OM-07186
PAH SERIES
MAINTENANCE & REPAIR
PAGE E - 19
Remove any leveling shims used under the casing
mounting feet. Tie and tag the shims for ease of
reassembly.
Move the pedestal to a clean, well equipped shop
area for further disassembly.
Shaft And Bearing Removal And Disassembly
(Figure 5)
When the pump is properly operated and main
tained, the shaft and bearings should not require
disassembly. 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.
NOTE
There are no provisions for draining the lubricant
from the pedestal. Place a drip pan under the ped
estal before disassembly.
If not removed with the seal assembly, remove the
hardware (16 and 17) and separate the seal plate
and O‐ring (15) from the pedestal (18).
Disengage the hardware (16 and 17) and remove
the drive flange (23), gasket (25) and oil seal (24).
Press the oil seal from the drive flange.
Place a block of wood against the impeller end of
the shaft (31) and tap the shaft and assembled
bearings (28 and 33) from the bearing housing.
Press the oil seals (19) 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 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 balls. If ro
tation is rough or the 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 (27). Use a spanner
wrench to remove the bearing lock nut (26). Re
move the bearing lock washer.
Use a bearing puller to remove the inboard and
outboard bearings from the shaft.
