Rockwell Automation 1329L AC Induction Motors User Manual - Manual (Page 20)

20 AC Induction Motors
Bearing Replacement
Remove bearing by means of bearing puller. Clean bearing housing
and bearing seat prior to assembly of bearing. Place new bearing in a
bake oven for 1/2 hour at 121 degrees C (250 degrees F). Place
bearing onto shaft and push home to bearing shoulder. Hold it in
place for a minimum of 30 seconds.
After bearing has cooled down for about 1 minute, add 1/2 cu. in. of
fresh grease into back of bearing. Once motor is assembled, grease
bearings per instructions found herein.
Bracket Re-Assembly
To obtain proper planity between the integral mounting feet on the
front and back end brackets of L210-L440 frame motors, a smooth
level surface should be used to align the brackets when they are
assembled to the frame. Check for proper shaft alignment after
reinstalling the motor.
Stub Shaft Removal Procedure Drive-in Stub Shaft
1. Turn off and lockout power to the motor.
2. Remove in-line blower motor and cover assembly by removing
the hex head cap screws on cover (if enclosure is TEAO-Blower
cooled).
3. After removal of blower assembly, obtain the stub shaft puller
backplate and assemble over the stub shaft against the end of the
motor shaft.
4. Obtain the stub shaft puller plate (available from Rockwell
Automation) and assemble over the stub shaft, and up against the
puller backplate.
Important: Note 7/16 inch set screws must be backed out enough
to clear the stub shaft O.D. 1/2 inch jack screws should
be backed out to allow puller plate to fit up flush against
the backplate.
5. Screw the 7/16 inch set screws in on each side of the puller plate
until they contact the stub shaft. Keep the stub shaft reasonably
centered between the jack screws. Tighten screws securely.
6. Using a 3/8 inch allen wrench, turn the jack screws, in equal
amounts, in a clockwise manner to remove the stub shaft. If the
set screws slip, retighten and repeat process.
7. Replace blower motor and cover assembly (if TEAO - blower
cooled) with the correct extended blower cover, using the hex
head cap screws previously removed.