Wabco 9640010020 Lock Valve

Description

The Wabco 9640010020 Lock Valve is a critical component within air brake systems, designed to control airflow and maintain pressure. It is commonly used in heavy-duty vehicles and trailers to ensure reliable braking performance. This device adheres to OE specifications, guaranteeing compatibility and consistent functionality. Measuring 50 x 60 x 147 mm, it features M12 x 1.5 port threads and operates effectively within a temperature range of -40°C to +80°C with a maximum operating pressure of 12.0 bar. Though it is named a 'Lock Valve

Key Features & Benefits

Basically, this valve keeps air pressure in the brake lines even when you turn the ignition off. It holds everything tight, preventing the brakes from slowly releasing and the vehicle from rolling – especially important on a hill. It also manages the application and release of spring brakes, which are a safety feature on many trucks and trailers. It has a manual control, a spring chamber, and connections for service and emergency lines. It directs airflow to either hold the brakes applied, release them, or allow normal braking. Think of it as a critical piece of the air brake system, primarily on larger vehicles. It’s the thing that keeps the trailer or truck staying put when parked. It's often tied directly into the emergency and parking brake functions, so when you pull the parking brake handle, you're activating this valve to apply those spring brakes. It’s not involved in your normal day – to – day driving brakes, just when you're stopped and need to keep the vehicle secure.

Symptoms, Risks & Replacements

It’s a big safety item, plain and simple. You’ll notice if this thing goes bad – the parking brake might not hold, or it might stay partially applied while you're driving, which isn't good. A failing lock valve can lead to rollaways, or seriously affect your ability to safely park. They do wear out over time, especially with road grime and moisture getting into the system. If you’re doing any kind of brake work, it’s a good idea to inspect this valve. You can find replacements pretty easily – we carry a good selection at Fixparts Online, and other auto parts suppliers do as well. It’s one of those things you don’t want to mess around with – getting a new one is much cheaper than dealing with a runaway vehicle.

Warranty Information

Wabco Lock Valve (MPN 9640010020) comes with a 1-year warranty.