Gorman-Rupp Pumps T2A71-B /FM 1248099 and up User Manual 38 Pages
advertisement
OM-05348-01
August 14, 2002
Rev. G 05‐12‐22
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
T SERIES PUMPS
MODELS
T2A71‐B
INCLUDING: /F, and /FM
GORMAN‐RUPP PUMPS
www.grpumps.com
2002 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE B - 1
Pump Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PREINSTALLATION INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POSITIONING PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUTOMATIC AIR RELEASE VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Release Valve Installation
ALIGNMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coupled Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V‐Belt Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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OPERATION - SECTION C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE C - 1
PRIMING
STARTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Rotation
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lines With a Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lines Without a Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Temperature And Overheating
Strainer Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Vacuum Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold Weather Preservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BEARING TEMPERATURE CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE C - 1
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TABLE OF CONTENTS
(continued)
TROUBLESHOOTING - SECTION D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE D - 1
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE D - 3
PUMP MAINTENANCE AND REPAIR - SECTION E . . . . . . . . . . . . . . . .
PAGE E - 1
PERFORMANCE CURVE
PARTS LISTS:
Pump Model
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Rotating Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
Back Cover And Wear Plate Removal
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Check Valve Removal
Rotating Assembly Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Removal and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Reassembly and Installation
Seal Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotating Assembly Installation
Suction Check Valve Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Cover Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRESSURE RELIEF VALVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Final Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PAGE E - 15 ii
T SERIES OM-05348
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.
HAZARD AND INSTRUCTION
DEFINITIONS
The following are used to alert maintenance per sonnel to procedures which require special atten tion, to those which could damage equipment, and to those which could be dangerous to personnel:
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.
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.
If there are any questions regarding the pump or its application which are not covered in this man ual or in other literature accompanying this unit, please contact your Gorman‐Rupp distributor, or
The Gorman‐Rupp Company:
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.
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
Hazards or unsafe practices which COULD result in minor personal injury or product or property damage. These instructions describe the requirements and the possi ble 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
T SERIES OM-05348
SAFETY - SECTION A
This information applies to T Series r
ba sic pumps. Gorman‐Rupp has no con trol over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before attempting to begin op eration.
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 pro vide detailed instructions and precau tions for each specific application or for every situation that might occur during maintenance of the unit. Therefore, it is the responsibility of the owner, installer and/or maintenance personnel to en sure that applications and/or mainte nance procedures not addressed in this manual are performed only after estab lishing that neither personal safety nor pump integrity are compromised by such applications or procedures.
This pump is designed to handle liquids containing large entrained solids or slurries. Do not attempt to pump vola tile, corrosive, or flammable materials which may damage the pump or endan ger personnel as a result of pump fail ure.
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 the guards in place over the rotating parts.
Exposed rotating parts can catch cloth ing, fingers, or tools, causing severe in jury to personnel.
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.
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 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
SAFETY PAGE A - 1
OM-05348 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.
Death or serious personal injury and damage to the pump or components can occur if proper lifting procedures are not observed. Make certain that
T SERIES 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 A - 2 SAFETY
T SERIES OM-05348
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 stat ic 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.
Pump Dimensions
See Figure 1 for the approximate physical dimen sions of this pump.
OUTLINE DRAWING
NOTE: OPTIONAL SUCTION & DISCHARGE SPOOL FLANGES AVAILABLE
Figure 1. Pump Model T2A71-B, Including /F, /FM
PREINSTALLATION INSPECTION a. Inspect the pump for cracks, dents, damaged threads, and other obvious damage.
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: b. Check for and tighten loose attaching hard ware. Since gaskets tend to shrink after dry
INSTALLATION PAGE B - 1
OM-05348 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 body and on the accompanying decal. Refer to
ROTATION in OPERATION , Section C.
d. Check levels and lubricate as necessary. Re fer to LUBRICATION in the MAINTENANCE
AND REPAIR section of this manual and per form duties as instructed.
e. If the pump and power source have been stored for more than 12 months, some of the components or lubricants may have ex ceeded their maximum shelf life. These must be inspected or replaced to ensure maxi mum 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
T SERIES 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.
Lifting
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.
Clearance
It is recommended that 18 inches (457 mm) of clearance be provided in front of the back cover to permit removal of the cover and easy access to the pump interior. A minimum clearance of 8 inches
(203 mm) must be maintained to permit removal of the cover.
SUCTION AND DISCHARGE 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
PAGE B - 2
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
INSTALLATION
T SERIES 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.
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.
INSTALLATION
OM-05348
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.
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 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
Most pumps are drilled and tapped for installing discharge pressure and vacuum suction gauges.
If these gauges are desired for pumps that are not tapped, drill and tap the suction and discharge lines not less than 18 inches (457,2 mm) from the suction and discharge ports and install the lines.
Installation closer to the pump may result in erratic readings.
Strainers
If a strainer is furnished with the pump, be certain to use it; any spherical solids which pass through a strainer furnished with the pump will also pass through the pump itself.
If a strainer is not furnished with the pump, but is installed by the pump user, make certain that the total area 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 1 1/2‐inch
(38,1 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.
PAGE B - 3
OM-05348
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.
T SERIES
Suction Line Positioning
The depth of submergence of the suction line is critical to efficient pump operation.
Figure 2 shows recommended minimum submergence vs. veloc ity.
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).
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES Valves
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.
PAGE B - 4
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 and a system check valve be in stalled in the discharge line to protect the pump from excessive shock pressure and reverse rota tion when it is stopped.
INSTALLATION
T SERIES OM-05348
If the application involves a high discharge head, gradually close the discharge throt tling valve before stopping the pump.
Bypass Lines
Self‐priming pumps are not air compressors. Dur ing the priming cycle, air from the suction line must be vented to atmosphere on the discharge side. If the discharge line is open, this air will be vented through the discharge. However, if a check valve has been installed in the discharge line, the dis charge side of the pump must be opened to atmos pheric pressure through a bypass line installed be tween the pump discharge and the check valve. A self‐priming centrifugal pump will not prime if there is sufficient static liquid head to hold the dis charge check valve closed.
NOTE
The bypass line should be sized so that it does not affect pump discharge capacity; however, the by pass line should be at least 1 inch in diameter to minimize the chance of plugging.
In high discharge head applications (more than
30 feet), an excessive amount of liquid may be by passed and forced back to the wet well under the full working pressure of the pump; this will reduce overall 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 are reliable, and require minimum maintenance. See
AUTOMATIC AIR RELEASE VALVE in this section for installation and theory of operation of the Auto matic Air Release Valve. Consult your Gorman‐
Rupp distributor, or contact the Gorman‐Rupp
Company for selection of an Automatic Air Release
Valve to fit your application.
If the installation involves a flooded suction such as a below‐ground lift station. A pipe union and manu al shut‐off valve may be installed in the bleed line to allow service of the valve without shutting down the station, and to eliminate the possibility of flooding.
If a manual shut‐off valve is installed anywhere in the air release piping, it must be a full‐opening ball type valve to prevent plugging by solids.
In low discharge head applications (less than 30 feet or 9 meters), it is recommended that the by pass line be run back to the wet well, and located 6 inches below the water level or cut‐off point of the low level pump. In some installations, this bypass line may be terminated with a six‐to‐eight foot length of 1 1/4 inch I.D. smooth‐bore hose; air and liquid vented during the priming process will then agitate the hose and break up any solids, grease, or other substances likely to cause clogging.
A bypass line that is returned to a wet well must be secured against being drawn into the pump suction inlet.
It is also recommended that pipe unions be in stalled at each 90 elbow in a bypass line to ease disassembly and maintenance.
INSTALLATION
If a manual shut‐off valve is installed in a bypass line, it must not be left closed during operation. A closed manual shut‐ off valve may cause a pump which has lost prime to continue to operate with out reaching prime, causing dangerous overheating and possible explosive rupture of the pump casing. Personnel could 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 pump can reach boiling temperatures, and va por pressure within the pump can cause parts being disengaged to be ejected with great force. After the pump cools, drain the liquid from the pump by re moving the casing drain plug. Use cau
PAGE B - 5
OM-05348 tion when removing the plug to prevent injury to personnel from hot liquid.
AUTOMATIC AIR RELEASE VALVE
When properly installed, a Gorman‐Rupp Auto matic Air Release Valve will permit air to escape through the bypass line and then close automati cally when the pump is fully primed and pumping at full capacity.
Some leakage (1 to 5 gallons [3.8 to 19
T SERIES liters] per minute) will occur when the valve is fully closed. Be sure the bypass line is directed back to the wet well or tank to prevent hazardous spills.
Consult the manual accompanying the Air Release
Valve for additional information on valve installation and performance.
Air Release Valve Installation
The Automatic Air Release Valve must be inde pendently mounted in a horizontal position be tween the pump discharge port and the inlet side of the discharge check valve (see Figure 3). The inlet opening in the Air Release Valve is equipped with standard 1‐inch NPT pipe threads.
DISCHARGE PIPE
90 LONG
RADIUS
ELBOW
CLEAN‐OUT
COVER
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
SUPPORT
BRACKET
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF‐PRIMING
CENTRIFUGAL
PUMP
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) DO NOT EX
TEND BELOW PUMP
OFF LIQUID LEVEL
SUCTION
LINE
WET WELL
OR SUMP
Figure 3. Typical Automatic Air Release Valve Installation
Connect the valve outlet to a bleed line which slopes back to the wet well or sump. The bleed line must be the same size as the outlet opening or larger, depending on which Air Release Valve is be ing used. If piping is used for the bleed line, avoid the use of elbows whenever possible.
NOTE
For multiple pump installations, it is recommended that each Air Release Valve be fitted with an inde pendent bleeder line directed back to the wet well.
If multiple Air Release Valves are installed in a sys tem, do not direct bleeder lines to a common mani fold pipe. Contact your Gorman‐Rupp distributor or the Gorman‐Rupp Company for information about installation of an Automatic Air Release Valve for your specific application.
PAGE B - 6 INSTALLATION
T SERIES
ALIGNMENT
The alignment of the pump and its power source is critical for trouble‐free mechanical operation. In ei ther 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 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-05348
The coupling is in alignment when the hub ends are the same distance apart at all points (see Fig ure 4A).
Figure 4A. Aligning Spider‐Type Couplings
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 .
INSTALLATION
Figure 4B. 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 4B).
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.
V‐Belt Drives
When using V‐belt drives, the power source and the pump must be parallel. Use a straightedge along the sides of the pulleys to ensure that the pul leys are properly aligned (see Figure 4C). In drive systems using two or more belts, make certain that the belts are a matched set; unmatched sets will cause accelerated belt wear.
PAGE B - 7
OM-05348 T SERIES
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure 4C. 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 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.
PAGE B - 8 INSTALLATION
T‐SERIES OM-05348
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and de cals attached to the pump.
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 casing has been filled, the pump will prime and reprime as necessary.
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.
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 ).
This pump is self‐priming, but the pump should never be operated unless there is liquid in the pump casing.
Never operate this pump unless there is liquid in the pump casing. The pump will not prime when dry. extended operation of a dry pump will destroy the seal assembly.
Add liquid to the pump casing when:
1. The pump is being put into service for the first time.
OPERATION
After filling the pump casing, reinstall and tighten the fill plug. Do not attempt to 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 cover or fill plug in the top of the casing, and add clean liquid until the casing is filled. Replace the fill cover or fill plug before operating the pump.
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.
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
PAGE C - 1
OM-05348 incorrect on a single‐phase motor, consult the liter ature supplied with the motor for specific instruc tions.
OPERATION
T‐SERIES
Leakage
No leakage should be visible at pump mating sur faces, or at pump connections or fittings. Keep all line connections and fittings tight to maintain maxi mum pump efficiency.
Lines With a Bypass
If a Gorman‐Rupp Automatic Air Release Valve has been installed, the valve will automatically open to allow the pump to prime, and automatically close after priming is complete (see INSTALLATION for
Air Release Valve operation).
If the bypass line is open, air from the suction line will be discharged through the bypass line back to the wet well during the priming cycle. Liquid will then continue to circulate through the bypass line while the pump is in operation.
Lines Without a Bypass
Open all valves in the discharge line and start the power source. Priming is indicated by a positive reading on the discharge pressure gauge or by a quieter operation. The pump may not prime imme diately because the suction line must first fill with liquid. 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 the discharge line throttling valve in order to fill the line slowly and guard against excessive shock pres sure which could damage pipe ends, gaskets, sprinkler heads, and any other fixtures connected to the line. When the discharge line is completely filled, adjust the throttling valve to the required flow rate.
Do not operate the pump against a closed discharge throttling valve for long periods of time. If operated against a closed discharge throttling valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
PAGE C - 2
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 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 pump can reach boiling temperatures, and va por pressure within the pump can cause parts being disengaged to be ejected with 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 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 overheating does occur, stop the pump immediately and allow it to cool before servicing it.
Approach any over heated pump cautiously . It is recommended 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 speci fied or provided by the Gorman‐Rupp Company.
OPERATION
T‐SERIES
Strainer Check
OM-05348
If a suction strainer has been shipped with the pump or installed by the user, check the strainer regularly, and clean it as necessary. The strainer should also be checked if pump flow rate begins to drop. If a vacuum suction gauge has been in stalled, monitor and record the 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.
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge in 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 does not, check for air leaks in the seal, gasket, or dis charge valve.
Open the suction line, and read the vacuum gauge with the pump primed and at operation speed.
Shut off the pump. The vacuum gauge reading will immediately drop proportionate to static suction lift, and should then stabilize. 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 installation of the vacuum gauge.
If the application involves a high discharge head, gradually close the discharge throt tling 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.
Do not operate the pump against a closed discharge throttling valve for long periods of time. If operated against a closed discharge throttling valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
Cold Weather Preservation
In below freezing conditions, drain the pump to prevent damage from freezing. 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 rotat ing parts. If the pump will be idle for more than a few 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 prevent large solids from clogging the drain port and pre venting the pump from completely 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 flushing with a hose.
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.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle briefly be fore stopping.
OPERATION
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
PAGE C - 3
OM-05348 curately by placing a contact‐type thermometer against the housing. Record this temperature for future reference.
A sudden increase in bearing temperature 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 MAINTENANCE
T‐SERIES
AND REPAIR ). Bearing overheating can also be caused by shaft misalignment and/or excessive vi bration.
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.
PAGE C - 4 OPERATION
T SERIES
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
OM-05348
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 before open ing 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
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
POSSIBLE CAUSE PROBABLE REMEDY
Not enough liquid in casing.
Add liquid to casing. See PRIM
ING .
Clean or replace check valve.
Suction check valve contaminated or damaged.
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.
Suction lift or discharge head too high.
Check piping installation and in stall bypass line if needed. See
INSTALLATION .
Strainer clogged.
Air leak in suction line.
Check strainer and clean if neces sary.
Correct leak.
Lining of suction hose collapsed.
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-05348 T SERIES
TROUBLE
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
POSSIBLE CAUSE
Strainer clogged.
Suction intake not submerged at proper level or sump too small.
Impeller or other wearing parts worn or damaged.
Impeller clogged.
Pump speed too slow.
Discharge head too high.
Suction lift too high.
PUMP REQUIRES
TOO MUCH POW
ER
Pump speed too high.
PUMP CLOGS
FREQUENTLY
EXCESSIVE NOISE
PAGE D - 2
Discharge head too low.
Liquid solution too thick.
Bearing(s) frozen.
Liquid solution too thick.
Discharge flow too slow.
Suction check valve or foot valve clogged or binding.
Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
PROBABLE REMEDY
Check strainer and clean if neces sary.
Check installation and correct sub mergence as needed.
Replace worn or damaged parts.
Check that impeller is properly centered and rotates freely.
Free impeller of debris.
Check driver output; check belts or couplings for slippage.
Install bypass line.
Measure lift w/vacuum gauge. Re duce lift and/or friction losses in suction line.
Check driver output; check that sheaves or couplings are cor rectly sized.
Adjust discharge valve.
Dilute if possible.
Disassemble pump and check bearing(s).
Dilute if possible.
Open discharge valve fully to in crease flow rate, and run power source at maximum governed speed.
Clean valve.
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 dam aged parts.
TROUBLESHOOTING
T SERIES OM-05348
TROUBLE
BEARINGS RUN
TOO HOT
POSSIBLE CAUSE
Bearing temperature is high, but within limits.
Low or incorrect lubricant.
Suction and discharge lines not properly supported.
Drive misaligned.
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.
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-05348 T 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
T SERIES OM-05348
PUMP MAINTENANCE AND REPAIR - SECTION E
MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK
OPERATING PERFORMANCE.
STANDARD PERFORMANCE FOR PUMP MODEL T2A71-B, Including /F, /FM
Based on 70 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-05348
PARTS PAGE
ILLUSTRATION
T SERIES
PAGE E - 2
Figure 1. Pump Model T2A71-B, Including /F, /FM
MAINTENANCE & REPAIR
T SERIES OM-05348
PARTS LIST
Pump Model T2A71-B, Including /F, /FM
(From S/N 1248099 Up)
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 part numbers.
ITEM
NO.
PART NAME PART
NUMBER
QTY ITEM
NO.
PART NAME PART
NUMBER
QTY
1 PUMP CASING
2 SUCTION FLG GSKT
SEE NOTE BELOW
38683-273 19370
3 SUCTION FLANGE:
-T2A71-B
-T2A71-B /F
-T2A71-B /FM
4 LOCK WASHER
38641-039 10000
38642-009 10000
38642-006 10000
J10 15991
5 HEX HEAD CAP SCREW B1006 15991
6 PIPE PLUG P04 15079
6A PIPE PLUG P04 15079
7 FLANGE GASKET
8 DISCHARGE FLANGE:
-T2A71-B
-T2A71-B /F
-T2A71-B /FM
9 FILL PLUG ASSY
25113-031
1688A 10010
38642-008 10000
38642-007 10000
1
1
1
1
48271-068 1
10 CASING DRAIN PLUG P12 15079 1
11 REPAIR ROTATING ASSY 44163-325 1
12 BACK COVER PLATE ASSY42111-807 1
-WARNING PLATE
-DRIVE SCREW
2613EV 13990
BM#04-03 17000
-WARNING DECAL 38816-302
-PRESS RELIEF VALVE 26662-005
1
1
1
4
13 O‐RING 25152-363 2
1
8
1
1
8
1
2
1
1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR
PUMP CASING ASSY
46472-719 1
14 WEAR PLATE ASSY
15 STUD
16 BACK COVER NUT
17 LOCK WASHER
46451-370 24160
C0808 15991
31871-075 15000
J06 15991
18 HEX HEAD CAP SCREW B0604 15991
19 PIPE PLUG P08 15079
20 FLAP VALVE COVER
21 LOCK WASHER
38346-617 17070
J04 15991
22 HEX HEAD CAP SCREW B0402-1/2 15991
23 LOCK WASHER
24 HEX NUT
J05 15991
D05 15991
25 FLAP VALVE 46411-132 24010
26 ROT ASSY ADJ SHIM SET 48261-058
25152-259 1 27 O‐RING
NOT SHOWN:
DISCHARGE STICKER
PRIMING STICKER
SUCTION STICKER
WARNING DECAL
ROTATION DECAL
NAME PLATE
DRIVE SCREW
LUBE DECAL
G‐R DECAL
6588BJ
6588AH
6588AG
2613FE 1
2613M 1
38818-040 13990
BM#04-03 17000
11421
GR-03
1
1
1
1
1
1
4
1
4
2
2
2
1
2
2
4
1
2
4
2
MAINTENANCE & REPAIR PAGE E - 3
OM-05348
ILLUSTRATION
T SERIES
PAGE E - 4
Figure 2. Repair Rotating Assembly
MAINTENANCE & REPAIR
T SERIES OM-05348
PARTS LIST
Repair Rotating Assembly
PART
NUMBER
QTY ITEM
NO.
PART NAME ITEM
NO.
PART NAME PART
NUMBER
QTY
10
10A
11
12
13
14
15
15A
6
7
8
9
4
5
16
16A
1
2
3
IMPELLER
IMP ADJ SHIM SET
MECH SEAL ASSY
38615-093 1102H 1
2X 17090 1
46512-159 1
SHAFT SLEEVE
SEAL PLATE
31441-037 16000 1
38272-119 1102H 1
GASKET
BRG HOUSING
LOCK WASHER
HEX HD CAP SCREW
38687-556 20000 1
38251-208 10000 1
J05 15991
B0505 15991
8
4
BRG CVTY SIGHT GAUGE 26714-011
SEAL CVTY SIGHT GAUGE 26714-011
VENTED PIPE PLUG
AIR VENT
PIPE BUSHING
4823 15079
S1530
AP0402 15079
PIPE PLUG P06 15079
BRG CVTY DRAIN PLUG P04 15079
SEAL CVTY DRAIN PLUG P04 15079
2
1
1
1
1
1
1
1
OIL SEAL
OIL SEAL
25258-344 1
25258-344 1
INDICATES PARTS RECOMMENDED FOR STOCK
17
18
19
20
21
22
23
24
25
26
BALL BEARING
IMPELLER SHAFT
KEY
BALL BEARING
RETAINING RING
BRG CAP GASKET
BEARING CAP
HEX HD CAP SCREW
SOC HD CAP SCREW
IMPELLER WASHER
23276-008 1
38514-565 16040
N0408 15990
1
1
23422-408 1
S248 1
38683-268 18000 1
38322-221 10000 1
B0503-1/2 15991
DM0503 15991
31167-025 15000 1
27
28
SHAFT SLEEVE O‐RING
SEAL PLATE O‐RING
25154-020 1
25152-259 1
29
30
31
BRG HOUSING O‐RING
SHIPPING PLUG
ROT ASSY ADJ SHIM SET
NOT SHOWN:
25152-363 1
11495 15079 2
48261-058 4
ROTATION DECAL
INSTRUCTION TAG
2613M 1
6588U 1
4
1
IF YOUR PUMP WAS NOT EQUIPPED FROM THE FACTORY WITH A SHAFT SLEEVE O‐RING, ORDER AN O‐RING (ITEM 27)
WHEN REPLACING THE SHAFT SLEEVE.
MAINTENANCE & REPAIR PAGE E - 5
OM-05348
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
T SERIES
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and decals 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 and 2) and the ac companying parts lists.
This manual will alert personnel to known proce dures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel. However, this manual cannot possibly anticipate and provide detailed precautions for every situation that might occur during maintenance of the unit. Therefore, it is the responsibility of the owner/maintenance per sonnel to ensure that only safe, established main tenance procedures are used, and that any proce dures not addressed in this manual are performed only after establishing that neither personal safety nor pump integrity are compromised by such prac tices.
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.
Many service functions may be performed by draining the pump and removing the back cover assembly. If major repair is required, the piping and/or power source must be disconnected. The following instructions assume complete disassem bly is required.
Before attempting to service the pump, disconnect or lock out the power source and take precautions to ensure that it 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.
PAGE E - 6
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.
Back Cover and Wear Plate Removal
(Figure 1)
The wear plate (14) is easily accessible and may be serviced by removing the back cover plate assem bly (12). Before attempting to service the pump, re move the pump casing drain plug (10) and drain the pump. Clean and reinstall the drain plug.
Remove the back cover nuts (16). Install two 3/8‐16
UNC x 2‐1/2 inch long capscrews (not supplied) in
MAINTENANCE & REPAIR
T SERIES the tapped holes in the cover plate. Use these jack ing screws to remove the back cover and as sembled wear plate from the pump casing (1). In spect the wear plate and replace it if badly scored or worn. To remove the wear plate, disengage the hardware (23 and 24).
Remove the two jacking screws from the back cov er. Inspect the back cover O‐ring (13) and replace it if damaged or worn.
OM-05348
With the impeller rotation still blocked, see Figure 3 and use a long piece of heavy bar stock to pry against the arm of the lathe dog in a counterclock wise direction (when facing the drive end of the shaft). Use caution not to damage the shaft or key way. When the impeller breaks loose, remove the lathe dog, key and wood block.
NOTE
Do not remove the impeller until the rotating assem bly has been removed from the pump casing.
Suction Check Valve Removal
(Figure 1)
If the check valve assembly (25) is to be serviced, remove the hardware (21 and 22) and remove the check valve cover (20). Pull the complete check valve assembly from the pump casing (1).
NOTE
Further disassembly of the check valve is not re quired since it must be replaced as a complete unit.
Individual parts are not sold separately.
Turn
Counterclockwise
Lathe Dog Arm
Rotating Assembly Removal
(Figure 2)
The rotating assembly may be serviced without disconnecting the suction or discharge piping; however, the power source must be removed to provide clearance.
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 (15A) and drain the seal lubricant.
This will prevent the oil in the seal cavity from es caping when the impeller is loosened. Clean and reinstall the seal cavity drain plug.
Immobilize the impeller by wedging a block wood between the vanes and the pump casing and re move the impeller capscrew and washer (25 and
26).
Install the shaft key (19). Install a lathe dog on the drive end of the shaft (18) with the “V” notch posi tioned over the shaft key.
MAINTENANCE & REPAIR
Heavy
Bar Stock
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Figure 3. Loosening Impeller
(Figure 1)
Remove the hardware (17 and 18) securing the ro tating assembly to the pump casing. Install two
3/8‐16 UNC x 2‐1/2 inch long capscrews (not sup plied) in the tapped holes in the bearing housing.
Use these jacking screws to remove the rotating assembly from the pump casing. Tie and tag the rotating assembly shims (26) or measure and re cord their thickness for ease of reassembly.
Remove the two jacking screws from the bearing housing. Remove the bearing housing O‐ring (27).
Impeller Removal
(Figure 2)
With the rotating assembly removed from the pump casing, unscrew the impeller from the shaft.
Use caution when unscrewing the impeller; ten
PAGE E - 7
OM-05348 sion on the shaft seal spring will be released as the impeller is removed. Inspect the impeller and re place it if cracked or badly worn.
Remove the impeller adjusting shims (2); tie and tag the shims, or measure and record their thick ness for ease of reassembly.
Seal Removal
(Figure 2)
Remove the seal spring.
Slide the shaft sleeve and rotating portion of the seal off the shaft as a unit. Apply oil to the sleeve and work it up under the bellows. Slide the rotating portion of the seal off the sleeve.
Use a pair of stiff wires with hooked ends to remove the stationary element and seat.
An alternate method of removing the stationary seal components is to remove the hardware (28 and 29) and separate the seal plate (5) and gasket
(6) from the bearing housing (8). Position the seal plate on a flat surface with the impeller side down.
Use a wooden dowel or other suitable tool to press on the back side of the stationary seat until the seat, O‐rings, and stationary element can be re moved.
T SERIES assembly. Disassemble the shaft and bearings only when there is evidence of wear or damage.
Shaft and bearing disassembly in the field is not recommended. These operations should be performed only in a properly‐ equipped shop by qualified personnel.
Remove the bearing housing drain plug (15) and drain the lubricant. Clean and reinstall the drain plug.
Disengage the hardware (8 and 9) and slide the bearing cap (23) and oil seal (16A) off the shaft
(18). Remove the bearing cap gasket (22) and press the oil seal from the bearing cap.
Place a block of wood against the impeller end of the shaft and tap the shaft and assembled bear ings (17 and 20) from the bearing housing.
After removing the shaft and bearings, clean and inspect the bearings in place as follows.
Do not attempt to separate the rotating portion of the seal from the shaft sleeve if the old seal is to be reused. The rubber bellows will adhere to the sleeve during use and attempting to separate them could damage the bellows.
Remove the shaft sleeve O‐ring (27).
If no further disassembly is required, refer to Seal
Installation .
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main tained, the bearing housing should not require dis
PAGE E - 8
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.
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 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.
MAINTENANCE & REPAIR
T SERIES
Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil.
OM-05348 small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
Position the inboard oil seal (16) in the bearing housing bore with the lip positioned as shown in
Figure 2. Press the oil seal into the housing until the face is just flush with the machined surface on the housing.
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 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 fit onto the shaft and a snug slip fit into the bearing housing. Replace the bearings, shaft, or bearing housing if the proper bearing fit is not achieved.
If bearing replacement is required, remove the out board bearing retaining ring (21) and use a bearing puller to remove the bearings from the shaft.
Press the inboard oil seal (16) from the bearing housing.
Shaft and Bearing Reassembly and Installation
(Figure 2)
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 as necessary.
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.
NOTE
Position the inboard bearing (17) on the shaft with the shielded side toward the impeller end of the shaft. Position the outboard bearing (20) on the shaft with the integral retaining ring on the bearing
O.D. toward the drive end of the shaft.
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.
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.
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.
Inspect the shaft for distortion, nicks or scratches, or for thread damage on the impeller end. Dress
MAINTENANCE & REPAIR
Heat the bearings to a uniform temperature no higher than 250 F (120 C) and slide the bearings onto the shaft, one at a time, until they are fully seated. This should be done quickly, in one con tinuous motion, to prevent the bearings from cool ing and sticking 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 shoulders.
PAGE E - 9
OM-05348
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.
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.
Secure the outboard bearing on the shaft with the bearing retaining ring (21).
Slide the shaft and assembled bearings into the bearing housing until the retaining ring on the out board bearing seats against the bearing housing.
When installing the shaft and bearings into the bearing bore, push against the outer race. Never hit the balls or ball cage.
Press the outboard oil seal (16A) into the bearing cap (23) with the lip positioned as shown in Figure
2. Replace the bearing cap gasket (22) and secure the bearing cap with the hardware (8 and 9). Be careful not to damage the oil seal lip on the shaft keyway.
Lubricate the bearing housing as indicated in LU
BRICATION .
Seal Installation
(Figures 2 and 4)
Most cleaning solvents are toxic and
T SERIES 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 seal cavity and shaft with a cloth soaked in fresh cleaning solvent. Inspect the stationary seat bore in the seal plate for dirt, nicks and burrs, and remove any that exist. The stationary seat bore must be completely clean before installing the seal.
A new seal assembly should be installed any time the old seal is removed from the pump. Wear patterns on the finished faces cannot be realigned during reassembly.
Reusing an old seal could result in prema ture failure.
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.
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 O‐ rings and seal sleeve 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 fol lows (see Figure 4).
PAGE E - 10 MAINTENANCE & REPAIR
T SERIES
SPRING
IMPELLER
IMPELLER
SHIMS
RETAINER
IMPELLER
SHAFT
ROTATING
ELEMENT
STATIONARY
ELEMENT
BELLOWS
OM-05348
SEAL PLATE
O‐RINGS
SHAFT
SLEEVE
O‐RING
INTEGRAL
SHAFT
SLEEVE
DRIVE BAND
STATIONARY
SEAT
Figure 4. Seal Assembly
This seal is not designed for operation at temperatures above 160 F (71 C). Do not use at higher operating temperatures.
cal or duct tape. Slide the O‐ring over the shaft until it seats against the shaft shoulder. Remove the tape covering the threads. Check to ensure that the shaft threads are free of any tape residue and clean as required before proceeding with seal installation.
Lubricate the stationary seat O‐rings with water or light oil, and install them in the stationary seat. In stall the stationary seal element in the stationary seat. Press this stationary subassembly into the front of the seal plate (5) until it seats squarely against the bore shoulder. A push tube made from a piece of plastic pipe would aid this installation.
The I.D. of the pipe should be slightly larger than the O.D. of the shaft sleeve.
Lubricate the shaft sleeve (4) 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 undercut end of the sleeve.
Slide the sleeve and subassembled seal onto the shaft until the seal faces contact. Continue to push the sleeve through the seal until the undercut end seats against the shaft shoulder.
Install the seal spring. Lubricate the seal as indi cated in LUBRICATION after the impeller is in stalled.
Install the seal plate gasket (6). Position the seal plate over the shaft and secure it to the bearing housing with the hardware (8 and 24). Be careful not to damage the stationary element on the shaft threads.
To prevent damaging the shaft sleeve O‐ring (27) on the shaft threads, cover the threads with electri
MAINTENANCE & REPAIR
If necessary to reuse an old seal in an emer gency, carefully separate the rotating and station ary seal faces from the bellows retainer and sta tionary seat.
PAGE E - 11
OM-05348
A new seal assembly should be installed any time the old seal is removed from the pump. Wear patterns on the finished faces cannot be realigned during reassembly.
Reusing an old seal could result in prema ture failure.
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.
Carefully wash all metallic parts in fresh cleaning solvent and allow to dry thoroughly.
Do not attempt to separate the rotating portion of the seal from the shaft sleeve when reusing an old seal. The rubber bel lows will adhere to the sleeve during use, and attempting to separate them could damage the bellows.
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; nev er mix old and new seal parts .
Install the stationary seal element in the stationary seat. Press this stationary subassembly into the seal plate bore until it seats squarely against the bore shoulder. A push tube made from a piece of plastic pipe would aid this installation. The I.D. of the pipe should be slightly larger than the O.D. of the shaft sleeve.
Slide the rotating portion of the seal (consisting of the shaft sleeve, spring, bellows and retainer, and rotating element) onto the shaft until the seal faces contact.
PAGE E - 12
T SERIES
Proceed with Impeller Installation and Adjust ment .
Impeller Installation and Adjustment
(Figure 2)
Inspect the impeller and replace it if cracked or badly worn. Inspect the impeller and shaft threads for dirt or damage and clean or dress the threads as required.
The shaft and impeller threads must be completely clean before reinstalling the im peller. Even the slightest amount of dirt on the threads can cause the impeller to seize to the shaft, making future removal difficult or impossible without damage to the im peller or shaft.
Install the same thickness of impeller adjusting shims (2) as previously removed. Apply `Never‐
Seez' or equivalent to the shaft threads and screw the impeller onto the shaft until tight. Be sure the seal spring seats squarely over the shoulder on the back side of the impeller.
NOTE
At the slightest sign of binding, immediately back the impeller off, and check the threads for dirt. Do not try to force the impeller onto the shaft .
A clearance of .025 to .040 inch (0,64 to 1,02 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.
NOTE
Proceed with Rotating Assembly Installation be fore installing the impeller capscrew and washer
(25 and 26). The rotating assembly must be in stalled in the pump casing in order to torque the im peller capscrew.
After the rotating assembly is installed in the pump casing, coat the threads of the impeller capscrew
(25) with `Never‐Seez' or equivalent compound
MAINTENANCE & REPAIR
T SERIES and install the impeller washer (26) and capscrew; torque the capscrew to 90 ft. lbs. (1080 in. lbs. or
12,4 m. kg.).
Rotating Assembly Installation
(Figure 1)
NOTE
If the pump has been completely disassembled, it is recommended that the back cover assembly be reinstalled at this point. The back cover assembly must be in place to adjust the impeller face clear ance.
Install the bearing housing and seal plate O‐rings
(13 and 27) and lubricate them with light grease.
Ease the rotating assembly into the pump casing.
Be careful not to damage the O‐rings.
Install the four sets of rotating assembly adjusting shims (26) using the same thickness as previously removed. Secure the rotating assembly to the pump casing with the hardware (17 and 18). Do not fully tighten the capscrews until the back cover has been installed and the impeller face clearance has been set.
A clearance of .010 to .020 inch (0,25 to 0,51 mm) between the impeller and the wear plate is also rec ommended for maximum pump efficiency. This clearance can be obtained by removing an equal amount of shims from each rotating assembly shim set until the impeller scrapes against the wear plate when the shaft is turned by hand. After the im peller scrapes, add approximately .015 inch (0,4 mm) of shims to each shim set.
Suction Check Valve Installation
(Figure 1)
Inspect the check valve assembly (25) and replace it if badly worn.
NOTE
The check valve assembly must be replaced as a complete unit. Individual parts are not sold sepa rately.
MAINTENANCE & REPAIR
NOTE
OM-05348
Position the check valve in the mounting slot in the pump casing (1) with the grooves in the rubber to ward the inside of the pump. Secure the assembly with the check valve cover (20) and the hardware
(21 and 22)
If the suction or discharge flanges were removed, replace the respective gaskets, apply `Permatex
Aviation No. 3 Form‐A‐Gasket' or equivalent com pound to the mating surfaces, and secure them to the pump casing with the attaching hardware.
Back Cover Installation
(Figure 1)
If the wear plate (14) was removed for replace ment, carefully center it on the back cover (12) and secure it with the hardware (23 and 24). The wear plate must be concentric to prevent binding when the back cover is installed.
Replace the back cover O‐ring (13) and lubricate it with a generous amount of No. 2 grease. Clean any scale or debris from the contacting surfaces in the pump casing that might interfere or prevent a good seal with the back cover. Slide the back cover as sembly into the pump casing. Be sure the wear plate does not bind against the impeller.
NOTE
To ease future disassembly, apply a film of grease or `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 by tightening the back cover nuts (16) evenly. Do not over‐tighten the nuts; they should be just tight enough to en sure a good seal at the back cover shoulder. Be sure the wear plate does not bind against the cas ing.
PRESSURE RELIEF VALVE
MAINTENANCE
(Figure 1)
The back cover is equipped with a pressure relief valve to provide additional safety for the pump and operator (refer to Liquid Temperature and Over heating in OPERATION ).
PAGE E - 13
OM-05348 T SERIES
It is recommended that the pressure relief valve as sembly be replaced at each overhaul, or any time the pump overheats and activates the valve. Never replace this valve with a substitute which has not been specified or provided by the Gorman‐Rupp
Company.
Periodically, the valve should be removed for in spection and cleaning. When reinstalling the relief valve, apply `Loctite Pipe Sealant With Teflon No.
592', or equivalent compound, on the relief valve threads. Position the valve as shown in Figure 1 with the discharge port pointing down.
Final Pump Assembly
(Figure 1)
Install the shaft key (19, Figure 2) and reconnect the power source. Be sure to install any guards used over the rotating members.
ounces (0,35 liter) of SAE No. 30 non‐detergent oil.
Clean and reinstall the vented plug. Check the oil level regularly through the sight gauge (10A) and maintain it at the middle of the gauge. When lubri cation is required, add SAE No. 30 non‐detergent oil through the vented plug.
Bearings
(Figure 2)
The bearing housing was fully lubricated when shipped from the factory. Check the oil level regu larly through the sight gauge (10) and maintain it at the middle of the gauge. When lubrication is re quired, add SAE No. 30 non‐detergent oil through the hole for the air vent (12). Do not over‐lubricate.
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 16 ounces (0,5 liter) clean oil. Change the oil more fre quently if the pump is operated continuously or in stalled in an environment with rapid temperature change.
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.
Install the suction and discharge lines and open all valves. Make certain that all piping connections are tight, properly supported and secure.
Be sure the pump and power source have been properly lubricated, see LUBRICATION .
Remove the fill plug assembly (9) and fill the pump casing with clean liquid. Reinstall the fill plug and tighten it. Refer to OPERATION , Section C, before putting the pump back into service.
LUBRICATION
Seal Assembly
(Figure 2)
Before starting the pump, remove the vented plug
(11) and fill the seal cavity with approximately 12
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.
Power Source
Consult the literature supplied with the power source, or contact your local power source repre sentative.
PAGE E - 14 MAINTENANCE & REPAIR
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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