Description: AD-9 Air Dryer 12V For Freightliner, Mack, International, Volvo/White, Meritor/Rockwell
Condition: New
Brand: Bendix
Part Number: 109689X
Fitment Guide:
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Freightliner, Mack, International, Volvo/White, Meritor/Rockwell, and similar vehicles that use Bendix‑style air dryers
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Specifications:
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Heater Voltage
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12 Volt
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Heater Watts
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75 Watt
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Supply
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1/2" NPT
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Delivery
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1/2" NPT
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Control
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1/4" NPT
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A Bendix AD-9 Air Dryer is a heavy-duty truck air system component that removes moisture, oil vapor, and contaminants from compressed air before the air goes into the air brake system.
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Dry the compressed air
- Removes water vapor from air coming from the air compressor.
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Filter contaminants
- Traps oil mist, dirt, and debris before they enter the system.
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Protect air brake components
- Helps prevent corrosion and damage to valves, tanks, and brake chambers.
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Prevent freezing in cold weather
- Stops water from freezing inside air lines and valves.
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Improve brake system reliability
- Keeps air pressure systems operating consistently and safely.
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Reduce maintenance costs
- Less moisture means fewer repairs and less manual draining of air tanks.
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Extend component lifespan
- Air tanks, valves, ABS components, and compressors last longer.
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Signs of Faulty:
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Air leak from purge valve
- Constant hissing from the bottom of the dryer.
- One of the most common signs.
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Frequent or abnormal purging
- Dryer purges too often, weakly, or continuously.
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Slow air pressure build-up
- Truck takes longer than normal to reach operating air pressure.
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Excess moisture in air tanks
- Water drains out of tanks frequently.
- Indicates the desiccant is no longer drying air properly.
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Oil contamination in air system
- Oily residue in tanks or valves.
- Can indicate compressor or dryer failure.
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Frozen air lines or valves (cold weather)
- Moisture bypasses the dryer and freezes in the system.
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Air governor cycling issues
- Compressor cuts in/out improperly due to dryer problems.
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Brake system problems
- Sticky valves, sluggish brakes, or ABS faults caused by contamination.
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Low air pressure warnings
- Dash air pressure alarms or warning lights.
- Compressor overworking or overheating
- Faulty dryer can increase compressor workload.
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Manufacturer information
A part of the Knorr-Bremse Group, Bendix® provides the automotive and truck parts industry with cutting-edge energy management solutions, active safety technologies, and air brake charging for tractors, buses, commercial vehicles, trailers, as well as medium- and heavy-duty trucks throughout North America. Headquartered in Elyria, Ohio, Bendix Commercial Vehicle Systems employs over 3,200 people who work hand in hand for the accomplishment of the brand's vision: "to become the leading worldwide supplier of active vehicle safety systems within the commercial vehicle industry." This brand takes pride in being the first to introduce many notable parts and technologies to the North American commercial vehicle market. Among these many firsts are the groundbreaking air brake system technologies such as air dryers, air compressors, and ABS. At Bendix, exceeding industry standards is a strict requirement.
Warranty
First Truck Parts offers a 365-days warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.
