GORMAN-RUPP 83A3-B Series Vacuum Pump User Manual

GORMAN-RUPP 83A3-B Series Vacuum Pump

Product Information

80 Series Pump

The 80 Series Pump manufactured by the Gorman-Rupp Company is a powerful and durable pump for use in a variety of applications. The Model 83A3-B comes with an installation, operation, and maintenance manual with a parts list for easy reference. The pump is made in Mansfield, Ohio by the Gorman-Rupp Company and is also sold by Gorman-Rupp of Canada Limited in St. Thomas, Ontario. The product can be registered online at www.grpumps.com with a valid serial number and email address.

Installation Instructions

1. Before installation, inspect the pump for any damage or defects.
2. Position the pump on a secure and level surface.
3. Connect the inlet and outlet pipes to the pump according to the manufacturer’s instructions.
4. Prime the pump before starting it up.

Operation Instructions

1. To start the pump, ensure that it is properly primed first.
2. Check the rotation of the pump to make sure it is in the correct direction.
3. Once the pump is running, monitor it for any unusual noises or vibrations.

Maintenance Instructions

• Regular preventive maintenance is recommended for the 80 Series Pump to ensure optimal performance and longevity. The maintenance and repair section of the manual provides detailed instructions on how to disassemble and reassemble the pump for cleaning and repair purposes.

Troubleshooting

• If any issues arise with the 80 Series Pump, refer to the troubleshooting section of the manual for solutions to common problems.

Performance Curve

• The manual includes a standard performance curve for the 80 Series Pump to help users determine the expected performance based on flow rate and head pressure.

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:—————————

INTRODUCTION

• Thank You for purchasing a Gorman‐Rupp pump. Read this manual carefully to learn how to safely install and operate your pump. Failure to do so could result in personal injury or damage to the pump.
• This Installation, Operation, and Maintenance manual is designed to help you achieve the best performance and longest life from your Gorman‐Rupp pump.
• This pump is an 80 Series, semi‐open impeller, self‐priming centrifugal model with a suction check valve. The pump is designed for straight‐in suction where the medium being pumped enters directly into the impeller eye. It is designed for handling most non‐volatile, non‐flammable liquids contain­ing specified entrained solids. The basic material of construction for wetted parts is gray iron. The pump may be approved or modified for handling volatile, flammable liquids only by the Gorman‐Rupp Company or an authorized distributor.
• Because pump installations are seldom identical, this manual cannot possibly provide detailed in­structions and precautions for every aspect of each specific application.
• Therefore, it is the re­sponsibility 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 com­promised by the installation. Pumps and related equipment must be installed and operated ac­cording to all national, local and industry stan­dards.
• If there are any questions regarding the pump or its application which are not covered in this man­ual or in other literature accompanying this unit, please contact your
• Gorman‐Rupp distributor, or write:
• The Gorman‐Rupp Company
• P.O. Box 1217
• Mansfield, Ohio 44901-1217
• Phone: (419) 755-1011 or:
• Gorman‐Rupp of Canada Limited
• 70 Burwell Road
• St. Thomas, Ontario N5P 3R7
• Phone: (519) 631-2870
• The following are used to alert maintenance per­sonnel to procedures which require special atten­tion, to those which could damage equipment, and to those which could be dangerous to personnel:

DANGER

Immediate hazards which WILL result in severe personal injury or death. These instructions describe the procedure re­quired and the injury which will result from failure to follow the procedure.

WARNING

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.

CAUTION

• Hazards or unsafe practices which COULD result in minor personal injury or product or property damage. These instructions describe the requirements and the possi­ble damage which could result from failure to follow the procedure.

NOTE

• Instructions to aid in installation, operation,and maintenance, or which clarify a procedure.

SAFETY

• This information applies to 80 Series ba­sic pumps. Gorman‐Rupp has no con­trol over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before attempting to begin oper­ation.
• This manual will alert personnel to known procedures 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 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 main­tenance procedures are used, and that any procedures not addressed in this manual are performed only after estab­lishing that neither personal safety nor pump integrity are compromised by such practices.

WARNING: 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 opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cau­tiously.
7. Drain the pump.

• This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids.
• Only the Gorman‐Rupp Company or an authorized Gorman‐Rupp distributor may modify a pump or approve its use for handling volatile, flammable liquids. If the pump is used for handling volatile, flammable liquids, all drivers and/or controls must meet industry standards and codes for use in an explosive atmo­sphere.
• Do not attempt to pump liquids for which the pump, driver and/or con­trols have not been approved, or which may damage the pump or endanger per­sonnel as a result of pump failure.
• If this pump has been approved for use with volatile and/or flammable liquids, be certain proper safety practices are followed before operating or servicing the pump. Provide adequate ventilation, prohibit smoking, wear static‐resistant clothing and shoes. Clean up all fuel spills immediately after occurrence.
• Do not install and operate a non‐explo­sion proof motor in an explosive atmo­sphere. Install, connect, and operate the motor in accordance with the Na­tional Electric Code and all local codes. If there is a conflict between the instruc­tions in the manual accompanying the unit and the National Electric Code or the applicable local code, the National or local code shall take precedence.
• If this pump is used with volatile and/or flammable liquids, overheating may produce dangerous fumes. Take pre­cautions to ensure the area surrounding the pump is adequately ventilated. Al­low the pump to cool and use extreme caution when venting the pump, or when removing covers, plates, plugs, or fittings.
• Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries to personnel or dam­age to equipment. Suction and dis­charge hoses and piping must be re­moved from the pump before lifting.
• 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.
• 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 person­nel.
• Do not operate the pump against a closed discharge valve for long periods of time. If operated against a closed dis­charge valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
• 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 cau­tiously.
6. Refer to instructions in this manual before restarting the pump.

• Do not remove plates, covers, gauges, pipe plugs, or fittings from an over­heated pump. Vapor pressure within the pump can cause parts being disen­gaged to be ejected with great force. Al­low the pump to completely cool before servicing.
• Never run this pump backwards. Be cer­tain that rotation is correct before fully engaging the pump.

CAUTION

Pumps and related equipment must be in­stalled and operated according to all na­tional, local and industry standards.

INSTALLATION

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 ar­range the pump and piping.
• Most of the information pertains to a standard static lift application where the pump is positioned above the free level of liquid to be pumped.
• If installed in a flooded suction application where the liquid is supplied to the pump under pressure, some of the information such as mounting, line configuration, and priming must be tailored to the specific application. Since the pressure supplied to the pump is critical to performance and safety, be sure to limit the incoming pressure to 50% of the maximum permissible operating pressure as shown on the pump performance curve (see Sec­tion E, Page 1).
• For further assistance, contact your Gorman‐Rupp distributor or the Gorman‐Rupp Company.

Pump Dimensions

• See Figures 1 and 2 for the approximate physical di­mensions of this pump.

OUTLINE DRAWING

PREINSTALLATION INSPECTION

• The pump assembly was inspected and tested be­fore shipment from the factory. Before installation, inspect the pump for damage which may have oc­curred 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 hard­ware. Since gaskets tend to shrink after dry­ing, check for loose hardware at mating sur­faces.
• c. Carefully read all tags, decals, and markings on the pump assembly, and perform all duties indicated.

CAUTION

• Only operate this pump in the direction in­dicated by the arrow on the pump body and on the accompanying decal. Other­wise, 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. Re­fer to LUBRICATION in the MAINTENANCE AND REPAIR section of this manual and per­form duties as instructed.
• e. If the pump has been stored for more than 12 months, some of the components or lubri­cants may have exceeded their maximum shelf life. These must be inspected or re­placed 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 deter­mine the repair or updating policy. Do not put the pump into service until appropriate action has been taken.

POSITIONING PUMP

WARNING

• Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries to personnel or dam­age to equipment. Suction and dis­charge hoses and piping must be re­moved from the pump before lifting.

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.

CAUTION

• The pump assembly can be seriously damaged if the cables or chains used to lift and move the unit are improperly wrapped around the pump.

Mounting

• Locate the pump in an accessible place as close as practical to the liquid being pumped. Level mount­ing is essential for proper operation.
• The pump may have to be supported or shimmed to provide for level operation or to eliminate vibra­tion.

SUCTION AND DISCHARGE PIPING

• Pump performance is adversely effected by in­creased suction lift, discharge elevation, and fric­tion 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, rein­forced type to prevent collapse under suction. Us­ing piping couplings in suction lines is not recom­mended.

Line Configuration

• Keep suction and discharge lines as straight as possible to minimize friction losses. Make mini­mum use of elbows and fittings, which substan­tially 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 ex­actly with the pump port. Never pull a pipe line into place by tightening the flange bolts and/or cou­plings.
• Lines near the pump must be independently sup­ported 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.

SUCTION LINES

• To avoid air pockets which could affect pump prim­ing, 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 in­stalled with the flat part of the reducers uppermost to avoid creating air pockets. Valves are not nor­mally used in suction lines, but if a valve is used, install it with the stem horizontal to avoid air pock­ets.

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 3/4-inch (19,1 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 air­tight seal. Follow the sealant manufacturer’s rec­ommendations when selecting and applying the pipe dope. The pipe dope should be compatible with the liquid being pumped.

Suction Lines 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 diame­ter 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 suc­tion inlet because the inflow will carry air down into the sump, and air entering the suction line will re­duce pump efficiency.
• If it is necessary to position inflow close to the suc­tion 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 dis­tance 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. veloc­ity.

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).

DISCHARGE LINES

Siphoning

• Do not terminate the discharge line at a level lower than that of the liquid being pumped unless a si­phon breaker is used in the line. Otherwise, a si­phoning 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.
  With high discharge heads, it is recommended that a throttling valve and a system check valve be in­stalled in the discharge line to protect the pump from excessive shock pressure and reverse rota­tion when it is stopped.

CAUTION

• If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.

Bypass Lines

• If a system check valve is used due to high dis­charge head, it may be necessary to vent trapped air from the top of the pump during the priming process. This may be accomplished by installing a bypass line from the top of the pump, back to the source of liquid. The end of the bypass line must be submerged. The line must be large enough to pre­vent clogging, but not so large as to affect pump discharge capacity.

ALIGNMENT

• The alignment of the pump and its power source is critical for trouble‐free mechanical operation. In either a flexible coupling or V‐belt driven system, the driver and pump must be mounted so that their shafts are aligned with and parallel to each other. It is imperative that alignment be checked after the pump and piping are installed, and before opera­tion.

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. Misalign­ment 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.

WARNING

• When checking alignment, disconnect the power source to ensure that the pump will remain inoperative.

CAUTION

• Adjusting the alignment in one direction may alter the alignment in another direc­tion. 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 de­grees. The coupling is in alignment when the hub ends are the same distance apart at all points (see Figure 3A).
• Align non‐spider type couplings by using a feeler gauge or taper gauge between the coupling halves every 90 degrees. The coupling is in alignment when the hubs are the same distance apart at all points (see Figure 3B).
• 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 misalign­ment.

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 pul­leys are properly aligned (see Figure 3C). In drive systems using two or more belts, make certain that the belts are a matched set; unmatched sets will cause accelerated belt wear.
• Tighten the belts in accordance with the belt manu­facturer’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 ra­tio; overspeeding the pump may damage both pump and power source.

WARNING

• 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 person­nel.

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 re­quired 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 short­en 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.
• 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 4 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 Gor­man‐Rupp (P/N 29513-001). Other tension test­ers are available from your local belt/sheave dis­tributor and work on a similar principal.
• To use the Gorman‐Rupp tensioner, measure the belt span as shown in Figure 4. Position the bottom of the large O‐ring on the span scale of the tension­er 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 ad­just 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‐ten­sion used belts to the higher deflection forces shown for new belts.

Table 1. Sheave Diameter (Inches) Deflection Force (Lbs.)

**Cross Section| ****Smallest Sheave Diameter Range| ****R.P.M.**

Range

| Belt Deflection Force
---|---|---|---
Uncogged Hy‐T Belts & Uncogged Hy‐T Torque Team| Cogged Torque‐Flex & Machined Edge torque Team Belts
Used Belt| New Belt| Used Belt| New Belt
A,AX| 3.0 ‐ 3.6| 1000‐2500

2501‐4000

| 3.7

2.8

| 5.5

4.2

| 4.1

3.4

| 6.1

5.0

3.8 ‐ 4.8| 1000‐2500

2501‐4000

| 4.5

3.8

| 6.8

5.7

| 5.0

4.3

| 7.4

6.4

5.0 ‐ 7.0| 1000‐2500

2501‐4000

| 5.4

4.7

| 8.0

7.0

| 5.7

5.1

| 9.4

7.4

**** B, BX| 3.4 ‐ 4.2| 860‐2500

2501‐4000

|  |  | 4.9

4.2

| 7.2

6.2

4.4 ‐ 5.6

| 860‐2500

2501‐4000

| 5.3

4.5

| 7.9

6.7

| 7.1

7.1

| 10.5

9.1

5.8 ‐ 8.6

| 860‐2500

2501‐4000

| 6.3

6.0

| 9.4

8.9

| 8.5

7.3

| 12.6

10.9

C, CX

| ****

7.0 ‐ 9.0

| 500‐1740

1741‐3000

| 11.5

9.4

| 17.0

13.8

| 14.7

11.9

| 21.8

17.5

9.5 ‐ 16.0

| 500‐1740

1741‐3000

| 14.1

12.5

| 21.0

18.5

| 15.9

14.6

| 23.5

21.6

D| 12.0 ‐ 16.0| 200‐850

851‐1500

| 11.5

9.4

| 17.0

13.8

| 14.7

11.9

| 21.8

17.5

**** 18.0 ‐ 20.0| 200‐850

851‐1500

| 30.4

25.6

| 45.2

38.0

|  |
**** 3V,

3VX

| 2.2 ‐ 2.4| 1000‐2500

2501‐4000

|  |  | 3.3

2.9

| 4.9

4.3

2.65 ‐ 3.65| 1000‐2500

2501‐4000

| 3.6

3.0

| 5.1

4.4

| 4.2

3.8

| 6.2

5.6

4.12 ‐ 6.90

| 1000‐2500

2501‐4000

| 4.9

4.4

| 7.3

6.6

| 5.3

4.9

| 7.9

7.3

5V,

5VX

| ****

4.4 ‐ 6.7

| 500‐1749

1750‐3000

3001‐4000

|  |  | 10.2

8.8

5.6

| 15.2

13.2

8.5

7.1 ‐ 10.9| 500‐1740

1741‐3000

| 12.7

11.2

| 18.9

16.7

| 14.8

13.7

| 22.1

20.1

11.8 ‐ 16.0| 500‐1740

1741‐3000

| 15.5

14.6

| 23.4

21.8

| 17.1

16.8

| 25.5

25.0

8V

| ****

12.5 ‐ 17.0

| 200‐850

851‐1500

| 33.0

26.8

| 49.3

39.9

|  |
18.0 ‐ 22.4| 200‐850

851‐1500

| 39.6

35.3

| 59.2

52.7

|  |

Table 2. Sheave Diameter (Millimeters) Deflection Force (KG.)

**Cross Section| ****Smallest Sheave Diameter Range| ****R.P.M.**

Range

| Belt Deflection Forc e
---|---|---|---
Uncogged Hy‐T Belts & Uncogged Hy‐T Torque Team| Cogged Torque‐Flex & Machined Edge torque Team Belts
Used Belt| New Belt| Used Belt| New B elt

A,AX

| ****

75 ‐ 90

| 1000‐2500

2501‐4000

| 1.7

1.3

| 2.5

1.9

| 1.9

1.5

| 2.8

2.3

91 ‐ 120| 1000‐2500

2501‐4000

| 2.0

1.7

| 3.1

2.6

| 2.3

2.0

| 3.4

2.9

125 ‐ 175| 1000‐2500

2501‐4000

| 2.4

2.1

| 3.6

3.2

| 2.6

2.3

| 4.3

3.4

B,BX

| 85 ‐ 105| 860‐2500

2501‐4000

|  |  | 2.2

1.9

| 3.3

2.8

106 ‐ 140

| 860‐2500

2501‐4000

| 2.4

2.0

| 3.6

3.0

| 3.2

3.2

| 4.8

4.1

141 ‐ 220

| 860‐2500

2501‐4000

| 2.9

2.7

| 4.3

4.0

| 3.9

3.3

| 5.7

4.9

C,CX

| ****

175 ‐ 230

| 500‐1740

1741‐3000

| 5.2

4.3

| 7.7

6.3

| 6.7

5.4

| 9.9

7.9

231 ‐ 400

| 500‐1740

1741‐3000

| 6.4

5.7

| 9.5

8.4

| 7.2

6.6

| 10.7

9.8

D

| ****

305 ‐ 400

| 200‐850

851‐1500

| 11.3

9.6

| 16.8

14.2

|  |

401 ‐ 510

| 200‐850

851‐1500

| 13.8

11.6

| 20.5

17.2

|  |

3V,

3VX

| 55 ‐ 60| 1000‐2500

2501‐4000

|  |  | 1.5

1.3

| 2.2

2.0

61 ‐ 90| 1000‐2500

2501‐4000

| 1.6

1.4

| 2.3

2.0

| 1.9

1.7

| 2.8

2.5

91 ‐ 175

| 1000‐2500

2501‐4000

| 2.2

2.0

| 3.3

3.0

| 2.4

2.2

| 3.6

3.3

5V,

5VX

| ****

110 ‐ 170

| 500‐1749

1750‐3000

3001‐4000

|  |  | 4.6

4.0

2.5

| 6.9

6.0

3.9

171 ‐ 1275| 500‐1740

1741‐3000

| 5.8

5.1

| 8.6

7.6

| 6.7

6.2

| 10.0

9.1

276 ‐ 400| 500‐1740

1741‐3000

| 7.0

6.6

| 10.6

9.9

| 7.8

7.6

| 11.6

11.3

8V

| ****

315 ‐ 430

| 200‐850

851‐1500

| 15.0

12.2

| 22.4

18.1

|  |
431 ‐ 570| 200‐850

851‐1500

| 18.0

16.0

| 26.8

23.9

|  |

OPERATION

• Review all SAFETY information in Section A.
• Follow the instructions on all tags, labels and decals attached to the pump.
• This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids. Only the Gorman‐Rupp Company or an authorized Gorman‐Rupp distributor may modify a pump or approve its use for handling volatile, flammable liquids. If the pump is used for handling volatile, flammable liquids, all drivers and/or controls must meet industry standards and codes for use in an explosive atmo­sphere. Do not attempt to pump liquids for which the pump, driver and/or con­trols have not been approved, or which may damage the pump or endanger per­sonnel as a result of pump failure.
• If this pump has been approved for use with volatile and/or flammable liquids, be certain proper safety practices are followed before operating or servicing the pump. Provide adequate ventilation, prohibit smoking, wear static‐resistant clothing and shoes. Clean up all fuel spills immediately after occurrence.

CAUTION

Pump speed and operating condition points must be within the continuous per­formance range shown on the curve (see Section E, Page 1).

PRIMING

• Install the pump and piping as described in IN­STALLATION. Make sure that the piping connec­tions are tight, and that the pump is securely mounted. Check that the pump is properly lubri­cated (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.
2. The pump has not been used for a consider­able length of time.
3. The liquid in the pump casing has evapo­rated.

Once the pump casing has been filled, the pump will prime and reprime as necessary.

• After filling the pump casing, reinstall and tighten the fill plug. Do not attempt to operate the pump unless all connect­ing piping is securely installed. Other­wise, liquid in the pump forced out un­der pressure could cause injury to per­sonnel.
• 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.
• If the pump has been approved for use with petro­leum products, be sure the pump unit is properly grounded before operation. See GROUNDING, Section B.

Rotation

• The correct direction of pump rotation is counter­clockwise 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.

CAUTION

• Only operate this pump in the direction in­dicated by the arrow on the pump body and on the accompanying decal. Other­wise, the impeller could become loosened from the shaft and seriously damage the pump.
• 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, re­move 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 cool­ing 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 lit­erature supplied with the motor for specific instruc­tions.

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 pres­sure 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.

Leakage

• No leakage should be visible at pump mating sur­faces, or at pump connections or fittings. Keep all line connections and fittings tight to maintain maxi­mum pump efficiency.

Liquid Temperature And Overheating

• The maximum liquid temperature for this pump is 160 F (71C). 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 rup­ture 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.

WARNING

• Do not remove plates, covers, gauges, pipe plugs, or fittings from an over­heated pump. Vapor pressure within the pump can cause parts being disen­gaged to be ejected with great force. Al­low 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 in­stalled, 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 neces­sary, liquid pressure must be limited to 50% of the maximum permissible operating pressure shown on the pump performance curve (see Section E, Page 1).

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 oper­ating 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 dis­charge 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.

CAUTION

• 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 re­main inoperative.

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 rotat­ing parts. If the pump will be idle for more than a few hours, or if it has been pumping liquids con­taining a large amount of solids, drain the pump, and flush it thoroughly with clean water. To prevent large solids from clogging the drain port and pre­venting the pump from 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.

BEARING TEMPERATURE CHECK

• Bearings normally run at higher than ambient tem­peratures because of heat generated by friction. Temperatures up to 160F (71C) are considered normal for bearings, and they can operate safely to at least 180F (82C).
• Checking bearing temperatures by hand is inaccu­rate. Bearing temperatures can be measured ac­curately 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 cor­rect level (see LUBRICATION in Section E). Bear­ing 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. Con­tinued operation should bring the temperatures down to normal levels.

TROUBLESHOOTING

Review all SAFETY information in Section A.

WARNING: 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 opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cau­tiously.
7. Drain the pump.

TROUBLE

| ****

POSSIBLE CAUSE

| ****

PROBABLE REMEDY

---|---|---
THE PUMP FAILS TO PRIME| Not enough liquid in casing.

Suction check valve contaminated or damaged.

Air leak in suction line.

Lining of the suction hose collapsed. Leaking or worn seal or pump gasket.

Suction lift or discharge head too high.

Strainer clogged.

| Add liquid to casing. See PRIMING. Clean or replace check valve.

Correct leak.

Replace the suction hose.

Check the pump vacuum. Replace leaking or worn seal or gasket.

Check piping installation and in­ stall bypass line if needed. See INSTALLATION.

Check strainer and clean if neces­ sary.

PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR

PRESSURE

| Air leak in suction line.

Lining of suction hose collapsed. Leaking or worn seal or pump gasket.

| Correct leak.

Replace suction hose.

Check pump vacuum. Replace

 |  | leaking or worn seal or gasket.
 | Strainer clogged.| Check strainer and clean if neces­
 |  | sary.
 | Suction intake not submerged at| Check installation and correct sub­
 | proper level or sump too small.| mergence as needed.

TROUBLE

| ****

POSSIBLE CAUSE

| ****

PROBABLE REMEDY

---|---|---
PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR PRESSURE (cont.)| Impeller or other wearing parts worn or damaged.

Impeller clogged.

| Replace worn or damaged parts. Check that impeller is properly centered and rotates freely.

Free impeller of debris.

 | Pump speed too slow.| Check driver output; check belts or couplings for slippage.
 | Discharge head too high.| Install bypass line.
 | Suction lift too high.| Measure lift w/vacuum gauge. Re­ duce lift and/or friction losses in suction line.
PUMP REQUIRES TOO MUCH POWER| Pump speed too high.| Check driver output; check that sheaves or couplings are cor­ rectly sized.
 | Discharge head too low.| Adjust discharge valve.
 | Liquid solution too thick.| Dilute if possible.
 | Bearing(s) frozen.| Disassemble pump and check
 |  | bearing(s).
PUMP CLOGS| Liquid solution too thick.| Dilute if possible.
FREQUENTLY| Discharge flow too slow.| Open discharge valve fully to in­
 |  | crease flow rate, and run power
 |  | source at maximum governed
 |  | speed.
 | Suction check valve or foot valve| Clean valve.
 | clogged or binding.|
EXCESSIVE NOISE| Cavitation in pump.

**** Pumping entrained air.

**** Pump or drive not securely mounted. Impeller clogged or damaged.

| 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.

BEARINGS RUN TOO HOT| Bearing temperature is high, but within limits.| Check bearing temperature regu­ larly to monitor any increase.
 | Low or incorrect lubricant.| Check for proper type and level of
 |  | lubricant.
 | Suction and discharge lines not| Check piping installation for
 | properly supported.| proper support.
 | Drive misaligned.| 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 pre­ventive maintenance schedule will help assure trouble‐free performance and long life from your Gorman‐Rupp pump. For specific questions con­cerning 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 inspec­tions can indicate problems that can be corrected before system damage or catastrophic failure oc­curs. 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 inspec­tions should be performed at the intervals shown on the chart below. Critical applications should be inspected more frequently.

Preventive Maintenance Schedule

Item

| **Service Interval*
Daily| 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 C I I 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.

PUMP MAINTENANCE AND REPAIR

MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE.

• 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 dif­ference due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
• If your pump serial number is followed by an “N”, your pump is NOT a standard production model.
• Contact the Gorman‐Rupp Company to verify per­formance or part numbers.

CAUTION

Pump speed and operating condition points must be within the continuous per­formance range shown on the curve.

SECTION DRAWING

PARTS LIST

• Pump Model 83A3-B
• (From S/N 734045 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| MAT’L CODE| QTY| ITEM PART NAME NO.| PART NUMBER| MAT’L CODE| QTY
---|---|---|---|---|---|---|---|---
u 1| PUMP CASING| SEE NOTE BELOW|  | 34         WEAR PLATE ASSY

35         HEX NUT

36         LOCK WASHER

u37     PIPE PLUG

38         HEX HD CAP SCREW

39         FIBER WASHER

40         SUCTION FLANGE:

u41     PIPE PLUG

42         FLAP VALVE ASSY

43         -SMALL VALVE WEIGHT

44         -VALVE GASKET

45         -LARGE VALVE WEIGHT

46         -RD HD MACH SCREW

47         -LOCK WASHER

u48     STUD

49         HEX NUT

50         PIPE PLUG

51         IMP ADJ SHIM SET

52         SPRING SEAT

NOT SHOWN:

DRIVE SCREW ROTATION DECAL LUBE DECAL NAMEPLATE SUCTION STICKER PRIMING STICKER

DISCHARGE STICKER

OPTIONAL:

316 SST SEAL STRAINER

METRIC FLANGE KIT

FLANGE KIT

|

6951

D06 J06 P12 B0618

KF06 2946 P04 544A

18

544G

1364

X0403 J04 C0606 D06 P04

2Y

4023

BM*04-03 2613M

38816-079

38818-019

6588AG

6588AH

6588BJ

S1415 26841-026

48213-074

48213-107

|

15990

15991

15991

15079

15991

18040

10010

15079

— 10010

19070

10010

17090

17090

15991

15991

15991

17090

17090

17000

—

— 13990

—

—

—

—

—

—

—

|

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

4

1

1

1

4

1

1

1

1

1

1

1

1

1

1

2| IMPELLER| 6950A| 10010| 1
3| SEAL ASSEMBLY| S298| —| 1
4

u 5

6

7

8

| GASKET STUD HEX NUTS

DISCHARGE ELBOW:

FILL PLUG ASSY

| 543G C0607 D06 543

48271-066

| 19060

15991

15991

10010

—

| 1

4

4

1

1

9| SEAL PLATE| 3529A| 10010| 1
10| SHAFT SLEEVE| 4024| 17020| 1
11| OIL SEAL| 25223-006| —| 1
12

13

14

| BALL BEARING AIR VENT

PEDESTAL

| S390 S1703

3212C

| —

— 10010

| 1

1

1

15| BALL BEARING| S390| —| 1
16

17

18

| BEARING ADJ SHIM SET RETAINING RING

BEARING RETAINER

| S464 S219

38322-517

| —

— 26000

| 1

1

1

19| OIL SEAL| 25223-006| —| 1
20

21

22

| SHAFT KEY

ALLEN HD SET SCREW IMPELLER SHAFT

| N0407 GA*10-01S

38514-209

| 15990

15990

15010

| 1

2

1

23

24

25

26

27

28

29

| O‐RING PIPE PLUG SIGHT GAGE PIPE PLUG

SLINGER RING STUD

HEX NUTS

| 25152-149

P06

26714-006

P06 2351 C0607 D06

| — 15079

— 15079

19120

15991

15991

| 1

1

1

1

1

6

6

30

31

32

33

| GASKET SET

HEX HD CAP SCREW WASHER

T‐TYPE LOCK WASHER

| 48211-089

B0604 3118 AK06

| — 15991

15990

15991

| 1

1

1

1

INDICATES PARTS RECOMMENDED FOR STOCK

INCLUDED WITH REPAIR PUMP CASING ASSY: 46472-332

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY

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 be­comes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional view (see Figure 1) and the accompa­nying parts lists.
• This manual will alert personnel to known proce­dures 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 per­sonnel to ensure that only safe, established main­tenance procedures are used, and that any proce­dures not addressed in this manual are performed only after establishing that neither personal safety nor pump integrity are compromised by such prac­tices.
• Before attempting to service the pump, lock out or disconnect the power source 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.

CAUTION

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 opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cau­tiously.
7. Drain the pump.

• If this pump has been approved for use with volatile and/or flammable liquids, be certain proper safety practices are followed before operating or servicing the pump. Provide adequate ventilation, prohibit smoking, and wear static‐resistant clothing and shoes. Clean up all fuel spills immediately after the occurrence.
• Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries to personnel or dam­age to equipment. Suction and dis­charge hoses and piping must be re­moved from the pump before lifting.
• Use Only Genuine Gorman-Rupp re­placement parts. Failure to do so may cre­ate a hazard and damage the pump or di­minish optimal pump performance. Any such hazard, damage or diminished per­formance is not covered by the warranty.
• NOTE
• When appropriate recycling facilities are available, the user should recycle components and fluids when doing any routine maintenance/repairs and also at the end of the pump’s useful life. All other components and fluids shall be disposed of ac­cording to all applicable codes and regulations.

Suction Check Valve Disassembly

• Before attempting to service the pump, remove the pump casing drain plug (37) and drain the pump. Clean and reinstall the drain plug.
• To service the suction check valve, remove the suc­tion piping. Remove the nuts (49) securing the suc­tion flange (40) and the check valve assembly (42) to the pump casing
• Pull the check valve assem­bly from the suction port.
• Inspect the check valve parts for wear or damage. If replacement is required, remove the hardware (46 and 47) and separate the valve gasket (44) and weights (43 and 45).
• If no further disassembly is required, see Suction Check Valve Installation.

Pump Casing Removal

• To service the impeller (2), wear plate assembly (34) and seal assembly (3), disconnect the dis­charge piping. Remove the hardware securing the pump casing (1) to the base.
  Remove the nuts (29) securing the pump casing and gasket set (30) to the pedestal (14) and seal plate (9). Install a standard 5/8-11 UNC lifting eye in the tapped hole in the top of the pump casing. Be sure to screw the eye into the casing until fully engaged. Use a hoist and sling of suitable capacity to separate the casing from the seal plate and ped­estal.

WARNING

• Do not attempt to lift the complete pump unit using the lifting eye. It is designed to facilitate removal or installation of in­dividual components only. Additional weight may result in damage to the pump or failure of the eye bolt.
• Remove the gasket set (30) from the pedestal and seal plate. Tie and tag the gaskets, or measure and record their thickness for ease of reassembly. Tie and tag any leveling shims used under the casing mounting feet to ease reassembly.
• Inspect the wear plate assembly (34) and replace it if badly scored or worn. To remove the wear plate assembly, remove the capscrew (38) and fiber washer (39) just below the suction port. Reach through the suction port and disengage the hard­ ware (35 and 36) from the wear plate stud. Tap the wear plate assembly free of the casing.

Impeller Removal

• Immobilize the impeller by wedging a block wood between the vanes. Remove the hardware (31, 32 and 33) securing the impeller to the shaft. If re­moved, install the shaft key (20). Install a lathe dog on the drive end of the shaft (22) with the “V” notch positioned over the shaft keyway.
• With the impeller rotation still blocked, strike the lathe dog sharply in a counterclockwise direction (when facing the drive end of the shaft). The impel­ler 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.
• Unscrew the impeller from the shaft. Use caution when removing the impeller; tension on the seal spring will be released as the impeller is un­screwed.
• Inspect the impeller and replace it if cracked or badly worn. Slide the impeller adjusting shims (51) off the impeller shaft. Tie and tag the shims, or measure and record their thickness for ease of reassembly.

Seal Removal (Figures 1 and 3)

• Remove the spring seat (52) and seal spring. Care­fully slide the shaft sleeve (10) and rotating portion of the seal off the shaft (22) as a unit. Apply oil to the sleeve and work it up under the rubber bellows. Slide the rotating portion of the seal off the sleeve.
• Carefully slide the seal plate and stationary portion of the seal off the shaft as a unit. Lay the seal plate on a clean, flat surface with the impeller side down and use a suitably sized dowel to press the station­ary element and seat out of the seal plate from the back side.
• If no further disassembly is required, see Seal Reassembly and Installation.

Shaft And Bearing Removal And Disassembly

• When the pump is properly operated and main­tained, the pedestal should not require disassem­bly. Disassemble the shaft and bearings only when there is evidence of wear or damage.

CAUTION

• 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 pedestal drain plug (26) and drain the pedestal. Clean and reinstall the plug.
• Remove the slinger ring (27) from the shaft. Re­move the pedestal mounting hardware from the base. Tie and tag any shims used under the mounting feet for leveling.
• Use snap ring pliers to remove the bearing retain­ing ring (17) from the pedestal bore. Remove the bearing shim set (16); tie and tag the shims, or measure and record their thickness for ease of reassembly.
• Remove the setscrews (21) from the bearing re­tainer (18) and install two machine screws (#10-32 x 1-inch long, not supplied). Pry the re­tainer from the pedestal bore using a pair of screw­drivers against the heads of the machine screws. Do not use the machine screws to jack against the ball bearing. Remove the machine screws and re­install the setscrews.
• Press the oil seal (19) from the bearing retainer, and remove the O‐ring (23) from the pedestal bore.
• Place a block of wood against the impeller end of the shaft and tap the shaft and assembled bear­ings (12 and 15) out of the pedestal.
• Press the oil seal (11) from the pedestal bore.
• After removing the shaft and bearings, clean and inspect the bearings in place as follows.
• 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 bear­ings 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 dam­age and replace as necessary.
• Most cleaning solvents are toxic and flammable. Use them only in a well‐ven­tilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent contain­ers.
• Inspect the shaft for distortion, nicks or scratches, or thread damage on the impeller end. Dress small nicks and burrs with a fine file or emery cloth. Re­place the shaft if defective.
• Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil.
• Bearings must be kept free of all dirt and foreign material. Failure to do so will great­ly shorten bearing life. Do not spin dry bearings. This may scratch the balls or races and cause premature bearing fail­ure.
• Rotate the bearings by hand to check for rough­ness or binding and inspect the bearing balls. If ro­tation 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 inboard and outboard bear­ings from the impeller shaft.

Shaft And Bearing Reassembly And Installation

• Clean and inspect the bearings as indicated in Shaft and Bearing Removal and Disassembly.
• 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 and bearings are removed.
• The bearings may be heated to ease installation. An induction heater, hot oil bath, electric oven, or hot plate may be used to heat the bearings. Bear­ings 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 thor­oughly filtered.
• Heat the bearings to a uniform temperature no higher than 250F (120C), 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.

Use caution when handling hot bear­ings to prevent burns.

• After the bearings have been installed and allowed to cool, check to ensure that they have not moved out of position in shrinking. If movement has oc­curred, use a suitably sized sleeve and a press to reposition the bearings.
• If heating the bearings is not practical, use a suit­ably 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. Slide the shaft and assembled bearings into the pedestal until the inboard bearing is fully seated against the bore shoulder.
• When installing the shaft and bearings into the bearing bore, push against the outer race. Never hit the balls or ball cage.
• Position the oil seal (11) in the pedestal bore with the lip positioned as shown in Figure 1. Press the oil seal into the bore until fully seated.
• Position the oil seal (19) in the bearing retainer (18) with the lip positioned as shown in Figure 1. Press the oil seal into the retainer until fully seated.
• Replace the bearing retainer O‐ring (23) in the ped­estal, and lubricate it with grease. Press the bear­ing retainer into the pedestal until it seats against the bearing. Be careful not to cut the oil seal lip on the shaft keyway. Be sure the setscrews (21) in the bearing retainer are positioned horizontally inline.
• Install the same thickness of bearing adjusting shims (16) as previously removed. Reinstall the re­taining ring (17) and check shaft endplay.

NOTE

• Shaft endplay should be .002 to .005 inch (0,05 to 0,12 mm). Add or remove bearing adjusting shims to obtain this endplay.
• Install the slinger ring (27) and shaft key (20). Install any leveling shims used under the pedestal feet.

Seal Reassembly and Installation (Figures 1 and 3)

• Clean the seal cavity and shaft with a cloth soaked in fresh cleaning solvent.

WARNING

• Most cleaning solvents are toxic and flammable. Use them only in a well‐ven­tilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent contain­ers.

• The seal is not normally reused because wear pat­terns on the finished faces cannot be realigned during reassembly. This could result in premature failure. If necessary to reuse an old seal in an emer­gency, 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 leak­age. Clean and polish the shaft sleeve, or replace 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. Discard the spring centering washer in­cluded with the seal. It is not used in this applica­trion.

• To ease installation of the seal, lubricate the bel­lows, sleeve and stationary seat O‐ring with water or a very small amount of light lubricating oil, and apply a drop of light lubricating oil on the finished faces. Assemble the seal as follows (see Figure 3).

• This seal is not designed for operation at temperatures above 160F (71C). Do not use at higher operating temperatures.
  If the seal plate (9) was removed, lay it on a flat sur­face with the impeller side facing up. Subassemble the stationary element into the stationary seat and press this subassembly into the seal plate bore un­til fully seated.

• Slide the assembled seal plate and stationary por­tion of the seal over the shaft (22) and temporarily secure the seal plate to the pedestal (14) using two capscrews and nuts (1/2 UNC X 1 1/2 inch long, not supplied).

• Subassemble the rotating element into the retainer and bellows, then slide this subassembly onto the shaft sleeve (10) until the face of the rotating ele­ment is just flush with the chamfered end of the sleeve.

• Slide the assembled seal and shaft sleeve onto the shaft until the seal faces contact. Continue to push the sleeve through the seal until the chamfered end seats firmly against the shaft shoulder.

• Install the seal spring and spring seat (52).

Impeller Installation and Adjustment

• Inspect the impeller, and replace it if cracked or badly worn. Install the same thickness of impeller shims (51) as previously removed, and screw the impeller onto the shaft until tight.
• A clearance of .010 to .020 inch (0,25 to 0,51 mm) between the impeller and the seal plate is neces­sary 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.
• After the back clearance is set, secure the impeller with the hardware (31, 32 and 33).

Pump Casing Installation

• If the wear plate assembly (34) was removed, posi­tion the replacement wear plate assembly squarely against the casing shoulder and secure it with the mounting hardware (35, 36, 38 and 39). Replace the fiber washer (39) if badly worn or compressed.
• Remove the hardware temporarily securing the seal plate to the pedestal. Install the same thick­ness of pump casing gaskets (30) as previously re­moved. Secure the pump casing (1) to the seal plate and pedestal with the nuts (29).
• A clearance of .008 to .015 inch (0,20 to 0,38 mm) between the impeller and the wear plate is also rec­ommended for maximum pump efficiency. Set this clearance by adding or removing gaskets in the pump casing gasket set (30) until the impeller scrapes against the wear plate when the shaft is turned by hand. After the impeller scrapes, add ap­proximately .008 inch (0,20 mm) of gaskets.
• Secure the pump casing to the base with the pre­viously removed hardware. Be sure to reinstall any leveling shims used under the mounting feet of the pump casing.
• If a lifting eye was used to move the pump casing, be sure to remove the lifting eye from the pump casing.
• Do not attempt to lift the complete pump unit using the lifting eye. It is designed to facilitate removal or installation of in­dividual components only. Additional weight may result in damage to the pump or failure of the eye bolt.

Suction Check Valve Installation

• Inspect components of the check valve assembly (42) and replace as required. If separated at disas­sembly, assemble the check valve weights (43 and 45) to the check valve gasket (44) with the hard­ware (46 and 47).
• Position the check valve assembly in the suction port with the large weight (45) facing toward the in­side of the pump casing. Install the suction flange (40) and secure with the nuts (49). Check the oper­ation of the check valve to ensure proper seating and free movement.

Final Pump Assembly

• Be sure the pump and power source are securely mounted to the base. Reconnect the power source to the pump.
• Install the suction and discharge lines and open all valves. Make certain that all piping connections are tight, properly supported and secure.
• If a lifting eye was used to move the pump casing, be sure to remove the lifting eye from the pump casing.
• Be sure the pump and power source have been properly lubricated, see LUBRICATION.
• Fill the pump casing with clean liquid. Reinstall the fill plug (8) and tighten it.
• Refer to OPERATION, Section C, before putting the pump back into service.

LUBRICATION

Seal Assembly

• The seal assembly is lubricated by the medium be­ing pumped, and no additional lubrication is re­quired.

Bearings

• The pedestal was fully lubricated when shipped from the factory. Check the oil level regularly through the sight gauge (25) and maintain it at the middle of the gauge. When lubrication is required, add SAE No. 30 non‐detergent oil through the hole for the air vent (13). Do not over‐lubricate. Over‐lu­brication can cause the bearings to over‐heat, re­sulting in premature bearing failure.

NOTE
The white reflector in the sight gauge must be posi­tioned horizontally to provide proper drainage.
Under normal conditions, change the oil each 5000 hours or once each year, more frequently if the pump is operated continuously or installed in an environment with rapid temperature change.

CAUTION
Monitor the condition of the bearing lubri­ cant regularly for evidence of rust or mois­ture condensation. This is especially im­portant 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 repre­sentative.

• For Warranty Information, Please Visitwww.grpumps.com/warranty
• or call:
• U.S.: 419-755-1280
• Canada: 519-631-2870 International: +1-419-755-1352
• THE GORMAN‐RUPP COMPANY IN MANSFIELD, OHIO
• www.grpumps.com
• GORMAN‐RUPP OF CANADA LIMITED. THOMAS, ONTARIO, CANADA Printed in the U.S.A.
• Copyright by the Gorman‐Rupp Company
• Register your new
• Gorman‐Rupp pump online at
• www.grpumps.com
• Valid serial number and e‐mail address required

Documents / Resources

| GORMAN-RUPP 83A3-B Series Vacuum Pump [pdf] User Manual
83A3-B, 83A3-B Series Vacuum Pump, Vacuum Pump, Pump
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