K3V63DT-9C0S Hydraulic Main Pump for Sumitomo SH120 Case CX130 Excavator Piston Pump

Product Overview:
The K3V63DT-9C0S 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 63 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 excavators from Hyundai, JCB, Doosan, and other major brands.

Technical Specifications:

• Model: K3V63DT-9C0S

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

• Displacement: 65 cm³/rev (per pump)

• Rated Pressure: 34.3 MPa (approximately 350 bar / 5000 psi)

• Maximum Pressure: 39.2 MPa (approximately 400 bar / 5700 psi)

• Maximum Self-Priming Speed: 2,650 rpm

• Maximum Speed: Up to 2,700 rpm

• Flow Rate: Up to 173 L/min (per pump at max speed)

• Control Options: Negative flow control (standard for most excavators)

• 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 48-55 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 .

• 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 .

• High-Pressure Capability: Delivers 34.3 MPa rated and 39.2 MPa peak pressure (approximately 350-400 bar), meeting the most demanding excavator application requirements .

• Excellent Suction Characteristics: Superior self-priming performance (up to 2,650 rpm) ensures reliable operation even in demanding conditions and at higher speeds, minimizing cavitation risks .

• Through-Shaft / PTO Capability: The through-shaft design eliminates the need for a separate transmission system, resulting in improved efficiency and reduced power loss. It also allows for the connection of additional hydraulic components, such as pilot gear pumps .

• Durability: High-quality materials and stringent quality control processes ensure long service life in demanding continuous operation. Advanced sealing technology prevents internal leakage and minimizes wear and tear .

• Proven Reliability: With more than 25 years of experience in mobile applications, the K3V series offers field-proven performance and high reliability in demanding construction environments .

• Negative Flow Control: Standard negative flow control system provides excellent fuel efficiency and smooth operation, making it ideal for excavator applications .

• Compact Design: Compact dimensions allow for easy installation and integration into excavator systems.

Main Applications (Suitable Equipment):
The K3V63DT-9C0S is widely recognized as the specialized tandem power unit for medium-sized excavators and heavy machinery. It is extensively used in:

1. Excavators (13-16 Ton Class - Primary Application):

• Hyundai excavators: R140LC-7, R150-7, R150LC-7

• JCB excavators: JS130, JS160

• Doosan / Daewoo excavators: DH150-7, DX140, DX160

• R160 excavator series

• Kobelco excavators: SK135, SK140

• CAT excavators: 312B, 312C

• Volvo excavators: EC140

• Komatsu, Hitachi, Sumitomo, and other brands

2. Construction Machinery:

• Backhoe loaders and compact loaders

• Skid steer loaders and material handlers

• Crawler drills and foundation equipment

3. Industrial Applications:

• Industrial hydraulic power units for machinery

• Machine tools and heavy equipment

4. Specialty Applications:

• Rotary drilling rigs - auxiliary functions

• Agricultural machinery and harvesters

• Marine and offshore hydraulic systems