AD-IS Air Dryer Cartridge 065225

Why the AD-IS desiccant pack matters

Compressed air on a Class 8 tractor is not optional background noise. It feeds brake valves, suspension controls, and dozens of small actuators that expect clean, dry volume. The Bendix AD-IS dryer head on many over-the-road cabs uses a replaceable desiccant cartridge rather than a throwaway spin-on can. That cartridge is the piece offered on this page: a desiccant element sized for AD-IS service.

Moisture in the tanks shows up as sluggish valves, ice in cold weather, and water blown out at the purge valve. Oil carryover from the compressor can foul desiccant faster than a calendar guess. Shops that only chase ABS lamps without looking at purge quality often replace valves when the dryer media is saturated.

This listing describes a desiccant cartridge for Bendix AD-IS air dryer maintenance. It is not a complete dryer assembly, coalescing filter, or governor. Match the stamp on the removed element and the dryer model cast into the head before you order.

Published chassis examples

The fitment table on this product card names Freightliner, Kenworth, Peterbilt, and Volvo tractors with engine rows marked All. Those examples help you narrow a search when the old cartridge is missing. They do not certify that every year and axle combination in a fleet will accept the same element length or seal stack.

Verify fit using the part number embossed on the spent cartridge, build data from the VIN when available, and a side-by-side comparison on the bench. Photograph the dryer nameplate and the old media canister before you discard shop rags soaked with purge oil.

Use the fitment guide when you are comparing several dryer service kits across multiple units. Email support@aonetruckauto.com with VIN and stamp photos if the table row and the truck disagree.

Weight, price, and carton handling

The published ship weight is 8.5 lb. Treat that figure as a planning number for parcel rating and shelf space, not as a performance rating for the desiccant itself. The listed price is $89.95 USD before tax; tax depends on the ship-to state and is confirmed before dispatch.

Ground parcel is the usual movement when dimensions stay within carrier limits. Oversize or palletized freight is quoted separately after you approve the handling class. Read the shipping policy before you commit a maintenance lane to a delivery date.

Purge path inspection after cartridge service

After you install a fresh desiccant pack, the meaningful functional test is at the air dryer purge valve, not a guess about months on the road. Build system pressure with the engine at governed rpm, then watch the purge cycle at the AD-IS outlet.

Purge air should not carry a steady stream of dark oil or a mist that leaves wet spots on cardboard under the exhaust port. If oil appears immediately after service, trace compressor discharge and the coalescing section before you blame new media.

Bench steps worth repeating every time

• Relieve tanks and tag the parking brake state so no one applies spring brakes mid-job.
• Capture oil from the purge path during removal so it does not soak harnesses or frame rails.
• Seat O-rings dry and finger-tight only until the cover aligns; final torque belongs to the Bendix procedure for that head.
• Leak-down the supply side after reassembly and log the result on the work order.

Document the dryer model and cartridge stamp on the invoice packet. Fleets auditing PM compliance will ask for that pairing during a roadside review.

Storage and receiving

When the carton arrives, compare the label to your purchase order and inspect desiccant bags for punctures. Desiccant exposed to humid shop air for weeks may be compromised even if the box looks fine. Store upright in a closed cabinet away from compressor wash spray.

Unused returns follow the window on the returns and refunds page. Opened dryer media may be non-returnable once the foil or bag seal breaks; read that policy before you cut packaging.

Ordering checklist

Confirm AD-IS marking on the dryer, compare the removed cartridge height and seal groove to the new unit, and only then add quantity to cart. PayPal totals reflect unit price times quantity after capture completes on this site.

Questions about table rows versus a oddball spec go to support@aonetruckauto.com or the contact form with photos attached.

Air supply habits that protect desiccant life

Fleets that drain tanks on a written schedule see fewer emergency dryer swaps than fleets that only react to wet purge events. Draining is not glamorous work, yet it keeps oil emulsion and water slugs from reaching the desiccant bed prematurely. Pair tank maintenance with compressor intake hygiene so road grit does not accelerate wear on the source side.

When a tractor returns from a rental pool or regional swap, treat the dryer cartridge as unknown history even if the odometer looks low. Unknown history means verify purge quality and inspect for non-factory plumbing before you sign off a PM line.

Technicians should note governor cut-in and cut-out on the work order whenever dryer service occurs. Wide spreads sometimes indicate upstream leaks that mimic media failure.

AD-IS cartridge oil clues

Oil-wet desiccant on an AD-IS cartridge is a compressor conversation. Replace the cartridge, then schedule compressor health checks before the new media soaks again.

Purge valve icing in winter often follows a dryer that never got a fresh cartridge before the first hard freeze.

Packaging and carrier options are described on the shipping policy. Return eligibility is on returns and refunds. Questions: support@aonetruckauto.com.

HEAVY TRUCK PARTS, INC. operates A-One Truck Auto. Truck and brand names here describe compatibility only; we are an independent seller.