OM-06845
SUPER T SERIES
MAINTENANCE & REPAIR
PAGE E - 16
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.
Heat the bearings to a uniform temperature
no
higher than
250
_
F (120
_
C) and slide the bearings
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one contin
uous motion, to prevent the bearings from cooling
and sticking on the shaft.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit
ably sized sleeve, and an arbor (or hydraulic) press
to install the bearings 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.
Secure the outboard bearing on the shaft with the
bearing snap ring (20).
It is recommended that a sleeve be positioned
against the inboard oil seal (4) to prevent the lip of
the oil seal from rolling as the shaft and bearings
are installed in the bearing housing. 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 larger 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 bearing housing. Remove the lip seal
sleeve.
When installing the shaft and bearings into
the bearing bore, push against the outer
race.
Never
hit the balls or ball cage.
Position the outboard oil seal (4) on the lubricated
shaft with the lip positioned as shown in Figure 4.
Press the oil seal into the bearing housing until the
face of the seal is
just flush
with the machined sur
face on the bearing housing.
Press the oil seal (4) into the drive flange (21) with
the lip positioned as shown in Figure 4. Replace
the flange gasket (18) and secure the flange to the
bearing housing with the hardware (22 and 23).
Be
careful
not to damage the oil seal lip on the shaft
keyway.
Lubricate the bearing housing as indicated in
LU
BRICATION
.
Seal Installation
(Figures 4, 8, 9 and 10)
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 seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must
be completely clean before installing the
seal.
A new seal assembly should be installed
any time
the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
