KYB PSVD2-17E-23 PISTON PUMP Full Specification
1. Product Introduction
PSVD2-17E-23 is an integrated variable Hydraulic piston pump manufactured by Japan KYB, serving as the original main hydraulic pump for 4-5.5 ton mini excavators. It combines main pumping unit, built-in pilot gear pump and electronic proportional solenoid valve in one assembly, supplying main hydraulic power and pilot control oil for the complete machine’s whole hydraulic system. Equipped with LS load sensing & constant horsepower compound control, it automatically adjusts displacement according to working load to stabilize the performance of the entire hydraulic system, widely fitted on Yanmar VIO45/VIO50/VIO55 excavators.
2. Model Definition
- PSVD2: 2nd generation compact piston pump series for mini excavators
- 17: Basic size code with 17cc/rev theoretical displacement
- E: Version with electronic proportional control solenoid
- 23: OEM customized calibration code for Yanmar exclusive use, non-interchangeable with PSVD2-17E-20 general model
3. Construction & Materials
1. Ductile iron heavy-duty pump housing, shock and vibration resistant for harsh construction sites
2. Internal rotating group: 9pcs hardened steel pistons & copper alloy slippers, wear-resistant flat valve plate and swash plate
3. All-in-one structure of main Hydraulic piston pump + side pilot gear pump, simplifying piping layout of the hydraulic system
4. Integrated LS valve, constant horsepower regulator and external electronic proportional solenoid valve
5. JIS standard involute spline drive shaft connected to engine flywheel
4. Technical Parameters
Item Specification
Type Variable Hydraulic piston pump
Displacement 17cc/rev
Rated Continuous Pressure 21MPa
Max Peak Pressure 24.5MPa
Rated Speed 2200rpm
Max Intermittent Speed 2500rpm
Built-in Pilot Pump Displacement 6.8cc/rev
Control System LS Load Sensing + Constant Horsepower + Electronic Proportional Control
Hydraulic Fluid ISO VG46 / VG68 anti-wear hydraulic oil
Operating Temp -20℃ ~ +90℃
Net Weight 35KG
OEM Part No. B0600-16023
5. Working Principle
Driven by engine shaft, the cylinder block and pistons rotate to deliver hydraulic oil. Swashplate angle changes to adjust flow output of the hydraulic pump. LS sensor detects real-time load pressure to optimize pump displacement, and the electronic solenoid receives ECU signals for fine flow regulation. The built-in pilot pump feeds control oil to distribution valves to form a full functional hydraulic system. Constant horsepower limiter prevents engine stall under heavy load and protects the Hydraulic piston pump.
6. Features & Application
1. Compact integrated design reduces pipeline leakage points of the hydraulic system
2. High volumetric efficiency flat valve plate design resists internal leakage and hot power drop
3. Dual hydraulic & electronic control delivers smooth and precise operation for fine working and hammer breaking
4. OEM factory calibrated, plug-and-play replacement without commissioning
