Gorman-Rupp Pumps 14C20-4024T 1303140 and up - Manual (Page 33)

OM−05781 10 SERIES
MAINTENANCE & REPAIR PAGE E − 11
the oil has been previously used, it must be thor-
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_F (120_C), and slide the bearings
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
The loading groove on both bearings (18 and 29)
must be positioned away from the impeller end of
the shaft.
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 and assembled bearings into the in-
termediate bore until the inboard bearing is fully
seated against the bore shoulder. Be careful not to
damage the lip of the oil seal (34) 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 (24) and press it into the bearing cap (21)
with the lip positioned as shown in Figure E−2. The
face of the oil seal should be just flush with the
outer face of the bearing cap.
Install the same thickness of bearing adjusting
shims (27) as previously removed, and secure the
bearing cap and gasket (20) to the intermediate
with the hardware (22 and 23). Be careful not to
damage the lip of the oil seal on the shaft keyway.
NOTE
Shaft endplay should be .002 to .010 inch (0,05 to
0,25 mm). Add or remove bearing adjusting shims
until the correct endplay is achieved.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Securing Intermediate And Drive Assembly To
Engine
(Figure E−3)
Install the shaft key (25, Figure E−2) in the shaft
keyway. Position the flexible portion of the coupling
assembly (3) on the shaft as shown in Figure E−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.
Align the keyway in the bushing (3) with the shaft
key, and slide it onto the shaft until it is just flush
with the end of the shaft. Rotate the flexible portion
of the coupling until the tapped holes for the two
setscrews align with those in the bushing, and in-
stall the setscrews.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure
E− 3. 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 end of the shaft must be recessed
0.41 inch (10,4 mm) from the face of the