708-1W-00600 708-1W-00631 708-1W-01632 Fan Pump Assembly For Komatsu Dozer D475A-5 D475A-5A D375A-6

The fan pump is a hydraulically driven pump that converts mechanical energy from the engine into hydraulic energy. This pressurized oil drives the fan motor to rotate the cooling fan. The system automatically adjusts pump output flow to regulate fan speed, maintaining optimal cooling performance for the radiator and ensuring hydraulic oil and engine coolant temperatures remain within proper operating ranges.

• Fan fails to rotate or runs at insufficient speed, causing inadequate heat dissipation and elevated engine coolant & hydraulic oil temperatures
• Abnormal noise from fan pump due to internal wear or damaged bearings
• Oil leakage resulting from aging seals or cracks in pump housing
• Insufficient system pressure caused by worn valve plates, preventing required pressure buildup
• Pump body overheating triggered by contaminated oil or clogged suction filters