Gorman-Rupp Pumps 16C20-F4L 1317844 and up - Manual (Page 33)

OM-01604 10 SERIES
MAINTENANCE & REPAIR PAGE E - 11
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con­
tinuous motion, to prevent the bearings from cool­
ing and sticking on the shaft. NOTE
Position the inboard bearing (52) on the shaft as in­
dicated in Figure 4.
INSTALLATION OF FEDERAL MOGAL 5300W
OR NTN 3300 SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
INSTALLATION OF MRC/SKF 5300M, 5300E OR
TIMKEN 5300W SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
LOADING
DIRECTION OF
THRUST
BALL LOADING
GROOVE POSITIONED
AWAY FROM IMPELLER
GROOVE
DIRECTION OF
THRUST
LOADING
BALL LOADING
GROOVE POSITIONED
TOWARD IMPELLER
GROOVE
Figure 4. Inboard Bearing Positioning
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.
Slide the shaft (47) and assembled bearings (50
and 52) into the intermediate bore until the inboard
bearing is fully seated against the bore shoulder.
Be careful not to damage the lip of the oil seal (56)
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 (48), and press it into the bearing cap (45)
with the lip positioned as shown in Figure 2. The
face of the oil seal should be just flush with the
outer face of the bearing cap.
Install the wavy washer (49) and bearing cap gas­
ket (42), and secure the bearing cap to the interme­
diate with the hardware (43 and 44). Be careful not
to damage the lip of the oil seal (48) 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 3)
Install the shaft key (46, Figure 2) in the shaft key­
way. Position the flexible portion of the coupling as­
sembly (3) on the shaft as shown in Figure 3.
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 pump end of the shaft.