Description

Overview

The MV3 dash control valve combines park brake and trailer supply control in a compact module for modern heavy vehicle air brake systems. It replaces separate tractor park and trailer supply valves, so installers simplify plumbing and reduce potential leak points. In normal operation the driver uses the two push-pull dash buttons to apply or release tractor and trailer brakes in the correct sequence. Consequently, the MV3 dash control valve helps maintain predictable behaviour during coupling, uncoupling, and bobtail running.

Features – MV3 Dash Control Valve

• Firstly, dual-circuit design manages tractor park brakes and trailer air supply within a single dash-mounted housing.
• Secondly, integrated check and supply functions support reservoir protection and consistent delivery pressures during faults.
• Additionally, push-pull actuators give clear visual status for applied or released positions, so drivers can confirm brake state at a glance.
• Finally, a compact layout with 1/4in connections allows neat plumbing in crowded dash and console areas.

Specifications and Materials

This MV3 dash control valve module includes separate tractor and trailer functions with defined trip pressures for consistent control. Typical settings are 20-35 PSI for the tractor circuit, 20-45 PSI for the trailer circuit, and a non override point at 25 PSI ±5. Trailer delivery, reservoir, exhaust, and auxiliary ports use 1/4in connections, so matching fittings and lines are straightforward to source. The body uses a robust cast housing with quality internal seals suited to heavy transport air systems. Part number: AB8466. For deeper background on dash control modules and their role in heavy vehicle air brakes, refer to this technical overview of road vehicle air brake systems for general system principles.

Compatibility and Fitment

This cross-reference listing means this valve is a suitable replacement for the part numbers and applications shown. Some changes in air line plumbing may be required. 5005079, MVB4615T, N4400EK, N4400, 101437, 101437N, 102027, K095875, 340106, 14309481, 15503262, KN20615, 479301390B, 42042575, K101437, 20QE3187M, 20QE3187RM, 745-101890, 503140C91, 90004988, AV101437, 321569, 401232, 1600664, G15503262, MV-2, MV-3

Compliance and Safety

Correctly installed, the MV3 dash control valve supports safe operation of tractor and trailer spring brakes within a compliant air brake layout. Installers should follow current heavy vehicle air brake standards and vehicle manufacturer guidance, and they must verify all control functions during commissioning. Additionally, every circuit change should include a full leak test and a parked brake hold check on level and graded surfaces. Drivers should still apply normal parking procedures and visually confirm the push-pull buttons match the intended brake state.

Trailer Applications – MV3 Dash Control Valve

This valve suits prime movers and rigid trucks that tow semi-trailers or full trailers using conventional dual-circuit air brake systems. It is particularly useful where an older two- or three-valve dash layout needs replacement with a simpler module. In addition, fleet operators can standardise on one MV3 dash control valve design across multiple vehicle types that share similar supply and delivery requirements. When planning a changeover, technicians should check existing plumbing and label lines so the new module reproduces the original control logic.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Technicians should still confirm thread sizes, port positions, and required pressure settings on the vehicle before finalising any replacement choice.

Why Choose ICS Trailers

ICS Trailers focuses on proven air brake parts for heavy trailers and prime movers, so you can source components that suit demanding transport work. Our team checks technical data carefully and matches valves to real-world applications, not just catalogue descriptions. Furthermore, we back our range with local knowledge and responsive support to help workshops keep vehicles on the road with less downtime. Browse Air Brake Parts at ICS Trailers