MR--04835
PA SERIES PUMPS
MAINTENANCE & REPAIR
PAGE C -- 11
pling must be replaced. To remove the ring, disen-
gage the hardware (15 and 16) securing it to the fly-
wheel.
Inspect the pilot bushing (21) and, if replacement is
required, use a suitable puller to remove it from the
engine flywheel.
Shaft And Bearing Removal And Disassembly
(Figure C--2)
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 (23 and 24) se-
curing the oil chamber plate (26) to the intermedi-
ate. Place a block of wood against the impeller end
of the shaft, and tap the shaft (20), bearing (30),
bearing retainer (28) and oil chamber plate out of
the drive end of the intermediate.
Be careful
not to
damage the shaft.
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.
Remove the oil chamber plate, gasket (22) and
bearing retainer. Remove the O-ring (27) and, if
necessary, the retaining ring (25) from the oil
chamber plate.
Press the oil seals (33) 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 rollers. If rota-
tion is rough or the rollers 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 ring (29)
from the shaft. Use an arbor (or hydraulic) press to
remove the bearing from the shaft.
