Product Description
The Bendix 5004052 AD-IS Air Dryer Delivery Check Valve Repair Kit is a genuine replacement service kit designed for compatible Bendix AD-IS air dryer and reservoir systems. This kit provides the components needed to service the delivery check valve assembly, helping restore proper airflow control and pressure retention within the commercial vehicle's compressed air system.
The delivery check valve helps prevent compressed air from flowing backward through the air dryer during its purge and regeneration cycle. When the check valve becomes worn, contaminated, or damaged, it can contribute to air leakage, improper pressure retention, and air dryer operating problems.
The Bendix 5004052 allows technicians to service the delivery check valve without replacing the complete AD-IS air dryer assembly, making it a practical solution for commercial truck repair shops and fleet maintenance operations.
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Genuine Bendix delivery check valve repair kit
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Manufacturer Part Number: 5004052
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Designed for compatible Bendix AD-IS air dryer assemblies
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Includes replacement check valve body
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Includes check valve spring
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Includes large and small O-rings
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Includes governor mounting gasket
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Includes assembly lubricant
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Helps prevent reverse airflow through the air dryer
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Supports proper compressed air pressure retention
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Helps restore dependable air dryer operation
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Suitable for heavy-duty commercial truck air brake maintenance
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Replacement components for the delivery check valve assembly
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Complete governor and air dryer not included
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Sold individually as one repair kit
The 5004052 kit services the delivery check valve portion of the AD-IS assembly. It does not include a replacement compressor governor.
For applications requiring replacement of both the governor and delivery check valve, Bendix identifies part number 5004049 as the combined governor and check valve replacement kit.
Before ordering, verify the original air dryer model and required service components. Bendix AD-IS air dryers contain several different pneumatic valves, including pressure protection and purge valves, that require different replacement parts.
Depressurize the entire air brake system before servicing and follow the applicable Bendix installation, lubrication, and leak-testing procedures.
Bendix identifies 5004052 as the AD-IS delivery check valve maintenance kit, with the gasket, O-rings, spring, valve body, and grease shown in its service documentation.
