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HEADLAMP AIMING PROCEDURE
1.
Park the vehicle with the plow attached on a
level surface 25 ft (7.6 m) from a fl at, unob-
structed light-colored wall.
With no load on the vehicle other than the
driver, snowplow and rear ballast weight, in-
spect the vehicle for proper tire infl ation and
broken or sagging suspension components.
Check functioning of any automatic vehicle
leveling systems and any specifi c manu-
facturer's instructions pertaining to vehicle
preparation for headlamp aiming. Stabilize
the suspension by rocking the vehicle side-
ways.
2.
Mark a vertical line (line 1) on the wall with
black tape, or other means, directly ahead of
the center of the vehicle.
Mark two additional vertical lines (lines 3 and
4) off set 20 1/2 inches (52 cm) from the fi rst
line representing the distance between the
two plow headlamps.
3.
Measure the height from the ground to the
center of the plow headlamps, then mark
a horizontal line (line 2) on the wall at that
same height.
Headlamp Aiming Procedure 23
4.
Refer to the following chart then mark a sec-
ond horizontal line below the fi rst (line 5), as
required.
Headlamp Centerline Height
22 to 36 in (56 to 90 cm)
36 to 48 in (90 to 120 cm)
48 to 54 in (120 to 140 cm)
5.
Wipe the lamp lenses clean and check for
proper switching and function.
Activate the plow lamp HIGH beams to il-
luminate toward the wall. Focus the center
of the LH light beam on the intersection of
lines 3 and 5. Focus the center of the RH
light beam on the intersection of lines 4 and
5.
Tighten the headlamp mounting hardware
to 70 ft.-lbs. (95 N-m) maximum to hold the
headlamps in position.
Vertical Aim Down
0
2 in (5 cm) Down
4 in (6.4 cm) Down
DWG NO. 6598A
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