Gorman-Rupp Pumps PA10A60-4045H 1484416 and up - Manual (Page 38)

PA SERIES OM−06344
MAINTENANCE & REPAIR PAGE E − 18
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 (23) and secure the out-
board bearing (18) to the shaft with the retaining
ring (21).
Apply a light coating of oil to the lips of the inboard
oil seals (22A and 22B) and press them into the in-
termediate with the lips positioned as shown in Fig-
ure 4. Press the oil seals into the housing until they
are centered in the intermediate bore.
Slide the shaft and assembled bearings into the in-
termediate bore until the retaining ring on the out-
board bearing (18) is fully seated against the inter-
mediate. Use caution not to damage the lip seals
(22A and 22B) 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 outboard
oil seal (22) and press it into the bearing cover (17)
with the lip positioned as shown in Figure 4. The
face of the oil seal should be just flush with the
outer face of the bearing cover.
Install the bearing cover gasket (24) and secure
the bearing cover to the intermediate with the hard-
ware (15 and 16). Be careful not to damage the lip
of the oil seal (22) on the shaft keyway.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Securing Intermediate And Drive Assembly To
Engine
(Figure 7)
Install the shaft key (19, Figure 4) in the shaft key-
way. Position the flexible portion of the coupling as-
sembly (1) on the shaft as shown in Figure 7.
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 away from the pump 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 7. 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 7.
This is critical.
If the coupling is not prop-
erly 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 0.54
inches (13,7 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 bellhousing, without 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 23.3 ft. lbs. (280 in. lbs. or 3,2 m.
kg.).
If the complete coupling assembly is being re-
placed, apply ‘Loctite Retaining Compound No.
242’ or equivalent to the threads of the hardware (3
and 4), and secure the outer ring of the coupling to
the flywheel by torquing the hardware to 45 ft. lbs.
(540 in. lbs. or 6,2 m. kg.).