Gorman-Rupp Pumps U6B60S-B 1289612 and up User Manual
Page 33
OM-05669
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