Gorman-Rupp Pumps 04B52-B 1346496 and up - Manual (Page 25)

0 SERIES OM-01232
MAINTENANCE & REPAIR PAGE E - 6
the shaft, it is recommended that the bear­
ings be cleaned and inspected in place. It
is strongly recommended that the bear­
ings be replaced any time the shaft and
bearings are removed.
Clean the intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage and replace as necessary.
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.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
The bearings must be kept free of all dirt
and foreign material. Failure to do so will
greatly shorten bearing life. Do not spin
dry bearings. This may scratch the balls or
races and cause premature bearing fail­
ure.
Rotate the bearings by hand to check for rough­
ness or binding and inspect the bearing balls. If ro­
tation is rough or the bearing balls are discolored,
replace the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft or pedestal if the
proper bearing fit is not achieved.
If replacement is required, use an arbor (or hydrau­
lic) press to remove the bearings from the shaft.
Shaft and Bearing Reassembly and Installation
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly.
To prevent damage during removal from
the shaft, it is recommended that the bear­
ings be cleaned and inspected in place. It
is strongly recommended that the bear­
ings be replaced any time the shaft and
and bearings are removed.
Inspect the shaft for distortion, nicks or scratches
or thread damage on the impeller end. Dress small
nicks and burrs with a fine file or emery cloth. Re­
place the shaft if defective.
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.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearing. Bear­
ings should never be heated with a direct flame or
directly on a hot plate.
NOTE
Position the inboard bearing (15) on the shaft as in­
dicated in Figure 2.
Heat the bearings to a uniform temperature no
higher than 250
_F (120_C), and slide the bearings
onto the shaft one at a time until fully seated
against the shaft shoulders. This should be done
quickly, in one continuous motion, to prevent the
bearings from cooling and sticking on the shaft.
Use caution when handling hot bear­
ings to prevent burns.