4-48. SERVICE HEADLIGHT LAMP MAINTENANCE (Cont'd)
TM 9-2320-280-20-2
Change 2
4-79
c. Adjustment
NOTE
• Headlamp alignment is the same for both headlamps.
• Inflate tires on vehicle before starting procedure
(TM 9-2320-280-10).
• Measured height (H) varies depending on model of vehicle
and load configuration.
1.
Position vehicle on level ground 25 ft (8 M) from and facing a vertical wall.
2.
Measure height (H) from ground up to center of lamp (3).
3.
Using chalk, draw a horizontal line across vertical wall at center height (H) of lamp (3).
4.
Draw a vertical line through horizontal line for center position (C) of vehicle.
5.
Measure distance from center to center of lamp (3) and divide measurement in half.
6.
Draw two vertical lines (D) at equal distance from center position line (C).
7.
Measure down 1/12 from horizontal line (H) and mark horizontal lines through lamp vertical
lines (D).
8.
Turn headlamps on low beam and block out one lamp (3).
9.
Adjust lamp (3) using vertical adjusting screw (8) and/or horizontal adjusting screw (9) until center
of lamp beam is aligned with lower horizontal and vertical lines.
10.
Repeat steps 8 and 9 for other lamp (3).
FOLLOW-ON TASK: Check headlight lamp for proper operation (TM 9-2320-280-10).
