Gorman-Rupp Pumps 83B2-B 1063841 and up - Manual (Page 28)

OM−00868 80 SERIES
MAINTENANCE & REPAIR PAGE E − 7
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor-
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_F (120_C), and slide the bearings
onto the shaft (28), one at a time, until they are fully
seated. This should be done quickly, in one con-
tinuous motion, to prevent the bearings from cool-
ing and sticking on the shaft.
Use caution when handling hot bear-
ings to prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
out of position in shrinking. If movement has oc-
curred, use a suitable sized sleeve and a press to
reposition the bearings.
If heating the bearings is not practical, use a suit-
able 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 until the inboard bearing is fully seated
against the bore shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the oil seal (17) into the pedestal bore until
fully seated with the lip positioned as shown in
Figure 1.
Press the oil seal (25) into the bearing retainer (30)
with the lip positioned as shown in Figure 1. Re-
place the bearing retainer O-ring (23) in the pedes-
tal, and lubricate it with grease. Press the bearing
retainer into the pedestal until it seats against the
bearing. Be careful not to cut the oil seal lip on the
shaft keyway. Be sure the setscrews (26) in the
bearing retainer are positioned horizontally inline.
Install the same thickness of bearing adjusting
shims (29) as previously removed. Reinstall the re-
taining ring (24) and check shaft endplay.
NOTE
Shaft endplay should be .002 to .010 inch (0,05 to
0,25 mm). Add or remove bearing adjusting shims
to obtain this endplay.
Install the slinger ring (16) and shaft key (27). Install
any leveling shims used under the pedestal feet.
Secure the pedestal to the base using the mount-
ing hardware.
Seal Reassembly and 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.
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.