Wabco 4324101690 Single Chamber Air Dryer Unloader

Description

The Wabco 4324101690 Single Chamber Air Dryer Unloader is a critical component in maintaining the integrity of a vehicle's air brake system. It's designed for use in heavy-duty vehicles and trailers, removing moisture and contaminants from the compressed air supply. This ensures consistent braking performance and extends the life of air brake components. This device operates with a cut-out pressure of 9.5 bar and a maximum operating pressure of 13.0 bar, and it features a 24V heater (894 260 040 2) with a Kostal M27 x 1 heating connection. Its dimensions are 152 x 189 x 257 mm. The calculated volume is 7.383, and it uses a desiccant cartridge for effective moisture removal while operating within a temperature range of -40°C to +65°C.

Key Features & Benefits

This little guy really has one main job – it periodically releases the built – up air pressure in your air dryer system. It’s basically a valve that cycles open and closed. This purging action gets rid of water and oil that have accumulated in the system. It also helps maintain consistent air pressure. Some have a small filter as part of it too, just to catch some extra debris. It’s a key component of your air brake system, mostly found on larger vehicles like trucks, buses, and sometimes even RVs. The air compressor makes the air, but it also creates moisture. That moisture has to get removed because water and air brakes don’t mix well – it can cause corrosion, freezing in the winter, and just general system failure. The air dryer does the bulk of that work, and this unloader helps it do its job efficiently. It’s positioned right after the air dryer itself.

Symptoms, Risks & Replacements

Look, air brakes are critical for stopping these bigger vehicles. If moisture gets into the lines, it can cause brake fade, meaning you’ll need more and more pressure to get the same stopping power. That’s obviously dangerous. The unloader prevents that buildup, keeping the air dry and the brakes responsive. You’ll notice if this part starts to fail, usually with longer brake engagement times or inconsistent air pressure readings on your gauge. It acts like a shield against corrosion and keeps everything running smoothly. If you're doing any brake work, it’s a good idea to check this part. You can find these pretty easily—we stock them at Fixparts Online, or most auto parts stores should have one.

Warranty Information

Wabco Single Chamber Air Dryer Unloader (MPN 4324101690) comes with a 1-year warranty.