Gorman-Rupp Pumps 54J20-B 1410811 and up - Manual (Page 30)

50 SERIES OM-01342
MAINTENANCE & REPAIR PAGE E - 8
Replace the bearing cap gasket (20). Install the
pedestal foot (27) and secure the bearing cap us­
ing the hardware (22 and 23). Check shaft endplay.
NOTE
Impeller shaft endplay should be between .002 and
.010 inch (0,05 mm to 0,25 mm). Add or remove
bearing shims to establish the correct endplay.
Lubricate the shaft in the area of the oil seal (24)
and press the oil seal into the bearing cap with the
lip positioned as shown in Figure 1. Use caution
not to roll or cut the lip of the oil seal on the shaft
keyway.
NOTE
Press the oil seal into the bearing cap far enough to
provide clearance between the seal lip and the im­
peller shaft keyway.
Replace the casing gasket (12) and secure the
pedestal to the pump casing using the nuts (32).
Lubricate the bearing cavity as indicated in LUBRI­
CATION at the end of this section.
Seal Reassembly and Installation
(Figures 1 and 4)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
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.
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. If any components are worn, replace the com­
plete 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 bel­
lows and the stationary seat O‐rings with water or a
very small amount of light lubricating oil, and apply
a drop of light lubricating oil on the finished faces,
never use grease. Assemble the seal as follows
(see Figure 4).