Hydraulic Main Piston Pump CAT D8R D8N Track-Type Tractor for 139-4151 0R-4612 6E-1661

This variable displacement axial piston hydraulic pump is designed for the CAT D8R, D8R II, and D8N track-type tractors. It delivers reliable hydraulic power for blade lifting, tilting, steering, and all working hydraulic circuits on the machine.

The following symptoms may indicate that the hydraulic main piston pump requires inspection or replacement:

1. Insufficient hydraulic power and slow movement
2. Excessive internal pump leakage, unable to build up pressure
3. Abnormal noise and severe vibration of the pump
4. Hydraulic oil overheating
5. Oil leakage at the pump shaft and joint surface
6. Stuck displacement mechanism, flow control failure

To ensure correct part selection and delivery, please provide the following information when ordering:

1. Please provide the machine serial number to confirm part interchangeability.
2. Specify your demand: complete pump assembly, spare parts, or seal kit.
3. Quality options: Genuine, OEM, or Remanufactured.
4. Pre-delivery inspection: pressure test and visual inspection.
5. Seals and O-rings can be provided upon request.
6. Export packing with shockproof and anti-rust treatment.