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Gorman-Rupp Pumps U6A60S-B 1289665 and up User Manual

Page 33

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OM-05668

SUPER U SERIES

MAINTENANCE & REPAIR

PAGE E - 10

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.

Use caution when handling hot bear­
ings to prevent burns.

NOTE

Position the inboard bearing (10) on the shaft as in­
dicated 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 (25) on the shaft with
the bearing retaining ring (24).

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.

It is recommended that a sleeve be positioned
against the inboard oil seal (28) 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

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