GORMAN-RUPP PUMPS PA Seris Installation, Operation And Maintenance Manual
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OM-06575-05
July 24, 2012
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
PA SERIES PUMP
MODEL
PA12A60-B
GORMAN‐RUPP PUMPS
www.grpumps.com
2012 Gorman‐Rupp Pumps Printed in U.S.A.
Register your new
Gorman‐Rupp pump online at www.grpumps.com
Valid serial number and e‐mail address required.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your pump model and serial number in the spaces provided below. Your Gorman‐Rupp distributor needs this information when you require parts or service.
Pump Model:
Serial Number:
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE I - 1
SAFETY ‐ SECTION A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE A - 1
INSTALLATION - SECTION B
PREINSTALLATION INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POSITIONING PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUCTION AND DISCHARGE PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connections to Pump
Gauges
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUCTION LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fittings
Strainers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sealing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Lines In Sumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Line Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISCHARGE LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Siphoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coupled Drives
Drive Belts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DRIVE BELT TENSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Rules of Tensioning
COLD WEATHER INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION - SECTION C
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PAGE C - 1
STARTING
Rotation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRIMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Vacuum Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Temperature And Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strainer Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BEARING TEMPERATURE CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COLD WEATHER PRESERVATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING - SECTION D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE C - 1
PAGE C - 1
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PAGE C - 2
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PAGE D - 1
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE D - 3
PUMP MAINTENANCE AND REPAIR ‐ SECTION E . . . . . . . . . . . . . . . . .
STANDARD PERFORMANCE CURVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE E - 1
PAGE E - 1 i
TABLE OF CONTENTS
(continued)
PARTS LISTS:
Pump Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Endl Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Priming Chamber Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Assembly Machining Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .
Priming Chamber Removal And Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharge Check Valve Removal and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Head And Wear Ring Removal
Pump Casing Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedestal Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Removal and Disassembly
Bearing Cleaning And Inspection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Reassembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Reassembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Casing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Head And Wear Ring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharge Check Valve Assembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . .
Priming Chamber Assembly And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PAGE E - 19 ii
PA SERIES
OM-06575
INTRODUCTION
Thank You for purchasing a Gorman‐Rupp pump.
Read this manual carefully to learn how to safely install and operate your pump. Failure to do so could result in personal injury or damage to the pump.
This pump is a PA Series, priming‐assisted centrif ugal model. The unit is designed for handling non‐ volatile, non‐flammable liquids containing speci fied entrained solids. The basic material of con struction is ductile iron with stainless steel shaft and ductile iron wearing parts.
Because pump installations are seldom identical, this manual cannot possibly provide detailed in structions and precautions for every aspect of each specific application. Therefore, it is the re sponsibility of the owner/installer of the pump to ensure that applications not addressed in this manual are performed only after establishing that neither operator safety nor pump integrity are com promised by the installation. Pumps and related equipment must be installed and operated ac cording to all national, local and industry stan dards.
If there are any questions regarding the pump which are not covered in this manual or in other lit erature accompanying the unit, please contact your Gorman‐Rupp distributor or the Gorman‐
Rupp Company:
The Gorman‐Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901-1217
Phone: (419) 755-1011 or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631-2870
The following are used to alert personnel to proce dures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards which WILL result in severe personal injury or death. These instructions describe the procedure re quired and the injury which will result from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury or death. These instructions describe the procedure required and the injury which could result from failure to follow the procedure.
Hazards or unsafe practices which COULD result in minor personal injury or product or property damage. These instructions de scribe the requirements and the possible damage which could result from failure to follow the procedure.
NOTE
Instructions to aid in installation, operation, and maintenance or which clarify a procedure .
For information or technical assistance on the power source, contact the power source manufac turer's local dealer or representative.
INTRODUCTION PAGE I - 1
PA SERIES OM-06575
SAFETY ‐ SECTION A
This information applies to Prime Aire
Series pumps. Gorman‐Rupp has no control over or particular knowledge of the power source which will be used.
Refer to the manual accompanying the power source before attempting to be gin operation.
sive, or flammable materials which may damage the pump or endanger person nel as a result of pump failure.
Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and pre cautions for each specific application.
Therefore, it is the owner/installer's re sponsibility to ensure that applications not addressed in this manual are per formed only after establishing that nei ther operator safety nor pump integrity are compromised by the installation.
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.
Before attempting to open or service the pump:
1. Familiarize yourself with this man ual.
2. Disconnect or lock out the power source to ensure that the pump will remain inoperative.
3. Allow the pump to completely cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cau tiously.
7. Drain the pump.
Death or serious personal injury and damage to the pump or components can occur if proper lifting procedures are not observed. Make certain that hoists, chains, slings or cables are in good working condition and of suffi cient capacity and that they are posi tioned so that loads will be balanced and the pump or components will not be damaged when lifting. Suction and dis charge hoses and piping must be re moved from the pump before lifting. Lift the pump or component only as high as necessary and keep personnel away from suspended objects.
Do not operate the pump without the guards in place over the rotating parts.
Exposed rotating parts can catch cloth ing, fingers, or tools, causing severe in jury to personnel.
This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids.
Do not attempt to pump volatile, corro
SAFETY
Do not remove plates, covers, gauges, pipe plugs, or fittings from an over heated pump. Vapor pressure within the pump can cause parts being disen
PAGE A - 1
OM-06575 PA SERIES gaged to be ejected with great force. Al low the pump to cool before servicing.
Do not operate the pump against a closed discharge valve for long periods of time. If operated against a closed dis charge valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
Do not attempt to disengage any part of an overheated pump unit. Vapor pres sure within the pump casing can eject these parts with great force when they are disengaged. Allow the pump to completely cool before servicing it.
Pumps and related equipment must be in stalled and operated according to all na tional, local and industry standards.
PAGE A - 2 SAFETY
PA SERIES OM-06575
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and ar range the pump and piping.
Most of the information pertains to a standard static lift application where the pump is positioned above the free level of liquid to be pumped.
If installed in a flooded suction application where the liquid is supplied to the pump under pressure, some of the information such as mounting, line configuration, and priming must be tailored to the specific application. Since the pressure supplied to the pump is critical to performance and safety, be sure to limit the incoming pressure to 50% of the maximum permissible operating pressure as shown on the pump performance curve.
For further assistance, contact your Gorman‐Rupp distributor or the Gorman‐Rupp Company.
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, damaged threads, 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 tags, decals, and markings on the pump assembly, and perform all duties indicated. Note that the pump shaft rotates in the required direction.
Only operate this pump in the direction in
INSTALLATION dicated by the arrow on the pump body and on the accompanying decal. Other wise, the impeller could become loosened from the shaft and seriously damage the pump.
d. Check levels and lubricate as necessary. Re fer to LUBRICATION in the Maintenance and
Repair Manual and perform duties as in structed.
e. If the pump has been stored for more than 12 months, some of the components or lubri cants may have exceeded their maximum shelf life. These must be inspected or re placed to ensure maximum pump service.
If the maximum shelf life has been exceeded, or if anything appears to be abnormal, contact your
Gorman‐Rupp distributor or the factory to deter mine the repair or updating policy. Do not put the pump into service until appropriate action has been taken.
POSITIONING PUMP
Lifting
Death or serious personal injury and damage to the pump or components can occur if proper lifting procedures are not observed. Make certain that hoists, chains, slings or cables are in good working condition and of suffi cient capacity and that they are posi tioned so that loads will be balanced and the pump or components will not be damaged when lifting. Suction and dis charge hoses and piping must be re moved from the pump before lifting. Lift the pump or component only as high as necessary and keep personnel away from suspended objects.
PAGE B - 1
OM-06575 PA SERIES
Pump unit weights will vary depending on the mounting and drive provided. Check the shipping tag on the unit packaging for the actual weight, and use lifting equipment with appropriate capacity.
Drain the pump and remove all customer‐installed equipment such as suction and discharge hoses or piping before attempting to lift existing, installed units.
Mounting
Locate the pump in an accessible place as close as practical to the liquid being pumped. Level mount ing is essential for proper operation.
The pump may have to be supported or shimmed to provide for level operation or to eliminate vibra tion.
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 your overall application allows pump to operate within the safe operation range.
Materials
Either pipe or hose maybe used for suction and discharge lines; however, the materials must be compatible 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 as possible 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 into
PAGE B - 2 place 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 could cause excessive vibration, decreased bearing life, and increased shaft and seal wear. If hose‐type lines are used, they should have adequate support to secure them when filled with liquid and under pressure.
Gauges
The pump is drilled and tapped for installing dis charge pressure and vacuum suction gauges. It is recommended that gauges be installed to monitor pump performance. Seal the gauge threads with pipe dope to ensure an airtight seal. Follow the sealant manufacturer's recommendations when selecting and applying the pipe dope. The pipe dope should be compatible with the liquid being pumped.
SUCTION LINES
To avoid air pockets which could affect pump prim ing, the suction line must be as short and direct as possible. When operation involves a suction lift, the line must always slope upward to the pump from the source of the liquid being pumped; if the line slopes down to the pump at any point along the suction run, air pockets will be created.
Fittings
Suction lines should be the same size as the pump inlet. If reducers are used in suction lines, they should be the eccentric type, and should be in stalled with the flat part of the reducers uppermost to 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
Be certain to use the strainer furnished with the pump; any spherical solids which pass through the strainer will also pass through the pump itself.
If a strainer not furnished with the pump is installed by the pump user, make certain that the total area
INSTALLATION
PA SERIES OM-06575 of the openings in the strainer is at least three or four times the cross section of the suction line, and that the openings will not permit passage of solids larger than the solids handling capability of the pump.
This pump is designed to handle up to 3 inch (76,2 mm) diameter spherical solids.
Sealing
Since even a slight leak will affect priming, head, and capacity, especially when operating with a high suction lift, all connections in the suction line should be sealed with pipe dope to ensure an air tight seal. Follow the sealant manufacturer's rec ommendations when selecting and applying the pipe dope. The pipe dope should be compatible with the liquid being pumped.
Suction Lines In Sumps
If a single suction line is installed in a sump, it should be positioned away from the wall of the sump 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 the sump, the flow should be kept away from the suc tion inlet because the inflow will carry air down into the 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 the suction inlet at a distance 1‐1/2 times the diameter of the suction pipe. The baffle will allow entrained air to escape from the liquid before it is drawn into the suction inlet.
If two suction lines are installed in a single sump, the flow paths may interact, reducing the efficiency of one or both pumps. To avoid this, position the suction inlets so that they are separated by a dis tance equal to at least 3 times the diameter of the suction pipe.
Suction Line Positioning
The depth of submergence of the suction line is critical to efficient pump operation. Figure 1 shows recommended minimum submergence vs.
velocity.
Although not recommended, the vacuum assisted priming feature allows the pump to be operated temporarily in a “slurping” application with varying water levels.
NOTE
The pipe submergence required may be reduced by installing a standard pipe increaser fitting at the end of the suction line. The larger opening size will reduce the inlet velocity. Calculate the required submergence using the following formula based on the increased opening size (area or diameter).
INSTALLATION PAGE B - 3
OM-06575 PA SERIES
Figure 1. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower than 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 pump could result.
Valves
This pump is designed with a check valve in the discharge line.
If a throttling valve is desired in the discharge line, use a valve as large as the largest pipe to minimize friction losses. Never install a throttling valve in a suction line.
With high discharge heads, it is recommended that a throttling valve be installed in the discharge line to protect the pump from excessive shock pres sure and reverse rotation when it is stopped.
PAGE B - 4
If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.
ALIGNMENT
The alignment of the pump and its power source is critical for trouble‐free mechanical operation. In either a flexible coupling or V‐belt driven system, the driver and pump must be mounted so that their shafts are aligned with and parallel to each other. It is imperative that alignment be checked after the pump and piping are installed, and before opera tion.
NOTE
Check Rotation , Section C, before final alignment of the pump.
When mounted at the Gorman‐Rupp factory, driver and pump are aligned before shipment. Misalign ment will occur in transit and handling. Pumps
INSTALLATION
PA SERIES must be checked and realigned before operation.
Before checking alignment, tighten the foundation bolts. The pump casing feet and/or pedestal feet, and the driver mounting bolts should also be tightly secured.
OM-06575
When checking alignment, disconnect the power source to ensure that the pump will remain inoperative.
Adjusting the alignment in one direction may alter the alignment in another direc tion. check each procedure after altering alignment.
Coupled Drives
When using couplings, the axis of the power source must be aligned to the axis of the pump shaft in both the horizontal and vertical planes.
Most couplings require a specific gap or clearance between the driving and the driven shafts. Refer to the coupling manufacturer's service literature.
Align spider insert type couplings by using calipers to measure the dimensions on the circumference of the outer ends of the coupling hub every 90 .
The coupling is in alignment when the hub ends are the same distance apart at all points (see Fig ure 2).
Figure 3. Aligning Non‐Spider Type Couplings
Align non‐spider type couplings by using a feeler gauge or taper gauge between the coupling halves every 90 . The coupling is in alignment when the hubs are the same distance apart at all points (see
Figure 3).
Check parallel adjustment by laying a straightedge across both coupling rims at the top, bottom, and side. When the straightedge rests evenly on both halves of the coupling, the coupling is in horizontal parallel alignment. If the coupling is misaligned, use a feeler gauge between the coupling and the straightedge to measure the amount of misalign ment.
Drive Belts
When using drive belts, the power source and the pump must be parallel. Use a straightedge along the sides of the pulleys to ensure that the pulleys are properly aligned (see Figure 4). In drive sys tems using two or more belts, make certain that the belts are a matched set; unmatched sets will cause accelerated belt wear.
Figure 2. Aligning Spider‐Type Couplings
INSTALLATION
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure 4. Alignment of V‐Belt Driven Pumps
PAGE B - 5
OM-06575 PA SERIES
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 be excessive power loss and possible bearing failure.
Select pulleys that will match the proper speed ra tio; overspeeding the pump may damage both pump and power source.
Do not operate the pump without the guard in place over the rotating parts .
exposed rotating parts can catch cloth ing, fingers, or tools, causing severe in jury to personnel.
DRIVE BELT TENSIONING
General Rules of Tensioning
For new drive belts, check the tension after 5, 20 and 50 hours of operation and re‐tension as re quired (see the following procedure for measuring belt tension). Thereafter, check and re‐tension if re quired monthly or at 500 hour intervals, whichever comes first.
Ideal drive belt tension is the lowest tension at which the belt will not slip under peak load condi tions. Do not over‐tension drive belts. Over‐ten sioning will shorten both drive belt and bearing life.
Under‐tensioning will cause belt slippage. Always keep belts free from dirt, grease, oil and other for eign material which may cause slippage.
COLD WEATHER INSTALLATION
If the pump is to be installed in an environment where sub‐freezing temperatures will occur during operation, consideration must be given to prevent the pump and components from freezing when the pump is idle between pumping cycles. With Gor man‐Rupp priming assisted pumps, there are two methods of accomplishing this.
One method is through the use of an optional heat ed priming chamber, which is available as a facto ry‐installed option or as a retrofit kit for most mod els (consult the factory). This method pumps heat ed liquid from the engine cooling system through the priming chamber to heat the chamber and its contents. This method is particularly effective where pumping cycles are short enough to ensure that the liquid in the priming chamber never fully freezes.
The second method involves configuring the pumping system to drain both the priming cham ber and pump casing after each pumping cycle.
With no liquid remaining in the system, freezing cannot occur.
To configure the pump to drain between pumping cycles, the first step is to remove the check valve from the line that runs between the top of the prim ing hopper and the priming venturi. This check valve is located close to the venturi end of the line.
Remove the check valve, then reconnect the line directly to the venturi. This will allow air to enter the pump through the top of the priming hopper when the pump shuts off, providing for complete drainage of the pump and priming hopper.
Next, install a drain line between the pump drain and the wet well or sump. This line must remain submerged in the liquid below the pump down lev el of the liquid level control device; otherwise, the pump may not prime. If the application involves liq uids that could clog the drain line, make sure to check the line periodically to ensure it remains open; otherwise, liquid could remain in the casing, resulting in freezing and potential damage to the pumping system.
Configuring the system to drain between cycles will help ensure that the pump will not freeze during cold weather applications. However, it should be noted that the time required for the pump to be gin to discharge liquid will increase, as the pump will have to fully re‐prime at the beginning of each pumping cycle.
PAGE B - 6 INSTALLATION
PA SERIES OM-06575
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and decals attached to the pump.
If rotation is incorrect on a three‐phase motor, have a qualified electrician interchange any two of the three phase wires to change direction. If rotation is incorrect on a single‐phase motor, consult the liter ature supplied with the motor for specific instruc tions.
This pump is designed to handle liquids containing large entrained solids and slurries. Do not attempt to pump vola tile, corrosive, or flammable liquids which may damage the pump or endan ger personnel as a result of pump fail ure.
Pump speed and operating conditions must be within the performance range shown on page E‐1.
STARTING
Consult the operations manual furnished with the power source.
Rotation
The correct direction of pump rotation is counter clockwise when facing the impeller. The pump could be damaged and performance adversely af fected by incorrect rotation. If pump performance is not within the specified limits (see the curve on page E‐1), check the direction of power source ro tation before further troubleshooting.
If an electric motor is used to drive the pump, re move V‐belts, couplings, or otherwise disconnect the pump from the motor before checking motor rotation. Operate the motor independently while observing the direction of the motor shaft, or cool ing fan.
OPERATION
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 securely mounted. Check that the pump is properly lubri cated (see LUBRICATION in MAINTENANCE
AND REPAIR ).
The pump will begin to prime upon startup. The air in the suction line will be discharged from the educ tor discharge line. Complete priming is indicated by a positive discharge pressure reading.
If full priming is not achieved, the discharge check valve may be malfunctioning. If this occurs, shut down the pump and consult Maintenance and
Repair, Section E for further details.
OPERATION
Leakage
Once the pump is fully primed, no leakage should be visible at pump mating surfaces, or at pump connections or fittings. Keep all line connections and fittings tight to maintain maximum pump effi ciency.
Pump Vacuum Check
Read the vacuum gauge with the pump primed and at operation speed. Shut off the pump. The vacuum gauge reading will immediately drop pro portionate to static suction lift, and should then sta bilize. If the vacuum reading falls off rapidly after stabilization, an air leak exists. Before checking for the source of the leak, check the point of installa tion of the vacuum gauge.
PAGE C - 1
OM-06575 PA SERIES
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160 F (71 C). Do not apply it at a higher operating temperature.
Overheating can occur if operated with the valves in the suction or discharge lines closed. Operating against closed valves could bring the liquid to a boil, build pressure, and cause the pump to rup ture or explode. If overheating occurs, stop the pump immediately and allow it to completely cool before servicing it.
Approach any over‐heated pump cautiously .
flow rate begins to drop. Monitor and record the vacuum suction gauge readings regularly to detect strainer blockage.
Never introduce air or steam pressure into the pump casing or piping to remove a blockage. This could result in personal injury or damage to the equipment. If backflushing is absolutely neces sary, liquid pressure must be limited to 50% of the maximum permissible operating pressure shown on the pump performance curve.
STOPPING
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly, damaging shock waves can be transmitted to the pump and piping system. Close all connecting valves slowly.
Allow an over‐heated pump to com pletely cool before servicing. Do not re move plates, covers, gauges, or fittings from an overheated pump. Liquid within the pump can reach boiling tempera tures, and vapor pressure within the pump can cause parts being disen gaged to be ejected with great force. Af ter the pump cools, drain the liquid from the pump by removing the casing drain plug. Use caution when removing the plug to prevent injury to personnel from hot liquid.
As a safeguard against rupture or explosion due to heat, this pump is equipped with a pressure relief valve which will open if vapor pressure within the pump casing reaches a critical point. If over‐heat ing does occur, stop the pump immediately and al low it to cool before servicing it.
Approach any over‐heated pump cautiously . It is recom mended that the pressure relief valve assembly be replaced at each overhaul, or any time the pump casing over‐heats and activates the valve. Never replace this valve with a substitute which has not been specified or provided by the Gorman‐Rupp
Company.
Strainer Check
Check the strainer regularly, and clean it as neces sary. The strainer should also be checked if pump
PAGE C - 2
If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.
After stopping the pump, lock out or disconnect the power source to ensure that the pump will re main inoperative.
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 considered normal for bearings, and they can operate safely to at 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 thermometer against the housing. Record this temperature for future reference.
A sudden increase in bearing temperatures is a warning that the bearings are at the point of failing to operate properly. Make certain that the bearing lubricant is of the proper viscosity and at the cor rect level (see LUBRICATION in the Maintenance and Repair Manual). Bearing overheating can also be caused by shaft misalignment and/or excessive vibration.
OPERATION
PA SERIES OM-06575
When pumps are first started, the bearings may seem to run at temperatures above normal. Con tinued operation should bring the temperatures down to normal levels.
COLD WEATHER PRESERVATION
If the pump will be idle for an extended period of time in below freezing conditions, drain the pump and priming hopper to prevent damage from freez ing. Also, clean out any solids by flushing with a hose. Operate the pump for approximately one minute; this will remove any remaining liquid that could freeze the pump rotating parts. If the pump will be idle for more than a few hours, or if it has been pumping liquids containing a large amount of solids, drain the pump, and flush it thoroughly with clean water. To prevent large solids from clogging the drain port and preventing the pump from com pletely draining, insert a rod or stiff wire in the drain port, and agitate the liquid during the draining process. Clean out any remaining solids by flush ing with a hose.
If the pump is to be installed in an environment where sub‐freezing temperatures will occur during operation, consideration must be given to prevent the pump and components from freezing when the pump is idle between pumping cycles. Refer to
COLD WEATHER INSTALLATION in the Installa tion section of this manual for details.
OPERATION PAGE C - 3
PA SERIES
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
OM-06575
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power source to ensure that the pump will remain inoperative.
3. Allow the pump to completely cool if overheated.
4. Check the temperature and make sure pump is cool before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
TROUBLE
PUMP FAILS TO
PRIME
POSSIBLE CAUSE
Discharge check valve contami nated, damaged, or unable to seat.
Air leak in suction line.
Lining of suction hose collapsed.
PROBABLE REMEDY
Clean or replace check valve.
Correct leak.
Replace suction hose.
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
Leaking or worn seal or pump gasket.
Check pump vacuum. Replace leaking or worn seal or gasket.
Suction lift or discharge head too high.
Check piping installation and install bypass line if needed. See INSTAL
LATION .
Air compressor damaged or belts bro ken.
Strainer clogged.
Check and repair/replace.
Check strainer and clean if neces sary.
Check and clean eductor.
Eductor clogged.
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. Replace leaking or worn seal or gasket.
TROUBLESHOOTING PAGE D - 1
OM-06575 PA SERIES
TROUBLE
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY
POSSIBLE CAUSE
Strainer clogged.
Discharge check valve clogged.
Suction intake not submerged at proper level or sump too small.
Impeller or other wearing parts worn or damaged.
Impeller clogged.
Discharge head too high.
Suction lift too high.
Pump speed too slow.
Belt or flexible coupling broken.
Pump speed too high.
Discharge head too low.
PROBABLE REMEDY
Check strainer and clean if neces sary.
Check and clean check valve.
Check installation and correct submergence as needed.
Replace worn or damaged parts.
Check that impeller is properly centered and rotates freely.
Free impeller of debris.
Install bypass line.
Measure lift w/vacuum gauge. Re duce lift and/or friction losses in suction line.
Check driver output; check belts or couplings for slippage.
Check and replace as necessary.
Check driver output; check that sheaves or couplings are correctly sized.
Adjust discharge valve.
Liquid solution too thick.
Pump or jack shaft bearing(s) frozen.
Dilute if possible.
Disassemble, check and replace bearing(s) as required..
Discharge flow too slow.
Open discharge valve fully to in crease flow rate, and run engine at maximum governed speed.
Clean valve.
Suction check valve or foot valve clogged or binding.
Liquid solution too thick.
EXCESSIVE NOISE Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
Dilute if possible.
Reduce suction lift and/or friction losses in suction line. Record vac uum and pressure gauge readings and consult local representative or factory.
Locate and eliminate source of air bubble.
Secure mounting hardware.
Clean out debris; replace damaged parts.
PAGE D - 2 TROUBLESHOOTING
PA SERIES OM-06575
TROUBLE
BEARINGS RUN
TOO HOT
POSSIBLE CAUSE
Bearing temperature is high, but within limits.
Low or incorrect lubricant.
Suction and discharge lines not prop erly supported.
Drive misaligned.
Excessive tension on drive belt.
PROBABLE REMEDY
Check bearing temperature regu larly to monitor any increase.
Check for proper type and level of lubricant.
Check piping installation for proper support.
Align drive properly.
Check belt tension. Adjust as required.
PREVENTIVE MAINTENANCE
Since pump applications are seldom identical, and pump wear is directly affected by such things as the abrasive qualities, pressure and temperature of the liquid being pumped, this section is intended only to provide general recommendations and practices for preventive maintenance. Regardless of the application however, following a routine pre ventive maintenance schedule will help assure trouble‐free performance and long life from your
Gorman‐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 a good preventive maintenance program. Changes in suction and discharge gauge readings (if so equipped) between regularly scheduled inspec tions can indicate problems that can be corrected before system damage or catastrophic failure oc curs. The appearance of wearing parts should also be documented at each inspection for comparison as well. Also, if records indicate that a certain part
(such as the seal) fails at approximately the same duty cycle, the part can be checked and replaced before failure occurs, reducing unscheduled down time.
For new applications, a first inspection of wearing parts at 250 hours will give insight into the wear rate for your particular application. Subsequent inspec tions should be performed at the intervals shown on the chart below. Critical applications should be inspected more frequently.
TROUBLESHOOTING PAGE D - 3
OM-06575 PA SERIES
Item
Preventive Maintenance Schedule
Daily
Service Interval*
Weekly Monthly Semi‐
Annually
Annually
General Condition (Temperature, Unusual
Noises or Vibrations, Cracks, Leaks,
Loose Hardware, Etc.)
Pump Performance (Gauges, Speed, Flow)
Bearing Lubrication
Seal Lubrication (And Packing Adjustment,
If So Equipped)
V‐Belts (If So Equipped)
Air Release Valve Plunger Rod (If So Equipped)
Front Impeller Clearance (Wear Plate)
Rear Impeller Clearance (Seal Plate)
Check Valve
Pressure Relief Valve (If So Equipped)
Pump and Driver Alignment
Shaft Deflection
Bearings
Bearing Housing
Piping
Driver Lubrication - See Mfgr's Literature
I
I
I
I
I
I
C
I
I
R
R
I
I
I
C
I
I
I
Legend:
I = Inspect, Clean, Adjust, Repair or Replace as Necessary
C = Clean
R = 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.
PAGE D - 4 TROUBLESHOOTING
PA SERIES OM-06575
PUMP MAINTENANCE AND REPAIR - SECTION E
MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK
OPERATING PERFORMANCE.
Based on 70
STANDARD PERFORMANCE FOR PUMP MODEL PA12A60-B
F (21 C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be dif ferent due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
Contact the Gorman‐Rupp Company to verify per formance or part numbers.
If your pump serial number is followed by an “N”, your pump is NOT a standard production model.
Pump speed and operating condition points must be within the continuous per formance range shown on the curve.
MAINTENANCE & REPAIR PAGE E - 1
OM-06575
PARTS PAGE
ILLUSTRATION
2
15
14
13
12
20 19 18
16
17
7
6
11
1
10
3
4
PA SERIES
5
3
6
7
8
9
PAGE E - 2
Figure 1. PA12A60-B Pump Model Assembly
MAINTENANCE & REPAIR
PA SERIES OM-06575
ITEM
NO.
3
4
5
1
2
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PART NAME
PUMP END ASSEMBLY
PRIMING CHAMBER ASSEMBLY
GASKET
HEX HEAD CAP SCREW
HEX HEAD CAP SCREW
LOCK WASHER
HEX NUT
CHECK VALVE 12"
-FLAPPER
-GASKET
-O‐RING
DRAIN VALVE ASSY
PIPE PLUG
12" SPOOL
GASKET
4" BLIND FLANGE ASSEMBLY
LOCK WASHER
HEX HEAD CAP SCREW
BAFFLE
GASKET
LOCK WASHER
STUD
HEX NUT
PARTS LIST
Pump Model PA12A60-B
(From S/N 1650474 Up)
PART
NUMBER
QTY
46133-640
46112-709
4991G 18000
B1413 15991
B1416 15991
J14 15991
D14 15991
26642-128
26688-003
26688-004
25152-469
46346-262
P04 15079
38642-622 10000
25113-034 1
42111-358 1
J10 15991
B1007 15991
8
8
1
1
1
1
1
31113-011 17000
38687-053 19060
J08 15991
C0809 15991
D08 15991
1
1
4
4
4
1
1
2
12
12
24
24
1
1
INDICATES PARTS RECOMMENDED FOR STOCK
MAINTENANCE & REPAIR PAGE E - 3
OM-06575
ILLUSTRATION
PA SERIES
SEE FIG. 3
PAGE E - 4
Figure 2. Pump End Assembly
MAINTENANCE & REPAIR
PA SERIES OM-06575
PARTS LIST
Pump End Assembly
PART
NUMBER
QTY ITEM
NO.
PART NAME ITEM
NO.
PART NAME
1 PUMP CASING
3 SEAL ASSEMBLY
4 STUD
5 STUD
SEE NOTE BELOW
2 IMPLLR/WEAR RING ASSY 46151-022 24110
-WEAR RING 4182A 11030
1
46512-109 1
C1013 15991 3
C1011 15991 9
1
1
6 GASKET
7 SCKT HD CAP SCREW
38674-434 18000
BD1206 15990
1
1
8 IMPELLER WASHER 31167-012 15030 1
9 ROLL PIN
10 HOSE CLAMP
S2197 1
26518-642 2
11 MALE CONNECTOR 26523-409 2
12 BOT OILER BRCKT ASSY 41881-811 24150 1
13 FLAT WASHER
14 LOCK WASHER
15 HEX NUT
16 MACHINE SCREW
K10 15991
J10 15991
D10 15991
X0405 15991
1
22
24
2
17 LOCK WASHER
18 SIGHT GAUGE
J04 15991
S1471
19 VENTED PIPE PLUG
20 PEDESTAL
21 PIPE PLUG
38649-009 15079
38257-520 10000
P04 15079
22 HEX HEAD CAP SCREW B0605 15991
2
2
1
1
1
12
23 OIL SEAL
24 BEARING CAP
25258-845 3
38322-429 10000 1
25 O‐RING
26 SHIM SET
27 BEARING LOCKNUT
25152-249 1
48261-055 1
23962-015 1
28 BEARING LOCK WASHER 23962-515 1
29 BEARING CAP GASKET 4184G 18000 1
30 BALL BEARING 23413-015 2
31 KEY
32 IMPELLER SHAFT
33 KEY
N1016 15990
38512-522 17040
N0809 15990
1
1
1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR
PUMP CASING ASSY
46474-902 1
PART
NUMBER
QTY
34 ROLLER BEARING
35 BEARING CAP
36 AIR VENT
37 O‐RING
38 PIPE CPLG 3/8
39 PIPE NIPPLE
40 SEAL PLATE
41 PIPE PLUG
42 SHIM SET
43 PIPE PLUG
44 PIPE PLUG
45 SEAL PLATE COVER
25151-266 1
AE06 15079
T0608 15079
38272-717 10000
P12 15079
48261-033
P06 15079
P24 10009
38242-708 10000
1
46 HEX HEAD CAP SCREW B0503-1/2 15991
47 LOCK WASHER J05 15991
48 .38 I.D. x 11” LG HOSE
49 SUCTION HEAD
50 SPIRAL PIN
18513-054 1
4180 10010
21137-123
1
3
6
6
1
1
2
REF
2
1
1
51 WEAR RING 4181A 14000 1
52 GASKET
53 STUD
54 BOTTLE OILER
55 SNAP RING
56 DRIVE SCREW
57 NAMEPLATE BLANK
NOT SHOWN:
SUCTION STICKER
ROTATION DECAL
STRAINER
G‐R DECAL
WARNING DECAL
INSTRUCTION TAG
LUBRICATION DECAL
INSTRUCTION TAG
OIL LEVEL DECAL
DISCHARGE STICKER
23528-005 1
38322-425 10010
S1703
1
1
4180G 18000
C1009 15991
1
12
26713-004 1
24124-057 1
BM#04-03 17000
38819-002 13000
4
1
6588AG
46641-012 24150
GR-06
2613FE
6588BJ
1
2613M 1
1
1
1
38817-024 1
38816-079 1
38817-011 1
38816-123 1
1
MAINTENANCE & REPAIR PAGE E - 5
OM-06575
ILLUSTRATION
PA SERIES
SEE FIG. 2
PAGE E - 6
Figure 3. Pump End Assembly (Cont'd)
MAINTENANCE & REPAIR
PA SERIES OM-06575
PARTS LIST
Pump End Assembly (Cont'd)
PART
NUMBER
QTY ITEM
NO.
PART NAME ITEM
NO.
PART NAME
1 PUMP CASING
3 SEAL ASSEMBLY
4 STUD
5 STUD
SEE NOTE BELOW
2 IMPLLR/WEAR RING ASSY 46151-022 24110
-WEAR RING 4182A 11030
1
46512-109 1
C1013 15991 3
C1011 15991 9
1
1
6 GASKET
7 SCKT HD CAP SCREW
38674-434 18000
BD1206 15990
1
1
8 IMPELLER WASHER 31167-012 15030 1
9 ROLL PIN
10 HOSE CLAMP
S2197 1
26518-642 2
11 MALE CONNECTOR 26523-409 2
12 BOT OILER BRCKT ASSY 41881-811 24150 1
13 FLAT WASHER
14 LOCK WASHER
15 HEX NUT
16 MACHINE SCREW
K10 15991
J10 15991
D10 15991
X0405 15991
1
22
24
2
17 LOCK WASHER
18 SIGHT GAUGE
J04 15991
S1471
19 VENTED PIPE PLUG
20 PEDESTAL
21 PIPE PLUG
38649-009 15079
38257-520 10000
P04 15079
22 HEX HEAD CAP SCREW B0605 15991
2
2
1
1
1
12
23 OIL SEAL
24 BEARING CAP
25258-845 3
38322-429 10000 1
25 O‐RING
26 SHIM SET
27 BEARING LOCKNUT
25152-249 1
48261-055 1
23962-015 1
28 BEARING LOCK WASHER 23962-515 1
29 BEARING CAP GASKET 4184G 18000 1
30 BALL BEARING 23413-015 2
31 KEY
32 IMPELLER SHAFT
33 KEY
N1016 15990
38512-522 17040
N0809 15990
1
1
1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR
PUMP CASING ASSY
46474-902 1
PART
NUMBER
QTY
34 ROLLER BEARING
35 BEARING CAP
36 AIR VENT
37 O‐RING
38 PIPE CPLG 3/8
39 PIPE NIPPLE
40 SEAL PLATE
41 PIPE PLUG
42 SHIM SET
43 PIPE PLUG
44 PIPE PLUG
45 SEAL PLATE COVER
25151-266 1
AE06 15079
T0608 15079
38272-717 10000
P12 15079
48261-033
P06 15079
P24 10009
38242-708 10000
1
46 HEX HEAD CAP SCREW B0503-1/2 15991
47 LOCK WASHER J05 15991
48 .38 I.D. x 11” LG HOSE
49 SUCTION HEAD
50 SPIRAL PIN
18513-054 1
4180 10010
21137-123
1
3
6
6
1
1
2
REF
2
1
1
51 WEAR RING 4181A 14000 1
52 GASKET
53 STUD
54 BOTTLE OILER
55 SNAP RING
56 DRIVE SCREW
57 NAMEPLATE BLANK
NOT SHOWN:
SUCTION STICKER
ROTATION DECAL
STRAINER
G‐R DECAL
WARNING DECAL
INSTRUCTION TAG
LUBRICATION DECAL
INSTRUCTION TAG
OIL LEVEL DECAL
DISCHARGE STICKER
23528-005 1
38322-425 10010
S1703
1
1
4180G 18000
C1009 15991
1
12
26713-004 1
24124-057 1
BM#04-03 17000
38819-002 13000
4
1
6588AG
46641-012 24150
GR-06
2613FE
6588BJ
1
2613M 1
1
1
1
38817-024 1
38816-079 1
38817-011 1
38816-123 1
1
MAINTENANCE & REPAIR PAGE E - 7
OM-06575
ILLUSTRATION
PA SERIES
4
5
6
2
3
ITEM
NO.
1
PART NAME
Figure 4. Priming Chamber Assembly
PARTS LIST
PRIMING VALVE
-ORIFICE BUTTON
HEX HD CAPSCREW
LOCKWASHER
PRIMING VALVE GASKET
PRIMING CHAMBER
STRAINER ASSY
INDICATES PARTS RECOMMENDED FOR STOCK
PAGE E - 8
PART
NUMBER
26664-007
26688-021
B0806 15991
J08 15991
38683-657 19060
38343-020 10000
46641-222 17000
MAINTENANCE & REPAIR
QTY
8
8
1
1
1
1
1
PA SERIES OM-06575
ILLUSTRATION
WEAR RING
IMPELLER
NOTE: UNLESS OTHERWISE SPECIFIED,
MACHINED SURFACES TO BE 125 RMS.
Figure 5. Impeller Assembly Machining Tolerances
MAINTENANCE & REPAIR PAGE E - 9
OM-06575
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all SAFETY information in Section A.
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 wearing parts, follow these instructions which are keyed to the illustrations (see Figures 1 through 5) and the accompanying parts lists.
PA SERIES
1. Familiarize yourself with this man ual.
2. Disconnect or lock out the power source to ensure that the pump will remain inoperative.
3. Allow the pump to completely cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cau tiously.
7. Drain the pump.
This manual will alert personnel to known procedures which require spe cial attention, to those which could damage equipment, and to those which could be dangerous to personnel.
How ever, this manual cannot possibly antici pate and provide detailed instructions and precautions for every situation that might occur during maintenance of the unit. Therefore, it is the responsibility of the owner/maintenance personnel to ensure that only safe, established main tenance procedures are used, and that any procedures not addressed in this manual are performed only after estab lishing that neither personal safety nor pump integrity are compromised by such practices.
Before attempting to service the pump, disconnect or lock out the power source to ensure that the pump will remain inoperative. Close all valves in the suction and discharge lines.
For power source disassembly and repair, consult the literature supplied with the power source, or contact your local power source representative.
Before attempting to open or service the pump:
PAGE E - 10
This pump may be used to handle mate rials which could cause illness through direct exposure or emitted fumes. Wear adequate protective clothing when working on the pump or piping.
Death or serious personal injury and damage to the pump or components can occur if proper lifting procedures are not observed. Make certain that hoists, chains, slings or cables are in good working condition and of suffi cient capacity and that they are posi tioned so that loads will be balanced and the pump or components will not be damaged when lifting. Suction and dis charge hoses and piping must be re moved from the pump before lifting. Lift the pump or component only as high as necessary and keep personnel away from suspended objects.
Priming Chamber Removal And Disassembly
(Figure 1)
Disconnect both the suction piping and the air dis charge tubing from the priming chamber assembly
(2). Support the priming chamber assembly using
MAINTENANCE & REPAIR
PA SERIES OM-06575 a sling and a suitable lifting device. Remove the hardware (21 and 22) and separate the priming chamber assembly, baffle (18) and gasket (19) from the pump assembly.
(Figure 4)
Remove the hardware (2 and 3) securing the prim ing valve (1) to the priming chamber (5). Carefully lift the valve components from the priming cham ber. Remove the gasket (4) and clean the mating surfaces.
If the priming valve float is stuck or the strainer (6) is clogged, it can usually be cleaned without further disassembly.
The only serviceable part of the priming valve is the orifice button (not shown). If liquid continues to by pass through the priming chamber after adjusting the orifice button (see Priming Chamber Reas sembly and Installation for adjustment), the but ton may require replacement. To replace the orifice button, remove one of the “e‐clips” from the pivot pin closest to the orifice button and remove the piv ot pin. This will allow the linkage to be raised high enough to access the orifice button.
Remove the hex nut and lock washer securing the orifice button to the linkage bar and unscrew the orifice button from the linkage bar.
Suction Head And Wear Ring Removal
(Figure 2)
Unless replacement of the spool gasket (3, Figure
1) is required, the suction head (49) may be re moved without separating it from the spool. How ever, if the spool gasket must be replaced, support the spool with a suitable hoist and sling, remove the hardware (8 and 9, Figure 1) and separate the suction spool and gasket from the suction head.
Remove the hardware securing the suction head
(49) to the base. Support the suction head using a suitable hoist and sling. Disengage the hardware
(14 and 15) and separate the suction head and wear ring (51) from the pump casing. Remove the suction head gasket (52) and clean the mating sur faces.
Inspect the wear ring for excessive wear or scoring.
The wear ring is a press fit into the suction head and is additionally secured with the spiral pins (50).
If replacement is required, use a small bit to drill three holes horizontally, 180 apart, through the wear ring between each of the spiral pins. Use a chisel or other suitable tool to complete the cuts through the wear ring. Use caution not to damage the suction head bore. Remove the wear ring sec tions from the suction head. Pull the spiral pins from the suction head.
If no further disassembly is required, see Suction
Head and Wear Ring Installation .
Pump Casing Removal
(Figure 2)
Support the pump casing using a suitable hoist and sling.
Discharge Check Valve Removal and
Disassembly
(Figure 1)
Support the discharge check valve assembly (10) using a sling and a suitable lifting device. Remove the hardware (7, 8 and 9) and separate the dis charge check valve assembly and gasket (3) from the pump assembly (1).
The flapper and gasket are the only serviceable parts of the check valve. If the flapper requires re placement, remove the hardware securing the cover. Separate the valve cap and remove the flap per and gasket.
MAINTENANCE & REPAIR
NOTE
When removing the pump casing, use a wire to se cure the assembled bottle oiler (54, Figure 3) and bracket (12, Figure 3) above the level of the oil in the seal cavity. This will prevent oil from leaking out of the oiler during disassembly.
If the impeller (2) is to be removed, the impeller screw (7) should be loosened before removing the pump casing. Immobilize the impeller by inserting
PAGE E - 11
OM-06575 PA SERIES a wood block through the pump discharge and into the impeller vanes. Remove the impeller screw and washer (8). Remove the wood block from the pump discharge.
Remove the hardware (13, 14 and 15, Figure 3) se curing the pump casing and bottle oiler bracket to the pedestal (20, Figure 3).
Pull the pump casing straight away from the ped estal to prevent binding on the impeller. Remove the casing gasket (6) and clean the contacting sur faces.
Impeller Removal
(Figure 2)
Before removing the impeller, loosen the hose clamp (10, Figure 3) and remove the hose (48, Fig ure 3) from the lower connector (11, Figure 3). Re move the bottle oiler and bracket assembly and drain the seal cavity. This will prevent the oil in the oiler from escaping when the impeller is removed.
With the impeller screw and washer removed as described in Pump Casing Removal , insert a pair of wedges 180 apart between the impeller and the seal plate (40, Figure 3). Tap the wedges alternate ly to force the impeller off the shaft. Retain the im peller key (33, Figure 3).
Inspect the impeller wear ring for excessive wear or scoring.
Proper replacement of the impeller wear ring requires machining and dynamic bal ancing the impeller assembly after the new wear ring is welded to the impeller. Failure to properly install the new wear ring and machine and balance the impeller assem bly can result in premature shaft, seal or bearing failure, or other damage to the pump.
To replace the wear ring, grind off the three weld spots securing the wear ring to the impeller. Use caution not to damage the impeller. Pry or carefully grind the wear ring off the impeller.
PAGE E - 12
Seal Removal
(Figures 2 and 6)
This pump is designed with two seals; a primary mechanical seal (3) located directly behind the im peller and a secondary oil seal (23, Figure 3) lo cated in the seal plate cover (45, Figure 3). If the liq uid being pumped leaks past the oil seal, both seals should be replaced immediately.
Remove the impeller shims (42). Tie and tag the shims for ease of reassembly. Remove the seal spring. Slide the rotating portion of the seal (con sisting of the shaft sleeve and O‐ring, bellows and retainer, and rotating element) off the shaft as a unit.
Apply oil to the sleeve and work it up under the rub ber bellows. Slide the bellows and retainer off the sleeve. Remove the sleeve O‐ring.
Remove the hardware (16 and 17) and slide the seal plate and remaining seal components off the shaft. Disengage the hardware (46 and 47, Figure
3) and separate the seal plate cover and O‐ring
(37, Figure 3) from the seal plate.
Use a suitably sized dowel to press the stationary portion of the seal out of the seal plate. Press the oil seal out of the seal plate cover.
If no further disassembly is required, refer to Seal
Installation .
Pedestal Assembly Removal
(Figure 3)
Disassembly of the pedestal requires separation of the pump and driver.
Remove the hardware securing the pedestal to the base. Use a suitable hoist and sling to remove the pedestal assembly.
Shaft and Bearing Removal and Disassembly
(Figure 3)
When the pump is properly operated and main tained, the pedestal should not require disassem bly. Disassemble the shaft and bearings only when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
MAINTENANCE & REPAIR
PA SERIES OM-06575 is not recommended. These operations should be performed only in a properly equipped shop by qualified personnel.
Before disassembling the pedestal, remove the pedestal drain plug (21) and drain the oil from the pedestal. Clean and reinstall the pipe plug.
Disengage the capscrews (22) and and remove the outboard bearing cap (24), O‐ring (25) and oil seal (23). Remove the bearing shims (26). Press the oil seal from the bearing cap.
Straighten the tab on the washer (28) securing the bearing lock nut (27). Use a spanner wrench to re move the lock nut. Remove the tab washer.
Disengage the capscrews (22) and remove the in board bearing cap (35) and oil seal (23). Remove the bearing cap gasket (29) and clean the mating surfaces. Press the oil seal from the bearing cap.
Place a block of wood against the impeller end of the shaft (32) and tap the shaft and assembled bearings (30 and 34) out of the pedestal.
After removing the shaft and bearings, clean and inspect the bearings in place as described in
Bearing Cleaning And Inspection .
The bearing tolerances provide a tight press fit onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft, or pedestal if the proper bearing fit is not achieved.
If bearing replacement is required, remove the re taining ring (55) and use a bearing puller to remove the inboard and outboard bearings from the shaft.
Bearing Cleaning And Inspection
(Figure 3)
Clean the bearing housing, shaft and all compo nent parts (except the bearings) with a soft cloth soaked in cleaning solvent. Inspect the parts for wear or damage and replace as necessary.
Most cleaning solvents are toxic and
MAINTENANCE & REPAIR flammable. Use them only in a well ven tilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent contain ers.
Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil.
Bearings must be kept free of all dirt and foreign material. Failure to do so will great ly shorten bearing life. Do not spin dry bearings. This may scratch the balls or races and cause premature bearing fail ure.
Rotate the bearings by hand to check for rough ness or binding. Inspect the bearing balls (or roll ers) on open‐type bearings. If rotation is rough or the balls or rollers are discolored, replace the bear ings.
Shaft and Bearing Reassembly and Installation
(Figure 3)
Inspect the impeller shaft (32) for distortion, nicks or scratches, or damaged keyways. Dress small nicks and burrs with a fine file or emery cloth. Re place the shaft if defective.
To prevent damage during removal from the shaft, it is recommended that bearings be cleaned and inspected in place . It is strongly recommended that the bearings be 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, or hot plate may be used to heat the bearings. Bear ings should never be heated with a direct flame or directly on a hot plate.
PAGE E - 13
OM-06575 PA SERIES
Use caution when handling hot bearings to prevent burns.
When installing the bearings onto the shaft, never press or hit against the outer race, balls, or ball cage. Press only on the inner race.
PAGE E - 14
NOTE
If a hot oil bath is used to heat the bearings, both the oil and the container must be absolutely clean. If the oil has been previously used, it must be thor oughly
filtered.
Heat the bearings to a uniform temperature no higher than 250 F (120 C). Position the roller bearing (34) on the shaft with the internal snap ring positioned away from the impeller end of the shaft.
Slide the roller bearing onto the shaft until fully seated against the shaft shoulder. This should be done quickly, in one continuous motion, to prevent the bearings from cooling and sticking on the shaft.
After the bearing has been installed and allowed to cool, check to ensure that it has not moved away from the shaft shoulder in shrinking. If movement has occurred, use a suitably sized sleeve and a press to reposition the bearing against the shaft shoulder.
Secure the roller bearing on the shaft with the bear ing retaining ring (55).
Slide the heated outboard bearings (30) onto the shaft, one at a time, with the larger inner races of each bearing positioned away from each other as shown in Detail E, Figure 3.
If heating the bearings is not practical, use a suit ably sized sleeve and an arbor (or hydraulic) press to install the bearings on the shaft.
After the bearings have been installed and allowed to cool, check to ensure that they have not moved away from the shaft shoulders in shrinking. If movement has occurred, use a suitably sized sleeve and a press to reposition the bearings against the shaft shoulder.
Secure the assembled shaft and bearings by clamping on the surface between the bearings.
Use caution not to scratch or mar the part number etched into the shaft in this area. Install the tab washer (28) and bearing lock nut (27). Torque the lock nut to 150 ft. lbs. (1800 in. lbs. or 20,7 m. kg.).
Locate the tab on the lock washer that aligns with a slot in the lock nut, and bend the tab over into the slot.
Slide the shaft and assembled bearings into the pedestal from the drive end until the outer race on the inboard ball bearing (30) seats against the ped estal bore.
When installing the shaft and bearings into the bearing bore, push against the outer race. Never hit the balls or ball cage.
Press the oil seal (23) into the bearing cap (24) with the lip positioned as shown in Figure 3. Lubricate and install a new bearing cap O‐ring (25) and se cure the bearing cap with the capscrews (22). Use caution not to cut or roll the lip of the oil seal when installing the bearing cap.
Press the oil seal (23) into the bearing cap (35) with the lip positioned as shown in Figure 3. Replace the bearing cap gasket (29) and secure the bear ing cap with the capscrews (22). Use caution not to cut or roll the lip of the oil seal when installing the bearing cap.
Lubricate the pedestal as indicated in LUBRICA
TION .
Seal Reassembly and Installation
(Figures 2 and 6)
Clean the bore of the seal plate (40), the seal plate cover (45) and the shaft (32) with a cloth soaked in fresh cleaning solvent.
MAINTENANCE & REPAIR
PA SERIES OM-06575
Most cleaning solvents are toxic and flammable. Use them only in a well ven tilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent contain ers.
Lay the seal plate cover on a flat surface with the inner side facing up. Press the oil seal (23) into the seal plate cover with the lip positioned as shown in
Detail E, Figure 3.
Install a new O‐ring (37) in the groove in the seal plate and secure the seal plate cover to the seal plate with the hardware (46 and 47).
Since the mechanical seal is the primary seal in the pump, special consideration should be given to ensure proper installation.
The seal is not normally reused because wear pat terns on the finished faces cannot be realigned during reassembly. This could result in premature failure. If necessary to reuse an old seal in an emer gency, carefully wash all metallic parts in fresh cleaning solvent and allow to dry thoroughly.
Handle the seal parts with extreme care to prevent damage. Be careful not to contaminate precision finished faces; even fingerprints on the faces can shorten seal life. If necessary, clean the faces with a non‐oil based solvent and a clean, lint‐free tissue.
Wipe lightly in a concentric pattern to avoid scratching 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 it if 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 from the container and inspect the precision finished faces to ensure that they are free of any foreign matter.
To ease installation of the seal, lubricate the bel lows and stationary seat O‐rings with water or a very small amount of oil, and apply a drop of light lubricating oil on the finished faces. Assemble the seal as follows, (see Figure 6).
MAINTENANCE & REPAIR PAGE E - 15
OM-06575
IMPELLER
SHAFT
KEY
IMPELLER
SHAFT
SHAFT
SLEEVE
RETAINER SPRING
SLEEVE
O‐RING
ROTATING
ELEMENT
BELLOWS
IMPELLER
SHIMS
Figure 6. Seal Assembly
PA SERIES
SEAL PLATE
STATIONARY
ELEMENT
O‐RINGS
STATIONARY
SEAT
PAGE E - 16 MAINTENANCE & REPAIR
PA SERIES OM-06575
The standard seal is not designed for oper ation at temperatures above 160 F (71 C).
Do not use at higher operating tempera tures.
Lubricate the outboard stationary seat O‐ring with water or light oil. Position the seal plate with the im peller side up and press the stationary subas sembly (consisting of the stationary seat, O‐rings and stationary element) into the front of the seal plate until it seats squarely against the bore shoul der.
Slide the seal plate and stationary portion of the seal over the shaft until it is seated against the ped estal (20). Be careful not to damage the stationary element or roll or cut the lip of the oil seal (23) on the shaft keyway. Secure the seal plate to the pedestal with the previously removed hardware (16 and 17).
Lubricate the seal sleeve O‐ring with a small amount of light oil and install it in the groove in the
I.D. of the sleeve.
Lubricate the seal sleeve with a small amount of light oil and slide the rotating subassembly (con sisting of rotating element, bellows and retainer), onto the sleeve until the rotating element is just flush with the turned end of the sleeve.
Slide the sleeve and subassembled seal onto the shaft until the seal faces contact and the sleeve seats against the shaft shoulder.
Install the seal spring. Lubricate the seal as indi cated in LUBRICATION after the impeller, remain ing pump components, bottle oiler and piping are installed.
Impeller Installation
(Figure 2)
Proper wear ring replacement requires machining and dynamic balancing the im peller assembly after the wear ring is
MAINTENANCE & REPAIR welded to the impeller. Failure to properly install the wear ring and machine and bal ance the impeller assembly can result in premature shaft, seal or bearing failure, or other damage to the pump.
Inspect the impeller, and replace it if cracked or badly worn. If the impeller wear ring was removed, chill the impeller by refrigeration and use an induc tion heater or oven to heat the new wear ring. Slide the wear ring onto the impeller until fully seated against the shoulder and allow it to cool.
The wear ring must seat squarely on the impeller; otherwise binding and/or exces sive wear will occur. Use caution when han dling hot parts to prevent burns.
Spot weld the wear ring to the impeller at three places, equally spaced at the vanes. After welding, machine the wear ring as shown in Figure 5.
The impeller assembly must be machined and balanced as shown in Figure 5. Other wise, premature shaft, seal or bearing fail ure, or other damage to the pump may oc cur.
After machining, dynamically balance the impeller assembly per plane 1.05 oz./in. (11.7 g/cm).
Install the same thickness of impeller adjusting shims (42) as previously removed. Install the shaft key (33, Figure 3) and press the impeller assembly onto the shaft until fully seated.
A clearance of approximately .015 inch (0,38 mm) between the impeller and the seal plate is recom mended for maximum pump efficiency. Measure this clearance, and add or remove impeller adjust ing shims as required.
After the impeller clearance has been set, align the pin (9) in the impeller washer (8) with the hole in the impeller and install the washer. Apply “Never‐
Seez” or equivalent compound on the threads of
PAGE E - 17
OM-06575 PA SERIES the impeller capscrew (7). Immobilize the shaft and secure the the impeller by torquing the capscrew to 225 ft. lbs. (2700 in. lbs. or 31 m. kg.).
Pump Casing Installation
(Figure 2)
Install the casing gasket (6) over the pump casing studs (4 and 5). Remove the hardware temporarily securing the seal plate to the pedestal. Use a suit able hoist and sling to position the volute over the impeller and slide the studs through the seal plate and pedestal mounting holes.
(Figure 3)
Install the bottle oiler bracket (12) over the volute studs. Secure the bracket and pump casing with the hardware (13, 14,and 15). Reconnect the hose
(48) to the connector (11) in the seal plate and se cure it with the hose clamp (10).
Suction Head And Wear Ring Installation
(Figure 2)
If the wear ring (51) was removed, chill the wear ring by refrigeration and heat the suction head.
Slide the wear ring into the suction head until fully seated and allow it to cool.
The wear ring must seat squarely in the suction head; otherwise binding and/or ex cessive wear will occur. Use caution when handling hot parts to prevent burns.
The wear ring is secured to the suction head with the spiral pins (50). Drill three evenly spaced
3/16‐inch diameter x 3/4‐inch deep holes through the wear ring and into the suction head. Tap the spiral pins into the holes until fully seated.
Install the suction head gasket (52). Position the suction head over the studs (53) and secure it with the hardware (14 and 15).
Turn the impeller shaft by hand and check for any scraping or binding and correct it before putting the pump into service.
PAGE E - 18
Discharge Check Valve Assembly and
Installation
(Figure 1)
The flapper and gasket are the only serviceable parts of the check valve. If the flapper requires re placement, remove the hardware securing the cover and gasket. Separate the valve cap and re place the flapper.
Install the valve cap gasket and secure the cap with the previously removed hardware.
Support the discharge check valve assembly (5) using a sling and a suitable lifting device. Secure the discharge check valve assembly and gasket
(6) to the pump assembly (1) using the hardware
(2, 3 and 4).
Priming Chamber Assembly And Installation
(Figure 4)
Clean and inspect the components of the priming valve (1). Inspect the linkage and ensure the orifice button (not shown) squarely engages the valve seat. Replace the orifice button if required (see
Priming Chamber Removal and Disassembly for orifice button removal).
If the orifice button was removed, screw the new orifice button into the linkage bar until fully seated.
Align the hole in the linkage bar with the holes in the bracket and reinstall the pivot pin. Secure the pivot pin with the previously removed “e‐clip”.
Adjust the orifice button seating as necessary by screwing the orifice button into or out of the linkage bar. Proper adjustment is achieved when the ori fice button fully seats against the orifice before the linkage bar on the float bottoms against the threads on the orifice button. When adjustment is complete, install and tighten the lock washer and hex nut securing the orifice button.
Install the strainer (6) and priming valve gasket (4).
Lower the float into the priming chamber (5) and secure the priming valve with the previously re moved hardware (2 and 3).
(Figure 1)
Install the baffle (18) and gasket (19) and use a sling and suitable lifting device to position the prim
MAINTENANCE & REPAIR
PA SERIES OM-06575 ing chamber assembly on the hopper spool (13).
Secure the priming chamber assembly with the hardware (21 and 22).
Reconnect the suction piping to the hopper spool and the air discharge tubing to the priming cham ber assembly.
LUBRICATION
Seal Assembly
(Figure 3)
Fill the bottle oiler (54) and seal cavity with approxi mately 85 ounces (2,5 liter) SAE No. 30 non‐deter gent oil. Check the oil level regularly and refill as re quired.
Bearings
(Figure 3)
The pedestal was fully lubricated when shipped from the factory. Check the oil level regularly through the sight gauges (18) and maintain it at the midpoint of the gauges. When lubrication is re quired, remove the vented plug (19) and add SAE
No. 30 non‐detergent oil through the opening.
Clean and reinstall the vented plug. Do not over‐lu bricate. Over‐lubrication can cause the bearings to over‐heat, resulting in premature bearing failure.
Under normal conditions, drain the bearing hous ing once each year and refill with approximately 14 ounces (0,4 liter) of clean oil. Change the oil more frequently if the pump is operated continuously or installed in an environment with rapid temperature 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 and cold temperatures are common.
For cold weather operation, consult the factory or a lubricant supplier for the recommended grade of oil.
MAINTENANCE & REPAIR PAGE E - 19
For Warranty Information, Please Visit www.grpumps.com/warranty or call:
U.S.: 419-755-1280
Canada: 519-631-2870
International: +1-419-755-1352
GORMAN‐RUPP PUMPS
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