K3V140DT-1GOR Hydraulic Pump for Volvo EC290B EC300 Doosan DX300LC Excavator Main Pump K3V140DT

Product Overview:
The K3V140DT-1GOR is a high-performance swashplate design axial piston tandem (dual) pump from the renowned Kawasaki K3V series. Specifically engineered for open circuit hydraulic systems, this variable displacement double pump delivers exceptional power density, reliable operation, and precise control under extreme loads . With a total displacement of 140 cm³/rev (per pump) and robust construction, it provides stepless flow adjustment for demanding mobile applications. With over 25 years of proven field experience, the K3V series is recognized for its high reliability in the global construction machinery market . This unit is a direct, high-quality replacement solution for original Kawasaki equipment, widely used in 20-30 ton class excavators and heavy machinery.

Model Code Breakdown:

Technical Specifications:

• Model: K3V140DT-1GOR

• Type: Swashplate design, variable axial piston pump (tandem / dual configuration)

• Displacement: 140 cm³/rev (per pump); up to 171 cm³/rev for certain configurations 

• Number of Pistons: 9 pistons per pump

• Rated Pressure: 34.3 - 38 MPa (approximately 350 - 380 bar / 5000 - 5500 psi) 

• Maximum Pressure: 42.0 MPa (approximately 420 bar / 6100 psi) 

• Maximum Self-Priming Speed: 2,200 - 2,360 rpm

• Maximum Speed: Up to 2,700 rpm

• Flow Rate: Up to 380 L/min (total for both pumps at max speed)

• Maximum Input Torque: Up to 1,067 Nm (with 171 cm³/rev displacement at 42.0 MPa) 

• Control Type: Negative flow control / Total Horsepower Control (TVC) 

• Design: For open circuit hydraulic systems with twin pump configuration

• Mounting Flange: SAE / ISO 3019-1 standard

• Shaft Type: Splined shaft for direct engine coupling

• Port Connection: Side ported with SAE flange ports

• Weight: Approximately 93-100 kg (depending on configuration) 

• Material: Robust cast iron construction with hardened steel components 

• Temperature Range: -20°C to +95°C

Core Features:

• Tandem / Dual Pump Configuration: Two high-performance pumps in a compact, space-saving tandem arrangement, providing independent hydraulic power for multiple machine functions (e.g., boom, arm, bucket, swing) from a single drive source. The two pumps share a common suction port but have independent delivery ports .

• Total Power Control (TVC) System: The revolutionary TVC system in dual-pump configurations ensures the combined output power of both pumps remains consistently near the engine's optimal performance. During compound operations, the system intelligently allocates total power to the pump requiring higher demand, achieving 100% engine utilization and preventing engine overload under heavy-load conditions .

• Efficient Negative Flow Control (NFC): When all control levers are in neutral, the control pressure generated by the main control valve feeds back to the pump regulator, automatically reducing the pump's displacement to the minimum. This significantly reduces energy loss and system heat generated by high-pressure overflow. Once operation begins, the pump's displacement responds instantly to operational demands .

• Robust Swashplate Design: The proven swashplate design with cast iron construction ensures reliable operation, excellent volumetric efficiency (up to 95%), and long service life in open circuit applications. Advanced surface wear-resistant coating technology significantly extends the pump's service life .

• High-Pressure Capability: Delivers up to 38 MPa rated and 42 MPa peak pressure, meeting the most demanding excavator and construction application requirements .

• Excellent Suction Characteristics: Superior self-priming performance ensures reliable operation even in demanding conditions and at higher speeds, minimizing cavitation risks.

• Durability: High-quality materials and stringent quality control processes ensure long service life in demanding continuous operation. Hardened steel components and precision-machined parts withstand heavy loads and harsh environments .

• Low Noise Operation: Unique design features significantly reduce pressure fluctuations that cause noise, ensuring quiet operation meeting stringent workplace noise regulations .

Main Applications (Suitable Equipment):
The K3V140DT-1GOR is widely recognized as the specialized tandem power unit for medium to large-sized excavators and heavy machinery. It is extensively used in:

1. Excavators (20-30 Ton Class - Primary Application):

• Hyundai excavators: R260, R265, R290, R300 series

• Doosan / Daewoo excavators: DX260, DX280, DX300 series

• Kobelco excavators: SK250, SK260, SK280 series

• Volvo excavators: EC240, EC250, EC290 series

• Sany excavators: SY235, SY265, SY285 series

• Komatsu, Caterpillar, Hitachi, Sumitomo, and other 20-30 ton class excavators 

2. Construction Machinery:

• Concrete pump trucks - main hydraulic system power 

• Crawler cranes and rough terrain cranes 

• Wheel loaders and backhoe loaders

• Motor graders and road construction equipment

3. Drilling & Foundation Equipment:

• Rotary drilling rigs

• Crawler drills and pile drivers

• Foundation machinery and trenching equipment

4. Industrial & Specialty Applications:

• Crushers and material processors 

• Aerial work platforms and scissor lifts

• Agricultural machinery (tractors, harvesters)

• Marine and offshore hydraulic systems 

• Mining machinery and heavy industrial equipment