American Dryer Corp. Phase 5 Microprocessor AD-170 - Manual (Page 37)

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V-Belt Tension Adjustment (Motor to Idler)
1. Discontinue power to dryer.
2. Loosen the nuts on the four (4) studs holding the drive motor mount to the back of the dryer.
3. Loosen the jam nuts on the adjustment screw on the top of the motor mount.
4. Turn the adjustment screw to lower the motor mount (to tighten the belts) or raise the motor mount
(to loosen the belts).
5. Check the vertical plane of the motor pulley and idler pulley for parallel alignment.
6. If realignment is required, loosen motor pulley and bushing and move motor pulley to proper
position.
7. Retighten motor mount bolts and jam nuts.
8. Reestablish power to dryer.
To Replace V-Belts
1. Loosen tension on V-belts so that they can easily be rolled off pulleys.
2. Replace V-belts.
3. Retighten V-belts and adjust tension and alignment per previous instructions.
J. Motors
To Replace Drive Motor
1. Discontinue power to dryer.
2. Remove drive belts.
3. Disconnect wiring harness from motor.
4. Remove bolts holding motor to mount and
replace with new motor. Do not tighten bolts.
5. Remove pulley from old motor and install on
new motor.
NOTE: Always replace V-belts in pairs.