Fault Phenomenon: Komatsu WA380 wheel loader after continuous operation, the water temperature gauge enters the red zone, radiator boils.

Troubleshooting Process:
– Checked radiator: radiator exterior clogged with mud.
– Checked fan: fan belt slipping.
– Checked thermostat: thermostat unable to open.
– Checked water pump: water pump impeller corroded or detached.

Root Cause: The engine radiator exterior is severely clogged with mineral dust and debris, causing insufficient airflow and reduced cooling efficiency.

Required Parts: Clean radiator, replace fan belt and thermostat.