PAH SERIES
OM-07186
MAINTENANCE & REPAIR
PAGE E - 20
Shaft and Bearing Reassembly and Installation
(Figure 5)
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly
.
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.
Inspect the shaft (31) for distortion, nicks or
scratches. Dress small nicks and burrs with a fine
file or emery cloth. Replace the shaft if defective.
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 bearing. The
bearings should
never
be heated with a direct
flame or directly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be
absolutely
clean. If
the oil has been previously used, it must be
thor
oughly
filtered.
NOTE
Position the outboard bearing (28) on the shaft with
the retaining ring on the bearing O.D.
toward
the
drive end of the shaft
. The inboard bearing (33) is
equipped with a flange ring that is shipped loose
with the bearing. Install the flange ring on the shaft
prior to heating and installing the bearings.
Heat the bearings to a uniform temperature
no
higher than
250
F (120
C) and slide them one at a
time onto the shaft until fully seated against the
shaft shoulders. This should be done quickly, in
one continuous motion, to prevent the bearings
from cooling and sticking on the shaft.
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.
After installation, pack the bearings by hand with
lithium EP2 grease until fully lubricated.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing is fully seated
against the bearing retaining ring.
It is recommended that a new bearing lock
washer (27) be installed any time the shaft
and bearings are disassembled. Re‐use of
an old lock washer may create a pre‐load
condition on the bearing, resulting in pre
mature bearing failure.
Install the bearing lockwasher (27) and screw the
bearing locknut (26) onto the shaft until tight.
Torque the bearing lock nut to 150 ft. lbs. 20,8 m.
kg.). After torquing, locate the tab on the lock
washer that aligns with a slot in the lock nut and
bend the tab over into the slot.
Apply a light coating of oil to the lip of the inboard oil
seal (19) and press it into the pedestal bore with the
lip positioned as shown in Figure 5. Press the oil
seal into the pedestal until the face is
just flush
with the machined surface on the pedestal.
It is recommended that a sleeve be positioned
against the inboard oil seal to prevent the lip of the
oil seal from rolling as the shaft and bearings are
installed in the pedestal. The O.D. of the sleeve
should be just smaller than the bearing housing
bore, while the I.D. of the sleeve should be just larg
er than the O.D. of the lip seal area of the shaft.
With the lip seal sleeve in place, lubricate the lip
seal area of the shaft and slide the shaft and as
sembled bearings into the bearing housing until
the retaining ring on the outboard bearing seats
against the pedestal. Remove the lip seal sleeve.
