freightliner PX113064S T 2016, Manual

Page: 178 / 236

Before Checking the Headlight
Aim
Do the following before checking or adjusting the
headlight aim.
•
Clean the headlight lenses. Use a soft cloth
with mild, non-caustic soap or detergent, and
water.
•
Remove any large amounts of mud or ice from
the underside of the fenders.
•
Check for damage to the hood and hinge
assembly. Repair as necessary.
•
Check that the hood is closed and latched.
•
Check the springs for sagging or broken
leaves.
•
Check the suspension for proper functioning of
the leveling mechanism. On cabs with air
suspensions, make sure that the height is
properly adjusted.
•
With the vehicle unloaded, check that the tires
are inflated to the recommended air pressure.
Checking the Aim of the
Headlights
1.
Park the vehicle on a level surface 25 ft (7.6 m)
away from, and perpendicular to, a vertical
screen or wall. Shut down the engine and set the
parking brake. Chock the tires.
2.
Each headlight has a height adjusting dot on the
lens as shown in
Fig. 15.1 . Measure the
distance from the ground to the height adjusting
dot on each headlight See
Fig. 15.2 , item A.
Make a note of these measurements.
3. On the screen or wall, mark the locations of each
headlight bulb center using the measurements
found in step 2. See
Fig. 15.2 , items 2 and 3.
4. Turn on the low-beam headlights.
5.
Check the vertical adjustment of the low beams.
The center of each beam projection should fall
on or near the marks made during step 3. See
Fig. 15.3 .
6. Use Table 15.1 to determine the maximum
vertical distance allowable between the marks on
the wall and the center of each low-beam
projection.
If the distance between either projection center
and the mark made on the wall or screen is
greater than the maximum distance given in
Table 15.1 , adjust the vertical positioning of that
headlight.
f546613 09/21/2016
A
A. The height adjusting dot is located in front of the
low-beam lamp on the headlight lens.
Fig. 15.1, Headlight
Headlight Aiming
15.1