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CLCH-SVX01B-EN
Service and
Repair
Bearing and Drive Belt Replacement
WARNING
HAZARDOUS VOLTAGE! Disconnect all electrical and remote
disconnects before servicing. Do not open the service access
doors while the unit is operating. Failure to disconnect all
electrical power before servicing could result in death or
serious injury.
Bearing removal on the pulley side of the wheel is required to
remove and replace the drive belt on removable-segment wheels.
Bearing removal is not required on small, non-segment wheels
(unit size 8, 1500 CFM). These belts may be replaced by temporarily
dismounting and rotating the pulley side bearing beam to allow the
new belt to be installed on the wheel rim. Bearing removal is
discussed first in this procedure.
1
Disconnect all electrical power.
2
Obtain access to the pulley side bearing access plate. (You
may need to remove the wheel segments.)
3
Remove the two bearing access plate retaining screws and the
access plate.
4
Using a hexagonal wrench, loosen the set screw in the
bearing locking collar.
5
Using a light hammer and a drift placed in the drift pin hole in
collar, tap the collar in the opposite direction of wheel rotation
to unlock the collar.
6
Remove the collar.
7
Using a socket wrench with an extension, remove the two
nuts that secure the bearing housing to the bearing support
beam.
8
Slide the bearing from the shaft. Note that slight hand
pressure against the wheel rim will lift the weight of the wheel
from the inner race of the bearing to assist bearing removal
and installation. The use of a bearing puller may be required.
9
Using a wrench, remove the diameter seal retaining screws or
hub seal retaining screws and remove the diameter seals or
hub seals from the bearing beam. See Figure 8 for an
exploded view of the shaft, bearings, belt, etc.
10 Remove the old belt.
21
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