Part No 4801-5162 Rev 09-2019
RS-500/600 M Series Doors
Page 35
18
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.
