Fault Phenomenon: Kobelco truck crane front tires show single-sided shoulder wear (scalloping).

Troubleshooting Process:
– Checked tire pressure: normal.
– Checked toe-in value: out of tolerance.
– Checked steering linkage clearance: excessive clearance.
– Performed wheel alignment to adjust toe-in, replaced tie rod ends.

Root Cause: Incorrect front wheel toe-in and excessive steering mechanism clearance.

Required Parts: Steering tie rod ends.