Gorman-Rupp Pumps 11 1/2A20-B 519865 and up User Manual
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OM‐00573‐01
June 18, 1980
Rev. F 12‐15‐2015
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
10 SERIES PUMP
MODEL
11 1/2A20‐B
GORMAN‐RUPP PUMPS
www.grpumps.com
e
1980 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Release Valve Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coupled Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V‐Belt Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V‐BELT TENSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Rules of Tensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tension Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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OPERATION - SECTION C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE C - 1
PRIMING
STARTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lines With a Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lines Without a Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Temperature and Overheating
Strainer Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Vacuum Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BEARING TEMPERATURE CHECK
Cold Weather Preservation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE C - 1
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PAGE C - 3 i
TABLE OF CONTENTS
(continued)
TROUBLESHOOTING - SECTION D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE D - 1
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE D - 3
PUMP MAINTENANCE AND REPAIR ‐ SECTION E . . . . . . . . . . . . . . . . .
PAGE E - 1
STANDARD PERFORMANCE CURVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS LIST:
Pump Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Check Valve Removal and Disassembly
Back Cover Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Casing Removal
Impeller Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Removal and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Removal and Disassembly
Shaft and Bearing Reassembly and Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Reassembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Installation And Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Casing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Cover Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Check Valve Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Final Pump Assembly
LUBRICATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PAGE E - 11 ii
10 SERIES OM-00573
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
10 SERIES OM-00573
SAFETY ‐ SECTION A
This information applies to 10 Series 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 oper ation.
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 open or service the pump:
1. Familiarize yourself with this man ual.
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 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 pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids.
Do not attempt to pump liquids which may damage the pump or endanger per sonnel as a result of pump failure.
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.
After the pump has been installed, make certain that the pump and all piping or hose connections are tight, properly supported and secure before operation.
SAFETY PAGE A - 1
OM-00573 10 SERIES
Do not operate the pump without the shields and/or guards in place over the drive shaft, belts, and/or couplings, or other rotating parts. Exposed rotating parts can catch clothing, fingers, or tools, causing severe injury to person nel.
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 completely 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.
Never run this pump backwards. Be cer tain that rotation is correct before fully engaging the pump.
Pumps and related equipment must be in stalled and operated according to all na tional, local and industry standards.
Overheated pumps can cause severe burns and injuries. If overheating of the pump occurs:
1. Stop the pump immediately.
2. Ventilate the area.
3. Allow the pump to completely cool.
4. Check the temperature before opening any covers, plates, gauges, or plugs.
5. Vent the pump slowly and cau tiously.
6. Refer to instructions in this manual before restarting the pump.
PAGE A - 2 SAFETY
10 SERIES OM-00573
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.
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 (see Sec tion E, Page 1).
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.
For further assistance, contact your Gorman‐Rupp distributor or the Gorman‐Rupp Company.
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
Pump Dimensions
See Figure 1 for the approximate physical dimen sions of this pump.
OUTLINE DRAWING
INSTALLATION
Figure 1. Pump Model 11 1/2A20-B
PAGE B - 1
OM-00573
PREINSTALLATION INSPECTION
10 SERIES
POSITIONING PUMP
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.
Only operate this pump in the direction in 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. 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 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.
PAGE B - 2
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.
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 6 inches
(152,4 mm) must be maintained to permit removal of the cover.
INSTALLATION
10 SERIES OM-00573
SUCTION AND DISCHARGE PIPING
Pump performance is adversely effected by in creased suction lift, discharge elevation, and fric tion losses. See the performance curve 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 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
Installation closer to the pump may result in erratic readings.
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
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 inch (25,4 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.
PAGE B - 3
OM-00573 10 SERIES
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 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
PAGE B - 4 INSTALLATION
10 SERIES OM-00573
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
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.
A check valve in the discharge line is normally rec ommended, but it is not necessary in low dis charge head applications.
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.
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 (25,4 mm) in di ameter to minimize the chance of plugging.
In low discharge head applications (less than 30 feet (9,1 m)), it is recommended that the bypass 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 outline may be terminated with a six‐to‐eight foot
(1,8 to 2,4 m) length of 1‐1/4 inch (31,8 mm) 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.
If the application involves a high discharge head, gradually close the discharge throttling 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.
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.
In high discharge head applications (more than
30 feet (9,1 m), an excessive amount of liquid may be bypassed and forced back to the wet well under the full working pressure of the pump; this will re duce overall pumping efficiency. Therefore, it is recommended that a Gorman‐Rupp Automatic
Air Release Valve be installed in the bypass line.
Gorman‐Rupp Automatic Air Release Valves are reliable, and require minimum maintenance. See
Automatic Air Release Valves 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.
INSTALLATION PAGE B - 5
OM-00573 10 SERIES
Except in certain specific applications (to prevent flooding during service of an auto matic air release valve in a below‐ground lift station), if a manual shut‐off valve is in stalled anywhere in a bypass line, it must be a full‐opening, ball‐type valve to pre vent plugging by solids.
ter the pump completely cools, drain the liquid from the pump by removing the casing drain plug. Use caution when re moving the plug to prevent injury to per sonnel 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.
A manual shut‐off valve should not be installed in any bypass line. A manual shut‐off valve may inadvertently be left closed during operation. A pump which has lost prime may continue to operate without reaching prime, causing dan gerous overheating and possible explo sive rupture of the pump casing. Per sonnel could be severely injured.
Allow an over‐heated pump to com pletely cool before servicing. Do not re move plates, covers, gauges, or fittings from an over‐heated pump. Liquid with in 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
Some leakage (1 to 5 gallons [3.8 to 19 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.
PAGE B - 6 INSTALLATION
10 SERIES
90
_
LONG
RADIUS
ELBOW
CLEAN‐OUT
COVER
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
SUPPORT
BRACKET
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) DO NOT EX
TEND BELOW PUMP
OFF LIQUID LEVEL
SUCTION
LINE
OM-00573
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF‐PRIMING
CENTRIFUGAL
PUMP
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.
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
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.
NOTE
Check Rotation , Section C, before final alignment of the pump.
ALIGNMENT
The alignment of the pump and its power source is
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.
INSTALLATION PAGE B - 7
OM-00573 10 SERIES
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 4A).
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.
Figure 4A. Aligning Spider Type Couplings
PAGE B - 8
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure 4C. Alignment of V‐Belt Driven Pumps
INSTALLATION
10 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.
Belt Span
OM-00573
Deflection
Do not operate the pump without the shields and/or guards in place over the drive shaft, belts, and/or couplings, or other rotating parts. Exposed rotating parts can catch clothing, fingers, or tools, causing severe injury to person nel.
V‐BELT TENSIONING
General Rules of Tensioning
For new V‐belts, check the tension after 5, 20 and
50 hours of operation and re‐tension as required
(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 V‐belt tension is the lowest tension at which the belt will not slip under peak load conditions. Do not over‐tension V‐belts. Over‐tensioning will short en both V‐belt and bearing life. Under‐tensioning will cause belt slippage. Always keep belts free from dirt, grease, oil and other foreign material which may cause slippage.
Tension Measurement
Correct v‐belt tension can be achieved using a V‐ belt tension tester and Table 1 or 2. Use the tables to find the V‐belt size (cross‐section), the smallest sheave diameter, the belt type for your application.
The corresponding deflection force required for new or used belts is shown opposite the RPM range of the pump.
INSTALLATION
Figure 5. Belt Tension Measurement
The ratio of deflection to belt span is 1:64 for both
ASA and metric units. Therefore, a belt with a span of 64 inches would require a deflection of 1 inch at the force shown on the Tables for your particular application.
For example, if the span as measured in Figure 5 is
32 inches (813 mm), the V‐belt cross‐section is C, the smallest sheave diameter is 8 inches, the pump speed is 1250 RPM, and the belts are uncogged
Yy‐T type, then 11.5 lbs. of force on the tensioner should show 1/2‐inch (12,7 mm) of deflection.
A tension tester is available as an option from Gor man‐Rupp (P/N 29513-001). Other tension test ers are available from your local belt/sheave dis tributor, and work on a similar principal.
To use the Gorman‐Rupp tensioner, measure the belt span as shown in Figure 5. Position the bottom of the large O‐ring on the span scale of the tension er at the measured belt span. Set the small O‐ring on the deflection force scale to zero.
Place the tension tester squarely on the belt at the center of the belt span. Apply force on the plunger, perpendicular to the belt span, until the bottom of the large O‐ring is even with the top of the next belt, or with the bottom of a straight edge laid across the sheaves.
Read the force applied from the bottom of the small
O‐ring on the deflection force scale. Compare this force with the value shown in Table 1 or 2 and ad just the tension accordingly. Note that the tension for new belts is higher than that for used belts to allow for expected belt stretching. Do not over‐ten sion used belts to the higher deflection forces shown for new belts.
PAGE B - 9
OM-00573
Table 1. Sheave Diameter (Inches)
Deflection Force (Lbs.)
Cross
Section
Smallest
Sheave
Diameter
Range
A,AX
R.P.M.
Range
3.0 ‐ 3.6
1000‐2500
2501‐4000
3.8 ‐ 4.8
1000‐2500
2501‐4000
B,BX
C,CX
D
3V,
3VX
5V,
5VX
8V
5.0 ‐ 7.0
1000‐2500
2501‐4000
3.4 ‐ 4.2
4.4 ‐ 5.6
5.8 ‐ 8.6
7.0 ‐ 9.0
9.5 ‐ 16.0
12.0 ‐ 16.0
18.0 ‐ 20.0
2.2 ‐ 2.4
2.65 ‐ 3.65
860‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
200‐850
851‐1500
200‐850
851‐1500
1000‐2500
2501‐4000
1000‐2500
2501‐4000
4.12 ‐ 6.90
4.4 ‐ 6.7
7.1 ‐ 10.9
11.8 ‐ 16.0
12.5 ‐ 17.0
18.0 ‐ 22.4
1000‐2500
2501‐4000
500‐1749
1750‐3000
3001‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
200‐850
851‐1500
200‐850
851‐1500
Belt Deflection Force
Uncogged
Hy‐T Belts &
Uncogged
Hy‐T Torque
Team
Cogged
Torque‐Flex
& Machined
Edge torque
Team Belts
Used
Belt
3.7
2.8
4.5
3.8
5.4
4.7
14.1
12.5
11.5
9.4
30.4
25.6
5.3
4.5
6.3
6.0
11.5
9.4
15.5
14.6
33.0
26.8
39.6
35.3
3.6
3.0
4.9
4.4
12.7
11.2
New
Belt
18.9
16.7
23.4
21.8
49.3
39.9
59.2
52.7
5.5
4.2
6.8
5.7
8.0
7.0
5.1
4.4
7.3
6.6
Used
Belt
5.3
4.9
10.2
8.8
5.6
3.3
2.9
4.2
3.8
14.8
13.7
17.1
16.8
14.7
11.9
15.9
14.6
4.9
4.2
7.1
7.1
8.5
7.3
14.7
11.9
17.0
13.8
21.0
18.5
7.9
6.7
9.4
8.9
17.0
13.8
45.2
38.0
4.1
3.4
5.0
4.3
5.7
5.1
New
Belt
7.2
6.2
10.5
9.1
12.6
10.9
21.8
17.5
23.5
21.6
21.8
17.5
6.1
5.0
7.4
6.4
9.4
7.4
7.9
7.3
15.2
13.2
8.5
22.1
20.1
4.9
4.3
6.2
5.6
25.5
25.0
10 SERIES
Table 2. Sheave Diameter (Millimeters)
Deflection Force (KG.)
Cross
Section
Smallest
Sheave
Diameter
Range
A,AX
R.P.M.
Range
75 ‐ 90
1000‐2500
2501‐4000
91 ‐ 120
1000‐2500
2501‐4000
B,BX
C,CX
D
3V,
3VX
125 ‐ 175
1000‐2500
2501‐4000
85 ‐ 105
106 ‐ 140
141 ‐ 220
175 ‐ 230
231 ‐ 400
305 ‐ 400
401 ‐ 510
55 ‐ 60
61 ‐ 90
860‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
200‐850
851‐1500
200‐850
851‐1500
1000‐2500
2501‐4000
1000‐2500
2501‐4000
5V,
5VX
8V
91 ‐ 175
110 ‐ 170
171 ‐ 1275
276 ‐ 400
315 ‐ 430
431 ‐ 570
1000‐2500
2501‐4000
500‐1749
1750‐3000
3001‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
200‐850
851‐1500
200‐850
851‐1500
Belt Deflection Force
Uncogged
Hy‐T Belts &
Uncogged
Hy‐T Torque
Team
Cogged
Torque‐Flex
& Machined
Edge torque
Team Belts
Used
Belt
1.7
1.3
2.0
1.7
2.4
2.1
6.4
5.7
11.3
9.6
13.8
11.6
2.4
2.0
2.9
2.7
5.2
4.3
7.0
6.6
15.0
12.2
18.0
16.0
1.6
1.4
2.2
2.0
5.8
5.1
New
Belt
8.6
7.6
10.6
9.9
22.4
18.1
26.8
23.9
2.5
1.9
3.1
2.6
3.6
3.2
2.3
2.0
3.3
3.0
Used
Belt
1.5
1.3
1.9
1.7
2.4
2.2
4.6
4.0
2.5
6.7
6.2
7.8
7.6
16.8
14.2
20.5
17.2
7.7
6.3
9.5
8.4
3.6
3.0
4.3
4.0
1.9
1.5
2.3
2.0
2.6
2.3
2.2
1.9
3.2
3.2
3.9
3.3
6.7
5.4
7.2
6.6
New
Belt
3.3
2.8
4.8
4.1
5.7
4.9
9.9
7.9
2.8
2.3
3.4
2.9
4.3
3.4
10.7
9.8
3.6
3.3
6.9
6.0
3.9
10.0
9.1
2.2
2.0
2.8
2.5
11.6
11.3
PAGE B - 10 INSTALLATION
10 SERIES OM-00573
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and decals attached to the pump.
1. The pump is being put into service for the first time.
2. The pump has not been used for a consider able length of time.
3. The liquid in the pump casing has evapo rated.
Once the pump casing has been filled, the pump will prime and reprime as necessary.
This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids.
Do not attempt to pump liquids which may damage the pump or endanger per sonnel as a result of pump failure.
Pump speed and operating condition points must be within the continuous per formance range shown on the curve (see
Section E, Page 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.
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. If the pump is operated in the wrong direction, the impeller could become loosened from the shaft and seriously damage the pump.
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:
OPERATION
Only operate this pump in the direction in 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.
PAGE C - 1
OM-00573 10 SERIES
Consult the operating manual furnished with the power source before attempting to start the power source.
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 incorrect on a single‐phase motor, consult the lit erature supplied with the motor for specific instruc tions.
OPERATION
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.
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 completely cool before servic ing it. Refill the pump casing with cool liquid.
Lines With a Bypass
Close the discharge throttling valve (if so equipped) so that the pump will not have to prime against the weight of the liquid in the discharge line. Air from the suction line will be discharged through the bypass line back to the wet well during the priming cycle. When the pump is fully primed and liquid is flowing steadily from the bypass line, open the discharge throttling valve. 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 engine. Priming is indicated by a positive reading on the discharge pressure gauge or by a quieter operation. The pump may not prime immediately 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.
PAGE C - 2
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 completely cool before servicing.
Strainer Check
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 (see Section E,
Page 1).
OPERATION
10 SERIES
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.
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.
OM-00573
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 Section E). Bear ing overheating can also be caused by shaft misalignment and/or excessive vibration.
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 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.
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.
OPERATION PAGE C - 3
10 SERIES
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
OM-00573
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
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 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.
Suction check valve contaminated or damaged.
Air leak in suction line.
Lining of suction hose collapsed.
Add liquid to casing. See
Correct leak.
Replace suction hose.
PRIMING
Clean or replace check valve.
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.
Check strainer and clean if neces sary.
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.
Strainer clogged.
Check strainer and clean if neces sary.
Suction intake not submerged at proper level or sump too small.
Check installation and correct sub mergence as needed.
.
TROUBLESHOOTING PAGE D - 1
OM-00573 10 SERIES
TROUBLE
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
POSSIBLE CAUSE
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
POWER
PUMP
CLOGS FRE
QUENTLY
EXCESSIVE NOISE
BEARINGS
RUN TOO HOT
Pump speed too high.
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.
Bearing temperature is high, but within limits.
Low or incorrect lubricant.
Suction and discharge lines not properly supported.
Drive misaligned.
PROBABLE REMEDY
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.
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.
PAGE D - 2 TROUBLESHOOTING
10 SERIES OM-00573
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.
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
I
I
I
C
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.
TROUBLESHOOTING PAGE D - 3
10 SERIES OM-00573
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 11 1/2A20-B
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-00573
PARTS PAGE
ILLUSTRATION
10 SERIES
PAGE E - 2
Figure E-1. Pump Model 11 1/2A20-B
MAINTENANCE & REPAIR
10 SERIES OM-00573
PARTS LIST
Pump Model 11 1/2A20-B
(From S/N 519865N 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
.
1 PUMP CASING
2 IMPELLER
SEE NOTE BELOW
12368 10010 1
3 SEAL ASSEMBLY 46512-035 1
.
4 FILL PLUG ASSY 48271-066 1
5 NAME PLATE 38818-021 13990 1
6 ADJ SHIM SET
7 GASKET SET
8 SEAL PLATE
513A 17090
504G 18000
38272-114 10010
9 BOTTLE OILER S1933 1
10 REDUCER PIPE BUSHING AP0402 15079 1
11 PIPE CPLG
12 PIPE NIPPLE
AE04 15079
T0410 15079
1
1
1
1
1
13 SEAL
14 SLINGER RING
15 HEX NUT
16 GREASE FITTING
S1659 3
3228A 19120 1
D06 15991 8
S1404 2
17 SLEEVE
.
18 STUD
19 VENTED PIPE PLUG
.
20 PIPE PLUG
21 HEX NUT
31411-097 17030
C0607 15991
4823 15079
P06 15079
D04 15991
22 HEX HEAD CAP SCREW B0404 15991
23 LOCK WASHER
24 PEDESTAL FOOT
J04 15991
8857 24000
25 BEARING CAP
26 BEARING SHIM SET
8853A 10010
8540 15990
27 KEY N0307 15990
28 IMPELLER SHAFT 38514-004 15010
29 BALL BEARING S1403
30 PEDESTAL 8852B 10010
.
31 HEX HEAD CAP SCREW B0808 15991
32 CLAMP SCREW 8618 24000
33 CLAMP BAR 12370 11010
2
4
6
1
1
1
1
4
1
1
1
1
2
1
2
1
1
INDICATES PARTS RECOMMENDED FOR STOCK
.
INCLUDED WITH REPAIR
PUMP CASING ASSY
46471-513 1
ITEM
NO.
PART NAME PART
NUMBER
QTY
34 COVER PLATE
35 GASKET
12369 10010
12369G 20000
36 WEAR PLATE ASSEMBLY 2643 15990
.
37 STUD C0606 15991
38 SUCTION FLANGE 8599 10010 1
39 FLAP VALVE ASSEMBLY 1352 1
1
4
RD HD MACH SCREW
LOCK WASHER
SMALL VLV WEIGHT
X0403 17090
J04 17090
1354 15160 1
1
1
CHECK VLV GASKET
LARGE VLV WEIGHT
.
40 WARNING PLATE
.
41 DRIVE SCREW
.
42 PIPE PLUG
43 SPRING WASHER
NOT SHOWN:
ROTATION DECAL
INSTRUCTION LABEL
SUCTION STICKER
DISCHARGE STICKER
STICKER
INSTRUCTION TAG
INSTRUCTION TAG
LUBRICATION DECAL
G‐R DECAL
1352G 19070
1353 10010
2613EV 13990
BM#04-03 17000
P04 15079
31512-010 17030
1
8
1
1
2
1
2613M 1
2613DK 1
6588AG
6588BJ
GR-03
1
1
6588AH 1
38817-011 1
38817-010 1
38816-075 1
1
1
1
OPTIONAL:
HI TEMP SHUT DOWN KITS:
120
_
F
130
_
F
145
_
F
48313-257
48313-256
48313-186
HIGH TEMP SHUTDOWN THERMOSTAT KIT:
145 _ F 48313-172 1
1
1
1
MAINTENANCE & REPAIR PAGE E - 3
OM-00573 10 SERIES
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 sectional view (see Figure E-1) and the ac companying parts list.
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 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:
1. Familiarize yourself with this man ual.
2. Disconnect or lock out the power source to ensure that the pump will remain inoperative.
PAGE E - 4
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.
Suction Check Valve Removal and Disassembly
Before attempting to service the pump, remove the pump casing drain plug (20) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve assembly (39), remove the suction piping. Remove the nuts (15) securing the suction flange (38) and check valve assembly (39) to the pump casing (1).
Inspect the check valve parts for wear or damage.
If replacement is required, remove the attaching hardware and separate the check valve gasket and weights.
If no further disassembly is required, see Suction
Check Valve Installation .
Back Cover Removal
The wear plate assembly (36) is easily accessible and may be serviced by removing the back cover assembly (34). Loosen the clamp bar screw (32) and remove the clamp bar (33). Pull the back cover and wear plate from the pump casing. Remove the back cover gasket (35). Clean the mating surfaces of the back cover plate and pump casing.
Inspect the wear plate and replace it if badly scored or worn. To remove the wear plate, disengage the hardware (21 and 23) securing it to the back cover.
If no further disassembly is required, see Back
Cover Installation .
MAINTENANCE & REPAIR
10 SERIES OM-00573
Pump Casing Removal
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.
To service the impeller or seal assembly, discon nect the discharge piping. Remove the hardware securing the pump to the base. Disconnect the power source. Tie and tag any leveling shims used under the pump mounting feet to ease reassembly.
Remove the nuts (15) and separate the pump cas ing and gasket set (7) from the seal plate (8) and pedestal (30). Clean the mating surfaces of the seal plate and pump casing. Tie and tag the gas kets, or measure and record their thickness for ease of reassembly.
Impeller Removal
Before removing the impeller, remove the bottle oil er and piping (9, 10, 11 and 12). Remove the seal cavity drain plug (42) and drain the oil from the seal cavity to prevent the oil from escaping when the im peller is removed. Clean and reinstall the drain plug.
Immobilize the impeller (2) by wedging a block of wood between the vanes. If removed, install the shaft key (27). Install a lathe dog on the drive end of the shaft (28) with the “V” notch positioned over the shaft keyway.
With the impeller rotation still blocked, strike the lathe dog sharply in a counterclockwise direction
MAINTENANCE & REPAIR
(when facing the drive end of the shaft). The impel ler may also be loosened by using a long piece of heavy bar stock to pry against the arm of the lathe dog in a counterclockwise direction (when facing the drive end of the shaft) as shown in Figure 2.
Use caution not to damage the shaft or keyway.
When the impeller breaks loose, remove the lathe dog and wood block and unscrew the impeller from the shaft.
Turn
Counterclockwise
Lathe Dog Arm
Heavy
Bar Stock
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Figure 2. Loosening Impeller
Unscrew the impeller in a counterclockwise direc tion. Use caution when removing the impeller; ten sion on the seal spring will be released as the im peller is unscrewed.
Inspect the impeller and replace it if cracked or badly worn. Slide the impeller adjusting shims (6) off the impeller shaft. Tie and tag the shims or mea sure and record their thickness for ease of reas sembly.
Seal Removal and Disassembly
Remove the spring centering washer (43) and the seal spring. Slide the shaft sleeve (17) and rotating portion of the seal off the shaft as a single unit. Ap ply oil to the sleeve and work it up under the bel lows. Slide the rotating portion of the seal off the shaft.
Slide the seal plate and seal assembly off the shaft as a single unit. Place the seal plate on a flat sur face with the impeller side down. Use a suitably sized dowel to press the seal components from the seal plate.
PAGE E - 5
OM-00573 10 SERIES
Pry or press the oil seal (3) from the seal plate. In spect the seal plate and replace it if cracked or badly worn.
If no further disassembly is required, see Seal
Reassembly and Installation .
Shaft and Bearing Removal and Disassembly
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.
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 pedestal, shaft and all component parts
(except the bearings) with a soft cloth soaked in cleaning solvent. Inspect the parts for wear or dam age and replace as necessary.
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 slinger ring (14) and shaft key (27).
Disengage the hardware (22 and 23) and remove the pedestal foot (24). Slide the bearing cap (25) and oil seal (13) off the shaft.
NOTE
There are no provisions for draining the lubricant from the pedestal. Place a drip pan under the ped estal before disassembly.
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.
Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil.
Use an arbor (or hydraulic) press and a dowel to remove the oil seal from the bearing cap.
Slide the bearing shims (26) off the impeller shaft.
Tie and tag the shims or measure and record their thickness for ease of reassembly.
Place a block of wood against the impeller end of the shaft and tap the shaft and assembled bear ings (29) from the pedestal.
Be careful not to dam age the shaft.
After removing the shaft and bearings, clean and inspect the bearings in place as follows.
To prevent damage during removal from
PAGE E - 6
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 pedestal.
Replace the bearings, shaft, or pedestal if the proper bearing fit is not achieved.
If bearing replacement is required, use a bearing puller to remove the bearings from the shaft.
Press the inboard oil seal (13) from the pedestal bore.
MAINTENANCE & REPAIR
10 SERIES OM-00573
Shaft and Bearing Reassembly and Installation
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly .
out of position in shrinking. If movement has oc curred, use a suitably sized sleeve and a press to reposition the bearings.
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.
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.
Position the inboard oil seal (13) in the pedestal
(30) with the lip positioned as shown in Figure 1.
Press the oil seal into the pedestal until the face is just flush with the inside diameter of the chamfer on the housing as shown in Figure 1.
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.
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.
After installation, pack the bearings by hand with
No. 0 lithium base grease until fully lubricated.
Slide the shaft and assembled bearings into the pedestal until the inboard bearing seats against the pedestal bore. Be careful not to damage the oil seal lip.
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), and slide the bearings onto the shaft, one at a time, until they are fully seated against the shaft shoulders. This should be done quickly, in one continuous motion, to prevent the bearings from cooling and sticking on the shaft.
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 (13) into the bearing cap (25) with the lip positioned as shown in Figure
1. Install the same thickness of bearing adjusting shim (26) as previously removed. Install the bear ing cap in the pedestal with the lubrication fitting
(16) up. Install the pedestal foot (24) and secure with the hardware (22 and 23). Be careful not to damage the oil seal lip on the shaft keyway.
NOTE
Shaft endplay should be between .002 and .010
inch (.05 to .25 mm). Add or remove bearing adjust ing shims to achieve the correct endplay.
Use caution when handling hot bear ings to prevent burns.
After the bearings have been installed and allowed to cool, check to ensure that they have not moved
MAINTENANCE & REPAIR
Slide the slinger ring (14) onto the shaft.
Lubricate the pedestal as indicated in LUBRICA
TION at the end of this section.
PAGE E - 7
OM-00573 10 SERIES
Seal Reassembly and Installation
Clean the seal cavity and shaft with a cloth soaked in fresh cleaning solvent.
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 impeller shaft for damage. Small scratches or nicks may be removed with a fine file or emery cloth. If excessive wear exists, the shaft will have to be replaced.
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 (33), or re place it if there are nicks or cuts on either end. If any components 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 O‐ rings and shaft sleeve (17) with water or a very small amount of oil, and apply a drop of light lubri cating oil on the finished faces. Assemble the seal as follows, (see Figure 3).
PAGE E - 8 MAINTENANCE & REPAIR
10 SERIES
SPRING CENTERING
WASHER
SPRING
IMPELLER
DRIVE BANDS
OM-00573
SEAL PLATE
STATIONARY
ELEMENT
STATIONARY
SEAT
IMPELLER
SHAFT
SHAFT
SLEEVE
O‐RINGS
IMPELLER
SHIMS
BELLOWS
ROTATING
ELEMENT
Figure 3. Seal Assembly
Slide the seal plate over the shaft until fully seated against the pedestal (30). Be careful not to dam age the oil seal lip on the shaft threads.
This seal is not designed for operation at temperatures above 160 _ F (71 _ C). Do not use at higher operating temperatures.
Position the seal plate (8) on a flat surface with the impeller side down. Apply a light coat of oil to the oil seal (13) and press it into the seal plate with the lips positioned as shown in Figure 1.
With the seal plate on a flat surface with the impel ler side up, press the stationary subassembly (con sisting of the stationary seat, O‐rings and station ary element) into the seal plate until the stationary seat bottoms against the seal plate bore. A push tube cut from a length of plastic pipe would aid this installation. The I.D. of the pipe should be approxi mately the same diameter as the I.D. of the seal spring.
MAINTENANCE & REPAIR
Align the threaded seal lubricant hole with the ped estal opening and temporarily secure the seal p late using two capscrews and nuts (3/8‐16 UNC X 1
1/2 inch long, not supplied).
Slide the rotating subassembly (consisting of the rotating element retainer and bellows) onto the lu bricated shaft sleeve until the rotating element is just flush with the chamfered end of the sleeve.
Slide the sleeve and rotating subassembly onto the shaft until the seal elements contact. Continue to push the sleeve through the seal until it bottoms against the shaft shoulder. Be careful not to dam age or roll the lip of the oil seal (13).
Install the seal spring and spring centering washer
(43).
Reinstall the bottle oiler and piping (9, 10, 11 and
12), and lubricate the seal assembly as indicated in
LUBRICATION , after the impeller has been in stalled.
PAGE E - 9
OM-00573 10 SERIES
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or badly worn. Install the same thickness of impeller shims (6) as previously removed, and screw the impeller onto the shaft until tight.
A clearance of .010 to .012 inch (0,25 to 0,30 mm) between the impeller and the seal plate is neces sary for maximum pump efficiency. Measure this clearance and add or remove impeller shims until this clearance is reached.
NOTE
Be sure the seal plate is tight against the pedestal while measuring this clearance.
Clean any scale or debris from the contacting sur faces on the pump casing that might prevent a good seal with the back cover. Replace the back cover gasket (35) and slide the back cover assem bly 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 that contacts the pump casing. This action will reduce rust and scale build‐up.
Pump Casing Installation
Remove the hardware temporarily securing the seal plate to the pedestal. Install the same thick ness of pump casing gaskets (7) as previously re moved, and secure the pump casing (1) to the seal plate (8) and pedestal (30) with the nuts (15). Do not fully tighten the nuts at this time.
NOTE
The back cover assembly must be in place to adjust the impeller face clearance.
A clearance of .008 to .015 inch (0,20 to 0,38 mm) between the impeller and the wear plate (38) is also recommended for maximum pump efficiency. Set this clearance by adding or removing gaskets in the pump casing gasket set (7) until the impeller scrapes against the wear plate when the shaft is turned. After the impeller scrapes, add approxi mately .008 inch (0,20 mm) of gaskets.
After the face clearance has been set, tighten the nuts (15) securing the pump casing to the pedes tal.
Back Cover Installation
If the wear plate (36) was removed for replace ment, secure it to the cover plate (34) using the at taching hardware (21 and 23) at this time. The wear plate must be concentric to prevent binding when the back cover is installed.
PAGE E - 10
Secure the back cover assembly by installing the clamp bar (33) and tightening the clamp bar screw
(32). Do not over‐tighten the clamp bar screw; it should be just tight enough to seal the back cover shoulder.
Suction Check Valve Installation
Inspect the check valve components and replace as required. Subassemble the check valve weights and check valve gasket using the previously re moved hardware.
Position the check valve assembly (39) over the studs (37) with the large weight toward the inside of the pump casing. Install the suction flange and se cure with the nuts (15). Check the operation of the check valve to ensure proper seating and free movement.
Final Pump Assembly
Secure the pump to the base with the previously re moved hardware. Connect the power source. Be sure to reinstall any leveling shims used under the pump mounting feet.
Be sure the pump and power source are securely mounted to the base.
Install the suction and discharge lines and open all valves. Make certain that all piping connections are tight, properly supported and secure. Open all the valves in the suction and discharge lines.
Be sure the pump and power source have been properly lubricated, see LUBRICATION .
Remove the fill plug assembly (4) and fill the pump casing with clean liquid. Reinstall the fill plug and tighten it.
MAINTENANCE & REPAIR
10 SERIES OM-00573
Refer to OPERATION , Section C, before putting the pump back into service.
LUBRICATION
Seal Assembly
Fill the bottle oiler (9) with SAE No. 30 non‐deterg ent oil. Check the oil level regularly and keep the bottle oiler full.
Bearings
The pedestal was fully lubricated when shipped from the factory. Under normal conditions, add one shot of No. 0 lithium base grease from a grease gun through the grease fittings (16) after each 250 hours of operation or once each month, whichever comes first. Do not over lubricate. Over lubrication can cause the bearings to over heat, resulting in premature bearing failure.
If grease is forced out around the shaft as new grease is added, the lubrication cavity is full and no more grease should be added at this time.
There are no provisions in the bearing cavity to drain or flush the lubricant. The pump and pedestal must be disassembled to completely clean and maintain this cavity.
Under normal conditions, change the grease after each 5000 hours of operation, or at 12 month inter vals, whichever comes first. Change the grease more frequently if the pump is operated continu ously or installed in an environment where variable hot and cold temperatures are common.
When lubricating a dry (overhauled) pedestal, fill the cavities through the lubrication fittings with ap proximately 2 ounces (57 grams) of grease each.
For cold weather operation, consult the factory or a lubricant supplier for the recommended grade of lubricant.
Power Source
Consult the literature supplied with the power source, or contact your local power source repre sentative.
MAINTENANCE & REPAIR PAGE E - 11
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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