Figure 8.20. Headlight Beam Adjustment Screws: A - in the vertical plane; B - in the horizontal plane
Headlights are adjusted by turning screws A and B (see Figure 8.20), which rotate the optical element in the vertical and horizontal planes.
It is most convenient to adjust the headlights with the help of mobile optical devices. If they are not, then the adjustment can be carried out using the screen.
Install the unladen vehicle on a flat horizontal platform at a distance of 5 m from a smooth wall or screen (plywood shield about 2x1 m in size, etc.) so that the axis of the car was perpendicular to it. Before marking the screen, make sure that the air pressure in the tires is normal, then rock the car front and rear to set the suspension springs.
Measure the height of the headlight centers from the ground on your vehicle. This will be the distance h on the screen.
Figure 8.60. Headlight adjustment scheme: C - the distance between the optical centers of the headlights
Draw on the screen, as shown in Figure 8.60, vertical lines - center 0 and lines A and B passing through the points corresponding to the centers of the headlights. These lines must be symmetrical about the center line of the vehicle. At a height corresponding to the distance of the centers of the headlights from the floor, draw line 1 and below it by 120 mm line 2 of the centers of light spots.
Turn on low beam headlights. Sequentially, first for the right headlight (the left one is closed with a piece of cardboard or dark matter), and then for the left (right closed) adjust with screws A (see Figure 8.20) and In the headlight beams. For adjusted headlights, the upper border of the light spots must coincide with line 2 (see Figure 8.60), and the points of intersection of the horizontal and inclined sections of the spots - with lines A and B.