Gorman-Rupp Pumps PA6C60C-F6L 1423057 thru 1477477 - Manual (Page 42)

PA SERIES OM−05771
MAINTENANCE & REPAIR PAGE E − 20
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.
NOTE
The inboard bearing (3) comes from the manufac-
turer with a retaining ring installed on the bearing
O.D. This retaining ring must be removed prior to
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.
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 outboard bearing (8) on the shaft with
the integral O.D. retaining ring positioned toward
the drive end of 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.
Install the thrust washer (13) and secure the out-
board bearing (8) to the shaft with the snap ring
(12).
Apply a light coating of oil to the lip of the inboard oil
seal (17) and press it into the bearing housing bore
with the lip positioned as shown in Figure 5. Press
the oil seal into the housing until the face is just
flush with the machined surface on the housing.
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the out-
board bearing seats against the bearing housing.
Use caution not to damage the lip of the oiil seal
(17) on the shaft threads.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Apply a light coating of oil to the lip of the oil seal
(11) and press it into the mounting flange (9) with
the lip positioned as shown in Figure 5. The face of
the oil seal should be just flush with the outer face
of the mounting flange.
Install the drive flange gasket (16) and secure the
drive flange to the bearing housing with the hard-
ware (14 and 15). Be careful not to damage the lip
of the oil seal (11) on the shaft keyway.
Lubricate a new bearing housing O-ring (37) with
grease and install it in the groove in the bearing
housing.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.