OM--01930--03
T SERIES
MAINTENANCE & REPAIR
PAGE E -- 10
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 con-
tinuous motion, to prevent the bearings from cool-
ing and sticking on the shaft.
NOTE
Position the inboard bearing (7) on the shaft as indi-
cated by the following illustration.
INSTALLATION OF NEW DEPARTURE OR
BCA/FEDERAL MOGAL 5300W SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
INSTALLATION OF MRC/SKF 5300M OR
FAFNIR 5300W SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
LOADING
DIRECTION OF
THRUST
BALL LOADING
GROOVE POSITIONED
AWAY FROM IMPELLER
GROOVE
DIRECTION OF
THRUST
LOADING
BALL LOADING
GROOVE POSITIONED
TOWARD IMPELLER
GROOVE
Figure 4. Inboard Bearing Positioning
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 retaining ring (18).
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the out-
board bearing seats against the bearing housing.
When installing the shaft and bearings into
the bearing bore, push against the outer
race.
Never
hit the balls or ball cage.
Position the inboard oil seal (4) over the shaft with
the lip positioned as shown in Figure 2. Be careful
not to damage the oil seal lip on the shaft threads.
Press the oil seal into the bearing housing until the
face is
just flush
with the machined surface on the
housing.
Press the outboard oil seal (9) into the bearing cap
(15) with the lip positioned as shown in Figure 2.
Replace the bearing cap O-ring (22), and secure
the bearing cap with the hardware (13 and 14). Be
careful not to damage the oil seal lip on the shaft
keyway.
Lubricate the bearing housing as indicated in
LU-
BRICATION
.
Seal Reassembly and Installation
(Figures 2, 5, 6 and 7)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ven-
