Wabco 8971307944 Diaphragm

Description

This diaphragm, manufactured by Wabco, is a critical component within air brake systems, specifically air valves. It functions to regulate air pressure and ensure proper braking performance in heavy-duty vehicles. With dimensions of 2 x 50 x 48 mm and MPN 8971307944, this diaphragm is engineered to meet OE specifications, providing a precise fit and reliable operation. This component delivers enhanced durability and consistent performance, contributing to overall brake system efficiency and safety.

Key Features & Benefits

This thing basically converts air pressure into mechanical movement. Think of it like a muscle – air pushes on one side, and that makes it move something else on the other side. Specifically, it moves levers and rods inside your air valves. It’s rubber, so it flexes to do that job. It lives inside an air valve – usually a treadle valve or relay valve, things that control the air brakes themselves. When you step on the brake pedal, or the system needs to apply the brakes automatically, air pressure builds up and pushes on the diaphragm. That movement then tells the valve to send air to the brake chambers, actually stopping the wheels. It’s a key part of how the air brakes get activated.

Symptoms, Risks & Replacements

Well, these are rubber, and rubber always wears out. Over time, it can crack, dry rot, or just lose its flexibility. If it fails, you’ll likely get a loss of braking power. You might notice if your brakes feel spongy, or aren’t applying fully, or even that your parking brake won’t hold properly. It acts like a shield protecting the internal parts of the valve from moisture and contamination, so a bad diaphragm can let things get dirty inside the valve and cause bigger problems. Luckily, they're usually pretty straightforward to replace. You can find these pretty easily – we stock a lot of them, or you can check places like Fixparts Online to get an idea of what you need for your specific vehicle.

Warranty Information

Wabco Diaphragm (MPN 8971307944) comes with a 1-year warranty.