708-1T-00551, 708-1T-04150, 708-1T-00552 Komatsu D39-22 Bulldozer Fan Pump Auxiliary Pump
Key Features
- Precision-machined gears for high volumetric efficiency and stable output
- Durable, wear-resistant housing for long service life under heavy load
- Direct OEM-fit mounting; bolt-on replacement, no modification required
- Rigorously tested against OEM specifications for pressure and flow performance
Common Faults & Diagnosis
- Low cooling performance / abnormal fan speed: pump wear causing insufficient flow or pressure
- Abnormal noise or squealing: air ingestion, worn gears, or blocked suction filter
- Fan not working at all: check the fan motor and the pump drive gear in addition to the pump