Wabco 4750100007 Pressure Limiting Valve

Description

The Wabco 4750100007 Pressure Limiting Valve is a critical component within air brake systems, designed to regulate and limit air pressure. It's typically used in heavy-duty vehicles and trailers to ensure safe and reliable braking performance. This valve maintains system pressure within a defined range, protecting components from damage and ensuring consistent brake application. It features a calculated volume of 0.91375, delivers 7.0 bar at 10.0 bar input, and operates with a maximum pressure of 20.0 bar. The valve’s adjustment range is 6.0 to 9.0 bar, it utilizes M22 x 1.5 port threads for both connections, and mounts via 2x Ø 8.6 mm bolts with a bolt spacing of 56.5 mm. Dimensions are 86 x 85 x 125 mm. It is an OE specification device, suitable for temperatures ranging from -40°C to +80°C.

Key Features & Benefits

This valve basically controls the maximum air pressure that goes into your brake system. It takes the higher pressure from your air compressor and reduces it to a safe level for the rest of your components – things like your air bags, actuators, and brake chambers. It’s a pretty simple idea, but really important for keeping everything working correctly. It doesn't make pressure, it just manages it, stepping it down to what the system needs. Think of it as a gatekeeper for your air brake system. It sits between the air compressor and the rest of the braking components. It ensures no single part is over – pressurized. It’s commonly found on trucks and trailers, anything that relies on air brakes to stop safely. Different vehicles might have it located in slightly different spots, usually somewhere along the air lines near the compressor or the first major components.

Symptoms, Risks & Replacements

Well, if this valve fails, you could have too much pressure going to parts that aren’t designed for it. That’s a recipe for blown seals, damaged actuators, or even complete brake failure. It acts like a shield, protecting the more sensitive parts of your air system. You’ll notice if it's failing – things like brakes dragging, unusually long stopping distances, or the air compressor running constantly. It's a relatively inexpensive part considering what it protects, and it's one of those things it's best to replace proactively if you suspect trouble. Fixparts Online has a good selection of these if you're looking for a replacement, and they often have diagrams that help you find the correct one for your vehicle.

Warranty Information

Wabco Pressure Limiting Valve (MPN 4750100007) comes with a 1-year warranty.