Blizzard 57520-1, Owner'S Manual

Page: 30 / 40

Lit. No. 40688, Rev. 04 30 May 1, 2012
MAINTENANCE
AIMING HEADLAMP BEAMS
Tighten headlamp fasteners to 45 ft-lb once correct
visual aim is achieved.
1. Place the vehicle on a level surface 25 feet in front
of a matte-white screen, such as a garage door.
The screen should be perpendicular to both the
ground and 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 speci
fi cation
#SAE J599d.
3. Prepare the vehicle for headlamp aim or
inspection. Before checking the beam aim, the
inspector will:
a. Remove ice or mud from under fenders.
b. Set tire in fl ation pressures to the values
speci fi 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 speci fi ed in the
Undercarriage Selection Guide.
e. Check functioning of any automatic vehicle
leveling systems and speci fi c manufacturer's
instructions pertaining to vehicle preparation
for headlamp aiming.
f. Clean the lenses.
g. Check for bulb burnout and proper beam
switching.
h. Stabilize the suspension by rocking vehicle
sideways.
4. Mark (or tape) the vertical centerline of the
snowplow headlamps and the vertical centerline
of the vehicle on the screen. Mark the horizontal
centerline of the snowplow headlamps on the
screen (distance from ground to snowplow
headlamp centers).
5. Align the top edge of the high-intensity zone of
the snowplow low beam below the horizontal
centerline and the left edge of the high-intensity
zone on the vertical centerline for each snowplow
headlamp. (Refer to diagram below.)
Vertical centerline of
DS snowplow headlamp
Align with vehicle
centerline
Vertical centerline of
PS snowplow headlamp
Screen located 25 feet
from snowplow headlamps
Horizontal centerline
of snowplow headlamps
High-intensity zones of snowplow
headlamps on low beam