Maintenance & Adjustment
D760.H03E-001.H1907
203
CAUTION:
1.As per design requirements: if the diameter of cross slot on light
adjusting tool is not less than
Φ
6.5 mm, the tool may fail to reach
adjusting screw gear or even damage the light adjusting guide slot on
lamp housing, leading to light adjustment failure.
2.If the diameter of cross slot on light adjusting tool is less than
Φ
5.5
mm, the tool may be prone to slide in the guide slot, leading to light
adjustment failure. Before light beam adjustment, please set the
electric control switch for lamp motor as per complete vehicle design
to "ZERO" position, otherwise, the following problems may occur
during light adjustment: The light beam of lamp is barely regulated to
the lower limit of acceptable range required by testing equipment, but
when users try to adjust the light beam by controlling the lamp motor
through electric control switch after purchasing the vehicle, the light
beam deflects, resulting in visual non-conformity. B: After light
adjusting angle exceeds the design limit, the light beam still cannot be
regulated to the acceptable range required by the testing equipment.
Excessive adjustment will cause reflector damage, ball joint falling
and other defects.
3.It is recommended to perform light adjustment with manual
screwdriver.
Preparations
1. The site for light adjustment should be flat and the screen used should be vertical
to the site.
2. The vehicle should be unloaded with one driver seated and tire pressure kept
normal.
3. The vehicle should be vertical to the screen and the reference center of the
headlamp should be 10m away from the screen.
4. Draw a horizontal reference line on the screen. The height of the reference line
should be the same as the headlamp center ground clearance. Record this height
as H. Mark the position line for the left and right headlamp reference center on the
horizontal reference line according to the position of the vehicle headlamp.
Adjustment of low beam lighting position
Project the low beam to the screen in accordance with the following require-
ments:
Cover the right front combination lamp first to let no beam leak out, and adjust
the upward/downward light adjusting mechanism to make the height of the cut-off line
angle or the center point of the low beam of the left lamp be 0.6 H - 0.8 H; adjust the
leftward/rightward light adjusting mechanism to make the leftward horizontal deflection
of the low beam within 170 mm and the rightward deflection within 350 mm.
Summary of Contents for DFH4180 Series
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