Gorman-Rupp Pumps 16A20-B 818301 and up - Manual (Page 29)

10 SERIES OM‐00710
MAINTENANCE & REPAIR PAGE E - 6
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‐
equipped shop by qualified personnel.
Remove the pedestal drain plug (51) and drain the
pedestal. Clean and reinstall the plug.
Remove the slinger ring (54) 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 (41) from the pedestal bore. Remove the
bearing shim set (48); tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Loosen the machine screws (45) and pry the bear­
ing retainer (47) 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.
Press the oil seal (44) from the bearing retainer and
remove the O‐ring (40) from the pedestal bore.
Disengage the hardware (27 and 28) and remove
the the assembled bearing cap (29) and oil seal
(35). Press the oil seal out of the bearing cap.
Place a block of wood against the drive end of the
shaft and tap the shaft and assembled bearings
(34 and 39) out of the pedestal.
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.
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.
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.
If bearing replacement is required, use a bearing
puller or arbor (or hydraulic) press to remove the
bearings from the shaft.