This is an air suspension balance or levelling valve, a key component in the pneumatic suspension system of Volvo and Daf trucks, maintaining ride height and stability. It is engineered to precise tolerances, ensuring consistent air pressure distribution across the suspension, unlike a worn valve that may leak or fail to regulate pressure. Operators may observe the vehicle leaning to one side, uneven ride height, or a harsh ride when this valve malfunctions.
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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 noticeable symptom of a faulty air suspension levelling valve is the vehicle leaning noticeably to one side or an inconsistent ride height between axles. If left unaddressed, the valve may fail to regulate pressure entirely, leading to a complete loss of air in the suspension and a very rough, jarring ride. The ultimate consequence is potential damage to suspension components, chassis, and cargo due to excessive stress and vibration.
Before connecting air lines, ensure they are clean and free from any internal debris that could clog the valve. Do not overtighten the mounting bolts, as this can warp the valve body and cause leaks.
Inspect the air suspension bellows for leaks or damage, and check the air supply lines for any signs of wear or abrasion.