Description

Overview

The adjustable adaptor valve Wabco style helps you control brake pressure transfer between towing vehicle and trailer so the system responds predictably under changing loads. It sits in the air brake control circuit and shapes the signal that downstream valves receive. In addition, it suits service replacements where you need Wabco style performance without reworking existing pipework. As a result, fleets can keep brake feel consistent across different trailers and dollies.

Features

• Adjustable adaptor valve Wabco style layout that suits common European and Australian heavy vehicle brake designs
• Factory set break point at 2.3bar with a 0.3 to 1.6bar adjustment range for fine tuning response
• Metric M22 x 1.5 port threads to match standard air brake fittings and simplify plumbing changes
• Two 9.5mm mounting holes on 38mm centres so technicians can reuse existing brackets where suitable

Specifications and Materials

This adjustable adaptor valve Wabco style uses separate port groups so you can manage supply, delivery, and sense lines cleanly. Port thread 1 is M22 x 1.5, while port thread 2 provides three M22 x 1.5 outlets, one supplied closed for unused positions. Port thread 2.1 and 2.2 are also M22 x 1.5, which keeps fittings consistent across the valve body. Break point is 2.3bar, and the range of adjustment runs from 0.3 to 1.6bar. Mounting uses two 9.5mm holes at 38mm between bolt centres for a compact footprint. Part number: AB8484.

For a more detailed explanation of how air brake relay and adaptor valves control pressure in heavy vehicles, refer to this manufacturer technical guide

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. AB9750010027, A4028531, M05996901, 1518277, 4611224, 99707005569, TDAS9750010020, D13263, M059969, 500366087, 04671316, 02524783, S9750010020, 308712, 817807, 8235-S9750010020, 90810114156, 88521806211, 2114678, 81521806211, 9750010020, 20932410, 81521206041, 5000546879, 912032-00015, 2090403, 351200011, 1013083

Compliance and Safety

Correct adjustment of the valve is critical, therefore technicians should always follow vehicle manufacturer instructions and brake diagrams. Set the break point and range with calibrated gauges so service brakes engage in line with axle load and legal requirements. In addition, check for leaks at all M22 x 1.5 connections and confirm that air lines have adequate support to avoid vibration damage. After installation, complete a full service brake test on level ground and verify that trailer braking remains stable under repeated applications.

Trailer Applications

Workshops typically use this adjustable adaptor valve Wabco style on multi axle semi trailers, converter dollies, and some rigid truck bodies with complex brake layouts. It suits European influenced running gear where M22 porting already exists. Additionally, it helps fleets standardise on one adjustable adaptor valve pattern across mixed equipment, which simplifies stocking and training. When you match the valve to the cross reference list and the correct mounting pattern, it becomes a straightforward service replacement.

Cross-reference and Suitability

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

Always confirm the valve layout and mounting against the original component so the cross-referenced choice maintains correct brake balance.

Why Choose ICS Trailers

ICS Trailers focuses on stocking air brake components that suit common Australian trailer and dolly setups, so you can complete jobs with fewer surprises. Our team reviews cross references carefully, and this adjustable adaptor valve Wabco style follows that same standard. Furthermore, we back our listings with practical information to help workshops match ports, threads, and mounting to the equipment in front of them. If you need related valves or fittings, our air brake range keeps most service tasks covered in one order.

For related parts and valves, browse the Air Brake Parts category at ICS Trailers