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S
XT I
, O
ERIES
NSTALLATION
PERATION AND
Motors
72
S
M
ERVICE
ANUAL
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.
Motors with grease fittings must be lubricated based on the table below.
Table 19: Motor Lubrication Intervals
NEMA Frame Size (Motor HP)
Up to 210 incl. (3 - 5 HP)
Over 210 to 280 incl. (7.5 - 20 HP)
Over 280 to 360 incl. (25 - 30 HP)
NOTE: These intervals are based on severe duty. Over
lubricating bearings could result in reduced motor life
2. A high grade ball or roller bearing grease must be used. Recommended
grease for standard service is Polyrex EM (Exxon Mobil). Other com-
patible greases include; Texaco 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 manufacturer for grease capacity recommen-
dations as capacities vary by motor. Relubrication intervals are specified in
the table above. After relubricating, allow motor to run 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 instruc-
tions for lubrication, open grease outlet and purge the system as much as
possible of the old or unwanted grease. Repeat this same operation after 1
week of service. Consult Weather-Rite LLC or the motor manufacturer for fur-
ther recommendations on grease compatibility.
Rated at 1800 RPM
6,000 hrs
4,750 hrs
3,700 hrs
.
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