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Gorman-Rupp Pumps T8A3S-B /F,/FM,/WW,/WWS User Manual

Page 32

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OM-05277

SUPER T SERIES

MAINTENANCE & REPAIR

PAGE E - 10

ing until the face is just flush with the counterbored
surface toward 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 inboard bearing (8) 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 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).

It is recommended that a sleeve be positioned
against the inboard oil seal (21) 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