Hydraulic Main Piston Pump CAT E303 304 Mini Excavator for 284-8038

This is a KYB variable displacement axial piston hydraulic pump designed for the CAT E303, 303C, 303CR, and 304 mini excavators. It delivers hydraulic power to the boom, arm, bucket, swing, and travel circuits, ensuring reliable and efficient machine operation.

• Part Number: 284-8038
• Pump Type: KYB Variable Displacement Axial Piston
• Compatible Models: E303, 303C, 303CR, 304
• Application: Mini Excavator Hydraulic System

The following symptoms typically indicate pump wear or failure and may require 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 fitment 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 / 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.