Service manual

4801-5159 Rev 01-2015 Technical Installation and Service Manual Page 27
17 Adjustment of Brake
After extended operation of the brake lever, the brake may become worn. As the brake wears, some adjustment to
the brake is required. Lettered diagrams below correspond to lettered instructions. Follow instructions to adjust
brake:
1. Close door curtain to fully lowered position.
2. Engage Brake lever.
3. Disconnect electrical power to motor.
4. Remove four Phillips screws (A).
5. Remove cover (B).
6. Straighten the bent tab (C) of spider nut.
7. Tighten spider nut (C) snuggly against
blower wheel. Make sure a tab of
spider nut is aligned with a notch in
the shaft.
8. Bend tab (C) upward into notch of
shaft.
9. Replace cover (B).
10. Replace four Phillips screws (A).
11. Disengage brake lever (D).
12. Adjustment complete.