START UP
1.
WARNING!
The insulation resistance of the motor winding should be checked before
energizing the motor.
2.
It is recommended that the motor be initially started uncoupled from load. Check
direction of rotation. If rotation must be changed, ALLOW THE MOTOR TO COME
TO A COMPLETE STOP, and interchange any two leads on a three phase motor. Fan
on fan-cooled motors that have directional rotation nameplates must be reversed on
the mounting shaft if the rotation is changed.
3.
Connect load. The motor should start quickly and run smoothly, if not, shut off the
power at once. Recheck the assembly including all connections before restarting.
4.
If excessive vibration is noted, check for loose mounting bolts, a motor supports
structure that is too flexible, or transmitted vibration from adjacent machinery.
Periodic vibration checks should be made as foundation settle.
5.
Operate under load condition for a short period of time. Check operating current
against nameplate.
6. On frame 320T and higher, remove shaft support sheath from the drive end of the
motor before energizing.
LUBRICATION OF BALL OR ROLLER BEARINGS
Grease lubricated bearings as supplied, are adequate for a long period of operation without
relubrication. A good maintenance schedule for regreasing will vary depending on motor size,
speed, duty and environment.
FREQUENCY OR RELUBRICATION
The following table suggests relubrication intervals for motor on normal, steady running, light
duty indoor load in relatively clean atmosphere at 40
C (104
F) ambient temperature or less.
Enclosure
Insulation
Frames 143-215T
Frames 254T +
TEFC
F
NOT GREASABLE
6 months
Frame sizes 143 through 215T, inclusive have permanently lubricated sealed bearings.
NOTE :
Frequency shown above should be reduced by:
1/2
For motors above 1800 RPM
1/2
For Heavy-Duty, Dusty locations.
1/3
For Severe-Duty, High Vibration & Shock
TYPE OF GREASE
Use Polyrex EM Polyurea grease or equivalent unless a special grease is specified on the
nameplate.
PROCEDURE FOR RELUBRICATION
When regreasing, stop motor, remove outlet plug and add amount of grease per reference table
below, with hand level gun only. Discontinue at once if grease appears at outlet plug. This may
occur before specified amount is used.
