708-7W-00021 708-7W-00020 Bulldozer Komatsu D275 Bulldozer Fan Motor Auxiliary Motor Cooling (Radiator) Fan Motor Core Function Drives the cooling fan to dissipate heat from the engine and hydraulic system. It automatically reduces speed at idle or low temperature to save fuel and reduce noise, and increases speed under high temperature or heavy load to ensure adequate cooling. Common Faults & Troubleshooting Fan not rotating / abnormal speed: First determine whether the