Wabco 4728800300 Solenoid Valve

Description

The Wabco 4728800300 Solenoid Valve is a critical component within air brake systems, designed to control the flow of compressed air to actuate brakes in commercial vehicles. This valve is used to ensure reliable and responsive braking performance. It features a Bayonet DIN 72585-A1-4.2-Sn/K2 electrical connection, operates at a maximum pressure of 20.0 bar, and is suitable for mounting with 2 x Ø 9 mm bolts. The multi nominal diameters range from 9.8 / 7.0 / 0.6 mm, and its port threads are M22 x 1.5 JED - 388. With dimensions of 73 x 205 x 167 mm, this device offers robust performance and durability. It's designed to OE specification, providing a reliable and consistent level of quality, and operates efficiently across a wide temperature range of -40°C to +80°C with a 24V voltage and 320mA current draw. The valve is also protected to IP 6K9K / IP 6K6K standards ensuring a high level of protection against dust and water ingress.

Key Features & Benefits

Basically, this little guy controls the flow of air to your trailer brakes. It’s an electrically activated valve – meaning when it gets a signal, it opens or closes to let air through, or block it. It manages the air pressure going to the brake chambers on your trailer. It does this really quickly and precisely, responding to what you’re doing with your brake pedal in the truck. It’s a key part of how you tell the trailer to slow down or stop. Think of it as the translator between your truck's braking system and the trailer’s brakes. Your foot applies pressure in the truck, that signal gets sent electrically to this valve, and it then uses air pressure to physically apply the brakes on the trailer. It’s usually part of the emergency brake system too – it can lock up the trailer brakes independently if there's a problem with the main line. It’s really that important communication link.

Symptoms, Risks & Replacements

Without a working solenoid valve, your trailer brakes won't work properly, or at all. That’s a big safety issue, plain and simple. You’ll notice if it's failing – you might get a really long stopping distance, or the trailer might pull to one side when you brake. Sometimes you’ll hear a hissing sound if there’s an internal leak. It acts like a shield, protecting your ability to control the trailer, and if it goes bad, you lose that control. You can find replacements for pretty much any trailer make and model at places like Fixparts Online, and honestly, it’s one of those parts you don't want to put off replacing if you suspect a problem. It’s a relatively inexpensive part compared to the potential cost of an accident.

Warranty Information

Wabco Solenoid Valve (MPN 4728800300) comes with a 1-year warranty.