TM 9-2320-211-20
diagram (fig. 2-157) for aid
in laying out the ad-
b. Installing Sealed-beam Lamp Unit.
justment lines.
(1) Connect the three cables at the waterproof
connectors (fig. 2-155), and position the lamp unit
(3) Measure the height
of the headlight center
from the floor, and mark a
horizontal line (X-X) at
in the headlight body.
this height on the vertical
surface.
(2) Position the retaining ring (fig. 2-155),
and secure it with three screws.
(4) Mark a line (A-A) one-twelfth of the
(3) Position the headlight rim (fig. 2-154),
distance between line X-X and the floor below line
x-x.
and secure it with three screws.
(5)
c. Adjusting Headlights.
Draw vertical lines (B-B and C-C) directly
(1) Headlight beam direction is changed by
in front of each headlight.
two lamp-unit adjtisting screws located behind the
(6) Turn on the headlights at the light switch,
holes in the rim; one at the top and one on the side
and select the high beam with the headlight beam
selector switch.
the direction of the beam vertically, and turn the
(7) Cover one headlight while adjusting the
side adjusting screw to change the direction
other. Aim the headlight so that the center of the
horizontally. Adjust the lights as detailed below.
hot (brightest) spot registers with the intersecting
(2) Place the unloaded vehicle on a smooth
lines (A-A and B-B, or A-A and C-C respectively).
level surface so that the headlights are 25 feet away
(8) After each light is aimed separately, check
from a vertical wall or other vertical surface. The
both lights simultaneously for conformity to line A -
centerline of the vehicle must be at right angles to
A.
t h e vertical surface. Use the headlight aiming
