Hitachi ZX800 Main Pump | K3V280, K3V180DTH, K3V63DT | Part 4447599, 48290003 | Kawasaki Hydraulic Pump

Kawasaki K3V Series Hydraulic Main Pump for Hitachi ZX800 Excavators

Product Overview: The Kawasaki K3V series serves as the vital power source for heavy-duty excavator hydraulic systems. For mining-class machines like the Hitachi ZX800, this series offers ultra-high displacement options such as the K3V280 (model K3V280SH140L-OE41-V) and high-performance tandem pumps like the K3V180DTH. These pumps, corresponding to Hitachi part numbers 4447599 and 48290003, are engineered for extreme mining and construction duty cycles. Featuring advanced Negative Flow Control (NFC) and power-limiting technology, the K3V series ensures precise power distribution and significant fuel efficiency during deep digging and heavy-load swinging operations.

Key Technical Advantages:

• Heavy-Duty Mining Durability: Optimized for massive machinery like the ZX800, with reinforced internal support bearings and piston groups to maintain extended service intervals under rated pressures of 34.3 MPa.

• Superior Volumetric Efficiency: Precision-lapped valve plates and cylinder block components minimize internal leakage at high pressures, ensuring no loss of digging force under extreme loads.

• Precise Control Logic: Supports Hitachi-specific regulators for instantaneous displacement switching, enhancing multi-function smoothness and preventing engine stalling.

• Excellent Suction Characteristics: Specially designed internal passages prevent cavitation even during high-speed operation of ultra-large displacements (280cc), protecting the pump core.

• 100% OEM Standard Compatibility: Manufactured to strict Hitachi and Kawasaki factory specifications, ensuring splined shafts, mounting flanges, and regulator interfaces align perfectly for a seamless “drop-in” replacement.

Detailed Models & Parameters:

• Core Series: Kawasaki K3V Series (K3V63, K3V112, K3V180, K3V280).

• Representative Models: K3V280SH140L-OE41-V, K3V180DTH19XL-ZP11, K3V63DT-12MR-9N2D.

• Key OEM Part Numbers: 4447599, 48290003.

• Compatible Machines: Hitachi ZX800, ZX850, ZX870, and other 80+ ton heavy excavators.

• Pressure Ratings: Rated at 34.3 MPa (5000 PSI) continuous; Peak capability up to 39.2 MPa.

• Displacements: Ranging from 63cc, 112cc, 180cc up to 280cc/rev per section.