Wabco 4750200060 Pressure Limiting Valve

Description

The Wabco 4750200060 Pressure Limiting Valve is a critical component within air brake systems, specifically functioning as a relay valve to regulate air pressure. It's designed for use in heavy-duty vehicles and trailers, ensuring consistent and safe braking performance. This valve precisely controls the air supply to the brake actuators, preventing over-pressurization and maintaining optimal braking force. With dimensions of 104 x 131 x 168 mm, it features M22 x 1.5 port threads and supports a maximum operating pressure of 13.0 bar. Its robust design and OE specification guarantee reliable performance and longevity, contributing to enhanced vehicle safety and operational efficiency.

Key Features & Benefits

This valve basically controls the maximum air pressure that goes to your air brake chambers – the things that actually push the brake shoes out. It takes the higher pressure from your air compressor and reduces it to a safe level for those chambers. It’s a pretty simple idea, but it’s really crucial for everything working right. It has an inlet, an outlet, and a port that “feels” the chamber pressure, then adjusts itself to maintain a set maximum. Think of it like a regulator on a water hose. You don’t want full blast all the time, right? Same idea here. It sits in the air brake line, usually after the compressor and before the relay valves, and ensures consistent, controlled pressure to the brakes. It’s a core piece of the air system, making sure things don't over – pressurize and lock up, or under – pressurize and fail to stop. It's often part of what we call the "secondary" air system, protecting the trailer brakes especially.

Symptoms, Risks & Replacements

This is a big safety item. If it fails, you could end up with too much pressure going to the brakes, and that’ll cause them to drag or even lock up, especially on the trailer. You’ll notice if that’s happening, because the vehicle will feel sluggish or even pull to one side. Or, if it doesn't limit pressure effectively, your brakes may not engage fully. It acts like a shield against over – pressure, preventing damage and keeping you in control. It’s one of those parts that, when it’s working right, you don’t even think about it. But when it goes bad, it's a real headache. You can find a good replacement at places like Fixparts Online, and it’s a pretty straightforward swap for most experienced mechanics.

Warranty Information

Wabco Pressure Limiting Valve (MPN 4750200060) comes with a 1-year warranty.