Foot Pedal Control Valve 702-16-04252 702-16-04251 Compatible with Komatsu PC200-7 PC200-8 PC300-7 Excavator

Foot Pedal Control Valve 702-16-04252 702-16-04251 Compatible with Komatsu PC200-7 PC200-8 PC300-7 Excavator

Description;The travel control lever‑pedal valve assembly is a pilot‑operated hydraulic control unit installed at the bottom of the operator’s cab. Foot‑operated, it governs functions including machine travel and hydraulic breaker operation, allowing effective task separation: hands operate main control joysticks while feet manage auxiliary movements.
Core Functions
• Travel Control (Primary Function): Left and right foot pedals match the left and right tracks. Depressing pedals propels the excavator forward or backward, with pedal stroke governing travel speed.
• Attachment Control: Manages activation and operation of attachments such as breakers, quick hitches and hydraulic shears.
• Motion Auxiliary: On certain machine models, it fine‑tunes boom and arm movements or coordinates with joysticks to execute combined motions.
• Neutral Safety Feature: Automatically resets to neutral when released, cutting pilot pressure supply to avoid unintended operation.
Working Principle
• This pilot control valve generates only low‑pressure signal output instead of directly driving travel motors.
• Unpressed state: It returns to neutral automatically with zero pressure output, keeping the machine stationary.
• Depressed state: Spool displacement sends hydraulic signals to the main multi‑way valve to actuate travel motors.
• Released state: Spring‑powered automatic reset halts all related movements.
Common Faults
• Travel deviation: Internal leakage or spool sticking in one‑side pedal valve
• Failed pedal return: Broken return spring or jammed spool
• Sluggish travel: Low pilot pressure or valve component wear
• Hydraulic oil leakage: Aged seals or damaged valve body

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