VolvoHydraulic Parts

85139953 — Link Height Control Valve 85144423 85139953 85124912 For Volvo Vnl Mack All Ports 1/4 Truck

This is a height control valve, a critical component in the vehicle's suspension system that automatically adjusts air pressure to maintain a set ride height. Manufactured to meet rigorous OEM standards, it ensures consistent vehicle performance and load distribution unlike a worn valve that may leak or stick. Operators might observe the vehicle sagging on one side, an uneven ride height, or difficulty maintaining a level stance when this valve malfunctions.

Link Height Control Valve 85144423 85139953 85124912 For Volvo Vnl Mack All Ports 1/4 Truck – Part No 85139953 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryHydraulic Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

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.

Part TypeHeight Control Valve
MaterialAluminum alloy and NBR rubber
ApplicationAir suspension system
Service LifeReplace every 3,000 hrs or 3 years
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing height control valve is often a noticeable sag in the suspension on one side of the vehicle. If left unaddressed, the valve may fail to adjust, leading to an excessively rough ride, uneven tire wear, and potential damage to suspension components. In severe cases, it can compromise vehicle stability and handling.

Installation Tip

Before installation, thoroughly clean the air line connections to prevent debris from entering the new valve. Avoid bending or kinking the air lines excessively during mounting, as this can restrict airflow and cause performance issues.

Service Note

Inspect the air springs (suspension bellows) and all associated air lines for leaks or damage when replacing the height control valve.