Kawasaki K5V200 KYB950 Hydraulic Main Pump | Axial Piston Double Pump Assembly Compatible with Kobelco SK460 Vol.vo EC460 Hitachi ZX450 Excavators

We supply high-capacity, heavy-duty Kawasaki K5V200 and KYB950 axial piston hydraulic main pumps precision-engineered as direct aftermarket replacement units. This 200cc double tandem piston main pump is direct-fit compatible with Kawasaki K5V200 and KYB950 configurations widely operating on 40 to 50-ton heavy mining excavators, including Kobelco SK400-8 / SK420 / SK460-8, Vol.vo EC460 / EC480, Hitachi EX450 / EX470 / ZX450 / ZX470, Hyundai R455 / R480 / R485, and Cater.pillar CAT349D / 349E. Built to 350 bar continuous pressure specifications, our main pumps deliver maximum hydraulic power, smooth multi-function flow control, and exceptional swashplate life in high-tonnage quarry and mining operations.

• Mining & Quarry Excavation: Primary hydraulic power source for 40-50 ton excavators carrying heavy 2.5–3.2 m³ digging buckets.
• Heavy Demolition & Rock Crushing: Maintains high system pressure under sudden hydraulic surges from 4–5 ton breaker hammers and shears.
• Mass Earthmoving & Bulk Material Handling: Delivers rapid, dual-pump combined flow for continuous boom lifting, stick crowding, and swing cycles.
• Extreme Thermal Environments: Heavy-duty swashplate metallurgy and heat-treated piston slippers prevent fluid bypass in extreme summer ambient heat.

To assist equipment engineers and fleet service managers in diagnosing hydraulic failure, below is a troubleshooting breakdown for common K5V200 hydraulic pump issues:

• Loss of Hydraulic Pressure & Weak Digging Force: Caused by worn swashplate friction surfaces, piston shoe scuffing, or cylinder barrel face wear in K5V200 units on 45-ton excavators. Installing a new main pump assembly restores factory digging torque.
• Slow Boom, Stick, or Bucket Travel (Flow Lag): Linked to sticking hydraulic regulator spools, worn swashplate feedback linkages, or pilot control pressure drops.
• Abnormal Cavitation Knocking & Pump Vibration: Triggered by air entering suction lines, clogged reservoir suction strainers, or excessive main drive shaft bearing clearance.
• Hydraulic Fluid Overheating & Thermal Pressure Drop: Caused by severe internal oil recirculation across worn valve plates inside the pump body under high operating loads.
• Extensive Hydraulic Leakage & Shaft Seal Failure: Resulting from blown shaft oil seals, hardened housing O-rings, or high drain case back-pressure.

A: Yes. The Kawasaki K5V200 / KYB950 hydraulic main pump assembly matches standard SAE mounting flanges, drive shaft spline dimensions, and hydraulic regulator ports. It is 100% direct-fit compatible with Vol.vo EC460, Kobelco SK460, and Hitachi ZX450 excavators.

A: The K5V200 is a swashplate axial piston pump with 200 cm³/rev displacement per section, rated pressure of 34.3 MPa (350 bar), peak pressure of 39.2 MPa (400 bar), and maximum speed up to 2,200 RPM.

A: On heavy 45-ton excavators, partial rebuilds often fail prematurely due to micro-cracks in worn pump casings. Installing a complete, factory bench-tested pump assembly ensures immediate 350-bar performance and avoids costly field downtime.