TR801266 AD-IS Air Dryer Fit Freightliner Classic, Kenworth and Peterbilt

It removes moisture and contaminants from compressed air before it reaches the air tanks and valves. This helps reduce corrosion and prevents freeze-ups in cold weather, improving braking reliability. A properly functioning semi truck air dryer also helps protect downstream air system components.

This AD-IS air dryer is listed to fit Freightliner Classic, Kenworth, and Peterbilt applications. For an air dryer for peterbilt 379 or a kenworth air dryer fitment, confirm the part number TR801266 matches your existing unit and port configuration. It may also be used as an air dryer for kenworth or freightliner air dryer replacement when the application matches.

Many AD-IS air dryer setups allow service of wear items like the air purge valve and related seals, depending on the exact configuration. If you’re experiencing frequent purging, air leaks, or moisture carryover, inspect the purge area and consider a rebuild kit or replacement. When in doubt, match service parts to the specific bendix air dryer style and TR801266 application.