Gorman-Rupp Pumps VGH8D31-B 1379872 thru 1208738 - Manual (Page 29)

OM−06132 VGH SERIES
MAINTENANCE & REPAIR PAGE E − 7
Press the oil seal (23) into the bearing cover (25)
with the lip positioned as shown in Figure 1. Install
the gasket (26) and secure the bearing cover to the
bearing housing (15) with the capscrews (20).
Position the bearing housing on a secure work sur-
face with the seal plate end facing up. Press the
outer ring and rollers of the inboard bearing (31)
into the bearing housing until fully seated.
Install the inboard oil seal (32) in the bearing cover
(34) with the lip positioned as shown in Figure 1.
Slide the inboard bearing cover and gasket (33)
over the shaft and secure them with the capscrews
(14).
Secure the foot (29) to the bearing housing with the
hardware (27 and 28). Support the bearing hous-
ing with a wood block until the pump is fully reas-
sembled. Lubricate the bearings as indicated in
LUBRICATION at the end of this section.
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 M5 x 10mm
setscrews (53). With the wear rings installed in the
pump casing and seal plate, drill a 4 mm diameter
by 12mm deep hole between the O.D. of the wear
ring and the I.D. of the pump casing and seal plate.
Tap the hole with an M5 tap, and secure the wear
rings by installing the set screws (53).
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.