Belarus 1523, Operating Manual

Page: 289 / 312

BELARUS- 1523/1523В /1523.3 /1523В.3 Scheduled Maintenance
278
Procedure 63. Aiming External Side
Headlights
• Mark out a screen, as shown in the
Figure.
• Measure the distance between the
headlight centres and the height of
their location above the floor immedi-
ately on the tractor, the tyre pressure
shall correspond to the recommended
norms. Mark the headlight centre lines
А - А, B -B
1
, Е - Е
1
.
• Place the tractor on a flat level ground
at exactly right angle to the screen,
with the front headlight lenses 15 m
away therefrom. At the same time, be
sure that the tractor’s line of longitudi-
nal symmetry would intersect with the
screen at the line O-O
1
.
• Turn on the headlights in low beam
and, first, adjust the position of one
headlight (block the other headlight
with a dark tissue), then, the other,
having loosened them on the bracket.
•
The headlight is considered as cor-
rectly adjusted, if the light spot centre
line D-D is at half distance from the
reference surface to headlights centre-
line A-A (h/2).
Peculiarities of adjustment of the
built-in headlights
• Place the tractor at the distance of 10
m from the screen to the headlight
lenses.
• Perform all the operations for marking-
out the screen as described above.
• The headlight beam is aimed cor-
rectly, if the location of the light spots
of both headlights corresponds to the
position shown in the above Figure,
and the light spot centreline D-D is be-
low the headlight centreline А - А by
150 mm.
Screen marking-out and adjustment of head-
lights:
А - А – headlight centre line;
D-D – centre line of light spots;
О - О
1
– line of symmetry of the screen;
В - В
1
– vertical axis of a light spot from the left-
hand headlight;
Е - Е
1
– vertical axis of a light spot from the
right-hand headlight;
С – distance between headlight centres;
h – distance from the floor to side headlight
centre line.