Replacement of the Cab Fresh Air Filter

122SD mm 83.02.02

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

    Notice: If equipped with a fresh air filter, it should be replaced every six months, more often if the vehicle is operated under extreme conditions. If the fresh air filter is not replaced at proper intervals, damage to the heater and air conditioner components could occur.

  1. Apply the parking brakes and chock the tires.
  2. Lift the wire retainer on the air filter cover up and over the upper edge of the cover and pull the wire retainer down; see Fig..

    1. Air Filter Cover

    2. Wire Retainer

    Fig. 1, HVAC Air Intake Plenum

  3. Note the direction of the arrow on the air filter cover, then remove the cover and the attached filter.
  4. Remove the air filter from the air filter cover. Discard the air filter.
  5. Attach a new air filter to the air filter cover. Make sure the arrow on the filter is pointing in the same direction as the arrow on the cover.
  6. Install the air filter and air filter cover in the HVAC air intake plenum.
  7. Pull the wire retainer up and over the upper edge of the air filter cover.
Note:
Parent topic: Air Filter Replacement
Document Number: 0000126076
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-06-21