Kubota KX121-3 KX121-3S Main Hydraulic Pump PSVL-42CG B0610-42002 B0610-42003 KYB KAYABA Piston Pump for Mini Excavator

1.Basic Info

• Product: KYB Kayaba PSVL‑42CG Original Main Hydraulic Piston Pump
• OEM Numbers: B0610‑42002, B0610‑42003, D118‑61112, RD118‑61111, RD118‑61115, RD118‑61113, RD118‑61114, PSVL‑42CG
• Compatible Models: Kubota KX121‑3, KX121‑3S Mini Excavator
• Application: Mini Excavator Hydraulic System Spare Parts
• Condition: Original New
• Note: Integrated unit with built‑in pilot gear pump, load‑sensing control assembly

2.Core Advantages

• Genuine KYB Kayaba OEM pump with factory‑calibrated load‑sensing control for Kubota 5‑ton mini excavator
• Integrated pilot gear pump removes need for separate pilot pressure source, keeps compact pump‑housing layout
• Precision‑ground piston & cylinder block assembly delivers stable flow during mixed multi‑function operations
• Exact port, spline and mounting footprint, direct replacement without modifying engine connection or piping

3.Technical Data

• Pump Type: Variable displacement axial piston pump with integrated pilot gear pump
• Function: Main hydraulic power supply for boom, arm, bucket, travel and slewing circuits; pilot pressure generation
• Manufacture: KYB (Kayaba)
• Displacement: 42 cc/rev
• Working Medium: Anti‑wear hydraulic oil ISO VG46
• Rated Working Pressure: 24.5 MPa
• Max Instant Peak Pressure: 27.0 MPa
• Control Mode: Load‑sensing LS control with horsepower limiting function
• Max Input Rotating Speed: 2500 rpm
• Pilot Pump Output: Integrated gear pump for pilot circuit
• Mounting Interface: Original spline shaft, bolt pattern and housing mating dimension for KX121‑3 engine installation
• Port Layout: OEM suction, pressure and pilot port thread and positioning
• Bench Test Items: Displacement calibration, LS control response test, pressure holding, internal leakage, noise inspection
• Weight: 57kg approx

4.FAQ

Q1: Does this pump include the LS control valve and built‑in pilot gear pump?

A1: Yes, complete assembly including LS control group and integrated pilot gear pump as original specification.

Q2: What pre‑commissioning steps are required after pump fitting?

A2: Flush hydraulic tank and circuit, replace all hydraulic filters, bleed air from pump before full‑load operation.

Q3: What are common symptoms for worn PSVL‑42CG main pump?

A3: Slow combined movements, loss of digging power, abnormal pump noise or high‑temperature hydraulic oil.