Foot Pedal Valve 561-7001 5617001 For Engine C7.1 C4.4 Excavator E320D E323D

This foot valve employs single-foot or dual-foot coordinated operation modes. The pedal travel is proportional to the pilot hydraulic pressure output, allowing the operator to precisely control the main valve core displacement. The pedal's damping feedback force can be adjusted according to working conditions, effectively reducing leg fatigue during prolonged operation. The valve body has a compact structure and a rational oil port layout. The bottom and side interfaces facilitate pipeline arrangement, adapting to the installation requirements of narrow spaces in the cab, ensuring sensitive operation response and smooth, continuous action.

As the "nerve ending" of the hydraulic system, this valve generates a proportional pilot pressure signal through changes in pedal angle, remotely controlling the opening and reversing of the main multi-way valve core. When the pedal is depressed, the internal spool valve structure precisely adjusts the flow and pressure of the control oil circuit, achieving linear regulation of the hydraulic motor speed and cylinder action speed. The dual-connection, bidirectional design can simultaneously control two independent oil circuits, meeting the combined action requirements of forward and reverse rotation of the travel motor and speed regulation, improving operational coordination.

The valve integrates a pressure limiting and buffering structure. When the operator quickly releases the pedal, the internal drain channel rapidly releases the pilot pressure, preventing shock to the actuator due to sudden pressure changes. In case of system overload or pipeline rupture, the valve core automatically returns to the neutral position, cutting off the pilot signal output and ensuring the main valve enters a safe locked state. This feature effectively protects core components such as hydraulic pumps and motors, reducing the risk of accidental equipment damage and maintenance costs.

The valve body is made of high-strength alloy material, and most internal parts are made of stainless steel, possessing excellent corrosion resistance and wear resistance. The sealing system can withstand high back pressure, maintaining high volumetric efficiency and reliable sealing under dusty, vibrating, and drastically temperature-changing conditions. The valve core has precise clearance, strong anti-contamination ability, allows the use of standard hydraulic oil, and adapts to a wide range of oil viscosity, ensuring stable start-up and continuous operation in high-altitude, low-temperature, or high-temperature environments.