Description

Overview

The MV3 dash valve is a combined tractor and trailer dash control module for heavy vehicle air brake systems. It replaces separate push pull valves with a two button unit that simplifies plumbing and cab layout. As a result, drivers can manage parking and trailer supply functions from one reliable control. This suits fleet operators who want consistent cab layouts, easier troubleshooting and proven air brake components.

Features

Firstly, the MV3 dash valve integrates a dual circuit supply valve and check valve in a single compact body for efficient system design. Additionally, the module uses clearly identified push pull buttons so drivers can see parking and trailer supply status at a glance. Furthermore, internal logic provides tractor and trailer valve crack pressures in the 20–45 PSI range to support controlled spring brake release. Finally, the design supports replacement of existing two or three valve push pull systems which helps standardise older fleets.

Specifications and Materials

This MV3 dash valve provides 1/4″ NPT tractor and trailer delivery ports, along with 1/4″ NPT reservoir connections and exhaust to match common heavy vehicle plumbing. The auxiliary supply port is also 1/4″ NPT, which simplifies teeing into existing air circuits. Tractor and trailer sections operate in the typical 20–35 PSI and 20–45 PSI ranges so they suit standard spring brake systems. Part number: AB8436. Further technical background on MV3 dash control modules is available in this government safety summary NHTSA MV3 valve safety notice

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. 106981, 20QE3316M2, 800259, 800515, 5002205, 5005646, ABC5005646, KN20601, N4400EA – N4400C, MV-3

Compliance and Safety

The MV3 dash valve is intended for use in air brake systems designed to meet relevant heavy vehicle standards, including systems built to FMVSS 121 style performance requirements. In addition, the combined module layout can help reduce leak points when compared with separate valves. Operators should always depressurise the system, chock wheels and follow workshop procedures before removal or installation. Consequently, using qualified technicians and leak testing after fitment is essential for safe trailer operation.

Trailer Applications

This MV3 dash valve suits prime mover and trailer combinations where the driver must control both park and trailer air supply from the cab. It is commonly used on highway trailers, dollies and converter gear that rely on standard spring brake and service brake layouts. In addition, it can support refurbishments where older two or three valve push pull arrangements are being updated. Workshops can therefore use it as a central dash control point in many conventional air brake builds.

Cross-reference and Suitability

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

These cross-reference options assist parts interpreters and workshops in matching existing components without guesswork.

Why Choose ICS Trailers

ICS Trailers focuses on proven heavy vehicle air brake components that suit Australian fleet conditions. Our team selects parts with strong cross-reference coverage so you can match OE and aftermarket numbers quickly. In addition, we back our range with practical trailer experience and responsive customer support to keep downtime low. For more air system components in this range, visit our Air Brake Parts selection at Air Brake Parts at ICS Trailers