Wabco 8940411122 Proximity Switch

Description

The Wabco 8940411122 is a proximity switch used within air brake systems, specifically as an air valve component. This switch is designed to detect the presence of nearby objects without physical contact, enabling precise and reliable operation of the air brake system. The switch measures 35 x 167 x 187 mm and meets OE specification, ensuring a perfect fit and consistent performance. This component enhances system safety and efficiency by providing a robust and accurate sensing solution.

Key Features & Benefits

These switches basically detect when something gets close to them without actually touching. In your air brake setup, it’s usually sensing the position of a component – like a valve moving, or a lever being activated. It sends a signal – an electrical 'yes' or 'no' – based on whether something is within that close range. It’s a non – contact sensor, so it's really reliable, since there’s nothing to wear out from physical contact. In your air brakes, this switch often monitors the position of your emergency brake valve or trailer supply valve. It tells the system whether those valves are applied or released. It's like a messenger; it's constantly reporting status to the air brake control module. Depending on the setup, it could also be used with the parking brake system or even ABS.

Symptoms, Risks & Replacements

This is a safety item, plain and simple. If the switch fails, the system might not know the correct position of a critical component. That can lead to the brakes not applying properly, or not releasing when they should. You’ll notice if one goes bad because you might get a warning light on your dash – often an ABS or brake system light. It could also cause issues with the trailer brakes not functioning. They’re pretty durable, but these things do fail over time, so it’s good you’re thinking ahead. You can usually find a good replacement pretty easily – places like Fixparts Online have a good selection. It’s one of those parts where it's best to replace it proactively rather than waiting for a complete failure.

Warranty Information

Wabco Proximity Switch (MPN 8940411122) comes with a 1-year warranty.