Answer from Ningbo Changshi: When a company chooses a used piece of heavy-duty equipment, they're often inheriting its history of use, which can lead to common points of failure that cause costly downtime. The most frequent issues we see with used equipment are:

• Hydraulic System Degradation: The hydraulic pump, hoses, and seals are subjected to high pressure and heat. Over time, these components wear out. A used machine may have a compromised hydraulic system, leading to a loss of pulling power, fluid leaks, and eventual catastrophic failure.

• Engine and Transmission Wear: The diesel or gasoline engine and the hydraulic transmission on a used machine may have been poorly maintained. This leads to reduced power, increased fuel consumption, and a higher risk of unexpected breakdowns.

• Structural and Weld Fatigue: A heavy-duty puller's frame is its backbone. A used machine may have microfractures or fatigued welds from years of high-stress operation, which are not always visible during a simple inspection. These can fail suddenly under a full load, creating an extremely dangerous situation.

• Worn Bullwheels and Drums: The grooved surfaces of the bullwheel or drum are designed to grip the pulling rope. If these are worn or damaged, they can slip under tension, reducing efficiency and potentially damaging both the rope and the conductor.

Investing in a new machine from a reputable manufacturer ensures you get a clean slate with no hidden issues.