Fault Phenomenon: XCMG XKT mining truck when lifting the dump body, one cylinder suddenly fails, causing the body to tilt.

Troubleshooting Process:
– Checked pin: cylinder lug pin sheared and broken.
– Checked material: insufficient pin heat treatment hardness or inclusions.
– Checked alignment: cylinder installation misalignment causing side load.
– Checked lubrication: pin seized, unable to rotate.

Root Cause: The hoist cylinder pivot pin developed a fatigue crack due to material defect or long-term side load, eventually shearing under heavy load.

Required Parts: Replace with high-strength pivot pin, correct cylinder installation alignment.