b. Replacement. Replace defective parts.
4-74. Headlight Adjustment
c. Installation. Install marker, blackout, or head-
a. Position the carrier on a flat and level surface at
right angles to, and 25 feet from a suitable vertical
surface. Use the headlight adjusting diagram, figure 4-
71, for aid in laying out adjustment lines.
Figure 4-71. Headlight adjusting diagram.
b. Measure height of headlight center from floor,
and mark an horizontal line (X-X) at this height on
c. Mark line (A-A) one-twelfth of distance between
line (X-X) and floor, below line (X-X).
d. Draw vertical lines (B-B) and (C-C) directly in
front of each headlight.
e. Turn on headlights and select high beam.
f. Remove headlight rim.
g. Turn top adjusting screw in or out for vertical
adjustment and turn side screw for horizontal adjustment
of sealed beam. Use a cover to cover one headlight
while aiming the other.
h. Replace the headlight rim.
4-75. Dome Light
a. Removal Remove dome light as illustrated in
b. Installation. Install dome light as illustrated in
Figure 4-72. Dome light, removal and installation.