Wabco 4758003070 Load Sensing Valve

Description

The Wabco 4758003070 Load Sensing Valve is a critical component within air brake systems, primarily used in commercial vehicles to maintain stable braking performance under varying load conditions. It dynamically adjusts the braking force to each axle based on the vehicle's weight distribution, ensuring optimal stopping power and control. This valve features a mechanical type of operation with a dynamic functionality and operates within a temperature range of -40°C to +80°C. It has a mounting configuration of 2x Ø 9 mm, port threads of M12 x 1.5, and dimensions of 93 x 103 x 242 mm. Its OE specification ensures reliable performance and compatibility, while the actuation angle ranges from -30° to +30° and the range of adjustment is from 0 to 7.2 bar.

Key Features & Benefits

This valve basically monitors how much weight your vehicle is carrying, and then adjusts the air pressure going to the rear brakes accordingly. It’s a pretty smart little piece. It does this by physically sensing the movement of your suspension – how much it's compressing under load. That movement tells the valve how heavy the load is. It then proportionally increases or decreases the air pressure sent to the rear air springs and brakes. Think of it as the brain controlling the rear brakes, making sure they’re working with the weight you’re hauling. Without it, your rear brakes might not be strong enough when you’re loaded, or they might lock up easily when you're empty or lightly loaded. It's a key part of keeping everything balanced and safe, especially on trucks, trailers, and heavier vehicles that use air brakes.

Symptoms, Risks & Replacements

It’s vital for safe stopping. If you're carrying a full load and this valve fails, you might have seriously reduced braking power in the rear – a really dangerous situation. Conversely, if it fails and over applies pressure to the rear brakes when unloaded, you’ll notice if you’re getting a lot of rear – wheel lockup. It’s designed to prevent that. It helps maintain stability, reduces brake wear, and helps you stay in control. You can find these fairly easily online, Fixparts Online usually has a good selection, but it’s one of those parts where a failing one is a definite safety concern so I’d recommend getting it sorted quickly.

Warranty Information

Wabco Load Sensing Valve (MPN 4758003070) comes with a 1-year warranty.