Gorman-Rupp Pumps PAH3B60-4045H 1493144 and up - Manual (Page 43)

PAH SERIES OM-06474
MAINTENANCE & REPAIR PAGE E - 20
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (28, Figure 6).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou­
pling must be replaced. To remove the ring, disen­
gage the hardware (4 and 5) securing it to the fly­
wheel.
Move the pump end to a clean, well equipped shop
area for further disassembly.
Shaft and Bearing Removal and Disassembly
(Figure 6)
When the pump is properly operated and main­
tained, the pedestal (18) should not require disas­
sembly. 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 (15A) and drain
the lubricant. Clean and reinstall the drain plug. For
shorter drain time, remove the air vent (12A). Clean
and reinstall the drain plug and air vent after drain­
ing.
If not removed with the seal assembly, remove the
hardware (16 and 17) and separate the seal plate
and gasket from the pedestal.
Disengage the hardware (16A and 17A) and re­
move the drive flange (20), gasket (21) and oil seal
(19). Press the oil seal from the drive flange.
Place a block of wood against the impeller end of
the shaft (25) and tap the shaft and assembled
bearings (24 and 27) from the pedestal.
Press the oil seals (13) from 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 rollers and
balls. If rotation is rough or the rollers or 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, straighten the
tab on the bearing lock washer (23). Use a spanner
wrench to remove the bearing lock nut (22). Re­
move the bearing lock washer.