Gorman-Rupp Pumps 112G60-B 1214462 and up - Manual (Page 29)

10 SERIES OM−05174
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 bottle oiler and nipple (51 and 52) and
drain the lubricant from the pedestal by removing
the pedestal drain plug (58). Clean and reinstall the
plug.
Remove the hardware (34 and 35) securing the
bearing housing (33) to the pedestal (62). Remove
the bearing shim set (56); tie and tag the shims or
measure and record their thickness for ease of
reassembly.
Remove the slinger ring (29) from the impeller
shaft (50).
Place a block of wood against the impeller end of
the shaft (50) and tap the shaft, assembled bear-
ings (30 and 32) and bearing housing from the
pedestal bore. Be careful not to damage the shaft.
Remove the bearing housing O-ring (57) from the
bearing housing.
Disengage the hardware (36 and 37) and separate
the bearing housing cup (38) and gasket (55) from
the bearing housing.
Inspect the oil seal (45) and, if replacement is re-
quired, press it from the bearing cap.
Apply heat to the outside of the bearing housing
(33) and press the heated bearing housing off the
outboard bearings (32) and remove it from the
shaft.
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, bend the tab of
the lockwasher (54) away from the locknut (53) and
unscrew the locknut from the shaft. Remove the