Gorman-Rupp Pumps 14C20-B 740693 and up - Manual (Page 31)

10 SERIES OM-00680
MAINTENANCE & REPAIR PAGE E - 8
bearing on the shaft with the retaining ring facing
toward the impeller end of 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
pedestal until the inboard bearing retaining ring
seats against the pedestal bore.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the oil seal (18) in the bearing cap (4) with
the lip positioned as shown in Figure E-1. Apply a
thin film of `Loctite Gasket Eliminator' or equivalent
to the face of the bearing cover, and slide the bear­
ing cover and oil seal over the shaft. Be careful not
to damage the oil seal lip. Secure the bearing cap
with the hardware (20 and 21).
Apply a light coating of soft grease to the O‐ring
(14) and install it in the groove in the pedestal (8).
Press the outboard oil seal (11) in the bearing re­
tainer (13) with the lip positioned as shown in Fig­
ure E-1.
Be sure the lockwashers and machine screws (79
and 80) are fully screwed into the bearing retainer,
and that the machine screws are positioned hori­
zontally in line. Press the bearing retainer into the
pedestal until it seats against the shims. Be careful
not to damage the oil seal lip on the shaft keyway.
Install the same thickness of bearing adjusting
shims (15) as previously removed. Secure the
bearing retainer with the retaining ring (12). 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.
Install the slinger ring (22) on the impeller 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.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non‐oil based solvent and a clean, lint‐free tissue.
Wipe lightly in a concentric pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak­
age. Clean and polish the shaft sleeve (70), or re­
place it if there are nicks or cuts on either end. If any
components are worn, replace the complete seal;
never mix old and new seal parts.
If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.