PA SERIES PUMPS
MR−05861
MAINTENANCE & REPAIR
PAGE C − 12
Separating Intermediate And Drive Assembly
From Engine
(Figure C−3)
If it is necessary to separate the intermediate and
drive assemblies from the engine, support the in-
termediate using a hoist and sling, and remove the
hardware (6 and 7) securing the intermediate to
the engine bellhousing. Remove the intermediate
guards (48 and 49, Figure C−2), and separate the
assemblies by pulling the intermediate straight
away from the engine.
As the assemblies separate, the flexible portion of
the coupling assembly (3) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (19, Figure C−2).
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.
Shaft and Bearing Removal and Disassembly
(Figure C−2)
When the pump is properly operated and main-
tained, the intermediate should not require disas-
sembly. 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-e-
quipped shop by qualified personnel.
Remove the intermediate drain plug (22) and drain
the lubricant. Clean and reinstall the drain plug.
Disengage the hardware (16 and 17) and remove
the bearing cap (15), gasket (14), bearing cap oil
seal (18), and thrust washer (13). Press the oil seal
from the bearing cap.
Place a block of wood against the impeller end of
the shaft (20) and tap the shaft and assembled
bearings from the intermediate. Press the inboard
oil seal (9) from the intermediate.
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 intermediate, shaft and all component
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.
