Wabco 4721960030 ABS Trailer Relay Valve

Description

The Wabco 4721960030 ABS Trailer Relay Valve is a critical component within the air brake system of trailers. It's designed to regulate air pressure to the trailer brakes, ensuring optimal braking performance and stability. This device is essential for maintaining safe and reliable trailer operation. The valve features a robust construction with an IP 66 / IP 69K protection class, ensuring durability in harsh environments, and operates within a temperature range of -40°C to +80°C. With dimensions of 97 x 117 x 100 mm, it fits seamlessly into existing air brake systems. Key parameters include a breakpoint of 0.3 bar, a calculated volume of 1.1349, and a maximum operating pressure of 10.0 bar, contributing to precise and responsive brake control.

Key Features & Benefits

This valve basically manages the air pressure going to the trailer’s brakes when your truck’s ABS system activates. It’s a pretty clever little thing – it receives a signal from your truck’s ABS module and then quickly opens and closes to regulate air flow. It doesn’t make the brakes work, it just controls how the ABS system influences them on the trailer. It’s designed to prevent wheel lockup during braking, just like ABS on the truck itself, but it handles the trailer’s system separately. Think of it as a translator between your truck’s ABS and the trailer’s air brakes. When your truck senses a wheel starting to lock up, it tells this valve to momentarily reduce the air pressure to that specific trailer wheel. It's a separate system from your truck’s primary braking, dedicated to keeping the trailer stable. It's part of the whole air brake setup – you've got the air compressor, lines, and then these valves controlling things.

Symptoms, Risks & Replacements

Without this, your trailer's ABS won’t function properly. You’ll notice if it fails – it’ll feel like the trailer is pulling or not braking evenly. A malfunctioning valve can lead to wheel lockup on the trailer, which is really dangerous, especially at highway speeds. It's a critical safety component. You can sometimes find replacements at places like Fixparts Online, but it's always best to make sure you get a quality part for something this important. It’s not something you want to cheap out on.

Warranty Information

Wabco ABS Trailer Relay Valve (MPN 4721960030) comes with a 1-year warranty.