Replacement Cab Recirculation-Air Filter

p3 mm 83.02.001

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.

The recirculation air filter is located on the "back" side of the evaporator housing, in the corner formed by the frontwall and the right side of the cab. It is accessed from the underside of the unit. It is a coarse sponge, or fiber, filter. See Fig..

  1. Filter

Fig. 1, Cab Recirculation Air Filter (shown out of the vehicle for clarity)

Important: When replacing the air filter, use only a Freightliner-approved air filter.

Note: Filter replacement is done "blind."

  1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
  2. Loosen the passenger-side kick panel, tilt it out, and carefully twist and remove the light bulb socket from the lens on the back of the panel. Move the panel out of the way. See Fig..

    1. Kick Panel

    2. Side Trim Panel

    3. Step Plate

    4. Door Seal

    Fig. 2, Panels

  3. Remove the door step plate, and then pull the door seal loose from the bottom of the door opening to just above the filter area.
    Remove the A-pillar trim panel. Remove the screw (located under the step plate) and disengage the spring clips by pushing the panel towards the center of the cab.
  4. Remove the filter from the intake recess in the back of the plenum. Pull it loose along the bottom edge of the recess, and slide it straight down. See Fig..
  5. Slide a new filter up into the recess slots of the plenum. Be sure that it fully seats into the slot all the way around the opening.
  6. Install the A-pillar trim panel, then the door seal, and finally, the door step plate.

    1. Filter

    Fig. 3, Removing the Cab Filter

  7. Position the passenger-side kick panel, and install the light bulb socket in the lens, then fasten the panel.
Note:
Parent topic: Replacement of the Air Filter
Document Number: 0000116540
Manual Publication Date: 2024-05-15
Topic Publication Date: 2024-11-22