PSVD2-17E PSVD2-13E KYB Piston Pump 17cc 25MPa VIO75

Product Overview

The PSVD2-13E, PSVD2-17E, and PSVD2-19E are core models within the KYB PSVD2 series of swashplate-type variable displacement axial piston pumps. The PSVD2 series is a high-efficiency hydraulic pump platform developed by KYB specifically for compact excavators, spanning displacements from 12 to 57 cm³/rev, with a rated working pressure of 24.5 MPa (245 bar) and peak pressure of 27–28 MPa, widely deployed in the main hydraulic systems of 1.8–6 ton class mini excavators.

The PSVD2 series features an integrated structure design, housing dual variable piston pumps (P1+P2), a pilot gear pump (P3), and solenoid valve assemblies within a single casing. The series is renowned for high energy efficiency, low noise, low vibration, and ease of installation and maintenance, serving as the original equipment manufacturer (OEM) hydraulic pump supplier for Yanmar VIO series, Kubota KX series, Hitachi EX series, and other mainstream mini excavators.

Model Code Breakdown (for procurement and engineering reference):

Using PSVD2-17E as example:

• PSVD2: KYB PSVD series variable axial piston pump, 2 = design version identifier

• 17: Theoretical displacement 17 cm³/rev (17 cm³/rev × 2 in dual-pump configuration)

• E: Control type identifier, E = Electromagnetic Control, with integrated proportional solenoid or on/off solenoid valves for remote control of pump displacement, pressure, or direction

About PSVD2-13E-3 Configuration: PSVD2-13E-3 is a three-solenoid high-end version with three DC24V solenoid valves integrated on the pump rear cover, providing:

• Solenoid No.1: Cut-off / Idle control valve — de-energized for small pump displacement at idle to reduce fuel consumption and no-load loss; energized for full pump displacement output

• Solenoid No.2: Hydraulic breaker combining valve — energized when fitting a hydraulic hammer to realize double-pump confluence for large flow demand

• Solenoid No.3: Power regulating valve — electronically controlled power adjustment to reduce pump displacement under heavy load to avoid engine stall, and increase displacement under light load to improve operating speed

OEM Cross-Reference (for procurement reference):

• PSVD2-13E: Kubota KX135/KX155 (1.8–3t), Yanmar VIO27/VIO30; OEM part numbers B0600-12003 / B0600-12001

• PSVD2-17E: Yanmar VIO40/VIO45/VIO50/VIO55 series; Kubota KX series; OEM part number B0600-16018

• PSVD2-19E: Compatible with 3.5–5 ton mini excavators

Drop-in Replacement Advantage: Manufactured to exact KYB OEM specifications, these pumps achieve complete drop-in interchangeability with the original PSVD2 series for SAE J744 mounting flange, 13T splined shaft (pitch circle diameter 20.6375 mm), SAE standard port layout, and solenoid valve control interface. Every pump undergoes 100% simulated load testing prior to shipment, validating 24.5 MPa pressure loading, load sensing response, and volumetric efficiency under conditions replicating real-world duty cycles.

Technical Specifications 

Model PSVD2-13E:

• Model Code: PSVD2-13E (Three-solenoid version: PSVD2-13E-3)

• Series: KYB PSVD2 Series (Swashplate-Type Dual Variable Axial Piston Pump)

• Dual Pump Displacement (P1/P2): 13.1 cm³/rev × 2

• Rated Working Pressure: 24.5 MPa (245 bar / 3553 psi)

• Peak Pressure: 27 MPa (270 bar / 3916 psi)

• Maximum Allowable Speed: 2550 rpm

• Standard Operating Speed: 2200–2400 rpm

• Maximum Input Torque: 60 N·m

• Matched Engine Power: 30–35 HP diesel engine

• Control Type: LS load sensing + power displacement control + three-solenoid electronic flow regulation

• Solenoid Specifications: DC24V, DIN43650 connector, IP65 protection grade

• Mounting Flange: SAE J744 standard flange

• Shaft: 13T splined shaft (pitch circle diameter 20.6375 mm, module 13, pressure angle 30°)

• Suitable Excavator Tonnage: 1.8–3 t

• Recommended Fluid: ISO VG46 anti-wear mineral hydraulic oil

• Operating Temperature: -20°C to +85°C

• Fluid Cleanliness: NAS Class 8–9

Model PSVD2-17E:

• Model Code: PSVD2-17E

• Series: KYB PSVD2 Series (Swashplate-Type Dual Variable Axial Piston Pump)

• Theoretical Displacement: 17 cm³/rev (adjustable range: 0–17 mL/rev)

• Dual Pump Displacement (P1/P2): Approx. 17.2 cm³/rev × 2

• Pilot Gear Pump Displacement (P3/P4): Approx. 14.5 cm³/rev + 4.5 cm³/rev

• Rated Working Pressure: 24.5 MPa (245 bar / 3553 psi)

• Peak Pressure: 27–28 MPa (270–280 bar / 3916–4060 psi, short-term allowable)

• Maximum Speed: 2500–2550 rpm

• Rated Speed: 1800–2200 rpm

• Minimum Speed: 600 rpm

• Maximum Flow (dual pump combined, 2200 rpm): Approx. 37.8 L/min × 2 + 31.9 L/min + 9.9 L/min

• Volumetric Efficiency: ≥92% (standard conditions)

• Total Efficiency: ≥88%

• Control Type: Pressure compensation/flow control (solenoid-adjusted)

• Response Time: ≤50 ms (from solenoid signal to displacement change)

• Mounting Flange: SAE J744 standard flange

• Shaft: 13T splined shaft (pitch circle diameter 20.6375 mm, module 13, pressure angle 30°)

• Suitable Excavator Tonnage: 3.5–5 t

• Weight: Approx. 28 kg

Model PSVD2-19E:

• Model Code: PSVD2-19E

• Series: KYB PSVD2 Series (Swashplate-Type Dual Variable Axial Piston Pump)

• Theoretical Displacement: Approx. 19 cm³/rev

• Dual Pump Displacement: Approx. 19 cm³/rev × 2

• Rated Working Pressure: 24.5 MPa (245 bar / 3553 psi)

• Peak Pressure: 27 MPa (270 bar / 3916 psi)

• Maximum Speed: 2500 rpm

• Control Type: Load sensing + power control (solenoid-adjusted)

• Mounting Flange: SAE J744 standard flange

• Shaft: 13T splined shaft

• Suitable Excavator Tonnage: 3.5–5 t

PSVD2 Series Displacement Size Reference:

• PSVD2-12E: 12 cm³/rev × 2, max speed 2550 rpm, weight approx. 24 kg

• PSVD2-13E: 13.1 cm³/rev × 2, max speed 2550 rpm, 1.8–3 t, weight approx. 26 kg

• PSVD2-16E: 16 cm³/rev × 2, max speed 2550 rpm, 3–4 t

• PSVD2-17E: 17.2 cm³/rev × 2, max speed 2550 rpm, 3.5–5 t, weight approx. 28 kg

• PSVD2-19E: 19 cm³/rev × 2, max speed 2550 rpm, 3.5–5 t

• PSVD2-21E: 21 cm³/rev × 2, max speed 2400 rpm, 5–6 t

• PSVD2-26E: 26 cm³/rev × 2, max speed 2400 rpm, 5–6 t

• PSVD2-27E: 27 cm³/rev × 2, max speed 2400 rpm, 6 t, weight approx. 36 kg

• PSVD2-57E: 57 cm³/rev × 2, 8 t and above

Key Technical Advantages

1. Integrated Dual-Pump Shared Body Design with Compact Installation
The PSVD2 series employs an integrated structure design, housing dual variable piston pumps (P1+P2), a pilot gear pump (P3/P4), and solenoid valve assemblies within a single casing. This integrated design significantly reduces the number of piping connection points, lowering leakage risk and system complexity, perfectly fitting the extremely compact engine compartments of mini excavators. The mounting envelope is optimized, and the SAE J744 standard flange and 13T splined shaft interface require no adaptation for replacement, reducing installation time by approximately 40%.

2. LS Load Sensing with Power Control Composite Regulation
The PSVD2 series is based on load sensing (LS) and power displacement control as fundamental control methods. The LS controller automatically adjusts pump displacement by sensing the pressure differential across the system throttle valve, enabling the pump to deliver only the flow actually required by the actuators while maintaining constant throttle pressure drop for on-demand flow delivery. The power control function automatically reduces pump displacement as system pressure rises, maintaining pump input power within the engine’s available power range and effectively preventing engine bogging under heavy digging loads. The response time of ≤50 ms ensures rapid displacement adjustment under load transients.

3. Three-Solenoid Electronic Flow Regulation with Intelligent Control
The PSVD2-13E-3 is equipped with three DC24V solenoid valves for intelligent flow control: the cut-off/idle control valve reduces pump displacement at idle to lower fuel consumption; the hydraulic breaker combining valve enables double-pump confluence for large flow demand when a hydraulic hammer is fitted; the power regulating valve reduces displacement under heavy load to prevent engine stall and increases displacement under light load to improve operating speed. The solenoids use DIN43650 standard connectors with IP65 protection grade, adapting to harsh excavator operating conditions.

4. High Efficiency with Low Noise Operation
The PSVD2 series employs a swashplate axial piston rotary group design with an axial and radial clearance automatic compensation mechanism that maintains ≥90% volumetric efficiency even after 5,000 operating hours. High hydraulic system efficiency directly reduces power consumption and system heat generation. Low starting torque design enables smooth operation at extreme temperatures (-10°C to 60°C). Helical gear teeth and vibration-dampening housing design keep noise below 75 dB at full load.

5. High-Strength Materials with Long Service Life
The pump body utilizes high-strength aluminum alloy combined with alloy steel gears, with pistons and cylinder bores precision match-ground to micron-level clearances. The valve plate employs precision lapping with optimized pre-compression and pre-decompression angles, maintaining stable volumetric and mechanical efficiency at 24.5 MPa continuous pressure. Precision dimensional tolerance controlled at ±0.02 mm ensures complete compatibility with original equipment.

6. Wide Hydraulic Fluid Compatibility with Broad Temperature Adaptability
The PSVD2 series is compatible with ISO VG46 anti-wear mineral hydraulic oils, with an operating temperature range of -20°C to +85°C and fluid cleanliness requirements of NAS Class 8–9. The seal material is NBR (nitrile rubber), with standard configuration suitable for mineral oil-based hydraulic fluids. The series is compatible with multiple mini excavator brands and models, including Yanmar VIO series, Kubota KX series, Hitachi EX series, and Sany SY series, with extensive interchangeability.

Application Areas

• Mini Excavators (1.8–3 t): PSVD2-13E compatible with Kubota KX135/KX155, Yanmar VIO27/VIO30, Hitachi EX20/EX30, Sany SY35

• Small Excavators (3.5–5 t): PSVD2-17E/19E compatible with Yanmar VIO40/VIO45/VIO50/VIO55 series, Kubota KX series

• Compact Excavators (5–6 t): PSVD2-21E/27E compatible with Yanmar VIO70/VIO75, Kubota KX series

• Skid Steer Loaders: Small skid steer loader hydraulic systems

• Municipal Maintenance Equipment: Small street sweepers, municipal maintenance machinery hydraulic drives

• Agricultural Machinery: Small agricultural excavators, orchard management machinery hydraulic systems

• Landscaping Equipment: Mini excavators, landscaping machinery hydraulic power sources

Expert Maintenance Tips

1. Pre-Start Pump Housing Priming (Mandatory)
Before starting the engine, manually pre-fill the main pump casing with clean hydraulic oil through the drain port. Operating an axial piston pump bone-dry — even for a few seconds — will cause the piston shoes to “weld” to the swashplate instantly, causing irreversible damage. After installation, turn the drive shaft by hand several revolutions to confirm free rotation without binding.

2. Air Bleeding & Initial Startup Procedure
After installation, loosen the air bleed plug on top of the pump housing. Crank the engine with the fuel supply disabled until a steady stream of oil (no bubbles) flows from the port, then retighten. Allow the machine to idle under no load for 10 to 15 minutes to purge any trapped air from the hydraulic loop.

3. System Fluid Decontamination
If replacing a pump that suffered internal mechanical failure, completely drain and clean the hydraulic oil reservoir, flush all circuit lines, and clean the oil cooler. Replace all return and suction filter elements before starting the engine. System fluid cleanliness for the PSVD2 series must meet NAS Class 8–9 requirements, with ISO VG46 anti-wear mineral hydraulic oil recommended.

4. Solenoid Valve Maintenance and Inspection
The PSVD2-13E-3 is equipped with three DC24V solenoid valves. Regularly inspect the solenoid electrical connectors for looseness, moisture, or corrosion. Verify solenoid coil resistance and response every 2,000 operating hours. The solenoids use DIN43650 standard connectors with IP65 protection grade; use identical specification connectors when replacing to ensure sealing performance.

5. Power Controller Setting and Adjustment
The PSVD2 series power controller should be calibrated according to the engine’s power characteristics. During commissioning, set the power control start point with the pump at neutral (zero displacement). The power control setting must ensure that the system does not exceed the engine’s available power at maximum working pressure (30–35 HP diesel engine corresponding to maximum input torque of 60 N·m), preventing engine stall under heavy load conditions. Adjust only with the system at zero load. Rotate the adjustment screw slowly.

6. Hydraulic Fluid Replacement Interval
Replace hydraulic fluid every 1,000–3,000 operating hours or every 6 months, whichever comes first. Recommended fluids are ISO VG46 anti-wear mineral hydraulic oils. When changing hydraulic fluid, simultaneously replace filter elements and flush the system to ensure no residual contaminants remain. Monitor oil temperature during operation, ensuring it does not exceed 85°C.