Fault Phenomenon: Mitsubishi heavy forklift during heavy-load operation, the steering axle suddenly fractures, vehicle collapses.

Troubleshooting Process:
– Checked axle welds: weld cracked.
– Checked load: severe overload.
– Checked fatigue: long-term fatigue.
– Checked material: material defect.

Root Cause: The steering axle fractured due to fatigue from long-term overloading.

Required Parts: Steering axle assembly replacement.