MD-3-2 Type TW+CO Wheels

8/13/2019 MD-3-2 Type TW+CO Wheels

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Rev. Date 11/10/99 Bulletin MD-3-2

GENERAL

This service bulletin provides the necessary informationto inspect, lubricate, and repair the wheel assemblies.Inspection and lubrication are covered under themaintenance topic followed by the repair instructionscovered under the topic, Wheel Assembly Repair.

Wheel assemblies are available in sizes from 9 to 30

inches. These wheels are utilized in both bridge andtrolley drive and idler wheel applications.

MAINTENANCE

General

The following topics cover the general inspection whichshould be periodically performed on wheel assemblies.Lubrication information, specifications, and bolt torquesare also provided under this topic.

InspectionPeriodic inspections of the wheel assemblies arerecommended to ensure proper operation andlubrication. The frequency of the inspection depends onthe operating environment of the wheel assemblies.Inspection of the wheel assemblies should include, butnot necessarily be limited to, the following:

Perform inspection as follows:

1. Move the crane to a suitable area away frommachinery and personnel when inspection can bepreformed.

! DANGERWARNING

Electrical current can cause injury or death.Disconnect, lockout and tag the power

source which feeds the crane or equipmentto prevent power from being applied to the

machinery while inspection or repairs are

being performed.

2. Disconnect, lockout and tag the power sourcewhich feeds the equipment being worked upon.

3. Check for loose, damaged or missing hardwareRep lace damaged or m iss ing hardwareimmediately. Tighten loose hardware to the prope

torque as listed under the repair topic.4. Inspect the wheel flanges for wear and signs of the

flange rubbing against the rail.

5. Inspect the wheel for flat spots and any unusuawear patterns or markings.

6. Inspect the wheel bearings for improper lubricationor excessive wear.

7. Inspect the wheel for excessive float.

NOTICE

Wheel float is the amount the wheel movesacross the rail from flange to flange. Wheel floatis approximately 3/4 to 1 inch for straightwheels, and 1-1/4 to 1-1/2 inches for taperedwheels.

If any of the above conditions exist, repair or replace thedamaged parts as described under the repair topic.

Lubrication

Lubr icat ion of the wheel bear ings is requiredperiodically. The amount and frequency of lubrication

will depend on the operating environment of the wheeassemblies. However it is recommended that lubricationperiods never exceed three months.

The bearing housings on each side of the wheeassemblies are provided with a lube fitting to allowapplication of grease to the wheel bearings. Applymultipurpose grease to each lube fitting at three monthintervals, or shorter periods if usage dictates the need

Bulletin MD-3-2

Type TW & CO Wheel Assemblies


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Revised 11/10/99

2 Type TW & CO Wheel Assemblies

P&HSPEC. NO.

AMBIENTRANGE

MILITARYSPEC. NO.

EQUIVALENTLUBRICANTS

MANUFACTURERS

472A(NLGI #0 EP)

*Below - 10F(-12C)

Not Available Conolith EP #0 Continental Oil Company

Lidok EP #9 Exxon Company

Amolith Grease] No. 0 EP Amoco Oil Company

Mobilux EP #0 Mobil Oil Company

Alvania EPRO Shell Oil Company

Prestige 740 EP Sun Company

Multifak EP #0 Texaco, Incorporated

Unoba EP NLGI #0 Union Oil Company of Calif.

Dura-Lith Grease EP #0 Chevron U.S.A., Inc.

Kendall L-406 Kendall Refining Co.

472B(NLGI #1 EP)

*-20 to +40F(-29 to 4C)

Not Available Litholine H EP 1 Arco Petroleum ProductsCompany

Conolith EP #1 Continental Oil Company

Rolubricant 1or Lidok EP#1

Exxon Company (A)

Mobilux EP #1 Mobil Oil Corporation

Alvania EP #1 Shell Oil Company


Multifak EP #1 Texaco, Incorporated

Amolith Grease #1 EP Amoco Oil Company


Dura-Lith Grease EP #1 Chevron U.S.A., Inc.

Gulf Crown Grease EP-1 Gulf Oil Company


Philube EP-1 Phillips Petroleum Co.

472(NLGI #2 EP)

*+20 to 125F(-6 to 52C)

Not Available Litholine H EP 2 Arco Petroleum Products Co.

Conolith EP #2 Continental Oil Company

Rolubricant 2 or Lidok #2 Exxon Company (A)

Mobilux EP #2 Mobil Oil Company

Alvania EP #2 Shell Oil Company


Multifax EP #2 Texaco, Incorporated

Amolith Grease #2 EP Amoco Oil Company


Dura-Lith Grease EP #2 Chevron Oil Company

Gulf Crown Grease EP-2 Gulf Oil Company


Philube EP-2 Phillips Petroleum Co.

*Pumpability tests also required when used in centralized lubrication systems. Consult manufacturer of system.(A) Rolubricant for steel mill applications.

Table 1 Lubrication Specifications

IIssue No. 9, 8-82

P115A


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Morris Material Handling

Bulletin MD-3-2 3

Refer to Table 1 on page 2, Lubricant Specifications, forthe recommended lubricant specifications.

NOTICE

At the time of the printing of this Bulletin, themanufacturers l isted in the lubr icat ion

specification complied with the requirements ofP&H 472. Manufac turers can changelubrication formulations from time to timewithout advising Morris Material Handling. Toprevent any possible conflict obtain currentcopy of P&H lubrication specification to workwith your lubrication supplier to find a productwhich satisfies the speculation for use in thedesired ambient.

NOTICE

There are various types of greases some ofwhich are not compatible with each other.Thickeners such as clay base, polyurea orcalcium may result in incompatibilities. Alwaysconsult your lubricant supplier before changingtypes or brands of greases to prevent possibleproblems.

WHEEL ASSEMBLY REPAIR

General

The repair of the wheel assemblies is limited to the

replacement of worn or damaged components. Refer tothe following procedures for information on the removal,disassembly, cleaning and inspection, assembly, andinstallation of the wheel assemblies.

Removal

The removal and installation procedures outlined in thispublication are general in nature due to the wide rangeof applications in which these wheels are used. Use thefollowing procedure to remove either a drive or an idlerwheel assembly:

NOTICE

The removal and installation the idler wheelassembly is identical to that of the drive wheelassembly with the exception of the removal andinstallation of the drive gear case, and thereforeboth are covered by the same procedure.

1. Move the crane to a suitable maintenance areaaway from personnel and machinery.

! DANGERWARNING

Unexpected crane movement or hazardousvoltage can cause severe injury or death

during maintenance or service. Beforeworking on the wheel assemblies shut down

the operation of the crane, disconnectelectrical power, use lockout and tagout

procedures, and try controls to verify poweris removed

2. Disconnect, lockout and tag the power sourcewhich feeds the equipment being worked upon.

3. Disconnect or remove the drive gear case or lineshaft coupling as necessary, as described undethe applicable procedures outlined in the serviceinstructions specific to the drive gear case.

NOTICE

The drive gear case may not need to beremoved to service the wheel assembly, it mayonly need to be disconnected from the driveaxle. Determine this by visually inspecting thetype of gear case utilized, and the manner inwhich it is connected to the driven wheel.

! DANGERWARNING

Working on overhead crane bridge or trolley

wheels without first blocking the structure

to prevent movement is hazardous, and mayresult in the injury or death of personnel.Install wheel chocks or other blockingdevices at each wheel location prior to

servicing a wheel assembly.

4. Install wheel chocks on the wheel assembliesopposite the wheel being serviced. Secure chocksto the rail to prevent movement of the crane duringthe following procedures.

5. Jack up the end truck or trolley to permit removal othe wheel assembly. Support the end truck or trolleyusing blocking.

6. Remove the capscrews and the lockwashers whichsecure the bearing capsules to the end truck otrolley frame.

7. Using suitable lifting equipment, support the wheeassembly, and pull or pry the bearing capsules ouof engagement with the end truck or trolley frameThis will permit the wheel assembly to be rolled freeof its mounting.


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Figure 1. Idler & Driver Wheel Assemblies


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8. Remove the wheel assembly as a complete unit byrolling it from underneath the end truck or trolleyframe as applicable. If necessary, jack the end truckor trolley as necessary to permit removal.

9. Lower the wheel assembly to the floor and move itto a suitable work area prior to attempting anyrepairs.

Disassembly

GENERAL. Disassembly of these wheel assemblies islimited to the removal of the bearing housings from thewheel and axle assembly. This will permit replacementof the bearings. It does not have seals. The wheel andaxle are sold as independent parts and can be servicedseparately.

DRIVE WHEEL. Use the following procedure tod isassemble the dr ive whee l assembly. Thedisassembly procedure for the idler wheel assembly is

outlined in the following topic (see Figure 1 on page 4,Wheel Assemblies):

1. If necessary, remove key (14) from its slot in driveaxle (13).

2. Pull bearing housings (02 and 15) with bearings(03) from drive axle (13).

3. Remove bearings (03) from bearing housings (02and 15).

4. Remove spacers (04) from drive axle (13).

5. If grease fitting (01) is damaged, remove it from

bearing housing (02 or 15), and replace it with anew fitting.

6. If necessary, press wheel (11) from drive axle (13)using a suitable press. Make sure that key (12) doesnot get lost when the drive axle clears the wheel.

IDLER WHEEL. Use the following procedure todisassemble the idler wheel assembly (see Figure 1,Wheel Assemblies):

1. Pull bearing housings (02) with bearings (03) fromidler axle (09).

2. Remove bearings (03) from bearing housings (02).

3. Remove spacers (04) from idler axle (09).

4. If grease fitting (01) is damaged, remove it frombearing housing (02), and replace it with a newfitting.

5. If necessary, press wheel (10) off idler axle (09)using a suitable press.

Cleaning and Inspection

Wear appropriate eye protection when working withcompressed air. Thoroughly wash each part of thewheel assembly in a suitable solvent. Dry each parusing low pressure, filtered, compressed air (15 psmaximum). Do not spin bearings while drying them, asthis will destroy the bearings.

Nicks and burrs on the shaft or the wheel may beremoved by polishing. Remove any nicks caused byhandling using a fine oil stone.

Inspect the bearings for freedom of rotation. If thebearings are excessively worn or do not rotate freelyreplace them with new bearings.

Assembly

GENERAL.

Assembly of the wheel assembly consists of pressingtogether the wheel and axle, if necessary, installing thespacers, installing the bearings into bearing housingsand installing the lube fittings (see Figure 1, WheeAssemblies).

DRIVE WHEEL.

Use the following procedure to assemble the drivewheel assembly (see Figure 1, Wheel Assemblies):

1. Press wheel (11) onto drive axle (13) until the wheeis centered on the raised shoulder of the axle. Makesure that key (12) has been installed in the axle

keyway before pressing the wheel onto the axle.

2. Assemble spacers (04) to axle (13). Position thespacers tightly against the face of the wheel.

3. Assemble bearings (03) into bearing housings (02and 15).

4. Assemble bearing housing (02) with bearing (03) todrive axle (13).

5. Assemble bearing housing (15) with bearing (03) todrive axle (13).

Install the drive wheel assembly as outlined under the

topic, installation.IDLER WHEEL. Use the following procedure toassemble the idler wheel assembly (see Figure 1Wheel Assemblies):

1. Press wheel (10) on to idler axle (09) until the wheeis centered on the raised shoulder of the axle.

2. Assemble spacers (04) to axle (09). Position thespacers tightly against the face of the wheel.


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3. Assemble bearings (03) into bearing housings (02).

4. Assemble bearing housings (02) with bearings (03)to idler axle (09).

Install the drive wheel assembly as outlined under thetopic, installation.

Installation

Use the following procedure to install a drive or idlerwheel assembly:

1. Inspect the mating surfaces of the bearing housingsas well as the end truck or trolley frame making surethat they are free of burrs, dirt, etc.

2. Apply an antisieze compound to the matingsurfaces of the end truck or trolley, and to the matingsurfaces of the bearing housings. This will preventrusting of the wheel mounting surfaces, thusmaking future wheel removal easier.

3. Lift the wheel assembly into position using asuitable hoist.

4. Roll the assembled wheel assembly into positionunderneath the end truck or trolley frame asapplicable.

5. If necessary, jack the wheel assembly up intoposition underneath the end truck or trolley frameas applicable.

6. Slide the bearing capsules into engagement withthe end truck or trolley frame as applicable.

7. Install the lockwashers and the capscrews which

secure the bearing capsules to the end truck ortrolley frame as applicable.

8. Securely, but evenly tighten the capscrews.

9. If a drive wheel is being installed, install the drivegear case as described in the gear case installationinstructions outlined separately from this brochure.

10. Jack up the end truck or trolley off the blocking.Remove the blocking from underneath the end truckor trolley frame.

11. Lubricate the wheel assembly as described underthe lubrication topic.

12. Lower the end truck or trolley onto the rail.

13. Apply power to the crane and operators controls.Test the crane or trolley operation. Check the wheelfor proper alignment and rolling freedom.

MD-3-2 Type TW+CO Wheels

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