Installation and Maintenance Manual

GEI-M1031-B
15
V. MAINTENANCE (cont’d)
C. Lubrication and Bearings (cont’d)
The primary function of grease is to supply the essential lubricating oil from the sponge-
like reservoir of its soap structure. Grease-lubricated anti-friction ball bearings consume
only a small amount of lubricant. This lubricant must always be present to avoid rapid
wear and bearing failure. However, excessive or too frequent lubrication may damage
the motor.
Ball bearing motors are adequately lubricated at the factory. Motors with grease fittings
should be relubricated in accordance with these instructions to provide maximum
bearing life.
To obtain optimum results, Chevron SRI-2 grease (or a compatible, polyurea based
grease) should be used for relubrication, unless special grease is specified on the motor
nameplate. Regreasing frequency should be in accordance with the table below. If in
doubt, contact GE. The procedure below must be followed for safe and effective
regreasing.
2. Recommended Regreasing Procedure and Frequency
a. Run the motor until warm.
b. Stop the motor and disconnect it from the power supply.
c. Clean dirt and debris from around the inlet lubrication fitting and the grease relief
plug.
d. Clear the opening and relief tube of hardened grease. This may be accomplished
with a twisted wire brush or sturdy pipe cleaner.
e. While the motor is still warm, add grease with a hand-operated grease gun until
grease has been added to about 50-65% of the grease cavity volume listed below:
A standard 10,000 psi, 16-ounce grease gun delivers approximately 0.04 oz. of
grease with each pump, and a 24-ounce gun delivers approximately 0.06 oz. of
grease.
f. Restart the motor, and resume operation.
Warning
Relubrication should be performed with the motor stationary and disconnected from
the power source. Extreme caution must be exercised to avoid contact with rotating
parts or electrical wiring if the motor must be relubricated while running. Failure to
observe these precautions may result in damage to the equipment, injury to personnel,
or both.
Bearing Size on Motor
Nameplate
Regreasing Cavity
size (oz)
6211
6212
6213
6312
3.5
3.9
5.6
8.7
Failure to observe the foregoing instructions for regreasing may result in
grease leakage and/or bearing damage. To avoid damage to equipment,
bearings and grease must be free of dirt.
Caution