Answer from Ningbo Changshi: When considering a used cable puller, a thorough inspection is crucial to mitigate risk. We recommend following this professional checklist:

1. Request Full Documentation: Ask for a complete maintenance log, operating hours, and a record of any previous repairs. A seller who can provide this documentation demonstrates a history of proper care.

2. Inspect the Hydraulics and Engine: Check for any signs of hydraulic fluid leaks around the hoses, fittings, and cylinders. A professional mechanic should inspect the engine's condition and performance.

3. Examine the Winch Drum/Bullwheel: Look for any signs of excessive wear, damage, or deformation. The bullwheel's grooves should be in excellent condition to prevent damage to the pulling rope.

4. Test All Safety Features: If possible, test the automatic braking system, overload protection, and any emergency stop buttons. These are non-negotiable for safe operation.

5. Review the Frame and Welds: Inspect the winch's frame for any signs of cracking, stress fractures, or poorly executed repairs. The structural integrity is paramount to safety.

While this inspection can reduce risk, it cannot reveal the machine's full history or future reliability. This is where the advantage of buying new becomes clear—you get a machine with a full warranty, guaranteed performance, and a clear path to parts and service support.