Product Description
The Bendix 5004049 AD-IS Air Dryer Governor and Delivery Check Valve Replacement Kit is a genuine Bendix service kit designed to restore proper air pressure regulation and delivery check valve operation in compatible AD-IS air dryer systems. This kit provides the components needed to replace both the compressor governor and delivery check valve without replacing the complete air dryer assembly.
The governor plays an essential role in the vehicle's compressed air system by controlling when the air compressor loads and unloads. As system pressure reaches the specified cut-out pressure, the governor signals the compressor to stop supplying compressed air and initiates the air dryer's purge cycle. When pressure decreases to the cut-in threshold, the governor allows the compressor to resume charging the system.
The delivery check valve helps prevent compressed air from flowing backward through the air dryer during the purge cycle. Together, these components help maintain proper system pressure, dependable compressor cycling, and efficient air dryer operation.
-
Genuine Bendix AD-IS governor and delivery check valve replacement kit
-
Manufacturer Part Number: 5004049
-
Designed for compatible Bendix AD-IS air dryer systems
-
Includes replacement air compressor governor
-
Includes delivery check valve service components
-
Includes governor mounting gasket
-
Includes replacement O-rings and sealing components
-
Includes check valve spring and valve body
-
Includes governor adapter components and breather
-
Special AD-IS governor gasket material
-
Helps restore proper compressor cut-in and cut-out operation
-
Prevents reverse airflow through the air dryer during purge cycles
-
Supports proper compressed air pressure retention
-
Allows servicing without replacing the complete air dryer
-
Suitable for commercial truck and heavy-duty air brake maintenance
-
New replacement kit
-
Sold individually
The Bendix 5004049 combines the governor replacement and delivery check valve maintenance components into a single service package. It is particularly useful when troubleshooting improper compressor cycling, air system leakage, or problems involving the AD-IS governor and delivery check valve.
Bendix service documentation identifies the special governor mounting gasket as part number 5007834 and the delivery check valve maintenance kit as part number 5004052. The AD-IS governor mounting gasket must not be replaced with a standard governor gasket.
Before ordering, verify the original air dryer configuration and governor requirements. Bendix AD-IS systems use specific governor settings, and replacement components must match the intended air brake system configuration.
Always depressurize the entire air brake system before servicing. After installation, check compressor cut-in and cut-out operation, inspect for air leaks, and verify proper air dryer purge operation according to Bendix service procedures.
