Fault Phenomenon: SANY SR285 rotary drilling rig auxiliary winch wire rope tangles and crushes itself during retraction.

Troubleshooting Process:
– Checked rope guide: rope guide mechanism seized or damaged.
– Checked drum grooves: drum grooves severely worn.
– Checked operation: excessive speed changes during operation.
– Checked tension: insufficient wire rope tension.

Root Cause: The auxiliary winch rope guide transmission chain broke or seized, preventing the guide block from moving with the drum.

Required Parts: Repair or replace rope guide transmission chain and guide block.