TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 1255 of 1417
ALIGNMENT
1.
Draw a horizontal line (Figure 5, Item 1) on a wall the height of center of headlights (Figure 5, Item 4).
2.
Park truck facing wall so headlights (Figure 5, Item 4) are 25 ft (7.6 m) from wall.
3.
Draw a vertical line (Figure 5, Item 6) through horizontal line (Figure 5, Item 1) so it is in line with center of
headlight (Figure 5, Item 4).
4.
Turn headlights on low beam (TM 9-2320-260-102).
5.
Adjust headlight horizontal direction with adjusting screw (Figure 5, Item 2) until left edge of bright light area
(Figure 5, Item 5) on wall is 2 to 6 in. (5.08 to 15.24 cm) right of vertical line (Figure 5, Item 6).
6.
Adjust headlight vertical direction with adjusting screw (Figure 5, Item 3) until top edge of bright light area
(Figure 5, Item 5) on wall is touching lower side of horizontal line (Figure 5, Item 1).
7.
Adjust other headlight using same procedure.
M0265DAA
4
3
2
5
6
4
4
5
6
1
Figure 5.
Headlight Alignment.
END OF TASK
TM 9-2320-272-23-2
0325
0325-6
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