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34 American Dryer Corp. 450268-1
H. TUMBLER AND BEARING ASSEMBLY
(Remove back guard to access assembly)
TO REPLACE TUMBLER PULLEY (NON-REVERSING)
1. Loosen V-belts, then rotate pulley and roll
V-belts out of the grooves.
2. Loosen two (2) setscrews on the pulley
and pull the pulley off the shaft.
3. Reverse procedure for installing the new
tumbler pulley.
NOTE: Check belt alignment before
operating the dryer.
TO REPLACE TUMBLER PULLEY (REVERSING)
1. Loosen V-belts, then rotate pulley and roll
V-belts out of the grooves.
2. Remove cap screws securing taper lock
hub to pulley.
3. Insert cap screws in tapped removal
holes and tighten evenly until bushing
becomes loose in pulley. See figure “A”.
4. Remove bushing, pulley, and key.
5. Assemble bushing and pulley as shown
in figure “B”. When cap screws are
loosely inserted, bushing remains fully
expanded to provide a sliding fit to the
shaft.
6. Insert key on the shaft, then slide pulley
to desired position with cap screw heads
to the outside.
7. Tighten cap screws progressively. There
remains a gap between the pulley hub
and the flange of the bushing.
IMPORTANT: Tighten screws evenly and progressively. Never allow the pulley to be in
contact with the flange of the bearing. This gap should measure from 1/8” to
1/4”. Proper cap screw torque is 30 ft-lb (40.67 Nm), if greater tightening
forces are applied, excess pressure will be created in the hub of the
mounted pulley, which may cause it to crack.