708-1S-00240 708-1S-00950 708-1S-00910 Bulldozer Komatsu D65 D375 D475 Fan Pump Parts
Complete overhaul kit including Cylinder Block, Valve Plate, Piston (Slipper), Retainer Plate, Swashplate, and Seal Kit for Komatsu D65 D375 D475 Fan Pump Parts.
Component Parts List
- Cylinder Block (Pump Barrel)
- Valve Plate
- Piston, Nine-hole (Piston Bore)
- Piston Slipper (Copper Slipper)
- Swashplate (Cam Plate)
- Main Shaft
- Bearings (Large & Small)
- Complete Repair Kit
Common Faults
- Fan not rotating / low speed: Pump wear causing insufficient flow and pressure; blocked suction filter; low oil level.
- Unstable / jittery fan speed: Severe pump internal leakage, air in the oil circuit, abnormal control/regulating valve.
- Abnormal noise / squealing: Insufficient suction or air ingress (cavitation), worn gears, contaminated oil.
- High oil temperature: Severe pump internal leakage, poor system cooling, accelerating wear.
- Oil leakage: Aged shaft oil seal, worn end-cover O-rings.
Repair Recommendations
- Light wear: Replace the oil seal + seal kit and clean the interior.
- Worn gears / bearings: Replace the gear and bearing parts or the complete pump assembly.
- Fill with hydraulic oil before starting after reassembly to avoid running dry.
- After repair, replace the hydraulic filters and clean the oil tank.
- When ordering, confirm the D65 D375 D475 sub-model and the original old part number.
Product Images
Note: Ensure proper model identification and part number verification when ordering replacement components.