Gorman-Rupp Pumps PA12A60-B-6068H-ESP 1501367 and up - Manual (Page 48)

PA SERIES OM-06261
MAINTENANCE & REPAIR PAGE E - 28
The inner edge of the pump pulley must be
aligned with the outer edge of the drive
pulley in order to prevent side wear of the
cog belt.
Do not over‐tighten the drive belt. Over‐
tightening will cause premature belt and/or
bearing failure.
After tensioning, secure the pump support assem­
bly by tightening the jam nuts (11) and remaining
hardware (13 and 14).
Seal Reassembly and Installation
(Figures 6, 7 and 13)
Clean the bore of the seal plate (40), the seal plate
cover (45) and the shaft (32) 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.
Lay the seal plate cover on a flat surface with the
inner side facing up. Press the oil seal (23) into the
seal plate cover with the lip positioned as shown in
Detail E, Figure 7.
Install a new O‐ring (37) in the groove in the seal
plate and secure the seal plate cover to the seal
plate with the hardware (46 and 47).
Since the mechanical seal is the primary seal in the
pump, special consideration should be given to
ensure proper installation.
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, or replace it
if there are nicks or cuts on either end. If any com­
ponents 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 bel­
lows and stationary seat O‐rings 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 follows, (see Figure 13).