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N. Excessive noise and/or vibration...
1. Dryer is not leveled properly.
2. Impellor (fan/blower) out of balance ...
a. Excessive lint build up on the impellor (fan/blower).
b. Failed impellor (fan/blower).
3. Loose basket (tumbler) tie rod.
4. Basket (tumbler) out of adjustment, or adjustment bolts (hardware) are loose.
5. Failed basket (tumbler) support.
6. Loose motor mount.
7. Failed idler bearing(s) or basket (tumbler) bearing(s).
8. V-belts too tight or too loose
9. Bearing set screw(s) (either basket [tumbler], idler, or blower [impellor/fan] shaft are loose.
10. Failed motor bearing.