SECTION 22: MAINTENANCE
133 of 154
Motors Inspection:
1. Inspect motor every 3 months or 500 hours of operation, which ever occurs first. Keep
the motor clean and vent openings clear.
Lubrication:
1. M o t o r s with grease fittings must be lubricated based on the table below.
2. A high grade ball or roller bearing grease must be used. Recommended grease for
standard service is Polyrex EM (Exxon Mobil). Other compatible greases include; Tex-
aco Polystar, Rykon Premium #2, Pennzoil Pen 2 Lube and Chevron SRI.
3. Motors without grease fittings are sealed for life and do not require re-lubrication.
Instructions for Lubricating
Before greasing, be sure fittings are clean and free from dirt. Remove grease relief plug or
plate and, using a low-pressure grease gun, pump in the required grease. Do not over-
grease. Overgreasing will reduce the service life of the motor. Consult the motor manufac-
turer for grease capacity recommendations as capacities vary by motor. Relubrication inter-
vals are specified in the table above. After relu
bricating, allow motor to ru n for 10 minutes
before replacing relief hardware.
NOTE: In general it is not recommended to mix greases of different brands. The mixing of
different types of thickeners may destroy the composition and physical properties of the
grease. In the event that a different grease is required by the end user, the following steps
can be taken. Using the instructions for lubrication, open grease outlet and purge the sys-
tem as much as possible of the old or unwanted grease. Repeat this same operation after 1
week of service. Consult Rapid Engineering LLC or the motor manufacturer for further rec-
ommendations on grease compatibility.
Table 39: Motor Lubrication Intervals
NOTE: These intervals are based on severe duty. Over
lubricating bearings could result in reduced motor life
.
NEMA Frame Size (Motor HP) Rated at 1800 RPM
Up to 210 incl. (3 - 5 HP) 6,000 hrs
Over 210 to 280 incl. (7.5 - 20 HP) 4,750 hrs
Over 280 to 360 incl. (25 - 30 HP) 3,700 hrs
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