Wabco 4750190000 Relay Valve

Description

The Wabco 4750190000 Relay Valve is a critical component in air brake systems, functioning as a protective valve to ensure reliable and safe braking performance. It's primarily used in commercial vehicles and trailers to regulate air pressure and prevent damage to the system. This device features M22 x 1.5 port threads and mounting via 4 X M8 bolts. Its dimensions are 106 x 106 x 98 mm. The relay valve is designed to meet OE specifications, offering enhanced durability, consistent performance, and improved system protection across a wide temperature range of -40°C to +80°C.

Key Features & Benefits

This thing basically manages the air pressure between your air compressor and your air tanks, and then distributes it to the rest of your air brake system. Think of it like a traffic controller for the air. It doesn’t create the air pressure, it just directs where it goes and makes sure everything gets what it needs, and at the right amount. It also prevents the whole system from getting overloaded if one part malfunctions. It sits between the air compressor and the first downstream component, typically your air dryer. From there, it supplies air to everything – the brakes, of course, but also things like the parking brake, the suspension if you have air suspension, and sometimes even accessories. It’s a central point, so everything relies on it functioning correctly. You'll notice if it starts to fail because it’ll affect your brake response time or how quickly your air pressure builds up.

Symptoms, Risks & Replacements

Without a good relay valve, your air brakes simply won't work reliably. It acts like a shield protecting the rest of your system from pressure spikes. If it fails completely, you’ll lose air pressure and lose your braking ability. It's one of those parts where preventative maintenance is really key – it’s far better to replace it before it causes a bigger, more expensive problem. We carry a good selection of these at Fixparts Online, and honestly, it’s something a lot of experienced drivers like to keep a spare of on hand, especially on long hauls.

Warranty Information

Wabco Relay Valve (MPN 4750190000) comes with a 1-year warranty.