Wabco 8971215804 Diaphragm

Description

The Wabco 8971215804 Diaphragm is a critical component within air brake systems, specifically used in brake actuators. This diaphragm facilitates the transfer of air pressure to mechanically actuate the brakes, ensuring reliable stopping power for commercial vehicles. Manufactured to OE specification, this diaphragm delivers consistent performance and durability, contributing to increased safety and reduced maintenance costs. It measures 36 x 159 x 159 mm.

Key Features & Benefits

This little rubber piece is really the heart of how your brake actuator works. It's a flexible membrane, basically a sealed disc, that responds to air pressure. When you hit the brake pedal, air pressure builds up and pushes on this diaphragm. That movement then translates into mechanical force, pushing the pushrod that actually applies the brakes. It’s a simple idea, but critical. Think of it as the muscle in your air brake system. Without it, you have air pressure, but no way to use that pressure to physically stop the vehicle. It’s part of the actuator, which is the component that takes the air signal and turns it into stopping power. It's usually housed within the brake booster assembly.

Symptoms, Risks & Replacements

Well, if this diaphragm fails, your brakes will likely become weak or unresponsive. You might notice longer stopping distances, or the brakes might not hold properly, especially on hills. It can crack, tear, or just lose its flexibility over time from heat and age. You’ll notice if it’s gone bad because the pedal will feel spongy, or you might have trouble building up enough air pressure to fully engage the brakes. Replacing it is really important for safety – it’s not something you want to put off. You can find these diaphragms pretty easily online; we carry a good selection at Fixparts Online, and there are other suppliers of course. It’s a relatively inexpensive part considering how vital it is to keeping you and your vehicle safe on the road.

Warranty Information

Wabco Diaphragm (MPN 8971215804) comes with a 1-year warranty.