Gorman-Rupp Pumps PAH4B60-QSB4.5P 1526774 and up - Manual (Page 42)

PAH SERIES OM-06609
MAINTENANCE & REPAIR PAGE E - 20
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 bearing housing should not require dis­
assembly. 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 bearing housing drain plug (19) and
drain the lubricant. Clean and reinstall the drain
plug.
If not removed with the seal assembly, remove the
hardware (15 and 16) and separate the seal plate
and gasket (14) from the pedestal (18).
Disengage the hardware (15 and 16) and remove
the drive flange (21), gasket (17) and oil seal (20).
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 bearing housing.
Press the oil seals (12) from the bearing housing.
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 bearing housing, shaft and all compo­
nent 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 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 bearing
housing. Replace the bearings, shaft, or bearing
housing 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. Remove
the bearing lock washer.
Use a bearing puller to remove the inboard and
outboard bearings from the shaft.