Removal Procedure
- Block the wheels.
 
- Drain all the reservoirs. Refer to 
Draining Reservoirs 
.
 
- Use a large filter wrench to remove the
air dryer desiccant cartridge.
 
- Remove the air dryer desiccant cartridge.
 
Installation Procedure
- Install the air dryer desiccant cartridge
to the air dryer.
 
- Tighten the air dryer desiccant cartridge by hand. DO NOT over tighten.
 
- Start the engine.
 
- Charge the system air pressure to the governor cut-out point.
 
- Inspect for leaks with a soap solution and repair, as needed.
 
- Remove the wheel blocks.