Installation instructions

GEI-M1011A
Table 2
OIL VISCOSITY
(For a particular motor, refer to the lubrication nameplate or instructions)
Oil Viscosity – SUS
Bearing Function and Location Bearing Type @ 40°C (100°F) @ 100°C (210°F) GE Spec
Thrust Bearing
(In top end shield)
320-5013 Frame
Angular Contact Ball
Spherical Roller
150
600 or 300
45
70
53
D6B6A
D6B14C1
D6B6B
Guide Bearing (in base end shield)
For motors with oil lubrication in
lower bearing.
Ball 150 45 D6B6A
In some cases, water-cooling for the oil is impractical or
undesirable and the normal operating oil temperature will be
in range of 75-100
°C (170-210ºF). Also, in some cases, the
bearing size, thrust-load and speed are so high that even with
water cooling the normal oil temperature may be as high as
100
°C (210ºF). In these cases, it is especially important that
proper viscosity, high-grade oil containing an oxidation
inhibitor be used. Observe the condition of the oil frequently
and change oil when it begins to show signs of deterioration.
Oil-lubricated bearing housings are provided with large
settling chambers in which dust, dirt, and sludge collect.
Unless the oil has been permitted to oxidize, the draining of
the old oil during regular changes will usually provide
sufficient flushing action to clean out the reservoir.
Whenever the motor is disassembled for general cleaning
and reconditioning, the bearing housing may be washed out
with a suitable cleaning solvent. 1,1,1, Trichloroethane may
be used, following the same instructions and cautions as
shown for cleaning windings. Avoid using any solvent that
will soften the paint used on the interior of the oil reservoir.
Be sure that the oil-metering hole is clear, and then dry the
housing thoroughly before reassembly.
2. Grease Lubricated Bearings
WARNING: Relubrication should be
performed with the motor stationary
and disconnected from the power
source. Failure to observe these
precautions may result in damage to the
equipment, injury to personnel or both.
Top and bottom bearing on 182-286 frame and bottom
bearing on 320 frame sizes and larger are generally grease
lubricated. The thrust bearings of motors with speeds above
1800 RPM should be regreased every 1000 hours of
operation with an interval not to exceed three months. For
motors with speeds 1800 RPM and below, regrease every
2000 hours of operation with the interval not to exceed 6
months. The guide bearings should be regreased in
accordance with Table 3.
TABLE 3
RECOMMENDED FREQUENCY OF REGREASING
Type of HP Lubrication
Service Typical Examples Range Interval
Easy
Valves; door openers; portable floor sanders; motor operating infrequently (one
hour per day)
1.0 – 7.5
10 – 40
50 – 150
200 – 1000
9 years
3 years
1.5 years
9 months
Standard
Machine tools; air conditioning apparatus; conveyors, one or two shifts; garage
compressors; refrigeration machinery; oil well pumps; water pumps, wood
working machinery
1.0 – 7.5
10 – 40
50 – 150
200 – 1000
3 years
1 year
6 months
3 months
Severe
Motors for fans, machine tools, M-G sets, etc. that run 24 hours per day, 365
days per year; coal and mining machinery; motors subject to severe vibration;
steel mill machinery
1.0 – 7.5
10 – 40
50 – 150
200 – 1000
1.5 years
6 months
3 months
1.5 months
Very
Severe
Dirty, vibrating applications, where end of shaft is hot (pumps and fans); high
ambient temperature
1.0 – 7.5
10 – 40
50 – 150
200 – 1000
6 months
3 months
2 months
1 month
NOTE: Table 3 is intended as a guideline, but the user is ultimately responsible for regreasing the
motor and maintaining adequate grease at the bearings. If in doubt, refer to the General Electric
Company.
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