Wabco 9730090040 Trailer Control Valve

Description

The Wabco 9730090040 Trailer Control Valve is a critical component in air brake systems, designed to regulate air flow to trailer brakes. It is used in heavy-duty trucks, trailers, and other commercial vehicles to ensure safe and efficient braking performance. This device adheres to OE specifications, offering reliable operation and durability. Measuring 137 x 146 x 172 mm, the valve features multiple M22 x 1.5 JED-388 and M16 x 1.5 JED-388 port threads, and is built for a maximum operating pressure of 8.5 bar and a temperature range of -40°C to +80°C. Its robust construction and precise engineering contribute to consistent brake modulation and enhanced safety.

Key Features & Benefits

This valve basically manages the air pressure going to your trailer’s brakes. It has a few jobs, but the big ones are controlling the service brake – that’s when you press the brake pedal in your tow vehicle – and the emergency brake, which kicks in if there’s a loss of air pressure in the system. It also regulates the spring brakes, which are automatically applied if you lose air pressure. It's really the central point where your truck’s brake signal tells the trailer's brakes what to do. Think of it as the translator between your truck and the trailer. Your truck sends an air signal, and this valve takes that signal and tells the trailer’s air brakes how hard to apply. It’s part of the whole air brake system that allows you to safely and effectively slow down and stop when you’re towing. It sits between the air lines coming from your truck and going to the trailer. It’s not something you see working, but it’s crucial for everything working correctly.

Symptoms, Risks & Replacements

Well, it's important because it directly impacts your safety. If this valve fails, you could end up with brakes that don’t respond properly, or that lock up unexpectedly. You’ll notice if it’s going bad – things like longer stopping distances, the trailer pulling to one side when braking, or even the trailer brakes locking up. It acts like a shield, preventing runaway trailers or uncontrolled braking. It’s a vital component and needs to be in good working order. You can find a good replacement, and we can check stock, over at Fixparts Online, but honestly, any reliable auto parts store will have them. Just make sure it’s the right one for your setup.

Warranty Information

Wabco Trailer Control Valve (MPN 9730090040) comes with a 1-year warranty.