Replacement of the Cab Fresh-Air Filter

57X mm 83.02.002

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

  1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
  2. Open the hood.
  3. Remove the self tapping screw.
  4. Remove the intake filter access panel. Slide it down until it comes loose. See Fig..

    1. Self Tapping Screw

    Fig. 1, Intake Filter Access Panel

  5. 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..

    1. Airflow Directional Arrow

    Fig. 2, Airflow Directional Arrow

  6. 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.
  7. Install a new self tapping screw (part number: 23-12187-050). Tighten the screw 12 to 17 lbf·in (136 to 192 N·cm). See Fig..
Note:
Parent topic: Air Filter Replacement
Document Number: 0000116843
Manual Publication Date: 2024-05-13
Topic Publication Date: 2025-04-05