MR--04836
PA SERIES PUMPS
MAINTENANCE & REPAIR
PAGE C -- 13
the intermediate bore until the bearing seats
squarely against the bore shoulder.
If removed, install the retaining ring (16) in the
groove in the oil chamber plate (28). Install a new
O-ring (29) in the groove in the oil chamber plate
and lubricate it with light oil.
Install the same thickness of bearing adjusting
shims (31) as previously removed. Pack the bear-
ing retainer (21) approximately 1/2 full with No. 0
lithium base grease and position it against the
bearing. Install a new gasket (30) and position the
oil chamber plate in the intermediate with the
chamfered edge
toward
the bearing. Press the oil
chamber plate into the intermediate until the retain-
ing ring (16) is fully seated against the bearing. Se-
cure the oil chamber plate to the intermediate with
the hardware (26 and 27).
Check the shaft endplay. Shaft endplay should be
between .002 and .010 inch (0,05 and 0,25 mm).
Add or remove shims from the bearing adjusting
shim set until the correct endplay is achieved.
When installing the shaft and bearing into
the bearing bore, push against the outer
race.
Never
hit the balls or ball cage.
Position the intermediate with the impeller end up.
Lubricate the lips of the oil seals (32) and press
them, one at a time, into the intermediate bore with
the lips positioned as shown in Figure C---2.
Lubricate the bearing cavity as indicated in
LUBRI-
CATION
at the end of this section.
Securing Intermediate And Drive Assembly To
Engine
(Figure C--3)
Install the shaft key (19) in the shaft keyway. Posi-
tion the metal hub portion of the coupling assembly
(18) onto the shaft to the dimension shown in Fig-
ure C-2 and secure it by torquing the setscrew to
65 ft. lbs. (780 in. lbs or 9 m. kg.).
Make certain that the metal hub portion of
the coupling is mounted as shown in Fig-
ure C---2.
This is critical.
If the coupling is
not properly positioned on the shaft, the
coupling parts will not fully engage.
If removed, apply ’Never-Seez’ or equivalent com-
pound to the I.D. of the pilot bushing (21) and press
it into the engine flywheel until fully seated.
If the complete coupling assembly is being re-
placed, apply ’Loctite Threadlocker No. 242’ or
equivalent compound to the threads of the hare-
dware (22 and 23) and secure the elastic element
portion of the coupling to the engine flywheel by
torquing the hardware to 50 ft. lbs. (600 in. lbs. or
6,9 m. kg.).
Using a suitable lifting device and sling, position
the assembled coupling, intermediate, shaft and
bearings so the metal hub portion of the coupling
seats inside the elastic element portion attached to
the engine flywheel.
Secure the intermediate to the engine bellhousing
with the previously removed hardware (24 and 25).
Pump Casing Installation
(Figure C--2)
If the balance ring (38) was removed, press the re-
placement ring into the casing until it seats square-
ly against the casing shoulder.
The balance ring
must
seat squarely in the
suction head; otherwise binding and/or ex-
cessive wear will result.
NOTE
The stationary seat and O-ring for the shaft seal as-
sembly may be installed in the pump casing before
the casing is secured to the intermediate (see
Seal
Reassembly and Installation
). If the stationary
seat is installed,
be careful
not to damage it on the
shaft threads.
