7.5.3. Adjustment of light of headlights

The direction of light bunches of headlights has to be such that the road in front of the car was well lit, and drivers of counter transport were not blinded at inclusion of passing beam.

Fig. 7.23. Adjusting screws of block headlights: 1 – the screw of adjustment of a beam of light in the vertical plane; 2 – the screw of adjustment of a beam of light in the horizontal plane; 3 – screws of fastening of a casing; 4 – protection cover

Headlights by rotation of screws 1 and 2 (see fig. 7.23) which turn an optical element in the vertical and horizontal planes are regulated.
It is the most convenient to regulate headlights by means of mobile optical devices. If they are absent, then adjustment can be carried out by means of the screen.
Put completely filled and equipped car with load of 750 N (75 kgfs) on sitting of the driver on the flat horizontal platform in 5 m from a smooth wall or any screen (a board of plywood about 2х1 m in size, etc.) so that the car axis to it was perpendicular. Before a marking of the screen make sure that air pressure in tires normal, and then rock the car sideways that springs of suspension brackets were established.

Fig. 7.22. Scheme of adjustment of light of headlights

Draw vertical lines on the screen (fig. 7.22): axial About and the lines A and B passing through the points E corresponding to the centers of headlights. These lines have to be symmetric to rather axial line of the car. At height corresponding to distance of the centers of headlights from a floor draw a line 1 and below it on 65 mm the line of 2 centers of light spots.
If on the car there is a hydroproofreader of headlights, then install his handle on dashboards in the situation corresponding to car loading one driver.
Turn on passing beam of headlights. Consistently, at first for a right headlight (left is closed by a piece of a cardboard or dark matter), and then for left (right is closed) adjust screws 1 (fig. 7.23) and the 2nd light bunches of headlights.
At the adjusted headlights the upper bound of light spots has to coincide with the line 2 (see fig. 7.22), and points of intersection of horizontal and inclined sites of light spots — with points E.