Description
Part Number: FAC1001C
Superseded p/n: F109994C, F109994C, 109994
Product Overview
This air dryer cartridge removes moisture and contaminants from the truck’s air brake system before they can circulate through the valves, tanks, and brake components. It replaces OEM part 109994 and is a common maintenance item on heavy-duty trucks running air brake systems.
Air systems naturally build moisture from compressed air. Without a working dryer cartridge, that moisture ends up traveling through the system where it can cause corrosion, frozen valves in winter, sticking components, and expensive brake problems.
A lot of air system issues start with a neglected dryer cartridge.
What the Part Does
The cartridge filters moisture, oil vapor, and contaminants out of compressed air before it reaches the rest of the air system.
Inside the cartridge is a desiccant material that absorbs moisture as air passes through. This helps keep the air tanks, brake valves, chambers, and airlines dry.
A healthy air dryer system reduces internal corrosion and helps sensitive brake components last longer.
This part works closely with brake system components like the Type 30 Spring Brake Chamber and gladhand air connections.
Common Problems This Part Solves
A failing or saturated air dryer cartridge can lead to:
- Excess moisture in air tanks
- Frozen air lines or valves in cold weather
- Corrosion inside brake components
- Oil contamination in the air system
- Slow or inconsistent air system performance
Drivers sometimes notice excessive water draining from tanks during inspections, which is often a sign that the dryer cartridge is overdue for replacement.
Why Replacement Matters
Once the desiccant inside the cartridge becomes saturated, it can no longer properly remove moisture from the system. At that point, water starts circulating through the brakes and valves.
Replacing the cartridge on schedule helps prevent expensive air system repairs and reduces the chance of cold-weather brake problems. It also helps extend the life of compressors, brake chambers, slack adjusters, and air valves throughout the truck.
Compatibility and Fitment
This air dryer cartridge replaces OEM part number 109994. Always verify the dryer model and cartridge style before ordering.
Different air dryer systems use different cartridge sizes and thread configurations.
Installation and Service Notes
Installation usually involves depressurizing the air system, removing the old cartridge, cleaning the mounting surface, and installing the replacement cartridge with the proper seal.
After installation, the air system should be checked for leaks and proper purge valve operation.
It’s also smart to drain the air tanks and inspect the system for excess moisture buildup during service. If large amounts of water are present, other dryer components may also need attention.
Use Case
Commonly replaced during preventive maintenance service, winter prep, DOT inspections, and repairs involving moisture contamination in the air system.
About Us
We’re a family-owned group of Peterbilt dealerships dedicated to getting you the parts you need quickly and affordably. Whether you’re looking for Paccar OEM parts, reliable aftermarket replacements, or popular upgrades like seats and filters, we make it easy to keep your truck running and on the road. If you don’t see what you need online, just give us a call or send an email — chances are we can get it. We pride ourselves on fast service, fair prices, and being a partner you can depend on when downtime isn’t an option.
