Cat 320D 320GC Foot Pedal Control Valve OEM Hydraulic Foot Pedal Valve

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Core Functions

• Travel Control (Primary Use): Left and right pedals control corresponding left‑right tracks. Pedal depression enables forward or backward movement, and pressing depth regulates travel speed.
• Attachment Function Control: Governs switch status and operation of breakers, quick couplers, hydraulic shears and other working tools.
• Precision Motion Assistance: On some machine models, it fine‑adjusts boom and arm positions or cooperates with joysticks to perform combined movements.
• Safety Neutral Reset Mechanism: Automatically returns to neutral when foot pressure is lifted, cutting pilot pressure supply to avoid unintended operation.

Working Principle

• As a pilot signal‑generating valve, it does not directly actuate travel motors but outputs small hydraulic pressure signals.
• When idle: Automatically returns to neutral with zero pressure output, machine stays stationary.
• When stepped on: Spool moves to send hydraulic signals to the main multi‑way valve for travel motor control.
• When released: Spring resets the valve assembly to stop all associated motions.

Common Faults

• Track offset during travel: Internal leakage or spool jamming in one pedal valve
• Pedal cannot rebound: Damaged return spring or stuck spool
• Underpowered traveling: Low pilot pressure or worn valve components
• Hydraulic oil seepage: Aged seals or structural damage to valve body

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