Hydraulic Main Piston Pump CAT D7R Track-Type Tractor for 299-5790 20R-3400

This is a variable displacement axial piston hydraulic pump designed for the CAT D7R and D7R II track-type tractors. It delivers hydraulic power for blade lifting, tilting, steering, and all working hydraulic circuits on the machine.

The following symptoms typically indicate wear or failure of the hydraulic main piston pump:

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

1. Please provide the machine serial number to confirm part interchangeability.
2. Specify your demand: complete pump assembly / spare parts / seal kit.
3. Quality options: Genuine / OEM / 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.