Gorman-Rupp Pumps 86A2-F3L 1257390 thru 1330588 - Manual (Page 31)

80 SERIES OM--00955
MAINTENANCE & REPAIR PAGE E -- 10
Shaft and Bearing Reassembly and Installation
(Figure 2)
Clean the intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage and replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
Pre-pack the bearings by hand (or use a bearing
packer if available) with No. 0 lithium base grease
until the bearing rollers are thoroughly lubricated.
Position the inboard and outboard bearing cones
on the impeller shaft with the high side of the ta-
pered roller bearings toward the lubrication cavity.
Press the cones onto the shaft until seated square-
ly against the shaft shoulders.
When installing the bearings onto the
shaft, never press or hit against the rollers
or roll cage. Press only on the inner race.
Press the bearing closure (33) and inboard bearing
cup (31) into the intermediate until squarely seated
against the intermediate shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the rollers or roll cage.
Slide the shaft and assembled bearing cones into
the intermediate bore from the drive end until the
inboard bearing cone (32) fully engages the in-
board bearing cup. Press the outboard bearing
cup (26) over the outboard bearing cone (27).
Install the same thickness of bearing adjusting
shims (30) as previously remove, and secure them
with the bearing cap (28) and hardware (22 and
23). Check the shaft endplay.
NOTE
Shaft endplay should be between .003 and .005
inch (0,08 to 0,13mm). Add or remove bearing
shims to establish the correct endplay.
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 (25, 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.
Align the keyway in the bushing (2) 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 3.
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.