Lit. No. 49513, Rev. 00 79 August 15, 2011
MAINTENANCE
AIMING HEADLAMP BEAMS
Tighten headlamp fasteners to 45 ft-lb once
correct visual aim is achieved.
1. Place vehicle on a level surface 25 feet
in front of a matte-white screen, such
as a garage door. The screen should be
perpendicular both to the ground and to the
vehicle centerline.
2. The vehicle should be equipped for normal
operation. The snowplow blade should be in
place and in raised position. Below are steps
listed by the Society of Automotive Engineers
(SAE) pertinent to headlamp aiming in
specifi cation #SAE J599d.
3. Prepare vehicle for headlamp aim or
inspection. Before checking beam aim, the
inspector will:
a. Remove ice or mud from under fenders.
b. Set tire infl ation pressures to the values
specifi ed on vehicle information label.
c. Check springs for sag or broken leaves.
d. See that there is no load in the vehicle
other than the driver and ballast as
specifi ed in the Selection List.
e. Check functioning of any automatic
vehicle leveling systems and specifi c
manufacturer's instructions pertaining to
vehicle preparation for headlamp aiming.
f. Clean lenses.
g. Check for bulb burnout and proper beam
switching.
h. Stabilize suspension by rocking vehicle
sideways.
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