مضخة هيدروليكية Komatsu PC40MR-2 PC50MR-2 708-3S-00522 لـ حفارة صغيرة

Komatsu PC40MR-2 PC50MR-2 Main Hydraulic Pump

1. Product Overview
The Komatsu Axial Piston Hydraulic Pump is a variable displacement unit engineered specifically for the 4-ton and 5-ton Dash-2 mini excavator series. It is a direct replacement for multiple OEM part numbers, including 708-3S-00522, 708-3S-00521, 708-3S-00422, 708-3S-00421, 708-3S-00460, 708-3S-00461, and 708-3S-00462. This pump is designed to integrate seamlessly with Komatsu’s Load Sensing (CLSS) hydraulic logic.

2. Technical Specifications & Performance
Pump Model: HPV Series (Axial Piston Variable Displacement)

Part Numbers: 708-3S-00522, 708-3S-00521, 708-3S-00422, 708-3S-00462

Machine Compatibility: Komatsu PC40MR-2, PC45MR-2, PC50MR-2

Rated Operating Pressure: 26.5 MPa (265 Bar)

Maximum Pressure: 29.4 MPa (294 Bar)

Control System: CLSS (Closed-center Load Sensing System)

Rated Speed: 2,400 – 2,550 RPM

Warranty: 1-Year Quality Guarantee

Lead Time: 3–7 Working Days

3. Key Engineering Advantages
Optimized Power Matching: Calibrated to match the engine torque of the Dash-2 series, ensuring the pump extracts maximum hydraulic horsepower without engine bogging.

Precision Load Sensing: The CLSS integration ensures that hydraulic flow is directed only where needed, allowing for simultaneous travel, swing, and digging with extreme precision.

Compact Durability: Despite the small footprint required for MR chassis, the internal components feature reinforced swashplates and hardened slippers for long-term reliability.

Direct "Drop-in" Fit: Manufactured to original factory tolerances. All mounting pilot diameters, splined shafts, and hydraulic ports are 100% matched to the original Komatsu configuration.

4. Supply Range & Brand Expertise
We specialize in professional-grade components for the world’s leading construction brands:

Hydraulics: Main Pumps, Swing Motors, and Control Valves.

Drivetrain: Final Drive Gearboxes, Travel Motors, and Swing Reducers.

Electronics: ECU Controllers, Digital Monitors, and Sensors.

Extensive Brand Coverage: Komatsu, Hitachi, Volvo, CAT, Liebherr, Hyundai, Kobelco, Kubota, Yanmar, JCB, Sany, and Doosan.

5. Global Logistics & Fast Delivery
Express Shipping: Rapid door-to-door delivery via UPS, DHL, FedEx, and TNT.

Flexible Logistics: Support for Air Freight, Sea Freight, and DDP (Delivered Duty Paid) options to simplify international shipping and customs.

Service Commitment: Worldwide Delivery ensured to minimize equipment downtime and restore your Komatsu fleet to peak productivity.