Gorman-Rupp Pumps PA6F60-4045T 1521221 and up - Manual (Page 39)

OM-06189 PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
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.
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.
After the bearings are installed on the shaft and
have been allowed to cool, pack the bearings by
hand with a good grade of No. 0 lithium base
grease. Fill the bearing cavity
Secure the bracket (9) to the frame (13) with the
previously removed hardware (11).
Slide the shaft and assembled bearings into the
frame until the inboard bearing (12) seats against
the bracket.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Lubricate the shaft in the area of the oil seal (28)
and use a suitably sized sleeve to press the oil seal
into the bracket with the lip positioned as shown in
Figure 4. Use caution not to cut or roll the lip of the
oil seal during installation.
Install the same thickness of shims (17 and 18) as
previously removed, and secure the engine brack­
et (25) to the frame with the previously removed
hardware (26). Lubricate the shaft in the area of the
oil seal (21) and use a suitably sized sleeve to press
the oil seal into the engine bracket. Use caution not
to cut or roll the lip of the oil seal during installation.
Lubricate the bearings as indicated in LUBRICA­
TION.
Drive Assembly Installation
(Figure 5)
Install the shaft key (20, Figure 4) in the shaft key­
way. Position the flexible portion of the coupling as­
sembly (3) on the shaft as shown in Figure 5.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft to the dimension
shown in Figure 5. Rotate the flexible portion of the
coupling until the tapped holes for the two set­
screws align with those in the bushing, and install
the setscrews.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure 5.