Milnor 60 Series, Maintenance Manual

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Chapter 3. Routine Maintenance
PELLERIN MILNOR CORPORATION
3.1.4.2.
Procedures for Motors
—If a motor on your machine does not have grease fittings, no
grease maintenance is necessary. If a motor on your machine has grease fittings, it is necessary to
add grease. But the interval is usually longer than for other maintenance. Table 11 gives motor
grease intervals and quantities for motors with specified frame sizes and speeds. You get this data
from the motor nameplate. Use Table 7 in Section 3.1.2 to record the data for the motors on your
machine.
Figure 6: Motor Grease Maintenance Conditions
Grease Fitting and Grease Relief Grease Fitting and Grease Drain
Motor Nameplate Grease Fittings, No Reliefs or Drains
Legend
1. Grease fitting
2. Grease relief. Do not remove.
3. Grease drain plug. Remove first.
4. RPM (motor speed). This example is 1465
RPM at 50 Hz and 1765 RPM at 60 Hz.
5. NEMA (IEC) frame size. Example: 256T
.
CAUTION 24 : Risk of damage —You can push grease into the windings and burn out the
motor if you fail to remove the grease drain plugs.
• If the motor has grease drain plugs, remove them before you add grease. If the motor has
grease relief fittings, it is not necessary to remove them.
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