Gorman-Rupp Pumps 610M20B-B 699260 and up - Manual (Page 25)

OM−01912 60 SERIES
MAINTENANCE & REPAIR PAGE E − 7
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed. NOTE
Position the inboard bearing (21) on the shaft as
shown in Figure 2.
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 2. Bearing Installation
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.
Use caution when handling hot bearings to
prevent burns.
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 bear-
ings onto the shaft, one at a time, until they are fully
seated against the shaft shoulders. This should be
done quickly, in one continuous motion, to prevent
the bearings from cooling and sticking on the shaft.
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.
Position the oil seal (20) in the bearing cap (18) with
the lip positioned as shown in Figure 1. Press the
oil seal into the bearing cap until it it just flush with
the inside of the chamfer on the face of the bearing
cap.
Install the bearing cap gasket (20) and secure the
bearing cap to the pedestal (23) with the hardware
(16 and 17).
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing seats against
the inboard bearing cap. Use caution not to roll or
cut the lip of the oil seal during installation.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.