KYB (Kayaba) PSVD2 series hydraulic main pump

Model Specification Table

Model	Structure Type	Displacement (cc/rev)	Rated Pressure (MPa)	Max Pressure (MPa)	Speed Range (rpm)	Suitable Ton Range	Typical Application Models
PSVD2-42	Variable displacement piston pump	Approx. 42	25–28	31	1500–2500	6–8 tons	Kubota KX series, LiuGong CLG906, etc.
PSVD2-27E	Dual variable piston pumps + dual gear pumps	Dual pumps approx. 26.9×2	24.5	24.5	1500–2500	5–6 tons	Yanmar VIO60, Kubota KX60, etc.
PSVD2-21E/21E-22/21E-35	Variable piston pump + fixed displacement gear pump	Approx. 21	24.5	24.5	1500–2500	4–5.5 tons	Yuchai YC35, LiuGong CLG904, Sunward SWE40, etc.
PSVD2-13E	Variable displacement piston pump	Approx. 13	24.5	24.5	1500–2500	2–3 tons	Hitachi EX20/EX30, Sany SY35, etc.

Q: What are the key technical features?

Precise variable displacement control: Adopts swash plate structure + servo regulator, which automatically adjusts displacement according to load, matches engine power, avoids overload, and achieves energy saving and high efficiency.
High-pressure and durable design: Core pressure-bearing components (valve plate, slipper, cylinder block) use high-strength wear-resistant materials. Max pressure reaches 31 MPa (PSVD2-42), suitable for continuous heavy-duty operation.
Multi-pump & multi-circuit: Some models (such as 27E) integrate dual variable piston pumps + dual gear pumps, which can drive multiple actuators including boom, arm, travel, swing, and hydraulic breaker simultaneously to meet complex working demands.
Solenoid extended functions: Models with suffixes -12, -22, -35 are equipped with built-in solenoid valves, supporting travel speed switching, boom priority, flow combining and other functions to improve operation flexibility.
Standardized installation: Direct connection with engine flywheel housing, high coaxial drive efficiency, universal mounting interfaces, easy replacement and maintenance.

Q: What equipment does it fit?

Hydraulic Pump/