K3V140 K3V140DT 31N8-10010 14575661 Kawasaki Hydraulic Main Pump for Hyundai R290LC-7 Vol.vo EC290B Komatsu PC300 Excavator

We supply genuine-spec and high-performance aftermarket K3V140, K3V140DT, and K3V140DTP Kawasaki axial piston hydraulic main pump assemblies (OEM Part Numbers: 31N8-10010, 31N8-10011, 31N8-10020, 14575661, VOE 14521441, 708-2L-00112). This 140cc variable displacement swashplate double tandem piston main pump is direct-fit compatible with Kawasaki K3V140 hydraulic systems operating on 28 to 35-ton heavy construction excavators, including Hyundai R290LC-3 / R290LC-7 / R300LC-7 / R305LC-7, Vol.vo EC290B / EC290C / EC300D / SE280, Doosan Solar 290LC-V / DH280LC, Komatsu PC300-7, and Kobelco SK330-6. Built to 35 MPa (350 bar) continuous operating pressure, our hydraulic main pumps feature high volumetric efficiency, precise flow regulators, and long swashplate wear life under heavy digging conditions.

• 28–35 Ton Heavy Digging & Trenching: Primary main hydraulic pump unit for 30-ton class excavators operating in deep trenching, quarry excavation, and mass earthmoving.
• Demolition & Breaker Attachment Works: Rapid regulator flow response handles sudden shock pressure spikes from 3–4 ton hydraulic breaker hammers and pulverizers.
• Road Building & Foundation Construction: Dual tandem piston pumps deliver high combined flow rate for smooth simultaneous boom, arm, and bucket control.
• High Temperature Summer Jobsite Operations: Heavy-duty swashplate metallurgy and precision piston slippers prevent internal fluid bypass during intense ambient heat.

To assist site mechanics and hydraulic repair engineers in diagnosing pump performance drops, below is a troubleshooting reference for common K3V140 / K3V140DT hydraulic pump failures:

• Loss of Hydraulic Power & Slow Boom Lifting (Main Pump Wear): Frequently caused by worn swashplate slipper faces, cylinder barrel face scuffing, or piston shoe clearance in K3V140 units on Hyundai R290LC or Vol.vo EC290 excavators. Replacing the hydraulic main pump restores 35 MPa digging force.
• Sluggish Multi-Function Operation (Flow Response Lag): Linked to sticking hydraulic regulator spools (negative flow control valves), worn swashplate feedback linkages, or pilot control pressure drop.
• Abnormal Cavitation Knocking & Hydraulic Vibration: Triggered by air entering the main pump suction line, restricted hydraulic oil return filters, or worn drive shaft support bearings.
• Hydraulic Oil Overheating & Thermal Power Fading: Caused by severe internal fluid recirculation across worn valve plates inside the hydraulic pump casing during sustained operating shifts.
• Extensive Hydraulic Leakage & Shaft Seal Failure: Resulting from hardened front drive shaft oil seals, degraded housing O-rings, or excessive drain line back-pressure.

A: Yes. The K3V140 / K3V140DT hydraulic main pump assembly matches standard SAE mounting flanges, drive shaft spline dimensions, and hydraulic regulator port configurations. It is 100% direct-fit compatible with Hyundai R290LC-7, Vol.vo EC290B, and Doosan Solar 290LC-V excavators.

A: The K3V140 is a swashplate variable displacement axial piston double pump featuring 140 cm³/rev displacement per pump section, 34.3 MPa (350 bar) rated continuous pressure, 39.2 MPa (400 bar) peak pressure, and max self-priming speed of 2,150 RPM.

A: Common OEM cross-reference part numbers include 31N8-10010, 31N8-10011, 31N8-10020, 14575661, VOE 14521441, and 708-2L-00112.