OM-06575
PA SERIES
MAINTENANCE & REPAIR
PAGE E - 13
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
Before disassembling the pedestal, remove the
pedestal drain plug (21) and drain the oil from the
pedestal. Clean and reinstall the pipe plug.
Disengage the capscrews (22) and and remove
the outboard bearing cap (24), O‐ring (25) and oil
seal (23). Remove the bearing shims (26). Press
the oil seal from the bearing cap.
Straighten the tab on the washer (28) securing the
bearing lock nut (27). Use a spanner wrench to re
move the lock nut. Remove the tab washer.
Disengage the capscrews (22) and remove the in
board bearing cap (35) and oil seal (23). Remove
the bearing cap gasket (29) and clean the mating
surfaces. Press the oil seal from the bearing cap.
Place a block of wood against the impeller end of
the shaft (32) and tap the shaft and assembled
bearings (30 and 34) out of the pedestal.
After removing the shaft and bearings, clean and
inspect the bearings
in place
as described in
Bearing Cleaning And Inspection
.
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, remove the re
taining ring (55) and use a bearing puller to remove
the inboard and outboard bearings from the shaft.
Bearing Cleaning And Inspection
(Figure 3)
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. Inspect the bearing balls (or roll
ers) on open‐type bearings. If rotation is rough or
the balls or rollers are discolored, replace the bear
ings.
Shaft and Bearing Reassembly and Installation
(Figure 3)
Inspect the impeller shaft (32) for distortion, nicks
or scratches, or damaged keyways. Dress small
nicks and burrs with a fine file or emery cloth. Re
place the shaft if defective.
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.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear
ings should
never
be heated with a direct flame or
directly on a hot plate.
