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Pilot Pump K3V140 for DH280 R290 EC290 SY365 Large Hydraulic Excavators

Pilot Pump
December 22, 2025
Category Connection: Pilot Pump
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Tags:
#external gear pump #excavator pilot pump #hydraulic pilot pump
Brief: Join us for a close-up look at the K3V140 pilot pump and see it in action. This video provides a detailed walkthrough of how this external gear pump operates as the control signal source for large hydraulic excavators. You'll learn about its integration with K3V series main pumps, its role in enabling precise excavator control, and discover its compatibility with various 30-ton excavator models from brands like Doosan, Caterpillar, and Volvo.
Related Product Features:
  • Fixed displacement external gear pump design ensures continuous and stable low-pressure oil flow output.
  • Directly driven by the engine via through-drive spline shaft for reliable power transmission.
  • Provides pilot control hydraulic pressure for joystick valves, multi-way valve control, and main pump regulation.
  • Specifically designed for medium to large hydraulic excavators around 30 tons in weight class.
  • Compatible with Kawasaki K3V140 main pump in negative flow control systems.
  • Features involute spur gears with 13 teeth and 1 module for efficient operation.
  • Optimized operating speed range of 1500-2500 rpm with capability up to 2800 rpm.
  • Low failure rate design with volumetric efficiency exceeding 92% for agricultural equipment reliability.
FAQs:
  • What excavator models is the K3V140 pilot pump compatible with?
    The K3V140 pilot pump is compatible with various 30-ton class excavators including Doosan DH280-DH320, Caterpillar R290-R335, Volvo EC290-EC360, Hyundai SK200-SK260, and Sumitomo SY235-SY365 models.
  • How does the K3V140 pilot pump work in hydraulic excavator systems?
    The pump operates as an external gear pump where meshing gears create vacuum for oil suction and pressure for discharge. It supplies pilot oil that acts as control signals for joystick valves, multi-way valve control, and main pump regulation, enabling precise flow control and responsive excavator operation.
  • What maintenance is required for the K3V140 pilot pump?
    Regular inspection every 2000 hours is recommended to check gear end face clearance, tooth flank clearance, and internal leakage. Immediate replacement of worn gears is necessary, and when replacing the pump, it's advised to also check/replace the pilot oil circuit filter and hydraulic oil to prevent damage from old impurities.
  • What are the key technical parameters of the K3V140 pilot pump?
    The pump comes in 10mL/r and 15mL/r displacement models, operates at 3.5MPa rated pressure (5MPa pull pressure), with optimal speed of 1500-2500 rpm and speed range of 800-2800 rpm. It features 13-tooth involute spline with 1 module and 20° pressure angle.
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