Lit. No. 28270, Rev. 00
July 1, 2005
15
VEHICLE LIGHTING CHECK
Check the operation of vehicle and
plow lights with plow mounted to
vehicle and all harnesses connected.
• Turn Signals and Parking Lamps
• Headlamps
• Daytime Running Lamps (DRLs)
• Joystick Control or
CabCommand Control
The control indicator light should
light whenever the control
ON/OFF switch and the ignition
(key) switches are both in the
ON Position. The snowplow
electrical plugs must be
connected to the vehicle
electrical plugs.
SYSTEM OVERVIEW – BLADE, T-FRAME & LIFT ASSEMBLIES
HEADLAMP BEAM AIMING
Torque 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
specification #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 inflation pressures to
the values specified 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 specified
in the Selection List.
e. Check functioning of any
automatic vehicle leveling
systems and specific
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.
4. Mark (or tape) the vertical
centerline of the snowplow
headlamps and the vertical
Vertical
Centerline
ahead of DS
Snowplow
Headlamp
Align with
vehicle
centerline.
Vertical
Centerline
ahead 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
centerline of the vehicle on the
screen. Mark the horizontal
centerline of the snowplow
headlamps on the screen
(distance from ground to snow-
plow headlamp centers).
5. Align the top edge of the high
intensity zone of the snowplow
lower 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.)
