Gorman-Rupp Pumps 66B3-B 407277 and up - Manual (Page 28)

OM−01459 60 SERIES
MAINTENANCE & REPAIR PAGE E − 7
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the retaining rings in shrinking. If move-
ment has occurred, use a suitably sized sleeve and
a press to reposition the bearings against the re-
taining rings.
If heating the bearings is not practical, use a suit-
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
Slide the shaft and assembled bearings into the
pedestal bore until the inboard bearing is fully
seated against the pedestal shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Lubricate the shaft in the area of the oil seal (5) and
press the oil seal into the pedestal with the lip posi-
tioned as shown in Figure 1. Use caution not to roll
or cut the lip of the oil seal on the shaft keyway.
Install the same thickness of bearings shims (37)
as previously removed.
Install the pedestal foot (15) and secure the bear-
ing cap and foot to the pedestal using the hard-
ware (13 and 14). 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.
Install the slinger ring (4).
Lubricate the bearing cavity as indicated in LUBRI-
CATION at the end of this section.
Pump Casing and Balance Ring Installation
If the balance ring (24) was removed at disassem-
bly, press the replacement ring into the pump cas-
ing until fully seated.
The balance ring must seat squarely in the
casing bore or binding and/or excessive
wear will result.
Use a suitable lifting device to position the pump
casing against the pedestal (19) so the lubrication
hole in the casing aligns with the hole in the pedes-
tal, and secure it with the previously removed hard-
ware (21 and 22).
Seal Installation
(Figures 1 and 3)
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.