303.06.0055 Compatible ALB Load Sensing Valve

What does an ALB load sensing valve do?

This ALB load sensing valve plays a critical role in the pneumatic braking system of heavy commercial vehicles by adjusting brake pressure based on the current vehicle load. By utilizing a mechanical sensing mechanism, it ensures that braking performance remains consistent whether the vehicle is empty or fully loaded. This component is essential for maintaining stability and preventing brake lock-up during deceleration.

Vehicle and engine compatibility

This valve is engineered for high-performance compatibility with various Volvo truck series, including the F7, F10, F12, FL10, FL12, N10, N12, NL10, NL12, B10B, B10M, and B12 models. It is designed to function seamlessly within systems used in heavy-duty transport applications. It is also compatible with WABCO systems.

Technical specifications and installation

Technical specifications include an empty pressure port of 3.6 BAR and a full pressure port of 5.7 BAR at Port 41/42. The unit features Port 1 with an M22x1.5 thread and Port 2 with dual M16x1.5 threads. Maintenance should involve regular inspections of the sensing arm and connection ports to ensure no pneumatic leaks occur.

Maintenance and selection guidance

For technicians performing brake system overhauls, verifying the pressure thresholds against the specific engine configuration (such as TD122 or D12A) ensures accurate load-sensing response. Consult your authorized distributor.

OE cross-reference

303.06.0055 (ALB Load Sensing Valve) is the equivalent of the Volvo and WABCO OE numbers. This part directly replaces Volvo OE number 527731285030. It also replaces WABCO OE number 4757110930.