Gorman-Rupp Pumps 12B22-B 1343820 and up - Manual (Page 32)

OM-00589 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing seats against
the pedestal bore. Be careful not to roll or damage
the lip of the oil seal (27).
Install a new O‐ring (15) in the groove in the pedes­
tal and lubricate it with light grease.
Press the outboard oil seal (20) into the bearing re­
tainer (21) with the lip positioned as shown in Fig­
ure E-1. Be sure the setscrews (22) are fully
screwed into the bearing retainer. Position the
bearing retainer in the pedestal bore with the set­
screws positioned horizontally in line. Be careful
not to damage the lip of the oil seal (20) on the shaft
keyway. Press the bearing retainer into the pedes­
tal until it is fully seated against the outboard bear­
ing.
Install the same thickness of bearing adjusting
shims (16) as previously removed. Secure the
bearing retainer and shims using the bearing re­
taining ring (17) and 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 (28) 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.
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 (61), 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.
To ease installation of the seal, lubricate the O‐
rings and shaft sleeve (4) with water or a very small
amount of oil, and apply a drop of light lubricating
oil on the finished faces. Assemble the seal as fol­
lows, (see Figure E-3).