This is a pneumatic control valve designed to regulate air flow for the parking brake system in heavy-duty trucks. It ensures precise engagement and disengagement of the parking brake by controlling air pressure to the spring brake chambers. A worn valve may exhibit slow or erratic parking brake response, and a failed valve can lead to the parking brake not holding or releasing unexpectedly.
Always verify with serial number before ordering.
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Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
The first sign of a failing valve is often a delay in parking brake application or release. If ignored, the parking brake may become unreliable, intermittently failing to hold the vehicle or releasing prematurely. This can compromise vehicle safety during parking or on inclines.
Ensure the air system is fully depressurized before disconnecting any lines to prevent sudden air release. Do not overtighten fittings, as this can damage the valve body or threads.
Inspect air lines for cracks or leaks and clean the air dryer system when replacing this valve.