Wabco 9140036404 Drive Dog

Description

The Drive Dog, manufactured by Wabco (MPN 9140036404), is a vital component within vacuum brake systems. It is specifically used in brake controls to facilitate efficient brake operation. This component adheres to OE specifications, ensuring reliable performance and compatibility. Its compact dimensions are 5 x 43 x 43 mm, and it's a key part of maintaining optimal braking functionality.

Key Features & Benefits

This little guy's job is to create the vacuum, or suction, that powers your power brakes. Older vehicles – and some newer ones too – rely on the engine’s intake manifold to make that vacuum. But if you’ve got something like a diesel engine, or a vehicle where that intake vacuum isn’t strong enough, or maybe you’ve done an engine swap, this pump makes that vacuum for you. It’s electrically powered, so it runs off your car’s battery, and it consistently pulls a vacuum to help you stop. It’s not the brakes themselves, it just powers the assistance that makes pressing the brake pedal easier. Think of it as an assistant to your brake pedal. Without enough vacuum, your pedal will feel really hard to push, like you're driving an old truck without power brakes. Everything still works mechanically, but you have to put a lot more effort into getting the car stopped. It connects to the master cylinder, which is the heart of your braking system, and supplies the vacuum needed for the power assist. A lot of lifted Jeeps and trucks use these, because modifications can sometimes mess with the natural vacuum available from the engine.

Symptoms, Risks & Replacements

It's important because, well, brakes are kinda important, right? If this pump fails, you’ll notice if you have to press the pedal a lot harder to get the same stopping power. It doesn’t mean your brakes instantly stop working, but it definitely makes things much less safe and more tiring to drive. It acts like a shield, protecting you from needing a huge amount of leg strength every time you want to slow down or stop. You can find these pretty easily online – Fixparts Online carries a good range, and they're generally pretty straightforward to install, but you definitely want to address a failing one quickly.

Warranty Information

Wabco Drive Dog (MPN 9140036404) comes with a 1-year warranty.