This Wabco roller, part number 4757101304, is a critical component within air brake systems, specifically used in air valves. It functions to ensure smooth and reliable operation of the air brake system, contributing to vehicle safety and control. Measuring 14 x 6 x 6 mm, this roller is manufactured to OE specification, ensuring precise fit and performance and optimizing system efficiency. These little guys basically let air flow in one direction, but block it from coming back the other way. Think of it like a one – way street for air. They’re part of what's called an air valve, and they allow air to build up pressure in the system when you’re applying the brakes, but prevents it from leaking back out when you release them. They're often found in things like the control valve or the treadle valve. In the whole braking system, these rollers are a small but vital part. They make sure air pressure goes where it needs to, when it needs to. Without them functioning correctly, the air pressure won't hold consistently, and that affects your stopping power. They’re inside the valve assembly, so you won't see them directly when you're looking at the overall brake setup. If one of these rollers fails, you’ll notice if your brakes feel spongy or don’t hold consistently, especially after repeated use. It can cause delayed braking or even complete brake failure in some cases, which, obviously, is a big safety concern. They’re a relatively inexpensive part, but replacing a bad one is much cheaper and safer than dealing with brake problems down the road. You can find a good selection of them over at Fixparts Online, and honestly, it's a good idea to replace these when you're rebuilding or servicing an air valve anyway, just for peace of mind. It’s a small part, but it acts like a shield against bigger issues. Expert assistance: Roller (MPN 4757101304) is covered by a 12-month warranty!

About Wabco

WABCO specializes in air braking systems, EBS, ABS, ADAS, and trailer control systems.

Why Choose Wabco?

• Wabco parts are known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, covering many different makes and models of vehicles. • Our parts are made to meet or beat the quality of original equipment, so you can trust their performance. • Wabco offers great customer support to help you find the right parts and answer any questions you may have. Drive with confidence – choose Wabco parts at FixParts Online.