Replacement of the Cab Fresh-Air Filter
p4
mm 83.02
The HVAC system has three filters that must be replaced periodically to maintain proper system operation. The cabin fresh-air-intake filter is accessed from under the hood, and the recirculation filter is accessed from inside the cab. The sleeper air filter is accessed through an access panel on the cabinet behind the driver's seat.
- Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
- Open the hood.
- Remove the self tapping screw.
- Remove the intake filter access panel. Slide it down until it comes loose. See Fig..
- Remove the filter from the slot. Note the airflow directional arrow on the filter's edge. When properly installed, the airflow arrow will point inboard, toward the engine. See Fig..
- Put a new filter in the slot, making sure the airflow arrow is correctly oriented, and install the access panel. Make sure the access panel locks into position.
- Install a new self tapping screw (part number: 23-12187-050). Tighten the screw 12 to 17 lbf·in (135 to 192 N·cm). See Fig. .
Important: When replacing the air filter, use only a Freightliner-approved air filter.
Note: