Preliminary Checks

108SD d 23.01.000

Before checking or adjusting the headlight aim, complete the following inspection:

  • Check that the hood is closed and latched.

  • Remove any large amounts of mud or ice from the underside of the fenders.

  • Check the springs for sagging or broken leaves.

  • Check the suspension for proper functioning of the leveling mechanism. On cabs with air suspensions, make sure that the height is properly adjusted.

  • Check for damage to the hood and hinge assembly. Repair as necessary.

  • With the vehicle unloaded, check that the tires are inflated to the recommended air pressure.

  • Clean the headlight lenses. Use a soft cloth with mild, non-caustic soap or detergent, and water.

  • Measure the distance from the ground to the center of each headlight bulb.

  • Mark where the center of each headlight projection should appear.

  1. Screen or Wall

  2. Center of Right-Hand Headlight Projection

  3. Center of Left-Hand Headlight Projection

Fig. 1, Headlight Aiming Screen/Wall

Note:
Document Number: 0000111275
Manual Publication Date: 2024-09-03
Topic Publication Date: 2024-05-02