Meritor

1. Park the vehicle on a level surface. Apply the parking brakes and chock the tires.
2. Remove the element from the air filter/regulator assembly. Inspect the O-rings in the end cap; replace worn or damaged O-rings. Inspect the element for fluid contamination. If fluid is present, replace the element. Inspect the air supply system for the source of the fluid, and service it as needed.
3. Install the element in the filter/regulator assembly.
4. Apply a light coat of silicone grease, or an equivalent grease to the O-rings in the end cap. Install and tighten the end cap 10 to 15 lbf·ft (14 to 20 N·m).
5. Build air pressure in the system, check for leaks, and make any needed repairs.