Teco Installation and Maintenance Manual
TEFC Squirrel Cage Induction Motors
Teco Electric and Machinery Company
Manual Number: IOM ~ TEFC Rev.01
Chapter 7: BEARINGS
7.1. MAINTENANCE OF ROLLING BEARING.
7.1.1. General.
Bearings play a very important role in motor performance. It is essential to
keep bearings in good order for the motor to operate at optimum
performance. For this reason, please maintain bearings according to this
manual.
7.1.2. Motors within frame sizes D180 and below are complete with sealed for life
Bearings. (Unless the specification dictates these need to be re-greasible)
This type of bearing is a non maintainable item and has been pre packed
with grease and fitted with containment shields at point of manufacture.
These bearings do not require greasing for the life of the bearing.
7.1.3. Motors within frame sizes D200 and larger are equipped with through flush
greasing facilities.
Grease replenishment is required, if the motor has been out of service for 3
months or more and should also be carried out on initial start and at regular
intervals thereafter.
a. Replenishment of grease is recommended when the motor is running.
b. Clean the grease nipple and open the grease drain (if applicable) prior to
greasing. Restore after greasing.
c. A slight leakage of grease between the flinger and bearing cover is normal
and assists in totally sealing the bearing from ingress of dust and foreign
matter.
Whilst Motors are installed awaiting commissioning they must be adequately
protected against the elements, all external components in particular the shaft
extension and external labyrinth seals at the drive end must be fully covered
to avoid water ingress entering the motor body whilst stationery.
Please ensure that both the non drive end and drive end antifriction bearings
are fully purged with sufficient grease at first start up/commissioning
with the recommended grade and quantity of grease.
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