KYB PSVL2-42-V Piston Pump for Kubota KX151 KX155 KX161 KX165

LIC Hydraulic offers the KYB PSVL2-42-V Series, the premier variable displacement piston pump specifically engineered for Kubota KX series mini excavators. As the OEM standard for models such as the KX155 and KX161, this pump features sophisticated Load-Sensing (LS) technology, which optimizes flow based on real-time task demands. The PSVL2-42-V provides the perfect balance of power and precision, ensuring that multi-function movements (boom, arm, and swing) remain smooth and efficient even under heavy load.

Technical Specifications (Quick Reference)

• Model: PSVL2-42-V (Standard 42cc displacement frame).

• Compatibility: Kubota KX151, KX153, KX155, KX161, KX165.

• Control Type: Hydraulic Load Sensing (LS) Control.

• Max Pressure: Continuous operation up to $24.5\text{–}28\text{ MPa}$.

• Construction: High-tensile forged housing with precision-ground internal piston groups.

Key Technical Advantages

• Precision Load Sensing: Automatically adjusts the swashplate angle to match the pressure of the highest load, significantly reducing energy waste and preventing engine stalling.

• Seamless Multi-Functioning: Optimized for the complex valving systems in Kubota excavators, allowing for simultaneous boom and bucket movements without flow starvation.

• Built for Durability: Designed to withstand the high-cycle vibrations and pressure spikes common in 5-ton class excavator operations.

• Direct OEM Fit: Standardized flange and shaft dimensions for a “plug-and-play” installation, minimizing machine downtime.

Application Areas

• Urban Construction: Precise trenching and pipe laying where space is constrained.

• General Excavation: Efficient earthmoving and site preparation for landscaping.

• Attachment Operation: Reliable hydraulic supply for breakers, augers, and thumbs.

Expert Maintenance Tips

• Case Drain Management: Ensure the case drain line is free of obstructions. High case pressure is the primary cause of shaft seal failure in the PSVL2 series.

• Cleanliness Standard: Maintain oil cleanliness at or above ISO 4406 18/16/13. Piston pumps are highly sensitive to microscopic debris which can cause rapid “scoring” of the valve plate.

• First-Start Protocol: Fill the pump case with clean oil through the uppermost drain port before starting the engine. Air trapped in the pistons can lead to cavitation and catastrophic failure during the first few seconds of operation.

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