Problem Description:

1. Main hoist pin sensor wiring fault. 2. Rotary head motor sensor oil leak.

Troubleshooting Steps:
– Rotary head motor speed sensor O-ring damaged; replaced; normal.
– Main hoist pin sensor mast connector water ingress caused wiring break; rewired; repair completed.

Root Cause:

Mast connector water ingress caused wiring break.

Required Parts:

Replaced O-ring; rewired; repair completed.