Gorman-Rupp Pumps VGH2C31-B 1379872 thru 1208722 - Manual (Page 29)

OM−06117 VGH SERIES
MAINTENANCE & REPAIR PAGE E − 7
Wear Ring Installation
Inspect the throat bushing (52) for wear or scoring.
If replacement is required, position the seal plate
on the bed of an arbor (or hydraulic) press with the
impeller end facing up and use a suitably sized
dowel to press the bushing from the seal plate
bore.
Invert the seal plate on the press and use a suitably
sized sleeve to install a new bushing in the seal
plate.
The throat bushing must seat squarely in
the seal plate bore; otherwise binding and/
or excessive wear will result.
If the wear rings (42 and 44) were removed for re-
placement, press the replacement rings into the
pump casing and seal plate until they seat squarely
against the shoulders.
The wear rings must seat squarely in the
casing and seal plate bores; otherwise
binding and/or excessive wear will result.
The wear rings are held in place with M6 x 6mm set-
screws (54). With the wear rings installed in the
pump casing and seal plate, drill a 5 mm diameter
by 8mm deep hole between the O.D. of the wear
ring and the I.D. of the pump casing and/or seal
plate. Tap the hole with an M6 tap, and secure the
wear rings by installing the set screws (54).
NOTE
3/16−24 x 3/8 SAE setscrews may be substituted
for the M6 x 6mm metric setscrews. Drill and tap the
holes accordingly if using SAE setscrews.
Seal Installation
(Figures 1 and 2)
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 shaft for damage. Small scratches or
nicks may be removed with a fine file or emery
cloth. If excessive wear exists, replace the shaft.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Reusing an old seal could result in
premature failure.
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.
Do not attempt to separate the seal, this could
damage the seal. Individual parts are not sold sep-
arately.
Inspect the seal for wear, scoring, grooves, and
other damage that might cause leakage. If any
components are worn, replace the seal.
If a replacement seal is being used, remove it from
the container and inspect it to ensure that it is free
of any foreign matter.
To ease installation of the seal and seal plate, lubri-
cate the seal sleeve O-ring (40) and stationary seat
O-ring with water or a very small amount of oil. See
Figure 2 for seal part identification.