SY215 SY215-8 Excavator Spare Parts Excavator Hydraulic Pilot Control Valve

SY215 SY215 - 8 Excavator Spare Parts Pilot Control Valve Excavator Hydraulic Foot Pedal Valve

Description;The travel control lever pedal valve assembly is a pilot hydraulic control device located at the bottom of the cab. It is operated by foot to drive actions such as traveling and the breaker, enabling efficient division of labor where both hands focus on the control levers and both feet control auxiliary actions.
Core Functions
• Travel Control (Most Common): Left and right foot pedals correspond to the left and right tracks. Pressing down moves the machine forward or backward, with the travel distance determining the speed.
• Attachments Control: Controls the switches and actions of attachments such as breakers, quick couplers, and hydraulic shears.
• Motion Assistance: On some models, it is used for fine-tuning the boom and stick, or in conjunction with the joystick to perform compound actions.
• Safety Neutral: Automatically returns to the neutral position when not pressed, cutting off control pressure to prevent accidental operation.
Working Principle
• It is a pilot control valve that does not directly drive the motor but only outputs a small pressure signal.
• When not stepped on: It automatically returns to the neutral position, with no pressure output and the machine remains stationary.
• When stepped on: The valve core moves, outputting a hydraulic signal to the main multi-way valve to control the movement of the walking motor.
• When released: The spring automatically resets, and the action stops.
Common Faults
Walking deviation: internal leakage or sticking of one side pedal valve
Pedal not returning: spring broken, spool jammed
Weak walking: insufficient pilot pressure, valve wear
Oil leakage: seal ageing, valve body damage

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