Wabco 4733030050 Proportioning Valve

Description

The Wabco 4733030050 Proportioning Pressure Regulator, also known as a Proportioning Valve, is a critical component in air brake systems. It is designed to maintain optimal braking balance by regulating air pressure to the rear axle based on the load. This valve ensures consistent and reliable braking performance in commercial vehicles and trailers. Its robust construction and precise engineering deliver enhanced safety and control, optimizing stopping distances and minimizing the risk of skidding. The dimensions of this regulator are 137 x 104 x 130 mm. It features calculated volume of 1.8522, exhaust port of 12mm, limited backflow of 0.8 bar, maximum operating pressure of 10.2 bar, and port threads of M16 x 1.5 JED - 388. It operates within a temperature range of -40°C to +80°C and meets OE specifications.

Key Features & Benefits

This little valve basically regulates the air pressure going to the rear brakes compared to the front. It’s all about balance. It takes the air pressure from your foot applying the brakes and distributes it in a way that prevents the rear wheels from locking up before the front ones. It does this mechanically, based on how much force you’re applying. More pressure, more balance, less pressure, it scales back a bit. It’s a pretty simple device, actually, but does a crucial job. Think of it like this—your front brakes do the bulk of the stopping, especially in an emergency. The rears help, but they’re more prone to locking if they get too much pressure. This valve ensures that the rear brakes don’t grab too hard, which would throw off your steering and potentially cause a skid. It's part of the overall air brake system, working with everything else to slow and stop the vehicle safely. It’s a critical piece in maintaining stability during braking.

Symptoms, Risks & Replacements

If this valve fails, you’ll notice if you're doing a brake test that the rear brakes might lock up too easily, especially in harder stops. That can lead to loss of control—you don’t want your rear wheels locked while you're trying to steer! Or, it could cause uneven braking which is never a good feeling. It really is important for safety. You can find a good replacement on sites like Fixparts Online, and honestly, if you're dealing with air brakes, it's always a good idea to keep a spare on hand. They aren't overly expensive, and peace of mind is worth it.

Warranty Information

Wabco Proportioning Valve (MPN 4733030050) comes with a 1-year warranty.