Use For cat 374F 390F L Excavator Main Control Valve 346-7589 381-1859 346-7570 High Quality Main Control Valve Construction Machinery Aftermarket Parts

This main control valve regulates hydraulic oil flow, direction, and pressure to control excavator functions and operations. Serving as the hydraulic system's core controller, it ensures precise performance across all machine functions.

• System Pressure: Main relief valve setting pressure is 34.3 MPa (350 kg/cm²), suitable for high-pressure hydraulic systems ensuring sufficient power output for loading and material handling operations.
• Structure Type: Slide valve type multi-section main control valve integrating multiple hydraulic control branches including lifting, tilting, and steering circuits.
• Control Method: Equipped with pilot control system for precise hydraulic control of bucket lifting/lowering, arm extension/retraction, and machine steering through pilot joystick.
• Applicable Models: Custom-made for CAT 374F 390F L Excavator, fully matching hydraulic parameters of dedicated hydraulic pumps and actuators.

• Hydraulic System "Brain": Receives operator commands to control flow direction, pressure, and volume
• Primary Function Control: Controls bucket lift/lower, arm extension/retraction, and material handling operations
• Machine Movement Management: Manages steering, travel, and loader attachment functions
• Complex Motion Coordination: Manages multiple actuators simultaneously for smooth, efficient operation

Installation Requirements: Requires flexible coupling with high shaft alignment accuracy (concentricity deviation ≤ 0.1 mm, tilt angle < 1°)

Maintenance Guidelines: System overpressure protection, single-operation overload protection, and prevention of dangerous misoperations

Guangzhou Tieqi Engineering Machinery Co., Ltd. ("IRON CAVALRY") is strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport. With nearly 15 years of specialization in engineering machinery hydraulics, we are driven by core values of "Pragmatism and Progress."

Technical Leadership: In China's excavator hydraulic assembly sector, our efficient execution and rigorous manufacturing approach ensure products meet over 95% of original performance specifications, building widespread trust among clients.

For large items, we use sturdy plywood crates secured with metal fasteners for stability. Products are cushioned with bubble wrap and secured with wooden braces, with special attention to protecting vulnerable parts. External reinforcement includes high-strength PET plastic strapping and waterproof black film wrapping.