Wabco 4730170010 Relay Valve

Description

The Wabco 4730170010 Relay Valve is a critical component within air brake systems, responsible for efficiently relaying and regulating air pressure to the brake actuators. It's primarily used in commercial vehicles and trailers to ensure reliable and responsive braking performance. This pressure reduction valve features M22 x 1.5 exhaust and port threads, along with 4x M8 mounting points, and operates effectively within a temperature range of -40°C to +80°C. Its design maintains a consistent 1:1 regulating ratio with a predominance of 1.00 bar, ensuring precise control and enhanced safety. The valve dimensions are 126 x 103 x 99 mm and adheres to OE specifications.

Key Features & Benefits

Basically, a relay valve takes the signal from your brake pedal – that initial push – and boosts it, sending a stronger, faster signal down the air brake lines to the brake chambers at each wheel. It’s like an amplifier for your braking. It manages the air pressure, allowing a quick build – up when you apply the brakes, and then releases it when you let off. It also has a “quick release” feature – it vents the air from the brake lines faster than the foot valve alone can, which helps with quicker braking and prevents the brakes from staying partially applied. It sits in the air brake system, usually somewhere between your foot valve and the air brake chambers. It's a key component in how your air brakes work, taking that initial signal and distributing the air pressure to actually do the stopping. Think of it as a middleman, stepping up the power. It's most commonly found on trucks and trailers, of course, anything using air brakes.

Symptoms, Risks & Replacements

Well, if this valve fails, you’ll notice if you're trying to stop. You might get a delayed response when you hit the brakes, or they might not apply fully. It can also cause the brakes to drag a little, which wastes fuel and wears down your brake components faster. A failing relay valve is a safety issue, plain and simple. You want to address it as soon as you suspect a problem. We carry a good selection of them, and you can also find options at places like Fixparts Online, just to compare. Getting the right one is important, so make sure you have your vehicle’s information handy when you order.

Warranty Information

Wabco Relay Valve (MPN 4730170010) comes with a 1-year warranty.