle lever until the ignition system isgrounded.

2) Machines powered by other engines may utilize aseparate ON/OFF ignition switch. If so equipped, turnthe switch to the OFF position. Consult the materialsupplied by the engine manufacturer for specificinformation.

STOPPING THE SG24/GHP PROPANE CONVERTEDSURFACE GRINDER

1) Stopping the Surface Grinder is accomplished bymoving the engine throttle control lever to the idlespeed position (depicted by the turtle). Machinespowered by Honda engines can be then stopped byfurther moving the engine throttle control lever until theignition system is grounded. Consult the materialsupplied by the engine manufacturer for specificinformation

2) Turn the Propane cylinder valve to the completelyclosed position.

3) Inspect the Propane cylinder, all hoses, fittings andconversion components for visible damage during use

and the potential for leaks. Replace any questionablecomponent with a factory approved replacement only.

OPERATIONAL PARAMETERS AND TECHNIQUESFOR THE SG24 SERIES SURFACE GRINDER.


Early Age Grinding

Early age grinding is an alternative to floating andtroweling. It gets it name from the fact that the concreteis ground at an early age, after it has set but before ithas gained much structural strength. The processusually involves the following steps:

1) Normal screeding of the floor.

2) Smoothing the floor surface with a skip float.

3) Cover the floor with polyethane sheeting.

4) Removing the sheeting and grinding the floor downa uniform depth of approximately 1/32 inch within 24 to48 hours of the initial pouring.

The C06 and C10 silicon carbide grinding stones areusually used for the process, although the multisegmented, dry diamond blades can be use as analternative with substantially greater productivity rates.The main benefit of early age grinding is that iteliminates late work in cold weather. With ordinaryfinishing methods, a slab cast in the morning of a coldweather day might not get finished troweled until verylate at night. With grinding, the construction crew isable to leave the job at the end of a normal work dayand return 1 or 2 days later to finish the job. Early agegrinding may not reduce the total number of workhours, but it usually eliminates the need for work atovertime rates, which can substantially increase totalproject costs.

One side benefit of early age grinding is that theprocess demands less skill than conventional floatingand troweling. This makes it an attractive processwhere skilled crew personnel may not be available. It isalso an excellent procedure for concrete floors that willbe eventually covered by carpet or an applied coating.

Definitions of Floor Flatness and Levelness

The terms flatness and levelness have poorlyunderstood meanings in everyday speech, but haveimportant distinctions in floor construction.


Flatness is defined as planarity or lack of curvature. Amore simple definition is that a flat floor is smooth andfree of bumps and dips. An unflat floor is bumpy andwavy. Levelness is defined as horizontality or lack ofslope. A level floor is horizontal. A floor that is unlevelis sloped or tilted.

A floor can be flat, but still not level. Some floors arespecifically designed to be unlevel; they can beintentionally sloped for drainage considerations. Veryfew, if any, floors are specifically designed to be unflat.Unfortunately, many turn out that way. Flatness andlevelness are both desirable, but have differentimplications for the floor user. Flatness is critical wherethe user's main concern is the behavior of wheeledtype vehicles. Levelness is critical where the user'smain concern is with fixed structures such as shelving,racks and the placement of machine tools.

Exceptions exist, but for most users, flatness is moreimportant than levelness. The reasoning is that fixedequipment can be shimmed or adjusted tocompensate. However, it is not as easy to adapt awheeled vehicle to a floor that is not flat enough toallow for proper action.

Flatness and levelness also have different implicationsfor the floor contractor. Flatness is determined mainlyby finishing methods. Levelness is determined mainlyby the side forms.

Defined Versus Random Traffic Patterns

Floors are subject to two kinds of traffic patterns:defined and random. On a defined traffic floor, vehiclemovement is confined to fixed paths. On a randomtraffic floor, vehicles are free to roam, though inevitably,some traffic patterns are used more than others.

The distinction is important because the two kinds oftraffic demand different methods of measuring surfaceregularity. On a defined traffic floor, a continuous (ornearly continuous) profile in each of the paths can bemeasured. But where traffic is random, the possibletravel paths are infinite in number. What usually resultsis statistical sampling; selected points or lines arechecked and assumed that they represent the wholefloor surface.

The highest degree of surface regularity is foundamong the defined traffic floors. Defined traffic floorsallow the designer and contractor to focus on a limitednumber of critical areas. When a defined traffic floor isout of tolerance, it is relatively easy to identify thedefects for correction---usually by employing a grinding

process.

How to Define Surface Regularity

Since the middle 1980s, new methods of definingsurface regularity have been adopted as nationalstandards. Older methods will continue to be utilized,although they are less effective. The following methodswill be discussed:

1) The F number system for random traffic floors

2) The TR34 system for defined traffic floors

Both methods are not of equal value. For random trafficfloors, F numbers provide the most complete andconsistent system. For defined traffic floors, the TR34system is superior.

The F number system utilizes a pair of numbers todefine surface regularity. The flatness number, Ff, isbased upon the curvature over a horizontal distance of24 inches. The levelness number, Fl, is based upon thefloor slope over a horizontal distance of 10 feet. Thestandard test for F numbers is specified in ASTME1155 and/or most recent version.

With both Ff and Fl, higher numbers mean greatersurface regularity. Though the scale ranges from zeroto infinity, almost all floors have F numbers between 10and 100 for both flatness and levelness. Since thescale is linear, an Ff50 floor is exactly twice as flat asan Ff25 floor.

Most F number specifications are written in a two tierformat. The overall F numbers apply to the floor takenas a whole. The local F numbers apply to eachindividual slab and are usually only one half to twothirds the overall values.

The overall F numbers are not just simple averages.ASTM E1155 covers how to combine F numbers.

The two tier format encourages contractors to achievegood surface regularity while allowing for minordefects. The attempt is to pour the entire floor to thespecified overall F numbers. If, for instance, theconstruction crew has a bad day and fails to meet thespecified overall numbers for the slab, the slab can stillbe accepted provided it meets the specified localnumbers. Such an occurrence serves as a warning tothe crew that it must strive for a better performance onlater slabs, so as to bring the overall F numbers up tothe specified values. If a slab fails to meet even thespecified local numbers, it must be repaired or


replaced, but such failures seldom occur if all partiesunderstand what is expected from the start.

Designers are not obligated to use this two tier format.Some designers specify a single F number pair (Ff andFl) which applies to each individual slab. But this alsoraises the risk that slabs will be rejected.

FIGURE 40 depicts the overall and minimum Fnumbers for various floor classes. The floorclassification is from the American Concrete Institute.Although the F number system is only a few years old,it offers these advantages:

a) The system controls both flatness and levelness.

b) There is a standard test method.

c) The system recognizes the statistical nature ofprofile testing on random traffic floors.

d) The system is infinitely variable.

FIGURE 40

One of the major limitations of the F number system isthat it does not control the surface regularity at joints.Because joints are statistical anomalies, the standardtest method forbids measurements within 24 inches.The designer specifying by F number has two methodsto accommodate the problem. The first solution is tolocate joints at locations where surface regularity is notimportant. The second solution is to designspecifications for the joints themselves.The TR 34 Tolerances for Defined Traffic Floors

The TR 34 System divides defined traffic floors intothree categories:

a) Superflat

b) Category 1

c) Category 2

For each category, the TR 34 System specifies limitsfor three properties:

Property 1 is the difference in elevation between twopoints 12 inches apart, measured in the direction ofvehicle traffic. This is the levelness tolerance.

Property 2 is the difference in slope over 24 inchesmeasured in the direction of vehicle traffic. This is theflatness tolerance. It is identical as the 24 inchcurvature utilized in the F number system.

Property 3 is the difference in elevation betweenopposite points in the left and right wheel path,measured perpendicular to the direction of vehicletraffic. As with Property 1, it is a levelness tolerance.The TR 34 System specifies different values forProperty 3 depending upon whether the distancebetween left and right wheel paths is more or less than5 nominal feet.

The Superflat category is intended for very narrowaisle warehouses where the highest standards arerequired. Category 1 is suggested for very narrow aislewarehouses where the vertical lift height is between 26and 43 feet. Category 2 is for very narrow aislewarehouses where the vertical lift height is under 26feet and the use of low rise, automatically controlledvehicles. No matter which category of surfaceregularity is specified, it is accomplished by measuringelevations on 12 inch centers. This is very similar to anF number survey, but with an important distinction. Inan F number survey, the elevation profiles are made onthe floor at random. With the TR 34 System, the surveymeasurements are made on the actual paths of thevehicles that will utilize the floor.

Improving the Wear Resistance of Concrete Floorsby Grinding with the SG24 Series Surface Grinder

Poor wear resistance can often be traced back to asurface that is weaker than underlying levels of thepour. This occurrence can result from bad finishingtechniques, improper curing or early freezing.

Where surface weakness is a problem, grinding can bea solution. The process is similar to the early agetechnique. The grinding depth is typically 1/16 to 1/8inch. A large project should not be attempted until asmall test area has proven that the technique willproduce the desired results. Usually only a square yard


of floor is ground with the normal wear tests performed.

Repair costs can be minimized by grinding only thosefloor areas that accommodate traffic. For example, in apallet rack warehouse, it may be necessary to grindonly the aisle areas and not under any of the racks. Thegrinding process can adversely affect the surfaceregularity. Where specific properties are important, itmay be necessary to survey the floor during thegrinding process to ensure that flatness and levelnessspecifications are maintained.

Cleaning Concrete Floors to Improve the WearResistance with the SG24 Series Surface Grinder

Clean concrete floors have a longer service life thandirty, poorly maintained floors. Loose debris producesthree-bodied wear by allowing particles to roll betweenthe traffic and the floor surface. With some types ofdebris, especially when lodged in vehicle wheels, wearcan be immediate and severe.

The SG24 Series Surface Grinder can be utilized witha number of multi accessories to clean and extendconcrete floor service life. The SCRAPE-R-TACH®floor coatings removal system readily removes food, oiland rubber accumulations from high traffic floor areas.The Clean Sweep™ silicon impregnated, rotarybrushes along with a biodegradable detergent appliedto floors removes ground in dirt and debris from shopand industrial floors. Dry diamond segmented discsand blocks can be utilized to remove surfaceimperfections.

Service

PREVENTATIVE MAINTENANCE CHECK LIST.


The normal operation of the Surface Grinder producesextreme dirt and dust, along with levels of randomvibration. Before operating the Surface Grinder, thefollowing service list should be accomplished. This listis for reference only and is not intended to be allinclusive. Other subject areas can be added at thediscretion of the owner(s) and/or operator(s):

1) Check all fasteners for proper torque values. If afastener requires retorquing, consult a torque chart forproper value. Properly discard and replace any wornfastener with a factory approved, replacement partonly.

2) Check the V-belts for wear. Adjust or replace asnecessary. Check pulleys for wear and properalignment. Many loose materials created as a result ofoperating processes can be extremely abrasive.

3) Keep the Surface Grinder clean. Wash the unit aftereach use. Keep loose materials from accumulatingaround engine cooling fins. Determine that the interiorsections of the frame are free of material build-ups.Such build-ups can restrict the operating process andpresent a potential safety hazard. Clean and removeany material build-up from the Surface Grinder aftereach use.

4) Engine service life can be extended with proper aircleaner maintenance. Consult the material supplied bythe engine manufacturer for specific information.

5) Check for proper oil level. Always use clean, highquality engine oil. Change oil as required. Consult thematerial supplied by the engine manufacturer forspecific information.

6) Remove material accumulations from the exteriorsurfaces of the electric motor. The electric motor is atotally enclosed, fan cooled (TEFC) design. Keep thefan fins clear of material accumulations to enhance airflow over the motor exterior for cooling purposes.

DO NOT PERFORM PREVENTATIVEMAINTENANCE CHECKS WITH THE ENGINE ORELECTRIC MOTOR RUNNING. STOP THE POWERSOURCE AND DISCONNECT THE SPARK PLUG OREXTENSION CORD BEFORE PERFORMING ANYMAINTENANCE TO THE SURFACE GRINDER. IF


GASOLINE ENGINE POWERED, RECONNECT THESPARK PLUG BEFORE RESTARTING THE ENGINE.IF ELECTRIC MOTOR EQUIPPED, TURN THEON/OFF SWITCH TO THE OFF POSITION BEFORERECONNECTING THE EXTENSION CORD.IMPROPER PROCEDURES CAN RESULT INPROPERTY DAMAGE AND/OR PERSONAL INJURY.

CHECKING V-BELT TENSION AND ALIGNMENT.


Proper V-belt tension and alignment are essential forsmooth transmission of horsepower and extendedservice life. Improper tension and alignment willaccelerate V-belt wear and contribute to decreasedproductivity. The V-belt is tensioned at the factory withthe maximum recommended tension force. Check thebelt tension at least two times during the first day ofoperation as there will normally be a rapid decrease inbelt tension until it has been run in. Check the belttension every eight hours of operation thereafter andmaintain tension within the recommended range. Thecorrect operating tension for a V-belt drive is the lowesttension at which it will not slip under peak loadconditions.

Tools Required:

1 each, 16 inch minimum length straightedge1 each, 10 lbs minimum capacity, tension scale or belt

tension tool


2) Position the Surface Grinder on a suitable workbench with the V-belts approximately at waist level.

3) Remove the rubber latches and slide the belt guardaway from the engine/electric motor until it clears thecatch mechanism. If the Surface Grinder is equippedwith a Propane converted engine, determine that thePropane cylinder valve is closed before uncoupling thehose. Remove the belt guard from the main frame.Clean the inside of the belt guard with an appropriatesolvent. Check for signs of wear and damage.

Observe all applicable safety precautions for thesolvent.

4) Check the belt tension using the spring scale or belttension tool midway between the engine clutch pulleyand the transmission pulley. Belt tension shouldmeasure approximately 0.22 inch at 3-1/4 to 4-3/8lbs. measured force range, FIGURE 41. If tension iswithin specifications, proceed to Step 5. If tension isnot within specifications, refer to INSTALLING AREPLACEMENT V-BELT for specific information.

FIGURE 41

5) Belt alignment is checked with the straightedge.Place the straightedge squarely against thetransmission pulley. Properly aligned pulleys shouldalso place the straightedge squarely against theengine/motor pulley. Remove the straightedge androtate the engine pulley 120 degrees, FIGURE 42.Recheck alignment with the straightedge. Repeat theprocess until the engine/motor pulley is rotated a full360 degrees. Maximum allowable misalignment is + -1/32 inch. If pulley alignment is not withinspecifications, refer to INSTALLING AREPLACEMENT V-BELT for specific information.

6) Install the belt guard to the main frame. Determinethat all safety related decals affixed to the belt guardare fully readable. If any decal is not fully readable,replace with a factory approved, replacement part only.If the Surface Grinder is equipped with a Propaneconverted engine, properly install the Propane cylinderand recouple the hose.

7) If the Surface Grinder is powered by an engine,reconnect the engine spark plug wire. If powered by anelectric motor and the machine is to be usedimmediately, reconnect the extension cord or Surface


Grinder to the power source. Determine that theON/OFF switch located on the operator handle is in theOFF position.


FIGURE 42

INSTALLING A REPLACEMENT V-BELT,CENTRIFUGAL CLUTCH OR PULLEY.

Application: As Specified

Tools Required:

1 each, 7/16 wrench2 each, 1/2 wrenches1 each, 9/16 wrench1 each, 5/32 Allen wrench1 each, 16 inch minimum length straightedge1 each, 10 lbs minimum capacity, tension scale or belt

tension tool1 each, torque wrench, 35 ft lbs (47 Nm.) capacity with

7/16 inch and 9/16 inch sockets1 each, belt tension tool

Parts Required:

2 each, PN B50 V-belt (if required)1 each, PN SG24-0520 Pulley Assembly (if required)1 each, Pulley Assembly (if required):

PN SG24-0510 (50Hz only)PN SG24-0500 (60Hz only)

1 each, PN SG24-0320 Centrifugal Clutch Assembly (if

required)

1) Position the Surface Grinder on a suitable worksurface with the V-belts approximately at waist level.

2) If the Surface Grinder is equipped with a Propaneconverted engine, determine that the Propane cylindervalve is closed before uncoupling the hose. Removethe rubber latches and slide the belt guard away fromthe engine/electric motor until it clears the catchmechanism. Remove the belt guard from the mainframe. Clean the inside of the belt guard with anappropriate solvent. Check for signs of wear anddamage. Secure in a proper storage area.


3) Using the 1/2 inch wrenches, loosen theengine/motor mounting plate cap screws.

4) With the same wrenches, rotate the engine take-upcap screws counterclockwise to loosen the V-belts andallow the engine/electric motor to slide toward the frontof the main frame, FIGURE 43.

FIGURE 435) Remove the worn V-belts. Inspect the engine/electricmotor and transmission pulleys for wear and damage.Install the replacement belts, PN B50 in pairs. TheSurface Grinder utilizes two V-belts. Always installreplacement belts in matched pairs. Never replace justone of the V-belts.


Do not operate the Surface Grinder with only one V-belt installed. One V-belt is not capable oftransmitting proper horsepower and torque levelsto the multi-accessory discs.

a) Do not install replacement belts if the pulleys haveexcessively worn grooves. Such pulleys should bereplaced to insure proper belt fit. Operating the V-beltsin worn pulley grooves will accelerate wear, reducehorsepower and torque levels and significantly reducecomponent service life.

b) A V-belt should never be forced over a pulley. Morebelts are broken from this cause than from actualfailure in service.

c) Keep the belts as clean and free of foreign materialas possible. Do not use belt dressing.

6) The centrifugal clutch assembly utilized on both thegasoline engine powered and Propane convertedSurface Grinders is designed to deliver an extendedservice while requiring minimal service. However, longterm use of the Surface Grinder can allow theaccumulation of fine dusts and powders within theclutch assembly. These dusts and powders candramatically reduce the capacity of the the clutch drumbearing, resulting in the following operationalcharacteristics:

a) When operating the engine at idle speed, thecentrifugal clutch assembly will not fully disengage,allowing the multi accessory discs to rotate at lowspeed.

b) When the engine is advanced to and/or from the idlespeed position, erratic machine movement or"grinding" and "thrashing" noises from the clutch areaare detected.

In many cases, clutch assembly removal, a cleaning ofthe bearing surfaces, and reassembly will solve theproblem.

7) Rotate the take-up cap screws clockwise until the V-belts have enough tension to not allow them to fall offthe centrifugal clutch and/or pulleys.

8) Using the 9/16 inch wrench, remove the retainingcap screw from the engine crankshaft. Using the 5/32inch Allen wrench, loosen the two set screws located

near the snap ring. The clutch can now be removedfrom the engine crankshaft. FIGURE 44.

9) The centrifugal clutch is comprised of a rotor/shoeassembly, a drum/pulley assembly, a thrust washer andretaining snap ring.

a) Using the snap ring pliers, remove the snap ringfrom the clutch assembly, FIGURE 45.

FIGURE 44

WEAR SAFETY EYEWEAR AND OTHERAPPROPRIATE APPAREL WHEN DISASSEMBLINGTHE CENTRIFUGAL CLUTCH ASSEMBLY.CAUTION ALL ONLOOKERS REGARDING THEPOTENTIAL FOR FLYING DEBRIS. FAILURE TOEXERCISE PROPER SAFETY PRECAUTIONS CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.


FIGURE 45

b) Disassemble the rotor/shoe assembly anddrum/pulley assemblies. Clean each component withan appropriate safety solvent. Pay special attention tothe inside diameter bore of the drum/pulley assemblybearing. Inspect for signs of excessive wear anddamage which can allow the rapid formation of foreignmaterial accumulation, FIGURE 46.

FIGURE 46


c) The clutch rotor springs and shoes are relativelymaintenance free and should deliver many hours oftrouble free operation before complete replacement isrequired. Severely discolored springs and shoes are

signs of excessive clutch slippage caused by improperoperation techniques, FIGURE 47.

FIGURE 47

10) Reassemble the components in reverse order andinstall the clutch assembly on the engine crankshaftwith the pulley facing toward the engine.

11) Reinstall the V-belts to the transmission and clutchpulleys and tighten as outlined in CHECKING V-BELTTENSION AND ALIGNMENT.

REPLACING THE LORD® TYPE ELASTOMERICMOUNTS ON THE MULTI-ACCESSORY DISCS.


Lord® type elastomeric rubber mounts are utilized toallow each multi-accessory disc to maintain full contactwith the work surface. The rubber mounts afford aconstant flex rate for each multi-accessory discthroughout its service life. The rubber compound isresistive to the effects of ultraviolet radiation and mostcommon chemicals encountered when operating theSurface Grinder .

During the manufacturing process, the rubber mountsare pressed into specially machined cavities in the discmounting plates. Under normal usage and jobapplications, the Lord® type rubber mounts will deliverappropriate performance for the expected service lifeof the Surface Grinder. However, an attachmentmounted in the multi-accessory disc that directlystrikes a vertical floor obstruction with sufficient impactforce can cause one or more of the mounts to becomeseparated from the mounting plate. This occurrence willnot allow the multi-accessory disc to maintain fullcontact with the work surface. This occurrence is also


intended to protect the transmission gears andbearings from costly damage and the operator from animpact force that could cause personal injury.

Tools Required:

1 each, 5/16 Allen wrench2 each, 5/8 wrenches1 each, arbor press of sufficient capacity and stability

Parts Required:

PN J-6250-2 Elastomeric Mount (as required)1 container each: PN 80 Installation Lubricant (or approved equivalent)


2) Position the Surface Grinder on a suitable workbench with the multi-accessory discs at waist level.

3) If the Surface Grinder is equipped with a Propaneconverted engine, determine that the Propane cylindervalve is closed before uncoupling the hose. Removethe rubber latches and slide the belt guard away fromthe engine/electric motor until it clears the catchmechanism. Remove the belt guard from the mainframe. Clean the inside of the belt guard with anappropriate safety solvent. Check for signs of wear anddamage. Secure in a proper storage area.


4) Tilt the Surface Grinder back until the operatorhandle comes in contact with the surface. The surfaceGrinder may not be in a stable position in thisconfiguration. To minimize the possibility of propertydamage and/or personal injury, apply an appropriateweight to the handle to stabilize the Surface Grinder,FIGURE 48. Other means can also be utilized tosupport the frame and provide proper machine stability.Appropriate wheel chocks are recommended. Followthe instructions for this procedure as outlined inINSTALLING A MULTI-ACCESSORY ATTACHMENT(not including multi-segmented, dry diamond blades)IN THE COUNTERROTATING DISCS.

5) Utilizing the Allen wrench, remove the affectedaluminum multi-accessory disc (if still attached) fromthe Surface Grinder.

6) Utilizing the 9/16 inch wrenches, remove the capscrews that retain the Lord® rubber mounts to both themounting plate and transmission shaft.

FIGURE 48

7) Inspect the appropriate cavities in the mountingplate for wear and damage. Any nick or burr must beremove by the use of an appropriate file, followed bythe use of 240 grit sandpaper FIGURE 49.

FIGURE 49

8) Apply the installation lubricant to the exterior surfaceof the elastomeric mount to minimize damage whenpressing into the mounting disc. If the factory suppliedlubricant is not available, an acceptable alternative isthe use of common liquid soap.


Do not install an elastomeric mount without theuse of an approved lubricant. Installation withoutan approved lubricant can produce tares in themount, resulting in substandard operationalperformance and service life.

9) Support the elastomeric mount, socket andmounting plate as depicted in FIGURE 50. Themounting plate must be suspended from the arborpress to allow the mount to clear when the pressingprocess is completed. A short section of 1-1/2 inchinside diameter steel tubing can be utilized for thispurpose. Using the arbor press, apply a steady forcein a straightline direction to the mount until it fullypenetrates the cavity in the mounting disc. Do notattempt to push the elastomeric mount through themounting disc with excessive force. Damage to theelastomeric mount will result.

10) Reassemble the mounting discs to thetransmission shaft.

11) Reassemble the mounting plate to the mountingdisc.

12) Reassemble the aluminum multi-accessory disc tothe mounting plate.

13) Check to determine that the replacementelastomeric mounts allow for proper position of thealuminum multi-accessory disc. If the elastomericmounts are not properly positioned, they will requireremoval and reinstallation. The removal process canproduce tares and abrasions in the mount that willrequire a new replacement.

FIGURE 50

LUBRICATION REQUIREMENTS.


Parts Required:

1 each, standard grease gun filled with one of the following: ESSO Beacon 325, Shell Alvania #2, Chevron SRI, or equivalent

1 each, container of dry film lubricant

1) Lubricate the caster wheel bearings with a dry filmlubricant only. Dry film lubricants dry immediately uponcontact. Use sparingly. Excess lubricant will attract thefine grained, powdered materials described anddirectly affect bearing service life.

Do not lubricate the caster wheels with any type ofgrease material. Grease will attract foreign materialaccumulations that can accelerate bearing wear.

2) The transmission gears are supported by extracapacity, ball bearing units. Bearings are lubricated atthe time of manufacture and do not require additionalservicing when placing the unit in initial service. Zerkgrease fittings can promote improper serviceschedules and an excessive amount of overlubrication. Excess grease escaping from around thebearing insert seals will attract foreign materialaccumulations that can drastically shorten seal service life. Excessive amounts of grease in the bearing racecavity can actually increase friction and resulting heatincreases that can also dramatically shorten bearingservice life.

3) The transmission gears are lubricated at the time ofassembly with approximately 24 ounces of LubriplateGR132 grease or equivalent. This lubricant has an EPadditive to better allow it to cling to the gears. Thetransmission should not require additional lubricationor the lubrication to be changed until service work tothe gears is performed.

4) Standard bearing greasing intervals will range fromonce every 8 hour work day to approximately onceevery work week. Always maintain sufficient greasearound the circumference of the bearing insert toprovide its self-aligning feature and prevent theformation of corrosion.

5) Do not apply belt dressing materials to the V-belts for


the purpose of minimizing slippage. These productstypically attract foreign material accumulations that canaccelerate component wear. Excessive V-belt slippagecan be eliminated with proper V-belt tension andalignment.

ELECTRIC MOTOR SERVICE.

Application: SG24/E Series Surface Grinder

The electric motor is capable of operating for manyyears with a reasonably small amount of maintenance.Before attempting to service the motor, disconnect theSurface Grinder from the power source. Clean themotor surfaces periodically, preferably with a vacuumcleaner. Heavy accumulations of dirt and lint will resultin overheating and premature failure of the motor.

The electric motor is equipped with higher capacity ballbearings and under normal service and ambienttemperatures, should not require relubrication for manyyears. If you feel that the motor requires relubrication,contact the local representative of the motormanufacturer for specific information.

The seals utilized with the motor are intended to delivera longer service life in a concrete dust environment.When replacing the seals, utilize only componentsmeeting the original factory specifications.

ENGINE SERVICE.

Application: SG24/G Series and SG24/GHP SurfaceGrinder.

Consult the material supplied by the enginemanufacturer for specific service and maintenanceinformation regarding:

1) muffler2) spark plug3) air filter system 4) carburetor adjustment5) ignition system6) short and long term storage7) maximum governed speed8) emission standards

Keep this information stored with the Operator'sManual for the Surface Grinder so it will always beavailable for use when the engine requires service ormaintenance. A properly maintained engine will addconsiderably to the service life and overall productivityof the Surface Grinder.

Troubleshooting

ELECTRIC MOTOR.

Application: SG24/E Series Surface Grinder.

MOTOR FAILS TO START

ON/OFF switch in the OFF position. Turn the switch tothe ON position.

Improper voltage selection. Determine the availablevoltage value from the power source. Move the voltageselection switch located on the motor to the properselection.

Surface Grinder and/or extension cord is not pluggedinto the power source. Determine that all electricalconnections have been properly made. The NEMA 6-20 Series cap and receptacle set is of a twist lockconfiguration and requires a twist motion to ensure aproper connection.

Improper extension cord size and capacity. Operate theSurface Grinder with copper stranded, 8 AWG or largerextension cords. Improper extension cord size andcapacity will result in significant heat rise andcorresponding voltage and amperage drop.Thermal protection device activated. To protect themotor against heat related damage, an automaticthermal protection switch is provided near the voltageselection switch. High operating temperatures willactivate the switch and shut the motor off. After themotor has cooled to an acceptable temperature level,depress the switch to restart.

MOTOR LOSES POWER

Improper extension cord size and capacity. Replacewith cords meeting the required specifications.

Excessive extension cord length. Even with properextension cord size and capacity, excessive cord lengthcan reduce the available voltage and amperage to themotor. Measure the available voltage to the motorwhere the extension cord connects to the SurfaceGrinder with a voltmeter. Reduce the extension cordlength as required to achieve the minimum voltageoperating specification as required by the motormanufacturer.

Insufficient available voltage and amperage at thepower source. Measure the available voltage at the


power source (usually a receptacle) with a voltmeter. Ifthe available voltage is below the minimum operatingspecification as required by the motor manufacturer,utilize an alternative power source.

Improper motor cooling. See ELECTRIC MOTORSERVICE.

Excessive load to the motor. See OPERATING THESURFACE GRINDER ON THE JOB SITE.

ENGINE.

Application: SG24/G Series and SG24/GHPPropane Converted Surface Grinders

ENGINE FAILS TO START

Ignition switch in OFF or cut off position. Place switchin the ON position or move throttle control lever to theignition operational position.

Incorrect carburetor/fuel ignition system adjustment.See Service section.

Air filter blocked. See Service section.

Ignition wire to spark plug loose or disconnected.Reconnect.

Application: SG24/G Series Surface Grinder

Fuel supply exhausted. Refill the fuel tank.

Application: SG24/GHP Propane ConvertedSurface Grinder

Propane cylinder valve closed. Open valve.

Propane cylinder empty. Refill cylinder.

Spark plug fouled. Replace spark plug.

Improper priming technique. See STARTING THESG24/GHP PROPANE CONVERTED SURFACEGRINDER ON THE JOB SITE.

ENGINE LOSES POWER

Incorrect carburetor/fuel injection adjustment. SeeService section.

Excessive carbon accumulation in combustionchamber. See Service section.

Excessive material build-up around the cooling fins.See Service section.

Application: SG24/G Series and SG24/GHPPropane Converted Surface Grinders

Water in fuel supply. Drain and replace fuel.

Fuel tank breather vent closed (if so equipped). Openvent.

Air filter blocked. See Service section.

Application: SG24/GHP Propane ConvertedSurface Grinder

Propane cylinder valve closed. Open valve.

OPERATIONAL PROBLEMS.


UNEVEN MULTI-ACCESSORY ATTACHMENT WEAR

Incorrect installation of the attachment in the aluminumdisc. See INSTALLING A MULTI-ACCESSORYATTACHMENT ON THE COUNTERROTATING DISCS.

Worn or damaged gimbal head Lord® rubber mounts.Replace mounts.

Accumulation of foreign material on the multi-accessory attachment. Clean and/or replace theattachment components as necessary.

Flails and spacer washers are mounted too tight on thescarifier frame. Remove and/or replace flails andspacer washers. See MULTI-ACCESSORYATTACHMENTS AND APPLICATIONS.

EXCESSIVE JUMPING ON THE WORK SURFACE

Incorrect installation of the attachment in the aluminumcounterrotating disc. See INSTALLING A MULTI-ACCESSORY ATTACHMENT ON THECOUNTERROTATING DISCS.

Worn or damaged gimbal head Lord® rubber mounts.Replace mounts.

Loose gimbal head fasteners. Retorque fasteners asrequired.

ACCELERATED V-BELT WEAR


Misaligned and/or improperly tensioned pulleys.Readjust pulleys and V-belt. See Service section.

Worn pulleys. Replace pulleys as required. SeeINSTALLING A REPLACEMENT V-BELT OR PULLEY.

Improper V-belt. Replace with a name brand B50 seriesV-belt. Never replace a single belt. Always replace bothV-belts at the same time in matched sets. SeeINSTALLING A REPLACEMENT V-BELT OR PULLEY.

ACCELERATED BEARING WEAR AND/OR FAILURE

Misaligned and/or improperly tensioned pulleys.Readjust pulleys and V-belts. See Service section.

Bent transmission input or output shaft. Replaceaffected shaft(s).

Improper lubrication. See LUBRICATIONREQUIREMENTS.

UNEVEN GRINDING ACTION

Excessive material build-up on the caster wheel facesurface. Remove material.Excessive caster wheel bearing wear. Replace thecaster wheel. Excessive axle wear. Replace axle.

Flails and/or spacer washers are mounted too tight onthe scarifier frame. Remove and/or replace flails andspacer washers. See MULTI ACCESSORYATTACHMENTS AND APPLICATIONS.

Mixing new and worn flails, silicon carbide stones, etc.Remove and replace with components of the same,approximate size and diameter. See MULTIACCESSORY ATTACHMENTS AND APPLICATIONS.

Storage


Proper procedure for long term storage of the SurfaceGrinder will protect it against the effects of corrosionand damage. If the Surface Grinder is not to beoperated for a period of 30 days or more, proceed tostore as follows:

1) Clean all accumulated foreign material from theSurface Grinder utilizing an appropriate safety solvent.


2) Follow the procedure as outlined in the materialsupplied by the engine manufacturer describing longterm storage for the engine.

3) Check all visible parts for wear, breakage ordamage. Order any part required to make thenecessary repair. This will avoid a needless delay whenoperating the Surface Grinder at next use.

4) Apply a dry film lubricant to all exposed metalcomponents to prevent the formation of rust.

5) Store the Surface Grinder inside. If the SurfaceGrinder must be stored outside, protect it with asuitable covering.

Specifications

FRAME.

STRUCTURE Unitized, welded steel plate.

DRIVE REDUCTION SYSTEM B50 Series belt/pulley/spur gear

transmission.

MAXIMUM GRINDING WIDTH 24 inches (610 mm).

OVERALL MACHINE WIDTH 27-1/2 inches (699 mm).

OVERALL MACHINE LENGTH 3 inches (1346 mm).


TYPICAL OPERATOR HANDLE HEIGHT 40 inches (1066 mm).

VACUUM CLEANER CONNECTION 1 -1/2 inch(51 mm), 2 inch (51 mm) or

3 inch (76 mm) diameter.

GENERAL.

SG24/E BASIC WEIGHT 250 lbs (114 kg).

SG24/G BASIC WEIGHT 300 lbs (136 kg).

SG24/GHP BASIC WEIGHT 350 lbs (159 kg).

SG24/E ELECTRIC MOTOR 2 hp, 3450 RPM, 16.8amperes @ 115 VAC, 60 Hz, or 8.4 amperes @ 230VAC, 60 Hz, switchable when the motor is not inoperation. The electric motor requires a clean (no otherelectric products on the same circuit) 20 amperecapacity circuit to properly function on 115 VAC, 60 Hzor 10 ampere capacity circuit to properly function on230 VAC, 60 Hz.

SG24/G ENGINE 11 hp (82 kw) nominal, industrialquality, 4 cycle engine, 3450 RPM nominal maximumgoverned speed.

SG24/GHP ENGINE 11 hp (82 kw) nominal, industrialquality, 4 cycle engine, 3450 RPM nominal maximumgoverned speed, converted for use with Propane. TheBTU content of Propane reduces the effectivehorsepower by approximately 20 per cent.



Left Blank


Service Parts SectionSG24 Series Surface Grinder


Gearbox AssemblySG24 Series Surface Grinder


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

123456789101112131415161718192021222324252627282930313233

SG24-0010SG24-0020FHSF205-16G16060000180600001505060016050000SG24-00305160-98

SG24-005063041500SG24-00601712000059120001SG24-0070SG24-0080SG24-0100SG24-02802BK120HHX1

1504060063041000B50

SG24-0210SG24-02202704050035R2633

SG24-0040SP8-5030SP8-5050SP8-5040SG24-5010

Frame, MainCover, TransmissionBearing, Flange

Washer, Lock, 3/8”, PlatedNut, Hexagon, 3/8-16 UNC, Plated

Screw, Cap, 5/16-18 UNC x 3/4”, Plated, Grade 5Washer, Lock, 5/16”, Plated

ShaftRing, SnapSpacer, Long

Key, Square, 1/4” x 1/4” x 1-7/8”Gear

Washer, Flat, 3/4”, PlatedNut, Hexagon, Jam, Nylock®, 3/4-16 UNF

ShaftSpacer, Medium

GearPin, Double Roll, 1/4” x 1-3/4”

PulleyBushing, Tapered

Screw, Cap, 1/4-20 UNC x 3/4”, Plated, Grade 5Key, Square, 1/4” x 1/4” x 1-1/4”

Belt, V TypeCover, V-Belt

Bumper, RubberScrew, Cap, Countersunk, 1/4-20 UNC x 5/8”

Fastener, CoverPlug, Hole

Spacer, ShortDecal, WarningDecal, WarningDecal, WarningDecal, General

1162424121222322221111112121192422211




[Used Starting With Serial Number 25853]


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

1234567891011121314151617181920212223242526272829303132333435363738394041

42

SG24-0010SG24-0020FHSF205-16G16060000180600001505060016050000SG24-00305160-98

SG24-005063041500SG24-00601712000059120001SG24-0070SG24-0080SG24-0100SG24-02802BK120HHX1

1504060063041000B50

SG24-0210SG24-02202704050035R2633

SG24-0040SP8-5030SP8-5050SP8-5040SG24-5010SG24-033015043200SP8-0590SG12-01201804000016040000SG12-0130SG24-0410

SP8-5061

Frame, MainCover, TransmissionBearing, Flange

Washer, Lock, 3/8”, PlatedNut, Hexagon, 3/8-16 UNC, Plated

Screw, Cap, 5/16-18 UNC x 3/4”, Plated, Grade 5Washer, Lock, 5/16”, Plated

ShaftRing, SnapSpacer, Long

Key, Square, 1/4” x 1/4” x 1-7/8”Gear

Washer, Flat, 3/4”, PlatedNut, Hexagon, Jam, Nylock®, 3/4-16 UNF

ShaftSpacer, Medium

GearPin, Double Roll

PulleyBushing, Tapered

Screw, Cap, 1/4-20 UNC x 3/4”, Plated, Grade 5Key, Square, 1/4” x 1/4” x 1-1/4”

Belt, V TypeCover, V-Belt

Bumper, RubberScrew, Cap, Countersunk, 1/4-20 UNC x 5/8”

Fastener, CoverPlug, Hole

Spacer, ShortDecal, WarningDecal, WarningDecal, WarningDecal, GeneralManifold Block

Screw, Cap, 1/4-20 UNC x 4”, Plated, Grade 5Grease Fitting, Straight, 1/8 NPTConnector, Grease, 1/8 NPT

Nut, Hexagon, 1/4-20 UNC, PlatedWasher, Lock, 1/4”, Plated

Connector, GreaseHose, Grease Line

(Cut To Length Required, See Diagram Page)Decal, Grease

11624241212223222211111121211924222111226226REF

1


[Used Starting With Serial Number 25853]


Multi-Accessory Disc AssemblySG24 Series Surface Grinders


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345678910

SG24-0140SG24-0150SG24-0130SG24-0120J-6250-2A15071600530700002707180060061200

SG24-0120-A

Disc, Multi-Accessory, LHDisc, Multi-Accessory, RH

Bar, MountingDisc, Mounting

Mount, Rubber, Lord® TypeScrew, Cap, 7/16-14 UNC x 2”, Plated, Grade 5Nut, Hexagon, Locking, 7/16-14 UNC, PlatedScrew, Countersunk, 7/16-14 UNC x 2-1/4”Screw, Socket, 3/8-16 UNC x 1-1/2”, Plated

Disc. Mounting Assembly(Included Qty 6 of J-6250-2 and Qty 1 of SG24-0120)

112212612682

Multi-Accessory Disc AssemblySG24 Series Surface Grinders


Axle Cradle AssemblySG24 Series Surface Grinder


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

123456789101112

SG24-0190SG24-0260SG24-020020031200171200001810000017100000FF-838-162121200170800001608000015081000

Arm, SwingWheel

Axle, PlatedPin, Roll, 3/16” x 1-1/2”Washer, Flat, 3/4”, Plated

Nut, Hexagon, 5/8-11 UNC, PlatedWasher, Flat, 5/8”, Plated

Bearing, Oilite®Bolt, Shoulder, 3/4-10 UNC x 1-1/2”

Washer, Flat, 1/2”, PlatedWasher, Lock, 1/2”, Plated

Screw, Cap, 1/2-13 UNC x 1-1/4”, Plated

221422222222

Axle Cradle AssemblySG24 Series Surface Grinder


Operator Handle AssemblySG24/G Series Surface Grinder[Equipped With Gasoline Engine]


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345678910111213

SG24-0160SG24-0170600305001508120018080000530300001708000016080000

SG24-0170-020SG24-0170-030SG24-5020SG24-5040KIC-172

Handle, OperatorLever, Throttle Control, With Cable and KnobScrew, Socket, #10-24 UNC x 5/8”, Plated

Screw, Cap, 1/2-13 UNC x 1-1/2”, Plated, Grade 5Nut, Hexagon, 1/2-13 UNC, Plated

Nut, Hexagon, Nylock®, #10-24 UNC, PlatedWasher, Flat, 1/2”, PlatedWasher, Lock, 1/2”, PlatedCable, Throttle, CompleteKnob, Throttle, Control

Decal, ThrottleSign, Quik-TipsRing, Kick-Out

1122224411112

Handle AssemblySG24/G Series Surface Grinder[Equipped With Gasoline Engine]


Engine Mounting AssemblySG24/G Series Surface Grinder[Equipped With Gasoline Engine]


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

1234567891011121314151617181920

GXV340SG24-0110SG24-0320SG24-0315SG24-0300630420003105050017070000160700001507120015051400170500001605000018050000150508011806000017060000CS8-047016060000SG24-0317

Engine, HondaMount, Gasoline Engine

Clutch, Centrifugal, With Pulley, CompleteAdapter, M20 x 7/8-14 UNF

Cap, 37° Flare, Female, DrilledKey, Square, 1/4” x 1/4” x 2-1/2”

Screw, Set, Cup Point, 5/16-18 UNC x 5/16”Washer, Flat, 7/16”, PlatedWasher, Lock, 7/16”, Plated

Screw, Cap, 7/16-14 UNC x 1-1/2”, Plated, Grade 5Screw, Cap, 5/16-18 UNC x 1-3/4”, Plated, Grade 5


Nut, Hexagon, 5/16-18 UNC, PlatedScrew, Cap, 5/16-24 UNF x 1”, Plated, Grade 5

Nut, Hexagon, 3/8-16 UNC, PlatedWasher, Flat, 3/8”, Plated

Screw, Cap, 3/8-16 UNC x 3-1/2”, Full Thread, PlatedWasher, Lock, 3/8”, Plated

Seal, Adapter

11111121112232266241

Engine Mounting AssemblySG24/G Series Surface Grinder[Equipped With Gasoline Engine]


Operator Handle AssemblySG24/E And SG24/E3HP Series Surface Grinders

[Equipped With Electric Motor]


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345

6789101112131415161718

19

20

21

22

23242526

SG24-0160HUB-1390SP8/E-0100SG24-0090HUB-2321

SG24/E3HP-0020CG-5050CWV-100737030400160400001804000016030000180300001504040017080000160800001808000015081200801

HUB-1222SG24/E3HP-0450SG24/E3HP-0460

HUB-2323SG24/E3HP-0010

53030000

60030500

SG24-039086060000

SG24/E-5040KIC-172

Handle, OperatorHousing, Switch (Used On SG24/E only)

CableCable

Plug, Male (2 hp Motor Only)Plug, Male (3 hp Motor Only)

Relief, Strain (Used On SG24/E only)Clamp, Cable

Screw, Pan Head, #10-32 UNF x 1/2”, PlatedWasher, Lock, 1/4”, Plated

Nut, Hexagon, 1/4-20 UNC, PlatedWasher, Lock, Number 10, PlatedNut, Hexagon, 10-32 UNF, Plated

Screw, Cap, 1/4-20 UNC x 1/2”, Plated, Grade 5Washer, Flat, 1/2”, PlatedWasher, Lock, 1/2”, Plated

Nut, hexagon, 1/2-13 UNC, PlatedScrew, Cap, 1/2-13 UNC x 1-1/2”, Plated, Grade 5Nut, Bulkhead (Included With Reference Number 6)

(Used On SG24/E only)Switch

(Used On SG24/E)(Used On SG24/E3HP50 only)(Used On SG24/EHP60 only)

Receptacle, Female(Used On SG24/E only)

(Used On SG24/E3HP50 and SG24/E3HP60)Nut, Hexagon, Nylock®, #10-24 UNC, Plated(Used On SG24/E3HP50 and SG24/E3HP60)Screw, Socket Head, #10-24 UNC, Plated

(Used On SG24/E3HP50 and SG24/E3HP60)Guard, Switch

Nut, Hexagon, Flange, 3/8-16 UNC, PlatedSign, Quik-TipsRing, Kick-Out

111111222222224422

Ref.

111

112

2

1412

Operator Handle AssemblySG24/E And SG24/E3HP Series Surface Grinders



Electric Motor Mounting AssemblySG24/E And SG24/E3HPSeries Surface Grinder



ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12

3

45678910111213141516

1718

SG24-0250121173.00

121360.00

SG24-0500

SG24-0510

63031600CG-315015050800170500001605000018050000CS8-047031050500801

170600001606000018060000002922

SP8-5070SP8/E5HP-5020

Mount, Electric, MotorMotor, Electric, 2 HP, 115/230 VAC

(Used On SG24/E Only)Motor, Electric, 3 HP, 230 VAC, 50/60 HZ

(Used On SG24/E3HP50 and SG24/E3HP60 Only)Pulley

(Used On SG24/E & SG24/E3HP 60 HZ Only)Pulley

(Used On SG24/E3HP 50 HZ Only)Key, Square, 3/16” x 3/16” x 2”

Relief, StrainScrew, Cap, 5/16-18 UNC x 1”, Plated


Nut, Hexagon, 5/16-18 UNC, PlatedScrew, Cap, 3/8-16 UNC x 3-1/2, Full Thread, Plated

Screw, Set, Cup Point, 5/16-18 UNC x 5/16”Nut, Bulkhead (Included With Reference Number 6)


Nut, Hexagon, 3/8-16 UNC, PlatedSwitch, Toggle, 115/230 VAC Selection

(Used On SG24/E Only)Decal, Warning (Used On SG24/E Only)

Decal, Warning (Used On SG24/E3HP50 and SG24/E3HP60 Only)

11

1

1

1

11666621Ref.6461

11

Electric Motor Mounting AssemblySG24/E And SG24/E3HPSeries Surface Grinder



Propane Conversion AssemblySG24/GHP Series Surface Grinder

[Equipped With Propane Converted Engine]


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345678910111213141516171819202122232425262728293031

5550TB-4

SG24-0210SG24-02907141M7141F149F-6-44401-6SFC321-063865HC834615040500VFF30-2-417060000TB-2-60160600001806000036060800SB-200-265610000033SBAF4-6611SB

2247-4-4S501-123T60-G506-0092F-2562F-158650-002

SG24-5060

Cylinder, PropaneBracket, Mounting, Propane Cylinder

Cover, V-BeltBracket, Mounting, Propane Valves

AdapterConnecterFitting, 90°

Fitting, HP StraightHose

Valve, ReliefFitting

Screw, Cap, 1/4-20 UNC x 5/8”, Plated, Grade 5Fuelock, Filter, VacuumWasher, Flat, 3/8”, Plated

ToggleWasher, Lock 3/8”, Plated

Nut, Hexagon, 3/8-16 UNC, PlatedScrew, Truss Head, 3/8-16 UNC x 1”, Plated

GrommetClamp, Hose, 5/8”Nipple, Hose

Backcheck, VacuumNipple, Hose

ElbowHose, Fuel

Regulator, FuelHose, Vacuum

SpudFitting

Cap, VacuumDecal, Propane Starting Instruction

1111112111141216641211111111121

Propane Conversion AssemblySG24/GHP Series Surface Grinder

[Equipped With Propane Converted Engine]


Replacement Parts Diagram/InstallationSafety And Dust Shield Assembly SG24 Series Surface Grinder


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

1234567891011

SG24-0230SG24-03504904000027040800150507001504070053050000SG24-0220SG24-0370SG24-038056480000

Skirt, GrinderSkirt, Assembly

Washer, Fender 1/4”Screw, Countersunk 1/4-20 UNC x 1”, PlatedScrew, CAP 5/16-18 UNC x 7/8”, PlatedScrew, CAP 1/4-20 UNC x 7/8”, PlatedNut, Hex 5/16-18 UNC, Nylock®, Plated

Bumper, RubberStrap, SupportHose, VacuumClamp, Hose

11294241212

Replacement Parts Diagram/InstallationSafety And Dust Shield Assembly SG24 Series Surface Grinder

NOTE:

1) Optional installation: Install Skirt (item 1) with either (9) countersunk cap screws (item 4) and reinstall Bumper (item 8) or with (9) washers (item 3) and (9) hex head cap screws (item 6)

2) Install Hose (item 10) to 3” OD tube welded to Grinder and to tube on Skirt (item 2) with hose clamps (items 11)


Lubrication DiagramSG24 Series Surface Grinder

Top of the SG24Dual head Surface Grinder

Bottom of the SG24Dual head Surface Grinder


Cutter Assembly SCRAPE-R-TACH ®

Coating Removal SystemSG24 Series Surface Grinders

Scarifier AssemblySG24 Series Surface Grinders


Cutter Assembly SCRAPE-R-TACH ®

Coating Removal SystemSG24 Series Surface Grinders

ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

7891011121314151617

SG24-180053050000870520001804000016040000

SG24-1900-010SG24-1900-020J-2005-2A

SG24-1900-040SG24-1900-03027041000

Wedge, PlasticNut, Hexagon, 5/16-18 UNC, Nylock®, Plated

Bolt, Carriage, 5/16-18 UNC x 2-1/2”, Plated, Grade 5Net, Hexagon, 1/4-20 UNC, Plated

Washer, Lock, 1/4, PlatedHousing

Holder, InsertMount, Rubber

SpacerInsert, Tungsten Carbide

Screw, Countersunk, 1/4-20 UNC x 1-1/4”

11122111222

Scarifier AssemblySG24 Series Surface Grinders

ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345

67

SG24-1900-012SG24-1600-02087052000SG24-4000SP8-3000SP8-3100SP8-320053050000SG24-1800

HousingBushing

Bolt, carriage, 5/16-18 UNC x 2 1/2” UNC, Plated, Grade 5Washer, Flat, 5/8”, Heat Treated, Plated

Flail, Star, Heat Treated SteelFlail, Beam, Heat Treated SteelFlail, Pentagonal, Carbide Tipped

Nut, Hexagon, 5/16-18 UNC, Nylock®, PlatedWedge, Plastic

*QTY(12) Required with SP8-3000 and SP8-3100, Flails*QTY(8) Required with SP8-3200 Flails

**QTY(12) Required with SP8-3000 and SP8-3100, Flails**QTY(8) Required with SP8-3200 Flails

122*******21


Grinding Block Assembly DIAM-A-TACH ®

Diamond Grinding SystemSG24 Series Surface Grinders


ReferenceNumber

PARTNUMBER

DESCRIPTION QTY

12345

SG24-2101-010SG24-2101-03083040900SG24-1800

SG24-2100-020

SG24-2101-020

SG24-2102-020

SG24-2103-020

SG24-2104-020

Block“O” Ring

Pin, Retaining (Stainless Steel)Wedge, Plastic

Pin, Diamond, Purple Identification Color(40-50 Grit, For Aggress Grinding Use)Pin, Diamond, Yellow Identification Color(40-50 Grit, For General Purpose Use)Pin, Diamond, Black Identification Color

(40-50 Grit, For Epoxy Morta and Ashpalt Use)Pin, Diamond, Green Identification Color

(40-50 Grit, For Green Conrete And Asphalt Use)Pin, Diamond, Red Identification Color

(40-50 Grit, For Final Grinding/Polishing Use)

13313

3

3

3

3

Grinding Block Assembly DIAM-A-TACH ®

Diamond Grinding SystemSG24 Series Surface Grinders

OPERATOR MANUALsg24 grinder form gom3259601, version 1.2, authorization: dvr, page: 6 surface...

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Transcript of OPERATOR MANUALsg24 grinder form gom3259601, version 1.2, authorization: dvr, page: 6 surface...