PA SERIES PUMPS
MR−05861
MAINTENANCE & REPAIR
PAGE C − 14
When installing the bearings onto the
shaft,
never
press or hit against the outer
race, balls, or ball cage. Press
only
on the
inner race.
Slide the shaft (20) and assembled bearings (10
and 12) into the intermediate bore until the inboard
bearing is fully seated against the bore shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race.
Never
hit the balls or ball cage.
Apply a light coating of oil to the lip of the inboard oil
seal (9) and press it into the intermediate bore with
the lip positioned as shown in Figure C−2. Press
the oil seal into the housing until the face is
just
flush
with the machined surface on the housing.
Apply a light coating of oil to the lip of the outboard
oil seal (18) and press it into the bearing cap (15)
with the lip positioned as shown in Figure C−2.
The face of the oil seal should be just flush with the
outer face of the bearing cap.
Install the thrust washer (13) and bearing cap gas-
ket (14), and secure the bearing cap to the interme-
diate with the hardware (16 and 17).
Be careful
not
to damage the lip of the oil seal (18) on the shaft
keyway.
Lubricate the bearings as indicated in
LUBRICA-
TION
at the end of this section.
Securing Intermediate And Drive Assembly To
Engine
(Figure C−3)
Install the shaft key (19, Figure C−2) in the shaft
keyway. Position the flexible portion of the coupling
assembly (3) on the shaft as shown in Figure C−3.
NOTE
The flexible portion of the coupling must be proper-
ly positioned on the shaft. The heads of the caps-
crews in the center of the coupling
must be posi-
tioned toward the pump end of the shaft
.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft until it is
just flush
with the end of the shaft. Rotate the flexible portion
of the coupling until the tapped holes for the two
setscrews align with those in the bushing, and in-
stall the setscrews.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure
C−3.
This is critical.
If the coupling is not
properly positioned on the shaft, the
coupling parts may not fully engage, or a
pre-load condition can cause premature
bearing failure.
The end of the shaft must be
just flush
with
the face of the bushing. This will allow the
two portions of the coupling to fully engage
when the intermediate is secured to the en-
gine bellhousing, without pre-loading the
bearings.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two setscrews in an alternating sequence until
the bushing and coupling are fully secured. Torque
the setscrews to 14.6 ft. lbs. (175 in. lbs. or 2 m.
kg.).
If the complete coupling assembly is being re-
placed, apply ‘Loctite Retaining Compound No.
242’ or equivalent to the threads of the hardware (4
and 5), and secure the outer ring of the coupling to
the engine flywheel by torquing the hardware to 45
ft. lbs. (540 in. lbs. or 6,2 m. kg.).
Using a suitable lifting device, position the as-
sembled coupling, intermediate, shaft and bear-
ings so the flexible portion of the coupling seats in-
side the outer ring attached to the engine flywheel.
NOTE
To ease installation,
lightly
lubricate the rubber por-
tion of the coupling with a
non-petroleum based
