Gorman-Rupp Pumps 610M20-B 688324 and up - Manual (Page 25)

60 SERIES OM−01391
MAINTENANCE & REPAIR PAGE E − 6
Clean the pedestal, shaft and all component parts
with a soft cloth soaked in cleaning solvent. Inspect
the parts for wear or damage and replace as nec-
essary.
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.
Rotate the bearings by hand to check for rough-
ness or binding. If rotation is rough, 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.
Do not attempt to remove the bearings
from the shaft unless replacement is re-
quired. Bearings will be damaged during
removal.
If bearing replacement is required, use a bearing
puller or an arbor (or hydraulic) 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 bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed.
Inspect the shaft (27) for distortion, nicks or
scratches or thread damage on the impeller end.
Dress small nicks and burrs with a fine file or emery
cloth. Replace the shaft if defective.
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. The
bearings should never be heated with a direct
flame or directly on a hot plate.
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 them one at
a time onto the shaft until fully seated against the
shaft shoulder. 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.
The outboard bearing (22) may be installed in ei-
ther direction.
NOTE
Position the inboard bearing (33) on the shaft with
the loading groove positioned as indicated in the
following illustration.