Cause / 602

1. Broken ratchet chain. 2. Sheared key on sprocket. 3. Broken guide pin and/or spring. 4. Ratchet clog worn. 5. Ratchet wheel worn.

Repair / 602

1. Replace or repair chain. 2. Replace key. 3. Replace parts as needed. 4. Replace ratchet clog. 5. Replace wheel.