GORMAN-RUPP 83B3-B Installation, Operation And Maintenance Manual Download Page 28

80 SERIES

OM−0877

MAINTENANCE & REPAIR

PAGE E − 6

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.

Shaft and bearing disassembly in the field
is not recommended. these operations
should be performed only in a properly-e-
quipped shop by qualified personnel.

Remove the pedestal drain plug (31) and drain the
pedestal. Clean and reinstall the plug.

Remove the slinger ring (15) from the shaft. Re-
move 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 retain-
ing ring (22) from the pedestal bore. Remove the
bearing shim set (27); tie and tag the shims, or
measure and record their thickness for ease of
reassembly.

Remove the setscrews (24) from the bearing re-
tainer (28) and install two machine screws
(#10−32 X 1−inch long, not supplied). Pry the re-
tainer from the pedestal bore using a pair of screw-
drivers against the heads of the machine screws.

Do not

 use the machine screws to jack against the

ball bearing. Remove the machine screws and re-
install the setscrews.

Press the oil seal (23) from the bearing retainer,
and remove the O-ring (21) from the pedestal bore.

Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear-
ings (16 and 20) out of the pedestal.

Press the oil seal (15)  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 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.

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

Inspect the shaft for distortion, nicks or scratches,
or thread damage on the impeller end. Dress small
nicks and burrs with a fine file or emery cloth. Re-
place 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 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.

Summary of Contents for 83B3-B

Page 1: ...GORMAN RUPP COMPANY D MANSFIELD OHIO www grpumps com GORMAN RUPP OF CANADA LIMITED D ST THOMAS ONTARIO CANADA Printed in U S A eCopyright by the Gorman Rupp Company INSTALLATION OPERATION AND MAINTENA...

Page 2: ...rial 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 in...

Page 3: ...Suction Line Positioning PAGE B 3 DISCHARGE LINES PAGE B 4 Siphoning PAGE B 4 Valves PAGE B 4 Bypass Lines PAGE B 4 ALIGNMENT PAGE B 4 Coupled Drives PAGE B 5 V Belt Drives PAGE B 5 OPERATION SECTION...

Page 4: ...AGE E 5 Seal Removal PAGE E 5 Shaft And Bearing Removal And Disassembly PAGE E 5 Shaft And Bearing Reassembly And Installation PAGE E 6 Seal Reassembly and Installation PAGE E 7 Impeller Installation...

Page 5: ...operator safety nor pump integrity are com promised by the installation Pumps and related equipment must be installed and operated ac cording to all national local and industry stan dards If there are...

Page 6: ...ool 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 design...

Page 7: ...rts Exposed rotating parts can catch clothing fingers or tools causing severe injury to person nel Do not operate the pump against a closed discharge valve for long periods of time If operated against...

Page 8: ...nce 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 For further assistance contact yo...

Page 9: ...suction and discharge hoses or piping before attempting to lift existing installed units The pump assembly can be seriously damaged if the cables or chains used to lift and move the unit are improper...

Page 10: ...ion 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 13 16 inch 20 6 mm diameter...

Page 11: ...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 If the a...

Page 12: ...ump casing feet and or pedestal feet and the driver mounting bolts should also be tightly secured When checking alignment disconnect the power source to ensure that the pump will remain inoperative Ad...

Page 13: ...ts 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 hour...

Page 14: ...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 p...

Page 15: ...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 9 200 850 851 1500 39 6 35 3 59 2 52 7 18 0 22 4 Table 2 Sheave Diameter Millimeters Deflect...

Page 16: ...ust 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 tig...

Page 17: ...ill 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...

Page 18: ...e 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 checki...

Page 19: ...s 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 als...

Page 20: ...e Air leak in suction line Lining of suction hose collapsed Correct leak Replace suction hose Leaking or worn seal or pump gasket Check pump vacuum Replace leaking or worn seal or gasket Suction lift...

Page 21: ...ng s frozen Disassemble pump and check bearing s Liquid solution too thick Dilute if possible Discharge flow too slow Open discharge valve fully to in crease flow rate and run power source at maximum...

Page 22: ...ly 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...

Page 23: ...with minimum suction lift Since pump installations are seldom identical your performance may be dif ference due to such factors as viscosity specific gravity elevation temperature and impeller trim If...

Page 24: ...80 SERIES OM 00877 MAINTENANCE REPAIR PAGE E 2 PARTSPAGE SECTION DRAWING Figure 1 Pump Model 83B3 B...

Page 25: ...5 SHAFT KEY N0407 15990 1 26 IMPELLER SHAFT 38514 549 15010 1 27 BEARING SHIM SET 48261 009 1 28 BEARING RETAINER 38322 521 26000 1 29 SIGHT GAUGE 26714 011 1 30 PIPE PLUG P06 15079 1 31 PEDESTAL DRAI...

Page 26: ...ontact your local power source representative 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 w...

Page 27: ...the shaft If removed install the shaft key 25 Install a lathe dog on the drive end of the shaft 26 with the V notch positioned over the shaft keyway With the impeller rotation still blocked strike the...

Page 28: ...the impeller end of the shaft and tap the shaft and assembled bear ings 16 and 20 out of the pedestal Press the oil seal 15 from the pedestal bore After removing the shaft and bearings clean and inspe...

Page 29: ...ved 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...

Page 30: ...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 c...

Page 31: ...as previously removed and screw the impeller onto the shaft until tight A clearance of 015 to 020 inch 0 38 to 0 51 mm between the impeller and the seal plate is neces sary for maximum pump efficienc...

Page 32: ...plug Refer to OPERATION Section C before putting the pump back into service LUBRICATION Seal Assembly The seal assembly is lubricated by the medium be ing pumped and no additional lubrication is re q...

Page 33: ...rpumps com warranty or call U S 419 755 1280 International 1 419 755 1352 For Canadian Warranty Information Please Visit www grcanada com warranty or call 519 631 2870 THE GORMAN RUPP COMPANY D MANSFI...

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