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Gorman-Rupp Pumps T8A65S-B /F,/FM User Manual

Page 32

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OM-05498

SUPER T SERIES

MAINTENANCE & REPAIR

PAGE E - 10

face is just flush with the counterbored surface to­
ward the inside of the housing.

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.

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 bearings. Bear­
ings 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.

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 bearing (8) on the shaft as indicated by
the following illustration.
Position the bearing (20)
on the shaft with the integral retaining ring on the
bearing O.D. toward the drive end of the shaft.

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 5. 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 snap 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.