Fault Phenomenon: Effer truck crane during heavy load operation, a loud noise comes from the chassis, one outrigger beam breaks, causing the body to tilt.

Troubleshooting Process:
– Visual inspection: fatigue crack propagation at the beam weld.
– Checked operating conditions: severe off-center lifting.
– Checked outrigger pads: no pads used, excessive ground pressure.
– Replaced beam assembly, strictly prohibited improper operation.

Root Cause: Long-term fatigue damage combined with improper off-center lifting operations led to structural fracture.

Required Parts: Outrigger beam assembly.