PSVD2 Series Hydraulic Piston Pump Replacement | Excavator Main Pump PSVD2-21/27E

Genlu Hydraulic proudly introduces our industrial-grade PSVD2 Series axial piston pumps, specifically engineered for excavator hydraulic applications. Fully compatible with the original PSVD2 technology platform, this series is optimized for the demanding pressure, rapid response, and rugged reliability required by modern hydraulic excavators. We specifically highlight our supply capability for precision-tuned units such as the PSVD2-17E, PSVD2-21, PSVD2-21E, PSVD2-21E-11, and PSVD2-27E.

The PSVD2 series is renowned for its compact integration, elite volumetric efficiency, and superior load-sensing control logic. Genlu guarantees 100% Drop-in Interchangeability across mounting footprints, splined-shaft specifications, port configurations, and control logic compared to original PSVD2 series assemblies. Every pump undergoes 100% full-pressure load and simulated-duty-cycle testing on our digital test benches, certifying rugged, consistent performance for your most critical digging, walking, and rotating operations.

Technical Specifications 

• Product Series: PSVD2 Series Excavator Axial Piston Pump

• Representative Models: PSVD2-17E, PSVD2-21, PSVD2-21E-11, PSVD2-27E

• Nominal Displacement: 17cc/rev, 21cc/rev, 27cc/rev

• Nominal Operating Pressure: 250 bar

• Peak Transient Pressure: 280 bar

• Max Rated Speed: 2000 – 2500 rpm

• Control Type: Constant Power / Load Sensing

• Mounting Style: Flange Mounting (Excavator Standard)

• Shaft Style: Involute Splined Shaft

Key Technical Advantages:

• High-Dynamic Response: Optimized via computational fluid dynamics (CFD) for complex load cycles, allowing for rapid swashplate adjustments that maximize agility during demanding excavation tasks.

• Extended-Life Rotating Group: Valve plates and piston slippers are manufactured from high-strength wear-resistant alloys with vacuum-heat treatment, maintaining elite durability even in suboptimal field-work fluid conditions.

• Energy-Efficient Management: Precise power-allocation logic ensures optimal conversion of engine torque to hydraulic power, boosting breakout force while lowering overall fuel consumption.

• Vibration-Resistant Housing: Cast from reinforced aluminum-silicon alloy, the housing offers superior structural rigidity to absorb high-frequency hydraulic shocks, preventing cracking and seal failure during long-term duty.

Application Areas:

• Excavator Drive Systems: Primary power units for compact and medium-sized hydraulic excavators.

• Precision Hydraulic Transmission: Suitable for engineering machinery requiring precise, load-feedback control.

• System Overhauls: Ideal for restoring and upgrading hydraulic performance in older excavator units.

Expert Maintenance Tips:

• Strict Fluid Cleanliness: Excavator environments are inherently dusty. Maintain ISO 4406 18/16/13 standards and change filter elements every 500-1000 hours to protect critical internal components.

• Pre-fill Before Startup: Always fill the pump housing with clean hydraulic fluid through the top drain port before initial operation. Dry-running will cause catastrophic cavitation and scoring of the precision rotating group.

• Case Drain Monitoring: Regularly monitor the flow from the case drain line. An abnormal increase in leakage indicates internal wear (pistons or valve plate), signaling the need for maintenance before further hydraulic system damage occurs.