Fault Phenomenon: XCMG XKT mining truck a loud impact sound occurs when steering reaches the limit.

Troubleshooting Process:
– Checked cushion valve: internal cylinder cushion spool stuck.
– Checked piston: cushion plunger worn.
– Checked operation: steering speed too fast.
– Checked oil quality: contaminated fluid causing spool sticking.

Root Cause: The mechanical cushion valve inside the steering cylinder failed due to debris, unable to decelerate at the end of the stroke.

Required Parts: Steering cylinder repair kit or cylinder replacement.