Gorman-Rupp Pumps PA6B60-6068H 1421583 and up - Manual (Page 37)

OM−06250 PA SERIES
MAINTENANCE & REPAIR PAGE E − 15
Shaft And Bearing Removal And Disassembly
(Figure 4)
When the pump is properly operated and main-
tained, the shaft and bearing should not require
disassembly. Disassemble the shaft and bearing
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.
After removing the drive components from the im-
peller shaft, remove the hardware (25 and 47) se-
curing the oil chamber plate (26) to the intermedi-
ate. Install three 3/8−16 UNC x 1−1/2-inch long
jacking screws (not supplied) in the tapped holes
in the plate. Turn the screws evenly in an alternat-
ing sequence until the plate comes free of the inter-
mediate. Remove the jacking screws.
Remove the gasket (28). Remove the O-ring (27)
and, if replacement is necessary, the retaining ring
(16) from the oil chamber plate.
NOTE
There are no provisions for draining the grease
from the intermediate cavity. Place a drip pan under
the intermediate before removing the shaft and
bearing.
Place a block of wood against the impeller end of
the shaft and tap the shaft (20), bearing (12), bear-
ing retainer (17) and bearing adjusting shims (29)
out of the drive end of the intermediate. Be careful
not to damage the shaft. Remove the retainer.
Press the oil seals (30) from the intermediate bore.
After removing the shaft and bearing, clean and in-
spect the bearing in place as follows.
To prevent damage during removal from
the shaft, it is recommended that the bear-
ing be cleaned and inspected in place. It
is strongly recommended that the bearing
be replaced any time the shaft and bearing
are removed.
Clean the intermediate, shaft and all component
parts (except the bearing) 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 bearing thoroughly in fresh cleaning sol-
vent. Dry the bearing 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 bearing by hand to check for roughness
or binding and inspect the bearing balls. If rotation
is rough or the balls are discolored, replace the
bearing.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the intermedi-
ate. Replace the bearing, shaft, or intermediate if
the proper bearing fit is not achieved.
If bearing replacement is required, use snap ring
pliers to remove the bearing retaining rings (15)