MIL-HDBK-1164
Table 17
Maintenance Checklist for Bearings
Inspection
Action
(1),(2)
Antifriction bearings
Check bearing
Check with a standard thermometer.
M
temperature
Antifriction bearings that are running too hot
probably have too much lubricant.
Change lubricant
Change lubricant according to Table 14). If
Q
lubricant change does not prevent
overheating, disassemble and inspect the
bearing. If nothing appears to be wrong,
check the pump and motor alignment.
Q
Check clearances
During the quarterly lubrication change, check
the clearances. Recommended clearance is
0.002 inch (51 ), plus 0.001 inch (25 ) for
each inch (25 mm) of the shaft-journal
diameter.
A
Check bearing
Each year, when the pump is dismantled,
condition
check the condition of the bearings and the
bearing race; replace as necessary.
The preferred method in general use for
mounting a bearing on a pump shaft is to heat
the bearing to expand the inner race and
shrink it on the shaft. The bearing is heated in
an oil bath or electric oven to a uniform
temperature of 200 to 250F (93 to 121C).
When heated, it should be quickly mounted on
the shaft.
An alternate method uses force exerted by an
arbor press or hammer blows. In forcing a
bearing onto a shaft, be sure that the race is
never cocked during the operation. The
bearing position on the shaft should be
pressed firmly against the shaft shoulder.
Check with a feeler gage.
96
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