K3V112DT Hydraulic Pump

The Kawasaki K3V112DT-HNOV hydraulic pump assembly is a professional core component jointly developed by Doosan and Kawasaki, specially designed for 20-30 ton medium-sized construction machinery, integrating advanced negative flow control technology and high-efficiency integrated design. It boasts ultra-wide compatibility, covering mainstream models of Doosan, Hyundai, SANY, Sumitomo, Liugong and Kato, with perfect pressure parameters, high-efficiency operation performance and standardized flexible installation design, fully meeting the needs of high-intensity engineering operations. With high overall and volumetric efficiency, low energy consumption and fuel consumption, as well as simple maintenance and strong environmental adaptability, it is an ideal replacement and upgrade choice for 20-30 ton excavator hydraulic system maintenance, effectively solving common faults such as weak action, slow response, pressure loss and high fuel consumption, providing stable and efficient hydraulic power support for various engineering construction projects.

Advanced Negative Flow Control Technology

Adopting professional Negative Flow Control technology, a core highlight of this pump, it can achieve stepless flow variation by accurately adjusting the swashplate angle, perfectly matching the real-time load demand of the excavator. Unlike ordinary fixed flow pumps, it automatically adjusts output flow according to actual operation needs, avoiding ineffective energy loss and hydraulic oil waste, greatly improving the overall energy utilization rate of the equipment, reducing engine load and fuel consumption during daily operation, and cutting long-term operating costs for construction teams.

Perfect Pressure Performance for Heavy-Duty Work

With outstanding pressure parameters, it is fully capable of high-intensity excavation and hoisting operations: continuous working pressure reaches 34.3 MPa, stable and durable for long hours of continuous heavy load work, no pressure attenuation or weak movement; peak pressure up to 39.2 MPa, allowing short-term overload operation, effectively coping with sudden heavy loads and complex working conditions such as hard rock excavation, preventing pump body damage caused by instantaneous pressure surge, enhancing the safety and stability of the entire hydraulic system.

High-Efficiency Integrated Pilot Gear Pump

Equipped with a built-in 10 mL/r professional pilot gear pump, which can stably provide 4 MPa pilot pressure, specially used to control the multi-way valves and actuators of the excavator. This integrated design eliminates the need for additional external pilot pump installation, simplifies the overall layout of the hydraulic system, reduces pipeline connections and potential leakage points, and makes the equipment structure more compact. At the same time, it ensures sensitive and accurate response of each action of the excavator, no lag or delay, and improves operation precision and work efficiency.

High Efficiency & Low Energy Consumption Design

With excellent efficiency performance, the overall efficiency reaches ≥88% (typical value), and volumetric efficiency ≥94%, far exceeding ordinary aftermarket hydraulic pumps. The high-precision machining of core components and optimized internal structure reduce internal friction and oil leakage to the greatest extent, maximizing power transmission efficiency. The high volumetric efficiency ensures stable oil absorption and output, avoiding flow loss, making the excavator move more smoothly and powerfully, while reducing heat generation of the hydraulic system and prolonging the service life of hydraulic oil and components.

Standardized & Flexible Installation Design

Adopting international standard installation specifications, the installation flange complies with ISO 3019-2 standard, with bolt hole center distance of 220 mm×180 mm, suitable for compact hydraulic system layout of 20-30 ton excavators, easy to install and dock with the original equipment. The input speed range is 1600-2200 rpm, matching 70-130 kW engine power range, with strong adaptability to different brand engines. The drive shaft adopts SAE B spline (module 3, number of teeth 18), and can be equipped with customized couplings for special models, covering more equipment adaptation needs.

Strict Oil Compatibility & Low Maintenance Demand

Compatible with conventional ISO VG46 anti-wear hydraulic oil (also supports Kawasaki original K3V series special oil), with a wide applicable oil temperature range of -20℃ to +90℃, adapting to different climate and working environment conditions, no need for special customized oil, reducing use and maintenance costs. It has clear cleanliness requirements (NAS grade 8), only needs to equip the suction pipe with a filter element with filtration accuracy ≤25μm for routine maintenance, simple maintenance steps, low technical threshold, reducing downtime caused by maintenance and improving equipment utilization rate.