Gorman-Rupp Pumps 02K52-B 1255789 and up - Manual (Page 25)

0 SERIES OM-01163
MAINTENANCE & REPAIR PAGE E - 6
is strongly recommended that the bearing
be replaced any time the shaft and bear­
ings are removed.
Inspect the shaft for distortion, nicks or scratches
or damage. Dress small nicks and burrs with a fine
file or emery cloth. Replace the shaft if defective.
The bearing may be heated to ease installation. An
induction heater, hot oil bath, electric oven, or hot
plate may be used to heat the bearing. Bearings
should never be heated with a direct flame or di­
rectly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearing, 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 bearing to a uniform temperature no
higher than 250
_F (120_C), and slide the bearing
onto the shaft until fully seated against the shaft
shoulder. This should be done quickly, in one con­
tinuous motion, to prevent the bearing from cool­
ing and sticking on the shaft.
Use caution when handling hot bear­
ings to prevent burns.
After the bearing has been installed and allowed to
cool, check to ensure that it has not moved out of
position in shrinking. If movement has occurred,
use a suitable sized sleeve and a press to reposi­
tion the bearing.
If heating the bearing is not practical, use a suitable
sized sleeve and an arbor (or hydraulic) press to in­
stall the bearing on the shaft.
When installing the bearing on 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
bearing housing until the inboard bearing is fully
seated against the bore shoulder.
When installing the shaft and bearing into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the same thickness of bearing adjusting
shims (19) as previously removed. Reinstall the re­
taining ring (18) and check the shaft endplay.
NOTE
Shaft endplay should be .002 to .010 inch (0,05 mm
to 0,25 mm). Add or remove bearing adjusting
shims to obtain this endplay.
Install the slinger ring (21) and shaft key (16).
Seal Reassembly and Installation
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.