Adjusting the Headlight Aim

p3 dm 23.03.001

Note:  Freightliner vehicles are offered with various headlight assembly options. Because of the various options, the location of adjustment screws on your vehicle's headlight assembly may vary from what is shown here.

The adjusting screw is located on the lower outside corner of the headlight assembly. See Fig.. Turn the adjusting screw clockwise to raise the beam and counterclockwise to lower it, until the beam pattern meets the acceptable standard.

Fig. 1, Headlight Adjusting

Table 1, Vertical Low-Beam Headlight Variation Limits

Vertical Low-Beam Headlight Variation Limits

Distance Between Ground and Headlight: in (mm)

Desired Variation ( see Fig., item 2): in (mm)

Upper Limit ( see Fig., item 1): in (mm) up

Lower Limit ( see Fig., item 3): in (mm) down

22–36 (560–900)

0

3.9 (100)

3.9 (100)

36–48 (900–1200)

2 (50) down

2 (50)

6 (150)

48–54 (1200–1400)

4 (101.6) down

1.6 (40)

6.5 (165)

    Table 1, Vertical Low-Beam Headlight Variation Limits

    1. Low-Beam Angle Upper Limit

    2. Ideal Low-Beam Projection

    3. Low-Beam Angle Lower Limit

    Fig. 2, Vertical Low-Beam Headlight Variation Limits

    Note:
    Parent topic: Headlight Aiming
    Document Number: 0000112703
    Manual Publication Date: 2025-02-11
    Topic Publication Date: 2024-05-06