Gorman-Rupp Pumps 12B22-B 1059806 thru 1343819 - Manual (Page 27)

OM--00589--03 10 SERIES
MAINTENANCE & REPAIR PAGE E -- 7
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor-
oughly filtered.
Use caution when handling hot bear-
ings to prevent burns.
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 suitable sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit-
able 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.
Position the inboard oil seal (29) in the pedestal
(25) with the lip positioned as shown in Figure
E---1. Press the oil seal into the pedestal until the
face is
just flush with the machined surface in the
housing.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing seats against
the pedestal bore.
Be careful not to damage the oil
seal lip.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the same thickness of bearing adjusting
shim (17) as previously removed. Replace the
bearing retainer O-ring (18). Apply a light coating
of soft grease on the O-ring and the O-ring groove.
Press the outboard oil seal (22) in the bearing re-
tainer (23) with the lip positioned as shown in Fig-
ure E---1. Press the bearing retainer into the pedes-
tal until it seats against the bearing.
Be careful not
to damage the oil seal lip on the shaft keyway. Be
sure the setscrews (24) are fully screwed into the
bearing retainer, and that they are positioned hori-
zontally inline.
Use snap ring pliers to install the bearing retaining
ring (19). Check the shaft endplay.
NOTE
Shaft endplay should be between .002 and .010
inch (.05 to .25 mm). Add or remove bearing adjust-
ing shims to achieve the correct endplay.
Slide the slinger ring (30) onto the shaft.
Lubricate the pedestal as indicated in LUBRICA-
TION at the end of this section.
Seal Reassembly and Installation
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
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 impeller shaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If excessive wear exists, the shaft
will have to be replaced.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency,
carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.