KYB PSVD2 Piston Pump | PSVD2-17E-20 PSVD2-21E | Mini Excavator Main Pump

LIC Hydraulic proudly offers the KYB PSVD2 Series, the industry-standard main hydraulic pump for mini-excavators. Designed specifically for the 1.5 to 3.5-ton class, the PSVD2 series (such as PSVD2-17E-20 and PSVD2-21E) is a master of integration. It combines two variable displacement axial piston pumps and auxiliary gear pumps into a single, ultra-compact housing. This allows for simultaneous control of multiple functions—travel, swing, and boom—without the need for multiple independent pumps. With specific part numbers like 20640-73245, our units provide 100% original interchangeability, serving as a premium direct-fit replacement for global brands like Yanmar, Kubota, and Takeuchi.

Technical Specifications (Bulleted List)

• Series: PSVD2 / PSVD Series (Integrated Main Pump)

• Models: PSVD2-13, PSVD2-17E, PSVD2-21E

• Configurations: 2 Piston Pumps + 1 or 2 Gear Pumps (Combined)

• Max Operating Pressure: $210\text{ bar}$ ($3000\text{ PSI}$)

• Peak Pressure: $245\text{ bar}$ ($3550\text{ PSI}$)

• Applicable Machine Weight: $1.5$ to $3.5$ Tons

• Interchange Part No: 20640-73245 and related OEM codes.

Key Technical Advantages

• Extreme Space Efficiency: By housing all essential pumping functions in one unit, the PSVD2 simplifies plumbing and reduces the overall footprint, which is critical for the tight engine compartments of modern mini-excavators.

• Integrated Power Compensation: Features built-in logic that adjusts pump output based on engine load, ensuring maximum hydraulic power without stalling the small-displacement diesel engines common in mini-excavators.

• Durability in Harsh Conditions: Despite its small size, the internal pistons and valve plates are crafted from high-fatigue alloys, providing reliable service under the high-frequency cycles typical of utility digging.

• Direct Fit Reliability: Machined to exact OEM tolerances, our PSVD2 pumps guarantee a perfect fit, matching the original hydraulic performance and port orientations.

Application Areas

• Mini Excavators: Primary power source for 1.5 – 3.5t class machines (Yanmar, Kubota, Takeuchi, IHI).

• Compact Loaders: Small-scale loaders requiring multi-circuit control.

• Demolition Equipment: Compact indoor demolition robots and breakers.

Expert Maintenance Tips

• Critical Priming: Prior to startup, you MUST fill the pump case with clean hydraulic fluid through the top case port. Running a PSVD2 pump dry for even a minute will cause permanent internal damage to the piston shoes.

• Thermal Management: Because mini-excavators have smaller oil reservoirs, they are prone to rapid overheating. Ensure the oil cooler is clean; excessive heat will thin the oil and cause the PSVD2 to lose pressure.

• Filtration Vigilance: Piston pumps are sensitive to contaminants. Maintain an ISO 4406 18/16/13 cleanliness level and replace filters strictly according to the 500-hour service interval to prevent premature wear on the valve plates.