1. Remove cotter pin tapped to pulley.

2. Rotate clutch nut counterclockwise (loosen) until there is insufficient tension to permit clutch to drive door.

3. Gradually tighten clutch nut until the tension on belleville washers is sufficient to permit clutch to drive door smoothly but will allow clutch to slip if door is obstructed. It should be possible to stop moving door by hand if clutch is properly adjusted.

4. Lock clutch nut in place by inserting cotter pin.

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