Gorman-Rupp Pumps PA6C60-4045T-ESP 1450296 thru 1479000 - Manual (Page 46)

PA SERIES OM−06341
MAINTENANCE & REPAIR PAGE E − 24
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 (20) and secure the out-
board bearing (21) to the shaft with the snap ring
(19).
Apply a light coating of oil to the lip of the inboard oil
seal (4) and press it into the bearing housing with
the lip positioned as shown in Figure 4. 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 in-
termediate bore until the integral retaining ring on
the O.D. of the outboard bearing is fully seated
against the bearing housing shoulder. Use caution
not to damage the lip seal (4) 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.
Install the drive flange gasket (18) and secure the
drive flange (16) to the bearing housing with the
hardware (13 and 14).
Apply a light coating of oil to the lip of the oil seal
(15) and press it into the drive flange with the lip po-
sitioned as shown in Figure 7. Be careful not to
damage the lip of the oil seal (12) on the shaft key-
way. The face of the oil seal should be just flush
with the outer face of the drive flange.
Lubricate a new bearing housing O-ring (31) 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.
Securing Bearing Housing And Drive
Assembly To Engine
(Figure 10)
Install the shaft key (22, Figure 7) in the shaft key-
way. Position the flexible portion of the coupling as-
sembly (1) on the shaft as shown in Figure 10.
NOTE
The flexible portion of the coupling must be proper-
ly positioned on the shaft. The heads of the caps-
crews in the center of the coupling must be posi-
tioned toward the drive end of the shaft.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft to the dimension
shown in Figure 10. 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
10. This is critical. If the coupling is not
properly positioned on the shaft, the
coupling parts may not fully engage, or a
pre-load condition can cause premature
bearing failure.
The coupling must be positioned 1.44
inches (37 mm) from the end of the shaft.
This will allow the two portions of the cou-
pling to fully engage when the drive flange
is secured to the engine bellhousing, with-
out pre-loading the bearings.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two setscrews in an alternating sequence until
the bushing and coupling are fully secured. Torque
the setscrews to 14.6 ft. lbs. (175 in. lbs. or 2 m.
kg.).