Manual U6B60 B

CJuly 20, 1990

OM-01864-OB02

REV. C

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIOGORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

ECopyright by the Gorman-Rupp Company

INSTALLATION, OPERATION,AND MAINTENANCE MANUAL

WITH PARTS LIST

U-SERIES PUMP

MODELS

U6B60---BINCLUDING: /F, /FM

TABLE OF CONTENTS

i

INTRODUCTION PAGE I --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WARNINGS --- SECTION A PAGE A --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION --- SECTION B PAGE B --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Dimensions PAGE B --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PREINSTALLATION INSPECTION PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .POSITIONING PUMP PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lifting PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mounting PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clearance PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SUCTION AND DISCHARGE PIPING PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Materials PAGE B --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Line Configuration PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connections to Pump PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gauges PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SUCTION LINES PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fittings PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Strainers PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sealing PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suction Lines In Sumps PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suction Line Positioning PAGE B --- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DISCHARGE LINES PAGE B --- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Siphoning PAGE B --- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Valves PAGE B --- 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bypass Lines PAGE B --- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AUTOMATIC AIR RELEASE VALVE PAGE B --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Theory of Operation PAGE B --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air Release Valve Installation PAGE B --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ALIGNMENT PAGE B --- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coupled Drives PAGE B --- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V-Belt Drives PAGE B --- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION --- SECTION C PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PRIMING PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STARTING PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rotation PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OPERATION PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lines With a Bypass PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lines Without a Bypass PAGE C --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Leakage PAGE C --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Liquid Temperature And Overheating PAGE C --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Strainer Check PAGE C --- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pump Vacuum Check PAGE C --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STOPPING PAGE C --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cold Weather Preservation PAGE C --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BEARING TEMPERATURE CHECK PAGE C --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS(continued)

ii

TROUBLESHOOTING --- SECTION D PAGE D --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PREVENTIVE MAINTENANCE PAGE D --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP MAINTENANCE AND REPAIR --- SECTION E PAGE E --- 1. . . . . . . . . . . . . . . .

PERFORMANCE CURVE PAGE E --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PARTS LISTS:

Pump Model PAGE E --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Repair Rotating Assembly PAGE E --- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E --- 6. . . . . . . . . . . . . . . . . . . . . . . . .Back Cover And Wear Plate Removal PAGE E --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suction Check Valve Removal PAGE E --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotating Assembly Removal PAGE E --- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Impeller Removal PAGE E --- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Removal and Disassembly PAGE E --- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shaft and Bearing Removal and Disassembly PAGE E --- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shaft and Bearing Reassembly and Installation PAGE E --- 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Reassembly and Installation PAGE E --- 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Impeller Installation PAGE E --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotating Assembly Installation PAGE E --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suction Check Valve Installation PAGE E --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover Installation PAGE E --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PRESSURE RELIEF VALVE MAINTENANCE PAGE E --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LUBRICATION PAGE E --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seal Assembly PAGE E --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bearings PAGE E --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Power Source PAGE E --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

U SERIES OM--01864--02

PAGE I -- 1INTRODUCTION

INTRODUCTION

This Installation, Operation, and Maintenancemanual is designed to help you achieve the bestperformance and longest life from your Gorman-Rupp pump.

This pump is a U Series, semi---open impeller, self-

priming centrifugal model with a suction checkvalve. It is designed for high-efficiency distributionof liquids containing specified entrained solids.The basic material of construction of wetted partsis cast iron, with ductile iron impeller and alloy steelimpeller shaft.

If there are any questions regarding the pump or its application which are not covered in this manual or inother literature accompanying this unit, please contact your Gorman-Rupp distributor, or write:

The Gorman-Rupp Company or Gorman-Rupp of Canada LimitedP.O. Box 1217 70 Burwell RoadMansfield, Ohio 44901--1217 St. Thomas, Ontario N5P 3R7

For information or technical assistance on the power source, contact the power source manufacturer’s localdealer or representative.

The following are used to alert maintenance personnel to procedures which require special attention, tothose which could damage equipment, and to those which could be dangerous to personnel:

Immediate hazards which WILL result insevere personal injury or death. Theseinstructions describe the procedure re-quired and the injury which will resultfrom failure to follow the procedure.

Hazards or unsafe practices whichCOULD result in severe personal injuryor death. These instructions describethe procedure required and the injurywhich could result from failure to followthe procedure.

Hazards or unsafe practices which COULDresult in minor personal injury or productor property damage. These instructionsdescribe the requirements and the possi-ble damage which could result from failureto follow the procedure.

NOTEInstructions to aid in installation, operation,and

maintenance, or which clarify a procedure.


PAGE A -- 1SAFETY

SAFETY --- SECTION A

These warnings apply to U Series basicpumps. Gorman---Rupp has no controlover or particular knowledge of thepower source which will be used. Referto the manual accompanying the powersource before attempting to begin oper-ation.

Before attempting to open or service thepump:

1. Familiarize yourself with this man-ual.

2. Disconnect or lock out the powersource to ensure that the pump willremain inoperative.

3. Allow the pump to cool if over-heated.

4. Check the temperature beforeopening any covers, plates, orplugs.

5. Close the suction and dischargevalves.

6. Vent the pump slowly and cau-tiously.

7. Drain the pump.

This pump is designed to handle liquidscontaining specified entrained solids.Do not attempt to pump volatile, corro-sive, or flammable materials, or any liq-uids which may damage the pump or en-danger personnel as a result of pumpfailure.

After the pump has been positioned,

make certain that the pump and all pip-ing connections are tight, properly sup-ported and secure before operation.

Do not operate the pump without theguards in place over the rotating parts.Exposed rotating parts can catch cloth-ing, fingers, or tools, causing severe in-jury to personnel.

Do not remove plates, covers, gauges,pipe plugs, or fittings from an over-heated pump. Vapor pressure within thepump can cause parts being disen-gaged to be ejected with great force. al-low the pump to cool before servicing.

Do not operate the pump against aclosed discharge valve for long periodsof time. If operated against a closed dis-charge valve, pump components willdeteriorate, and the liquid could cometo a boil, build pressure, and cause thepump casing to rupture or explode.

Use lifting and moving equipment ingood repair and with adequate capacityto prevent injuries to personnel or dam-age to equipment. Suction and dis-charge hoses and piping must be re-moved from the pump before lifting.

OM--01864--02U SERIES

PAGE B -- 1INSTALLATION

INSTALLATION --- SECTION B

Review all SAFETY information in Section A.

Since pump installations are seldom identical, thissection offers only general recommendations andpractices required to inspect, position, and ar-range the pump and piping.

Most of the information pertains to a standardstatic lift application where the pump is posi-tioned above the free level of liquid to be pumped.

If installed in a flooded suction application wherethe liquid is supplied to the pump under pressure,some of the information such as mounting, line

configuration, and priming must be tailored to thespecific application. Since the pressure suppliedto the pump is critical to performance and safety,be sure to limit the incoming pressure to 50% ofthe maximum permissible operating pressure asshown on the pump performance curve.

For further assistance, contact your Gorman-Ruppdistributor or the Gorman-Rupp Company.

Pump Dimensions

See Figure 1 for the approximate physical dimen-sions of this pump.

OUTLINE DRAWING

U6B60A---B 3.00 2.50 11.52 19.49 31.55

(76,5) (63,5) (292,6) (495,0) (801,4)

DIMEN-SIONSMODEL“A” “B” “

C” “D” “E”U6B60---B 4.50 3.56 13.02 20.96 33.00

(114,3) (90,4) (330,7) (532,4) (838,2)

“A”

“B”

“E”

“C”“D”

NOTE: OPTIONAL ASA OR DIN SUCTION & DISCHARGE SPOOL FLANGES AVAILABLE

Figure 1. Pump Model U6B60-B

OM--01864--02 U SERIES

PAGE B -- 2 INSTALLATION

PREINSTALLATION INSPECTION

The pump assembly was inspected and tested be-fore shipment from the factory. Before installation,inspect the pump for damage which may have oc-curred during shipment. Check as follows:

a. Inspect the pump for cracks, dents, damagedthreads, and other obvious damage.

b. Check for and tighten loose attaching hard-ware. Since gaskets tend to shrink after dry-ing, check for loose hardware at mating sur-faces.

c. Carefully read all warnings and cautions con-tained in this manual or affixed to the pump,and perform all duties indicated. Note the di-rection of rotation indicated on the pump.Check that the pump shaft rotates counter-clockwise when facing the impeller.

Only operate this pump in the direction in-dicated by the arrow on the pump bodyand on the accompanying decal. Refer toROTATION in OPERATION, Section C.

d. Check levels and lubricate as necessary. Re-fer to LUBRICATION in the MAINTENANCEAND REPAIR section of this manual and per-form duties as instructed.

e. If the pump and power source have beenstored for more than 12 months, some of thecomponents or lubricants may have ex-ceeded their maximum shelf life. These mustbe inspected or replaced to ensure maxi-mum pump service.

If the maximum shelf life has been exceeded, or ifanything appears to be abnormal, contact yourGorman-Rupp distributor or the factory to deter-mine the repair or updating policy. Do not put thepump into service until appropriate action hasbeen taken.

POSITIONING PUMP

Lifting

Use lifting equipment with a capacity of at least4,920 pounds (2231,7 kg). This pump weighs ap-proximately 984 pounds (446,3 kg), not includingthe weight of accessories and base. Customer in-stalled equipment such as suction and dischargepiping must be removed before attempting to lift.

The pump assembly can be seriouslydamaged if the cables or chains used to liftand move the unit are improperly wrappedaround the pump.

Mounting

Locate the pump in an accessible place as close aspractical to the liquid being pumped. Level mount-ing is essential for proper operation.

The pump may have to be supported or shimmedto provide for level operation or to eliminate vibra-tion.

Clearance

When positioning the pump, allow a minimumclearance of 20 inches (508,0 mm) in front of theback cover to permit removal of the cover and easyaccess to the pump interior.

SUCTION AND DISCHARGE PIPING

Pump performance is adversely effected by in-creased suction lift, discharge elevation, and fric-tion losses. See the performance curve and oper-ating range shown on Page E-1 to be sure youroverall application allows pump to operate withinthe safe operation range.

Materials

Either pipe or hose maybe used for suction anddischarge lines; however, the materials must becompatible with the liquid being pumped. If hose is



used in suction lines, it must be the rigid-wall, rein-forced type to prevent collapse under suction. Us-ing piping couplings in suction lines is not recom-mended.

Line Configuration

Keep suction and discharge lines as straight aspossible to minimize friction losses. Make mini-mum use of elbows and fittings, which substan-tially increase friction loss. If elbows are necessary,use the long-radius type to minimize friction loss.

Connections to Pump

Before tightening a connecting flange, align it ex-actly with the pump port. Never pull a pipe line intoplace by tightening the flange bolts and/or cou-plings.

Lines near the pump must be independently sup-ported to avoid strain on the pump which couldcause excessive vibration, decreased bearing life,and increased shaft and seal wear. If hose-typelines are used, they should have adequate supportto secure them when filled with liquid and underpressure.

Gauges

Most pumps are drilled and tapped for installingdischarge pressure and vacuum suction gauges.If these gauges are desired for pumps that are nottapped, drill and tap the suction and dischargelines not less than 18 inches (457,2 mm) from thesuction and discharge ports and install the lines.Installation closer to the pump may result in erraticreadings.

SUCTION LINES

To avoid air pockets which could affect pump prim-ing, the suction line must be as short and direct aspossible. When operation involves a suction lift, theline must always slope upward to the pump fromthe source of the liquid being pumped; if the lineslopes down to the pump at any point along thesuction run, air pockets will be created.

Fittings

Suction lines should be the same size as the pumpinlet. If reducers are used in suction lines, theyshould be the eccentric type, and should be in-stalled with the flat part of the reducers uppermostto avoid creating air pockets. Valves are not nor-mally used in suction lines, but if a valve is used,install it with the stem horizontal to avoid air pock-ets.

Strainers

If a strainer is furnished with the pump, be certainto use it; any spherical solids which pass through astrainer furnished with the pump will also passthrough the pump itself.

If a strainer is not furnished with the pump, but isinstalled by the pump user, make certain that thetotal area of the openings in the strainer is at leastthree or four times the cross section of the suctionline, and that the openings will not permit passageof solids larger than the solids handling capabilityof the pump.

This pump is designed to handle up to 1 1/4 inch(31,8 mm) diameter spherical solids.

Sealing

Since even a slight leak will affect priming, head,and capacity, especially when operating with ahigh suction lift, all connections in the suction lineshould be sealed with pipe dope to ensure an air-tight seal. Follow the sealant manufacturer’s rec-ommendations when selecting and applying thepipe dope. The pipe dope should be compatiblewith the liquid being pumped.

Suction Lines In Sumps

If a single suction line is installed in a sump, itshould be positioned away from the wall of thesump at a distance equal to 1 1/2 times the diame-ter of the suction line.

If there is a liquid flow from an open pipe into thesump, the flow should be kept away from the suc-tion inlet because the inflow will carry air down intothe sump, and air entering the suction line will re-duce pump efficiency.



If it is necessary to position inflow close to the suc-tion inlet, install a baffle between the inflow and thesuction inlet at a distance 1 1/2 times the diameterof the suction pipe. The baffle will allow entrainedair to escape from the liquid before it is drawn intothe suction inlet.

If two suction lines are installed in a single sump,the flow paths may interact, reducing the efficiencyof one or both pumps. To avoid this, position thesuction inlets so that they are separated by a dis-tance equal to at least 3 times the diameter of thesuction pipe.

Suction Line Positioning

The depth of submergence of the suction line iscritical to efficient pump operation. Figure 2 showsrecommended minimum submergence vs. veloc-ity.

NOTEThe pipe submergence required may be reducedby installing a standard pipe increaser fitting at theend of the suction line. The larger opening size willreduce the inlet velocity. Calculate the requiredsubmergence using the following formula basedon the increased opening size (area or diameter).

Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity

DISCHARGE LINES

Siphoning

Do not terminate the discharge line at a level lowerthan that of the liquid being pumped unless a si-phon breaker is used in the line. Otherwise, a si-phoning action causing damage to the pumpcould result.

Valves

If a throttling valve is desired in the discharge line,use a valve as large as the largest pipe to minimizefriction losses. Never install a throttling valve in asuction line.

With high discharge heads, it is recommended thata throttling valve and a system check valve be in-stalled in the discharge line to protect the pumpfrom excessive shock pressure and reverse rota-tion when it is stopped.



If the application involves a high dischargehead, gradually close the dischargethrottling valve before stopping the pump.

Bypass Lines

Self-priming pumps are not air compressors. Dur-ing the priming cycle, air from the suction line mustbe vented to atmosphere on the discharge side. Ifthe discharge line is open, this air will be ventedthrough the discharge. However, if a check valvehas been installed in the discharge line, the dis-charge side of the pump must be opened toatmos-pheric pressure through a bypass line installed be-tween the pump discharge and the check valve. Aself-priming centrifugal pump will not prime ifthere is sufficient static liquid head to hold the dis-charge check valve closed.

NOTEThe bypass line should be sized so that it does notaffect pump discharge capacity; however, the by-pass line should be at least 1 inch in diameter tominimize the chance of plugging.

In low discharge head applications (less than 30feet), it is recommended that the bypass line be runback to the wet well, and located 6 inches belowthe water level or cut-off point of the low levelpump. In some installations, this bypass line maybe terminated with a six-to-eight foot length of 1 1/4inch I.D. smooth-bore hose; air and liquid ventedduring the priming process will then agitate thehose and break up any solids, grease, or othersubstances likely to cause clogging.

A bypass line that is returned to a wet wellmust be secured against being drawn intothe pump suction inlet.

It is also recommended that pipe unions be in-stalled at each 90_ elbow in a bypass line to easedisassembly and maintenance.

In high discharge head applications (more than30 feet), an excessive amount of liquid may be by-passed and forced back to the wet well under thefull working pressure of the pump; this will reduceoverall pumping efficiency. Therefore, it is recom-mended that a Gorman-Rupp Automatic Air Re-lease Valve be installed in the bypass line.

Gorman-Rupp Automatic Air Release Valves arereliable, and require minimum maintenance. SeeAUTOMATIC AIR RELEASE VALVE in this sectionfor installation and theory of operation of the Auto-matic Air Release Valve. Consult your Gorman-Rupp distributor, or contact the Gorman-RuppCompany for selection of an Automatic Air ReleaseValve to fit your application.

If the installation involves a flooded suction such asa below-ground lift station. A pipe union and manu-al shut-off valve may be installed in the bleed line toallow service of the valve without shutting down thestation, and to eliminate the possibility of flooding.If a manual shut-off valve is installed anywhere inthe air release piping, it must be a full-opening balltype valve to prevent plugging by solids.

If a manual shut-off valve is installed ina bypass line, it must not be left closedduring operation. A closed manual shut-off valve may cause a pump which haslost prime to continue to operate with-out reaching prime, causing dangerousoverheating and possible explosiverupture of the pump casing. Personnelcould be severely injured.

Allow an over-heated pump to cool be-fore servicing. Do not remove plates,covers, gauges, or fittings from an over-heated pump. Liquid within the pumpcan reach boiling temperatures, and va-por pressure within the pump can causeparts being disengaged to be ejectedwith great force. After the pump cools,drain the liquid from the pump by re-moving the casing drain plug. Use cau-tion when removing the plug to preventinjury to personnel from hot liquid.



AUTOMATIC AIR RELEASE VALVE

When properly installed and correctly adjusted tothe specific hydraulic operating conditions of theapplication, the Gorman-Rupp Automatic Air Re-lease Valve will permit air to escape through the by-pass line, and then close automatically when thepump is fully primed and pumping at full capacity.

Theory of Operation

Figures 3 and 4 show a cross-sectional view of theAutomatic Air Release Valve, and a correspondingdescription of operation.

Figure 3. Valve in Open Position

During the priming cycle, air from the pump casingflows through the bypass line, and passes throughthe Air Release Valve to the wet well (Figure 3).

Figure 4. Valve in Closed Position

When the pump is fully primed, pressure resultingfrom flow against the valve diaphragm com-presses the spring and closes the valve (Figure 4).The valve will remain closed, reducing the bypass

of liquid to 1 to 5 gallons per minute, until the pumploses its prime or stops.

Some leakage (1 to 5 gallons per min-ute) will occur when the valve is fullyclosed. Be sure the bypass line is di-rected back to the wet well or tank toprevent hazardous spills.

When the pump shuts down, the spring returns thediaphragm to its original position. Any solids thatmay have accumulated in the diaphragm chambersettle to the bottom and are flushed out during thenext priming cycle.

NOTEThe valve will remain open if the pump does notreach its designed capacity or head. Valve closingpressure is dependent upon the discharge head ofthe pump at full capacity. The range of the valveclosing pressure is established by the tension rateof the spring as ordered from the factory. Valve clos-ing pressure can be further adjusted to the exactsystem requirements by moving the spring retain-ing pin up or down the plunger rod to increase ordecrease tension on the spring. Contact your Gor-man-Rupp distributor or the Gorman-Rupp Compa-ny for information about an Automatic Air ReleaseValve for your specific application.

Air Release Valve Installation

The Automatic Air Release Valve must be inde-pendently mounted in a horizontal position andconnected to the discharge line of the self-primingcentrifugal pump (see Figure 5).

NOTEIf the Air Release Valve is to be installed on a stagedpump application, contact the factory for specificinstallation instructions.



DISCHARGE PIPE

DISCHARGECHECK VALVE

PUMP DISCHARGE

SELF-PRIMINGCENTRIFUGALPUMP

SUCTIONLINE

SUPPORTBRACKET

CLEAN-OUTCOVER

INSTALL AIR RELEASE VALVEIN HORIZONTAL POSITION

90_ LONGRADIUSELBOW

BLEED LINE 1”(25,4 MM) DIA. MIN.(CUSTOMERFURNISHED)EXTEND 6”(152,4 MM)BELOW LIQUID

WET WELLOR SUMP

LEVEL SURFACE

Figure 5. Typical Automatic Air Release Valve Installation

The valve inlet line must be installed between thepump discharge port and the non-pressurized sideof the discharge check valve. The valve inlet is atthe large end of the valve body, and is providedwith standard 1 inch NPT pipe threads.

The valve outlet is located at the opposite end ofthe valve, and is also equipped with standard 1inch NPT pipe threads. The outlet should be con-nected to a bleed line which slopes back to the wetwell or sump. The bleed line must be the same sizeas the inlet piping, or larger. If piping is used for thebleed line, avoid the use of elbows whenever pos-sible.

NOTEIt is recommended that each Air Release Valve befitted with an independent bleeder line directedback to the wet well. However, if multiple Air Re-lease Valves are installed in a system, the bleederlines may be directed to a common manifold pipe.Contact your Gorman-Rupp distributor or the Gor-man-Rupp Company for information about installa-tion of an Automatic Air Release Valve for your spe-cific application.

ALIGNMENT

The alignment of the pump and its power source iscritical for trouble-free mechanical operation. Ineither a flexible coupling or V-belt driven system,the driver and pump must be mounted so that theirshafts are aligned with and parallel to each other. Itis imperative that alignment be checked after thepump and piping are installed, and before opera-tion.

NOTECheck Rotation, Section C, before final alignmentof the pump.

When mounted at the Gorman-Rupp factory, driverand pump are aligned before shipment. Misalign-ment will occur in transit and handling. Pumpsmust be checked and realigned before operation.Before checking alignment, tighten the foundationbolts. The pump casing feet and/or pedestal feet,and the driver mounting bolts should also be tightlysecured.



When checking alignment, disconnectthe power source to ensure that thepump will remain inoperative.

Adjusting the alignment in one directionmay alter the alignment in another direc-tion. Check each procedure after alteringalignment.

Coupled Drives

When using couplings, the axis of the powersource must be aligned to the axis of the pumpshaft in both the horizontal and vertical planes.Most couplings require a specific gap or clearancebetween the driving and the driven shafts. Refer tothe coupling manufacturer’s service literature.

Align spider insert type couplings by using calipersto measure the dimensions on the circumferenceof the outer ends of the coupling hub every 90 de-grees. The coupling is in alignment when the hubends are the same distance apart at all points (seeFigure 6A).

Figure 6A. Aligning Spider-Type Couplings

Figure 6B. Aligning Non-SpiderType Couplings

Align non-spider type couplings by using a feelergauge or taper gauge between the coupling halvesevery 90 degrees. The coupling is in alignmentwhen the hubs are the same distance apart at allpoints (see Figure 6B).

Check parallel adjustment by laying a straightedgeacross both coupling rims at the top, bottom, andside. When the straightedge rests evenly on bothhalves of the coupling, the coupling is in horizontalparallel alignment. If the coupling is misaligned,use a feeler gauge between the coupling and thestraightedge to measure the amount of misalign-ment.

V-Belt Drives

When using V-belt drives, the power source andthe pump must be parallel. Use a straightedgealong the sides of the pulleys to ensure that the pul-leys are properly aligned (see Figure 6C). In drivesystems using two or more belts, make certain thatthe belts are a matched set; unmatched sets willcause accelerated belt wear.

MISALIGNED:SHAFTS

NOT PARALLEL

MISALIGNED:SHAFTS

NOT IN LINE

ALIGNED: SHAFTSPARALLEL AND

SHEAVES IN LINEFigure 6C. Alignment of V-Belt Driven Pumps



Tighten the belts in accordance with the belt manu-facturer’s instructions. If the belts are too loose,they will slip; if the belts are too tight, there will beexcessive power loss and possible bearing failure.Select pulleys that will match the proper speed ra-tio; overspeeding the pump may damage bothpump and power source.

Do not operate the pump without theguard in place over the rotating parts.Exposed rotating parts can catch cloth-ing, fingers, or tools, causing severe in-jury to personnel.

U-SERIES OM--01864--02

OPERATION PAGE C -- 1

OPERATION --- SECTION C


Follow the instructions on all tags, labels and de-cals attached to the pump.

This pump is designed to handle mostnon-volatile, non-flammable liquids,containing specified entrained solids.Do not attempt to pump volatile, corro-sive, or flammable materials, or any liq-uids which may damage the pump or en-danger personnel as a result of pumpfailure.

Pump speed and operating conditionsmust be within the performance rangeshown on Page E-1.

PRIMING

Install the pump and piping as described in IN-STALLATION. Make sure that the piping connec-tions are tight, and that the pump is securelymounted. Check that the pump is properly lubri-cated (see LUBRICATION in MAINTENANCEAND REPAIR).

This pump is self-priming, but the pump shouldnever be operated unless there is liquid in thepump casing.

Never operate this pump unless there isliquid in the pump casing. The pump willnot prime when dry. Extended operation ofa dry pump will destroy the seal assembly.

Add liquid to the pump casing when:

1. The pump is being put into service for thefirst time.

2. The pump has not been used for a consider-able length of time.

3. The liquid in the pump casing has evapo-rated.

Once the pump has been filled, the pump willprime and reprime as necessary.

After filling the pump casing, reinstalland tighten the fill plug. Do not attemptto operate the pump unless all connect-ing piping is securely installed. Other-wise, liquid in the pump forced out un-der pressure could cause injury to per-sonnel.

To fill the pump, remove the pump casing fill coveror fill plug in the top of the casing, and add cleanliquid until the casing is filled. Replace the fill coveror fill plug before operatingh the pump.

STARTING

Consult the operations manual furnished with thepower source.

Rotation

The correct direction of pump rotation is counter-clockwise when facing the impeller. The pumpcould be damaged and performance adversely af-fected by incorrect rotation. If pump performanceis not within the specified limits (see the curve onpage E-1), check the direction of power source ro-tation before further troubleshooting.

OPERATION

Lines With a Bypass

If a Gorman-Rupp Automatic Air Release Valve hasbeen installed, the valve will automatically open to

U-SERIESOM--01864--02

OPERATIONPAGE C -- 2

allow the pump to prime, and automatically closeafter priming is complete (see INSTALLATION forAir Release Valve operation).

If the bypass line is open, air from the suction linewill be discharged through the bypass line back tothe wet well during the priming cycle. Liquid willthen continue to circulate through the bypass linewhile the pump is in operation.

Lines Without a Bypass

Open all valves in the discharge line and start thepower source. Priming is indicated by a positivereading on the discharge pressure gauge or by aquieter operation. The pump may not prime imme-diately because the suction line must first fill withliquid. If the pump fails to prime within five minutes,stop it and check the suction line for leaks.

After the pump has been primed, partially close thedischarge line throttling valve in order to fill the lineslowly and guard against excessive shock pres-sure which could damage pipe ends, gaskets,sprinkler heads, and any other fixtures connectedto the line. When the discharge line is completelyfilled, adjust the throttling valve to the required flowrate.

Do not operate the pump against aclosed discharge throttling valve forlong periods of time. If operated againsta closed discharge throttling valve,pump components will deteriorate, andthe liquid could come to a boil, buildpressure, and cause the pump casing torupture or explode.

Leakage

No leakage should be visible at pump mating sur-faces, or at pump connections or fittings. Keep allline connections and fittings tight to maintain maxi-mum pump efficiency.

Liquid Temperature And Overheating

The maximum liquid temperature for this pump is160_ F (71_ C). Do not apply it at a higher operat-ing temperature.

Overheating can occur if operated with the valvesin the suction or discharge lines closed. Operatingagainst closed valves could bring the liquid to aboil, build pressure, and cause the pump to rup-ture or explode. If overheating occurs, stop thepump and allow it to cool before servicing it. Refill

the pump casing with cool liquid.

Allow an over-heated pump to cool be-fore servicing. Do not remove plates,covers, gauges, or fittings from an over-heated pump. Liquid within the pumpcan reach boiling temperatures, and va-por pressure within the pump can causeparts being disengaged to be ejectedwith great force. After the pump cools,drain the liquid from the pump by re-moving the casing drain plug. Use cau-tion when removing the plug to preventinjury to personnel from hot liquid.

As a safeguard against rupture or explosion due toheat, this pump is equipped with a pressure reliefvalve which will open if vapor pressure within thepump casing reaches a critical point. If overheatingdoes occur, stop the pump immediately and allowit to cool before servicing it. Approach any over-heated pump cautiously. It is recommended thatthe pressure relief valve assembly be replaced ateach overhaul, or any time the pump casing over-heats and activates the valve. Never replace thisvalve with a substitute which has not been speci-fied or provided by the Gorman-Rupp Company.

Strainer Check

If a suction strainer has been shipped with thepump or installed by the user, check the strainerregularly, and clean it as necessary. The strainershould also be checked if pump flow rate begins todrop. If a vacuum suction gauge has been in-stalled, monitor and record the readings regularlyto detect strainer blockage.

U-SERIES OM--01864--02

OPERATION PAGE C -- 3

Never introduce air or steam pressure into thepump casing or piping to remove a blockage. Thiscould result in personal injury or damage to theequipment. If backflushing is absolutely neces-sary, liquid pressure must be limited to 50% of themaximum permissible operating pressure shownon the pump performance curve.

Pump Vacuum Check

With the pump inoperative, install a vacuum gaugein the system, using pipe dope on the threads.Block the suction line and start the pump. At oper-

ating speed the pump should pull a vacuum of 20

inches ((508,0 mm) or more of mercury. If it doesnot, check for air leaks in the seal, gasket, or dis-charge valve.

Open the suction line, and read the vacuum gaugewith the pump primed and at operation speed.Shut off the pump. The vacuum gauge reading willimmediately drop proportionate to static suctionlift, and should then stabilize. If the vacuum readingfalls off rapidly after stabilization, an air leak exists.Before checking for the source of the leak, checkthe point of installation of the vacuum gauge.

STOPPING

Never halt the flow of liquid suddenly. If the liquidbeing pumped is stopped abruptly, damagingshock waves can be transmitted to the pump andpiping system. Close all connecting valves slowly.

On engine driven pumps, reduce the throttlespeed slowly and allow the engine to idle briefly be-fore stopping.

If the application involves a high dischargehead, gradually close the dischargethrottling valve before stopping the pump.

After stopping the pump, disconnect the power

source to ensure that the pump will remain inop-erative.

Cold Weather Preservation

In below freezing conditions, drain the pump toprevent damage from freezing. Also, clean out anysolids by flushing with a hose. Operate the pumpfor approximately one minute; this will remove anyremaining liquid that could freeze the pump rotat-ing parts. If the pump will be idle for more than afew hours, or if it has been pumping liquids con-taining a large amount of solids, drain the pump,and flush it thoroughly with clean water. To preventlarge solids from clogging the drain port and pre-venting the pump from completely draining, inserta rod or stiff wire in the drain port, and agitate theliquid during the draining process. Clean out anyremaining solids by flushing with a hose.

BEARING TEMPERATURE CHECK

Bearings normally run at higher than ambient tem-peratures because of heat generated by friction.Temperatures up to 160_F (71_ C) are considerednormal for bearings, and they can operate safely toat least 180_F (82_ C).

Checking bearing temperatures by hand is inaccu-rate. Bearing temperatures can be measured ac-curately by placing a contact-type thermometeragainst the housing. Record this temperature forfuture reference.

A sudden increase in bearing temperature is awarning that the bearings are at the point of failingto operate properly. Make certain that the bearinglubricant is of the proper viscosity and at the cor-rect level (see LUBRICATION in MAINTENANCEAND REPAIR). Bearing overheating can also becaused by shaft misalignment and/or excessive vi-bration.

When pumps are first started, the bearings mayseem to run at temperatures above normal. Con-tinued operation should bring the temperaturesdown to normal levels.


TROUBLESHOOTING PAGE D -- 1

TROUBLESHOOTING --- SECTION D



1. Familiarize yourself with this manual.2. Lock out or disconnect the power

source to ensure that the pump willremain inoperative.

3. Allow the pump to completely cool ifoverheated.

4. Check the temperature before open-ing any covers, plates, or plugs.


6. Vent the pump slowly and cautiously.7. Drain the pump.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP FAILS TOPRIME

Suction check valve contaminated ordamaged.

Clean or replace check valve.

Air leak in suction line.

Lining of suction hose collapsed.

Correct leak.

Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replaceleaking or worn seal or gasket.

Suction lift or discharge head too high. Check piping installation and in-stall bypass line if needed. SeeINSTALLATION.

Strainer clogged. Check strainer and clean if neces-sary.

Not enough liquid in casing. Add liquid to casing. See PRIM-ING.

PUMP STOPS ORFAILS TO DELIVERRATED FLOW ORPRESSURE

Air leak in suction line.

Lining of suction hose collapsed.

Correct leak.

Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replaceleaking or worn seal or gasket.

Strainer clogged. Check strainer and clean if neces-sary.


TROUBLESHOOTINGPAGE D -- 2


PUMP STOPS ORFAILS TO DELIVERRATED FLOW ORPRESSURE (cont.)

PUMP REQUIRESTOO MUCHPOWER

PUMP CLOGSFREQUENTLY

Impeller or other wearing parts wornor damaged.

Replace worn or damaged parts.Check that impeller is properlycentered and rotates freely.

Impeller clogged. Free impeller of debris.

Pump speed too slow. Check driver output; check beltsor couplings for slippage.

Discharge head too high. Install bypass line.

Suction lift too high. Measure lift w/vacuum gauge. Re-duce lift and/or friction losses insuction line.

Pump speed too high. Check driver output; check thatsheaves or couplings are cor-rectly sized.

Discharge head too low. Adjust discharge valve.

Liquid solution too thick. Dilute if possible.

Bearing(s) frozen. Disassemble pump and checkbearing(s).

Liquid solution too thick. Dilute if possible.

Discharge flow too slow. Open discharge valve fully to in-crease flow rate, and run powersource at maximum governedspeed.

Suction check valve or foot valveclogged or binding.

Clean valve.

EXCESSIVE NOISE Cavitation in pump.

Impeller clogged or damaged.

Pump or drive not securely mounted.

Pumping entrained air.

Reduce suction lift and/or frictionlosses in suction line. Record vac-uum and pressure gauge readingsand consult local representative orfactory.

Locate and eliminate source of airbubble.

Secure mounting hardware.

Clean out debris; replace dam-aged parts.

Suction intake not submerged atproper level or sump too small.

Check installation and correct sub-mergence as needed.


TROUBLESHOOTING PAGE D -- 3


BEARINGS RUNTOO HOT

Bearing temperature is high, butwithin limits.

Check bearing temperature regu-larly to monitor any increase.

Low or incorrect lubricant. Check for proper type and level oflubricant.

Suction and discharge lines notproperly supported.

Check piping installation forproper support.

Drive misaligned. Align drive properly.

PREVENTIVE MAINTENANCE

Since pump applications are seldom identical, andpump wear is directly affected by such things asthe abrasive qualities, pressure and temperatureof the liquid being pumped, this section is intendedonly to provide general recommendations andpractices for preventive maintenance. Regardlessof the application however, following a routine pre-ventive maintenance schedule will help assuretrouble-free performance and long life from yourGorman-Rupp pump. For specific questions con-cerning your application, contact your Gorman-Rupp distributor or the Gorman-Rupp Company.

Record keeping is an essential component of agood preventive maintenance program. Changesin suction and discharge gauge readings (if so

equipped) between regularly scheduled inspec-tions can indicate problems that can be correctedbefore system damage or catastrophic failure oc-curs. The appearance of wearing parts should alsobe documented at each inspection for comparisonas well. Also, if records indicate that a certain part(such as the seal) fails at approximately the sameduty cycle, the part can be checked and replacedbefore failure occurs, reducing unscheduled downtime.

For new applications, a first inspection of wearingparts at 250 hours will give insight into the wear ratefor your particular application. Subsequent inspec-tions should be performed at the intervals shownon the chart below. Critical applications should beinspected more frequently.


TROUBLESHOOTINGPAGE D -- 4

General Condition (Temperature, UnusualNoises or Vibrations, Cracks, Leaks,Loose Hardware, Etc.) I

Pump Performance (Gauges, Speed, Flow) IBearing Lubrication I RSeal Lubrication (And Packing Adjustment,

If So Equipped) I RV-Belts (If So Equipped) IAir Release Valve Plunger Rod (If So Equipped) I CFront Impeller Clearance (Wear Plate) IRear Impeller Clearance (Seal Plate) ICheck Valve IPressure Relief Valve (If So Equipped) CPump and Driver Alignment IShaft Deflection IBearings IBearing Housing IPiping IDriver Lubrication --- See Mfgr’s Literature

Legend:I = Inspect, Clean, Adjust, Repair or Replace as Necessary

C = CleanR = Replace* Service interval based on an intermittent duty cycle equal to approximately 4000 hours annually.

Adjust schedule as required for lower or higher duty cycles or extreme operating conditions.

Preventive Maintenance Schedule

Item Daily Weekly Monthly Semi-Annually

Annually

Service Interval*


MAINTENANCE & REPAIR PAGE E -- 1

PUMP MAINTENANCE AND REPAIR --- SECTION E

MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPER-ATING PERFORMANCE.

STANDARD PERFORMANCE FOR PUMP MODEL U6B60-B

Based on 70_ F (21_ C) clear water at sea levelwith minimum suction lift. Since pump installationsare seldom identical, your performance may be dif-ference due to such factors as viscosity, specificgravity, elevation, temperature, and impeller trim.

If your pump serial number is followed by an “N”,your pump is NOT a standard production model.

Contact the Gorman-Rupp Company to verify per-formance or part numbers.

Pump speed and operating conditionpoints must be within the continuous per-formance range shown on the curve.


MAINTENANCE & REPAIRPAGE E -- 2

SECTION DRAWING

Figure 1. Pump Model U6B60---B

ITEMNO.

PART NAME PARTNUMBER

MAT’LCODE

QTY ITEMNO.

PART NAME PARTNUMBER

MAT’LCODE

QTY



PARTS LISTPump Model U6B60---B(From S/N 948005 up)

If your pump serial number is followed by an “N”, your pump is NOT a standard production model. Contactthe Gorman-Rupp Company to verify part numbers.

1 PUMP CASING 38222---703 10000 12 [ REPAIR ROTATING ASSY 44163---133 (FIG. 2) 13 PIPE PLUG P04 15079 14 PIPE PLUG P04 15079 15 HEX HD CAPSCREW B1208 15991 86 LOCKWASHER J12 15991 87 DISCHARGE STICKER 6588BJ --- --- --- 18 DISCHARGE FLANGE 1758 10010 19 DISCH FLANGE GSKT 1679G 19370 1

10 NAME PLATE 38818---026 13990 111 DRIVE SCREW BM#04---03 17000 412 ROT ASSY SHIM SET 48261---030 --- --- --- 613 CASING RING 31281---047 15020 114 HEX HD CAPSCREW B0806 15991 615 LOCKWASHER J08 15991 616 HEX HD CAPSCREW B0805 15991 617 LOCKWASHER J08 15991 618 FILL CVR PLT ASSY 42111---344 --- --- --- 119 ---COVER PLATE NOT AVAILABLE 120 ---DRIVE SCREW BM#04---03 17000 221 ---WARNING PLATE 38816---097 13990 122 ---COVER GSKT 50G 19210 123 CLAMP BAR SCREW 31912---009 15000 124 MACHINE BOLT A1014 15991 225 CLAMP BAR 38111---004 11010 126 PIPE PLUG P04 15079 127 ROTATION DECAL 2613M --- --- --- 128 ROT ASSY O---RING 25152---453 --- --- --- 129 CASING DRAIN PLUG P16 10009 230 SEAL PLATE O-RING 25152---381 --- --- --- 131 WEAR PLATE ASSY 46451---737 --- --- --- 132 WEAR PLATE O---RING 25152---381 --- --- --- 133 LOCKWASHER J06 15991 434 HEX NUT D06 15991 435 BACK COVER O---RING S1676 --- --- --- 136 BACK COVER ASSY 42111---941 --- --- --- 137 ---BACK CVR PLATE NOT AVAILABLE 138 ---WARNING PLATE 2613EV 13990 139 ---DRIVE SCREW BM#04---03 17000 440 ---RELIEF VALVE 26662---006 --- --- --- 141 ---WARNING DECAL 38816---302 --- --- --- 142 STUD C1211 15991 2

43 HAND NUT 10701A 15040 244 SUCT FLANGE GSKT 11402G 19370 145 SUCTION FLANGE 11402 10010 146 HEX HD CAPSCREW B1211 15991 847 LOCKWASHER J12 15991 848 SUCTION STICKER 6588AG --- --- --- 149 PIPE PLUG P04 15079 150 CHECK VALVE ASSY 46411---064 --- --- --- 151 CHECK VALVE PIN 11645 17010 1

NOT SHOWN:FILL HR TO PRIME STK 6588AH --- --- --- 1INSTRUCTION DECAL 11421 --- --- --- 1INSTRUCTION LABEL 2316DK --- --- --- 1WARNING DECAL 38816---096 --- --- --- 1

OPTIONAL:DISASSEMBLY TOOL 12858 --- --- --- 1/F SPOOL FLANGES:---SUCTION 11402A 10010 1---DISCHARGE 11402B 10010 1/FM METRIC FLANGES:---SUCTION 38642---502 10000 1---DISCHARGE 38642---503 10000 1ADI WEAR PLATE 46451---740 --- --- --- 1

316 SST OPTION KIT:--- IMPELLER 38618---016 17040 1---SEAL PLATE 38272---408 17040 1---WEAR PLATE 46451---741 --- --- --- 1---PRESS RELIEF VALVE 46431---803 --- --- --- 1

CASING HEATERS:---120V 47811---060 --- --- --- 1---240V 47811---061 --- --- --- 1

PRESS RELIEF VALVE:---BRASS SEWAGE TYPE 46431---628 --- --- --- 1

AIR RELEASE VALVES:---10# COMP SPRING GRP33---07A --- --- --- 1---25# COMP SPRING GRP33---07 --- --- --- 1---80# COMP SPRING GRP33---07B --- --- --- 1

INDICATES PARTS RECOMMENDED FOR STOCK

[ REPAIR ROTATING ASSEMBLY SHIPPED DRY OF LUBRICANT.REFER TO LUBRICATION IN THIS SECTION FOR SPECIFICATIONS.



SECTION DRAWING

DRIVE END VIEWSEAL AREA DETAIL

Figure 2. 44163---133 Repair Rotating Assembly



PARTS LIST[ 44163---133 Repair Rotating Assembly

ITEMNO. PART NAME

PARTNUMBER

MAT’LCODE QTY

1 IMPELLER 38618---016 11010 12 SEAL ASSEMBLY 46512---048 --- --- --- 13 SEAL PLATE 38272---408 10010 14 SEAL PLATE GSKT 12350G 20000 15 INBOARD OIL SEAL S1917 --- --- --- 16 HEX HD CAPSCREW B1006 15991 47 LOCKWASHER J10 15991 48 BEARING HOUSING 38251---407 10000 19 INBOARD BALL BEARING 23421---461 --- --- --- 1

10 VENTED SEAL CAVITY PLUG 4823A 15079 111 BRG HOUSING AIR VENT S1530 --- --- --- 112 OUTBOARD OIL SEAL S1917 --- --- --- 113 REDUCER PIPE BUSHING AP0802 15079 114 HEX HD CAPSCREW B0605 1/2 15991 615 LOCKWASHER J06 15991 616 BEARING CAP 38322---415 10010 117 IMPELLER SHAFT KEY N0612 15990 118 IMPELLER SHAFT 38515---579 16000 119 RETAINING RING S215 --- --- --- 120 OIL LEVEL SIGHT GAUGE S1471 --- --- --- 121 PIPE PLUG P12 15079 122 DRAIN PLUG P08 15079 123 DRAIN PLUG P08 15079 124 BEARING CAP O-RING S333 --- --- --- 125 OUTBOARD BALL BEARING 23422---412 --- --- --- 126 IMPELLER SHIM SET 5091 17090 REF27 SEAL SLEEVE O-RING 25152---026 --- --- --- REF28 SEAL SLEEVE 12359 16000 129 IMPELLER WASHER 10278 15030 130 IMPELLER CAPSCREW DM1004S 15991 131 SEAL PLATE O-RING 25152---381 --- --- --- 132 ROTATING ASSEMBLY O-RING 25152---453 --- --- --- 133 SHIPPING PLUG 11495B 15079 134 SHIPPING PLUG 11495B 15079 1

NOT SHOWN:ADJ SHIM SET 48261---030 --- --- --- 6

OPTIONAL:n KALREZr METAL BELLOWS SEAL ASSY 46512---185 --- --- --- 1

ADI REPAIR ROTATING ASSY 44163---232 --- --- --- 1ADI IMPELLER 38618---016 1102H 1ADI SEAL PLATE 38272---408 1102H 1PERMALON COATED SEAL 46512---189 --- --- --- 1

INDICATES PARTS RECOMMENDED FOR STOCKn KALREZr AND VITONt ARE PRODUCTS OF THE DUPONT CORP[ REPAIR ROTATING ASSEMBLY SHIPPED DRY OF LUBRICANT.

REFER TO LUBRICATION IN THIS SECTION FOR SPECIFICATIONS.



PUMP AND SEAL DISASSEMBLYAND REASSEMBLY


Follow the instructions on all tags, label and de-cals attached to the pump.

This pump requires little service due to its rugged,minimum-maintenance design. However, if it be-comes necessary to inspect or replace the wearingparts, follow these instructions which are keyed tothe sectional views (see Figures 1 and 2) and theaccompanying parts lists.

As described on the following page, this manualwill alert personnel to known procedures which re-quire special attention, to those which could dam-age equipment, and to those which could be dan-gerous to personnel. However, this manual cannotpossibly anticipate and provide detailed precau-tions for every situation that might occur duringmaintenance of the unit. Therefore, it is the respon-sibility of the owner/maintenance personnel to en-sure that only safe, established maintenance pro-cedures are used, and that any procedures not ad-dressed in this manual are performed only after es-tablishing that neither personal safety nor pump in-tegrity are compromised by such practices.

Most service functions may be performed by drain-ing the pump and removing the back cover assem-bly. If major repair is required, the piping and/or en-gine must be disconnected. The following instruc-tions assume complete disassembly is required.

Before attempting to service the pump, switch offthe engine ignition or take other action to ensurethat it will remain inoperative. Close all valves in thesuction and discharge lines.


1. Familiarize yourself with this man-ual.

2. Disconnect the power source toensure that the pump will remaininoperative.

3. Allow the pump to cool if over-heated.

4. Check the temperature beforeopening any covers, plates, orplugs.


6. Vent the pump slowly and cau-tiously.

7. Drain the pump.

Use lifting and moving equipment ingood repair and with adequate capacityto prevent injuries to personnel or dam-age to equipment. Suction and dis-charge hoses and piping must be re-moved from the pump before lifting.

Back Cover And Wear Plate Removal

(Figure 1)

The wear plate (31) and check valve (50) are easilyaccessible and may be serviced by removing theback cover assembly (36). Before attempting toservice the pump, remove the pump casing drainplugs (29) and drain the pump. Clean and reinstallthe drain plug.

Remove the hand nuts (43) and pull the back coverand assembled wear plate from the pump casing(1). Inspect the wear plate, and replace it if badlyscored and worn. To remove the wear plate, disen-gage the hardware (33 and 34).

Inspect the wear plate O-ring (32) and the backcover O-ring (35) and replace them if damaged orworn.

Suction Check Valve Removal

(Figure 1)

If the check valve assembly (50) is to be serviced,remove the check valve pin (56), reach through theback cover opening, and pull the complete assem-bly from the suction flange.

NOTEFurther disassembly of the check valve is not re-

quired since it must be replaced as a complete unit.



Individual parts are not sold separately.

Rotating Assembly Removal

(Figure 2)

The rotating assembly may be removed from eitherside of the pump casing (1, Figure 1); however, it isrecommended that it be removed through theback cover opening.

The impeller (1) should be loosened while the rotat-ing assembly is still secured to the pump casing.Before loosening the impeller, remove the seal cav-ity drain plug (23) and drain the seal lubricant. Thiswill prevent the oil in the seal cavity from escapingas the impeller is loosened. Clean and reinstall theseal cavity drain plug.

Immobilize the impeller by wedging a block ofwood between the vanes, and remove the impellercapscrew and washer (29 and 30).

Install a lathe dog on the drive end of the shaft (18)with the “V” notch positioned over the shaft key-way. Strike the lathe dog sharply in a counterclock-wise direction (when facing the drive end of theshaft). When the impeller breaks loose, remove thewood block and lathe dog. Do not fully unscrew theimpeller from the shaft at this time.

(Figure 1)

Remove the inner hardware (16 and 17) from thepump casing ring (13). Install three of the innercapscrews in the jacking holes in the casing, anduse them to press the rotating assembly into thepump casing until the bearing housing is free.

Remove the jacking screws from the casing ring.Remove the outer hardware (14 and 15) and shimsets (12). Separate the casing ring from the pumpcasing. Tie and tag the shim sets for ease of reas-sembly.

An optional disassembly tool for removing and in-stalling the rotating assembly is available from thefactory. If the removal tool is used, follow the direc-tions packaged with it. If improvised tools are used,be sure they are heavy enough for safe use and willnot damage the pump.

After the rotating assembly is loosened, screw a5/8-18 UNF X 16 inch long threaded rod into thetapped hole in the impeller shaft. Support the driveend of the shaft with another set of handles or alength of pipe (1 13/16” (46 mm) minimum I.D.) andslide the complete rotating assembly through theback cover opening as shown in Figure 3. Oncefree, use a suitable hoist and sling to move the ro-tating assembly to a suitable work area for furtherdisassembly.

ADD PIPEAS REQUIRED

Figure 3. Rotating Assembly Removal With Tool



Impeller Removal

(Figure 2)

Unscrew the impeller from the shaft in a counter-clockwise direction (when facing the impeller). Usecaution when unscrewing the impeller; tension onthe shaft seal spring will be released as the impelleris removed.

Remove the impeller adjusting shims (26). Tie andtag the shims or measure and record their thick-ness for ease of reassembly.

Seal Removal and Disassembly

(Figure 2)

Carefully remove the seal spring. Slide the sleeve(28) and the rotating portion of the seal off the shaftas a unit. Apply oil to the sleeve and work it up un-der the bellows. Slide the rotating portion of theseal off the sleeve.

Remove the seal sleeve O-ring (27). Use a stiff wirewith a hooked end to remove the stationary portionof the seal.

An alternate method of removing the stationaryportion of the seal is to remove the hardware (6 and7) and separate the seal plate (3) and gasket (4)from the bearing housing (8). Remove the sealplate O-ring (31). Position the seal plate on a flatsurface with the impeller side down. Use a woodendowel or other suitable tool to press on the backside of the stationary seat until the seat, O-ringsand stationary element can be removed.

If no further disassembly is required, refer to SealInstallation.

Shaft and Bearing Removal and Disassembly

(Figure 2)

When the pump is properly operated and main-tained, the bearing housing should not require dis-assembly. Disassemble the shaft and bearingsonly when there is evidence of wear or damage.

Shaft and bearing disassembly in the fieldis not recommended. These operationsshould be performed only in a properly-e-quipped shop by qualified personnel.

Remove the bearing housing drain plug (22) anddrain the lubricant. Clean and reinstall the drainplug. Remove the rotating assembly O-ring (32).

Disengage the hardware (14 and 15) and removethe bearing cap (16), O-ring (24) and oil seal (12)from the shaft. Using an arbor (or hydraulic) press,remove the oil seal from the bearing cap.

Place a block of wood against the impeller end ofthe shaft and tap the shaft and assembled bear-ings (9 and 25) from the bearing housing. Press theinboard oil seal (5) from the bearing housing bore.

After removing the shaft and bearings, clean andinspect the bearings in place as follows.

To prevent damage during removal fromthe shaft, it is recommended that bearingsbe cleaned and inspected in place. It isstrongly recommended that the bearingsbe replaced any time the shaft and bear-ings are removed.

Clean the bearing housing, shaft and all compo-nent parts (except the bearings) with a soft clothsoaked in cleaning solvent. Inspect the parts forwear or damage and replace as necessary.

Most cleaning solvents are toxic andflammable. Use them only in a well ven-tilated area free from excessive heat,sparks, and flame. Read and follow allprecautions printed on solvent contain-ers.



Clean the bearings thoroughly in fresh cleaningsolvent. Dry the bearings with filtered compressedair and coat with light oil.

Bearings must be kept free of all dirt andforeign material. Failure to do so will great-ly shorten bearing life. Do not spin drybearings. This may scratch the balls orraces and cause premature bearing fail-ure.

Rotate the bearings by hand to check for rough-ness or binding and inspect the bearing balls. If ro-tation is rough or the bearing balls are discolored,replace the bearings.

The bearing tolerances provide a tight press fitonto the shaft and a snug slip fit into the bearinghousing. Replace the bearings, shaft, or bearinghousing if the proper bearing fit is not achieved.

If bearing replacement is required, remove thebearing retaining ring (19) from the impeller shaft,and use a bearing puller to remove the inboard andoutboard bearings from the shaft.

Shaft and Bearing Reassembly and Installation

(Figure 2)

Inspect the shaft for distortion, nicks or scratches,or for thread damage on the impeller end. Dresssmall nicks and burrs with a fine file or emery cloth.Replace the shaft if defective.

Position the inboard oil seal (5) in the bearing hous-ing bore with the lip positioned as shown in Figure2. Press the oil seal into the housing until it is fullyseated.

To prevent damage during removal fromthe shaft, it is recommended that bearingsbe cleaned and inspected in place. It isstrongly recommended that the bearingsbe replaced any time the shaft and bear-ings are removed.

The bearings may be heated to ease installation.An induction heater, hot oil bath, electric oven, orhot plate may be used to heat the bearings. Bear-ings should never be heated with a direct flame ordirectly on a hot plate.

NOTEIf a hot oil bath is used to heat the bearings, both theoil and the container must be absolutely clean. Ifthe oil has been previously used, it must be thor-oughly filtered.

Heat the bearings to a uniform temperature nohigher than 250_ F (120_ C), and slide the bear-ings onto the shaft, one at a time, until they are fullyseated. This should be done quickly, in one con-tinuous motion, to prevent the bearings from cool-ing and sticking on the shaft.

Use caution when handling hot bear-ings to prevent burns.

NOTEPosition the inboard bearing (9) on the shaft as indi-cated by the following illustration.



INSTALLATION OF NEW DEPARTURE ORBCA/FEDERAL MOGAL 5300W SERIES BEARINGS

(OPEN OR ENCLOSED IMPELLERS)

INSTALLATION OF MRC/SKF 5300M ORFAFNIR 5300W SERIES BEARINGS

(OPEN OR ENCLOSED IMPELLERS)

LOADING

DIRECTION OFTHRUST

BALL LOADINGGROOVE POSITIONEDAWAY FROM IMPELLER

GROOVEDIRECTION OF

THRUST

LOADING

BALL LOADINGGROOVE POSITIONEDTOWARD IMPELLER

GROOVE

Figure 4. Inboard Bearing Positioning

After the bearings have been installed and allowedto cool, check to ensure that they have not movedaway from the shaft shoulders in shrinking. Ifmovement has occurred, use a suitable sizedsleeve and a press to reposition the bearingsagainst the shaft shoulders.

If heating the bearings is not practical, use a suit-able sized sleeve, and an arbor (or hydraulic) pressto install the bearings on the shaft.

When installing the bearings onto theshaft, never press or hit against the outerrace, balls, or ball cage. press only on theinner race.

Secure the outboard bearing (25) on the shaft withthe bearing retaining ring (19).

Slide the shaft (18) and assembled bearings (9 and25) into the bearing housing (8) until the retainingring on the outboard bearing seats against thebearing housing. Use caution not to roll or damagethe lip of the oil seal (5).

When installing the shaft and bearings intothe bearing bore, push against the outerrace. Never hit the balls or ball cage.

Press the outboard oil seal (12) into the bearingcap (16) with the lip positioned as shown in Figure2. Replace the bearing cap O-ring (24), and securethe bearing cap with the hardware (14 and 15). Becareful not to damage the oil seal lip on the shaftthreads.

Replace the rotating assembly O-ring (32).

NOTEImpeller shaft endplay should be between .002 and.010 inch (.051 to .254 mm). Tighten the bearingcap hardware tight enough to prevent leakage andobtain the correct endplay. Do not over-tighten.

Lubricate the bearing housing as indicated in LU-BRICATION.

Seal Reassembly and Installation

(Figures 2 and 5)

Clean the seal cavity and shaft with a cloth soakedin fresh cleaning solvent.

Most cleaning solvents are toxic andflammable. Use them only in a well ---ventilated area free from excessiveheat, sparks, and flame. Read and fol-low all precautions printed on solventcontainers.The seal is not normally reused because wear pat-terns on the finished faces cannot be realigned



during reassembly. This could result in prematurefailure. If necessary to reuse an old seal in an emer-gency, carefully wash all metallic parts in freshcleaning solvent and allow to dry thoroughly.

Handle the seal parts with extreme care to preventdamage. Be careful not to contaminate precisionfinished faces; even fingerprints on the faces canshorten seal life. If necessary, clean the faces with anon-oil based solvent and a clean, lint-free tissue.Wipe lightly in a concentric pattern to avoidscratching the faces.

Inspect the seal components for wear, scoring,grooves, and other damage that might cause leak-

age. Clean and polish the shaft sleeve, or replace itif there are nicks or cuts on either end. If any com-ponents are worn, replace the complete seal;never mix old and new seal parts.

If a replacement seal is being used, remove it fromthe container and inspect the precision finishedfaces to ensure that they are free of any foreignmatter.

To ease installation of the seal, lubricate the bel-lows and stationary seat O-rings with water or avery small amount of oil, and apply a drop of lightlubricating oil on the finished faces. Assemble theseal as follows, (see Figure 5).

SEAL PLATE

O-RINGS

IMPELLER

STATIONARY

STATIONARY

ROTATINGDRIVE BAND

BELLOWS

IMPELLER SHIMS

IMPELLER

SPRINGRETAINER

ELEMENT

ELEMENT

SEAT

SHAFT

SEAL SLEEVEO-RING

SHAFT SLEEVE

Figure 5. 46512---048 Seal Assembly

This seal is not designed for operation attemperatures above 160_ F (71_ C). Donot use at higher operating temperatures.

Lubricate the stationary seat O-rings with water orlight oil, and install them in the stationary seat. In-

stall the stationary seal element in the stationaryseat. Press this stationary subassembly into thefront of the seal plate until it seats squarely againstthe bore shoulder.

Install the seal plate gasket (4). Position the sealplate (3) and stationary seat over the shaft, and se-cure it to the bearing housing with the hardware (6and 7). Be careful not to damage the stationaryelement on the shaft threads.



Lubricate the seal sleeve (28) with a small amountof light oil and slide the rotating subassembly (con-sisting of rotating element, bellows and retainer),onto the sleeve until the rotating element in justflush with the undercut end of the sleeve.

Install the O-ring (27) which seals the sleeve to theshaft shoulder. Slide the sleeve and subassembledseal onto the shaft until the seal faces contact.Continue to push the sleeve through the seal untilthe undercut end seats against the O-ring andshaft shoulder.

Install the seal spring. Lubricate the seal as indi-cated in LUBRICATION after the impeller is in-stalled.

Impeller Installation

(Figure 2)

Inspect the impeller, and replace it if cracked orbadly worn. Inspect the impeller and shaft threadsfor dirt or damage, and clean or dress the threadsas required.

Install the same thickness of impeller adjustingshims (26) as previously removed, and screw theimpeller onto the shaft until tight.

NOTEAt the slightest sign of binding, immediately backthe impeller off, and check the threads for dirt. Donot try to force the impeller onto the shaft.

A clearance of .015 to .030 inch (0,38 to 0,76 mm)between the impeller and the seal plate is recom-mended for maximum pump efficiency. Measurethis clearance, and add or remove impeller adjust-ing shims as required. Preload the shaft in the di-rection of the impeller when checking this clear-ance.

NOTEIf the rotating assembly has been installed in thepump casing, this clearance may be measured byreaching through the priming port with a feelergauge.

Coat the threads of the impeller capscrew (30) with‘Never---Seez’ or equivalent compound and install

the impeller washer (29) and capscrew; torque thecapscrew to 90 ft. lbs. (1080 in. lbs. or 12,44 m.kg.).

Rotating Assembly Installation

(Figure 1)

A repair rotating assembly is shipped dryof lubricant. Refer to Lubrication at theend of this section before installing a repairrotating assembly.

Install the seal plate O-ring (30), and lubricate itand the rotating assembly O-ring (28) with lightgrease. Ease the rotating assembly into the pumpcasing using the installation tool. Be careful not todamage the O-rings.

Install the pump casing ring (13) and secure withthe inner hardware (16 and 17).

NOTEThe inner capscrews are 1/4 inch (3,2 mm) shorterthan the outer capscrews.

Install an equal thickness of rotating assemblyshims (12) under the casing ring, and secure thering to the pump casing with the outer hardware(14 and 15).

A clearance of .003 to .005 inch (0,08 to 0,13 mm)between the impeller and the wear plate is also rec-ommended for maximum pump efficiency. Thisclearance can be obtained by removing an equalamount of shims from each rotating assemblyshim set until the impeller binds against the wearplate when the shaft is turned. Preload the shaftin the direction of the impeller when checkingthis clearance. After the impeller binds, add .004inch of shims to each shim set.

NOTEAn alternate method of adjusting this clearance is toreach through the priming port with a feeler gaugeand measure the gap. Add or subtract rotating as-sembly shims accordingly.



After the face clearance has been set, tighten thehardware securing the rotating assembly to thepump casing.

Suction Check Valve Installation

(Figure 1)

Inspect the check valve assembly (50), and re-place it if badly worn.

NOTEThe check valve assembly must be replaced as acomplete unit. Individual parts are not sold sepa-rately.

Reach through the back cover opening with the as-sembled check valve, and position the check valvein the mounting slot in the suction flange (45). Alignthe adaptor with the flange hole, and secure the as-sembly with the check valve pin (51).

NOTEIf the suction or discharge flanges were removed,replace the respective gaskets, apply ‘PermatexAviation No. 3 Form-A-Gasket’ or equivalent com-pound to the mating surfaces, and secure them tothe pump casing with the attaching hardware.

Back Cover Installation

(Figure 1)

If the wear plate assembly (31) was removed for re-placement, carefully center it on the back cover(37) and secure it with the hardware (33 and 34).The wear plate must be concentric to prevent bind-ing when the back cover is installed.

Replace the back cover O-ring (35), and lubricate itwith a generous amount of No. 2 grease. Clean anyscale or debris from the contacting surfaces in thepump casing that might interfere or prevent a goodseal with the back cover. Slide the back cover as-sembly into the pump casing. Be sure the wearplate does not bind against the impeller.

NOTETo ease future disassembly, apply a film of greaseor ‘Never-Seez’ on the back cover shoulder, or any

surface which contacts the pump casing. This ac-tion will reduce rust and scale build-up.

Secure the back cover assembly (36) by tighteningthe hand nuts (43) evenly. Do not over-tighten thehand nuts; they should be just tight enough to en-sure a good seal at the back cover shoulder. Besure the wear plate does not bind against the cas-ing.

PRESSURE RELIEF VALVEMAINTENANCE

(Figure 1)

The back cover is equipped with a pressure reliefvalve (40) to provide additional safety for the pumpand operator (refer to Liquid Temperature AndOverheating in OPERATION).

It is recommended that the pressure relief valve as-sembly be replaced at each overhaul, or any timethe pump overheats and activates the valve. Neverreplace this valve with a substitute which has notbeen specified or provided by the Gorman-RuppCompany.

Periodically, the valve should be removed for in-spection and cleaning. When reinstalling the reliefvalve, apply ‘Loctite Pipe Sealant With Teflon No.592’, or equivalent compound, on the relief valvethreads. Position the valve as shown in Figure 1,with the discharge port pointing down.

LUBRICATION

A repair rotating assembly is shipped dryof lubricant. Refer to the following informa-tion for lubrication specifications.

Seal Assembly

(Figure 2)

Before starting the pump, remove the vented plug(10) and fill the seal cavity with approximately 90ounces (2,7 liters) of SAE No. 30 non-detergent oil(so it is above the level of the internal casting).



Clean and reinstall the vented plug. Maintain the oilat this level.

Bearings

(Figure 2)

The bearing housing was fully lubricated whenshipped from the factory. Check the oil level regu-larly through the sight gauge (20)and maintain it atthe middle of the gauge. When lubrication is re-quired, add SAE No. 30 non-detergent oil throughthe hole for the air vent (11). Do not over-lubricate.Over-lubrication can cause the bearings to over-heat, resulting in premature bearing failure.

NOTEThe white reflector in the sight gauge must be posi-tioned horizontally to provide proper drainage.

Under normal conditions, drain the bearing hous-ing once each year and refill with approximately 32

ounces (0,95 liters) of clean oil. Change the oilmore frequently if the pump is operated continu-ously or installed in an environment with rapid tem-perature change.

Monitor the condition of the bearing lubri-cant regularly for evidence of rust or mois-ture condensation. This is especially im-portant in areas where variable hot andcold temperatures are common.

For cold weather operation, consult the factory or alubricant supplier for the recommended grade ofoil.

Power Source

Consult the literature supplied with the powersource, or contact your local power source repre-sentative.

THE GORMAN-RUPP COMPANY F MANSFIELD, OHIOGORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

July 18, 1979

WARRANTY

Pumping units manufactured by The Gorman-Rupp Company,Mansfield, Ohio are guaranteed to be free from defects in mate-rial and workmanship for one year from date of shipment fromfactory in Mansfield, Ohio. The obligation under this Warranty,statutory or otherwise, is limited to replacement or repair atMansfield, Ohio factory or at a point designated by Gorman-Rupp, of such part as shall appear to us upon inspection at suchpoint, to have been defective in material or workmanship.

This Warranty does not obligate The Gorman-Rupp Company tobear the cost of labor or transportation charges in connectionwith replacement or repair of defective parts; nor shall it apply toa pump upon which repairs or alterations have been made un-less authorized by Gorman-Rupp.

No warranty is made in respect to engines, motors, or trade ac-cessories, such being subject to warranties of their respectivemanufacturers.

In Submersible Pumps, pump and motor are integral and Sub-mersibles are warranted as a unit. Since motor is subject to animportant degree upon quality and performance of electricalcontrols, unit warranty is valid only when controls have beenspecified and provided by Gorman-Rupp.

No express implied or statutory warranty, other than herein setforth is made or authorized to be made by Gorman-Rupp.

In no event shall The Gorman-Rupp Company be liable for con-sequential damages or contingent liabilities arising out of the fail-ure of any Gorman-Rupp pump or parts thereof to operate prop-erly.

THE GORMAN-RUPP COMPANY

Mansfield, Ohio

NOTE: In Canada, all above references to “The Gorman-RuppCompany, Mansfield, Ohio” is understood to mean “Gorman-Rupp of Canada Limited, St. Thomas, Ontario.”

ECopyright by the Gorman-Rupp Company

Manual U6B60 B

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