Gorman-Rupp Pumps PA4E71C-3TNV88-SE 1416614 and up - Manual (Page 51)

OM−06244 PA SERIES
MAINTENANCE & REPAIR PAGE E − 29
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.
Secure the outboard bearing (23) to the shaft with
the snap ring (22)
Apply a light coating of oil to the lip of the inboard oil
seal (7A) and press it into the bearing housing bore
with the lip positioned as shown in Figure 10, Detail
C. Press the oil seal into the housing until the face is
just flush with the machined surface on the hous-
ing.
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 bearing housing. 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 larger 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 bearing housing. Remove the lip seal
sleeve.
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 (7) and press it into the bearing housing
with the lip positioned as shown in Figure 10, Detail
C. The face of the oil seal should be just flush with
the machined face of the bearing housing.
Apply a light coating of oil to the lip of the oil seal
(7B) and press it into the mounting flange (20) with
the lip positioned as shown in Figure 10, Detail B.
The face of the oil seal should be flush with the
chamfer on the mounting flange bore.
Install the drive flange gasket (21) and secure the
drive flange to the bearing housing with the hard-
ware (18 and 19). Be careful not to damage the lip
of the oil seal on the shaft keyway.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Securing Bearing Housing and Drive Assembly
To Engine
(Figure 13)
Install the key (6) in the shaft keyway, making sure
to leave room in the keyway for the coupling key.
Install the drive sprocket (1) and bushing (8) on the
shaft to the dimension shown in Figure 13.
Make certain that the drive sprocket is
mounted as shown in Figure 13. This di-
mension is critical. If the drive sprocket is
not properly positioned on the shaft, it will
not align properly with the driven sprocket
on the air compressor, which can cause
premature cog belt failure.
Secure the bushing and sprocket to the shaft by
torqueing the bushing setscrews to 14.6 ft. lbs.
(175 in. lbs. or 2 m. kg.). Install the cog belt (71, Fig-
ure 9) over the sprocket and up through the slot in
the mounting flange (20, Figure 10).
Install the key for the bushing (7) in the shaft key-
way. Position the flexible portion of the coupling as-
sembly (2) on the shaft as shown in Figure 13.
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.