Gorman-Rupp Pumps PAH6B60-6068H IT4 1529202 and up - Manual (Page 45)

PAH SERIES OM-06602
MAINTENANCE & REPAIR PAGE E - 22
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, rollers or cage. Press only on
the inner race.
It is recommended that a new bearing lock
washer (23) be installed any time the shaft
and bearings are disassembled. Re‐use of
an old lock washer may create a pre‐load
condition on the bearing, resulting in pre­
mature bearing failure.
Install the bearing lockwasher (23) and screw the
bearing locknut (22) onto the shaft until tight.
Torque the bearing lock nut to (150 ft. lbs. (20,8 m.
kg.). After torquing, locate the tab on the lockwash­
er that aligns with a slot in the lock nut and bend the
tab over into the slot.
Apply a light coating of oil to the lip of the inboard oil
seal (11) and press it into the pedestal bore with the
lip positioned as shown in Figure 6. Press the oil
seal into the pedestal until the face is just flush
with the machined surface on the pedestal.
It is recommended that a sleeve be positioned
against the inboard oil seal to prevent the lip of the
oil seal from rolling as the shaft and bearings are
installed in the pedestal. The O.D. of the sleeve
should be just smaller than the bearing housing
bore, while the I.D. of the sleeve should be just larg­
er than the O.D. of the lip seal area of the shaft.
With the lip seal sleeve in place, lubricate the lip
seal area of the shaft and slide the shaft and as­
sembled bearings into the bearing housing until
the retaining ring on the outboard bearing seats
against the pedestal. Remove the lip seal sleeve.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls, rollers or cages.
Apply a light coating of oil to the lip of the outboard
oil seal (11) and press it into the pedestal with the
lip positioned as shown in Figure 6. The face of the
oil seal should be just flush with the outer face of
the bearing cap.
Apply a light coating of oil to the lip of the oil seal
(19) and press it into the drive flange (20) with the
lip positioned as shown in Figure 6. The oil seal
should be centered in the flange bore.
Install the gasket (21) and slide the assembled
drive flange and oil seal over the impeller shaft. Use
caution not to cut or roll the lip of the oil seal (19) on
the shaft keyway. Secure the drive flange to the
pedestal with the hardware (15 and 16). Torque the
capscrews (16) to 41 ft. lbs. (5,7 m. kg.).
Lubricate the bearings as indicated in LUBRICA­
TION at the end of this section.
Securing Pedestal And Drive Assembly To
Engine
(Figure 9)
Install the shaft key (28, Figure 6) in the shaft key­
way. Position the flexible portion of the coupling as­
sembly (3) on the shaft as shown in Figure 9.
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.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft until the face of the
bushing is just flush with the end of the shaft. Ro­
tate the flexible portion of the coupling until the
tapped holes for the two setscrews align with those
in the bushing, and install the setscrews.