Hydraulic Piston Pump PVD-2B-40P / PVD-2B-42L for EX40 Excavator – Main Pump

The PVD-2B-40 is a classic swashplate-type axial variable displacement piston pump manufactured by NACHI. Featuring an integrated pilot pump, it is widely used in 4–6 ton class mini-excavators, including models such as the Komatsu PC40, Hitachi EX40/ZX40, Yuchai YC35, Sunward SWE45, and Kobelco SK40. As the primary hydraulic power source for these excavators, it drives and controls functions such as the boom, arm, bucket, swing, and travel.

We offer brand-new pumps, refurbished units, and a comprehensive range of internal components—including cylinder blocks, valve plates, piston shoes, servo pistons, drive shafts, and swashplates. Every pump undergoes rigorous pressure and load testing before leaving our facility, ensuring excellent sealing, stable flow output, low noise levels, and superior impact resistance. Designed with load-sensing control, this series enables smooth, simultaneous multi-function operation and is built to withstand the demanding, heavy-duty conditions of construction sites.

Guangzhou Xinjiafeng Parts specializes in the supply, repair, and refurbishment of main hydraulic pumps, swing drives, travel drives, and control valves for excavators.

The hydraulic pump is a critical component in heavy machinery. Regular maintenance extends its service life and ensures normal machine operation. Follow the steps below for proper hydraulic pump maintenance.

1. Check for leaks: Inspect the hydraulic pump regularly for leaks, including pipes, joints, and connections.
2. Replace the filter element: Replace the filter element regularly to ensure the cleanliness of the hydraulic oil.
3. Check the oil: Regularly check oil quality and oil level, and replace or replenish the hydraulic oil in time.
4. Lubrication: Add lubricating oil to the lubrication points regularly to ensure normal operation.
5. Regular inspection: Check various parameters and working conditions according to the operation manual.

• Before performing maintenance, disconnect the power supply and wait for the hydraulic system to cool.
• Use hydraulic oil of the specified model and specifications. Never mix hydraulic oil of different brands.
• If the pump operates abnormally or makes unusual noises, stop it immediately and have it inspected by a professional technician.