Chevrolet 30 Series 1967 Service Manual page 504

ELECTRICAL—BODY AND CHASSIS 12-4
horizontal crossarm s of each aimer.
. Rotate both aimers so that the string just clears the
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points on the crossarm s.
HORIZONTAL ADJUSTMENT
7. a. Turn horizontal aiming screw, Figure 4, on left-
hand lamp until the string is positioned over the
crossarm centerline.
in making the final adjustment to take up play in
the headlamp mechanism,
b. Repeat the above procedure on the right-hand
lamp to complete the horizontal adjustment of the
headlamps.
VERTICAL ADJUSTMENT
. a. Numeral "2" (fig. 5) should appear in the "down"
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window of each aimer. If not, loosen knob at
underside of aimer arm and slide back and forth
until the numeral does appear.
NOTE:
This setting will give a 2" drop of the
headlamp high beam spot centerline on a screen
placed 25 feet forward of the vehicle.
state laws for proper vertical setting.
b. Turn headlamp vertical aim screw (fig. 5) on left-
hand unit counter-clockwise until the bubble is at
the inner end of the glass tube.
clockwise until bubble is centered in tube.
c. Repeat this procedure on right-hand headlamp
unit to complete vertical adjustment of lamps.
9. Recheck the string at the ends of each crossarm for
correct setting and the bubble on each aimer for
centered position.
10. Remove the aim ers by pulling on the suction cup tabs
through the openings in the aimers (fig.
11. With headlamps properly aimed, replace headlamp
bezels.
HOW TO SELECT A LEVEL AIMING AREA
1. Select area you believe to be level.
2. Remove headlamp bezels and install Aimers on each
headlamp (fig. 3) making sure aiming lugs engage
Fig . 6 - Removing Aim er from Headlamp
Turn the screw clockwise
Check
Then turn screw
).
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Fig. 7 - Selecting Level Aiming Area
smooth inner ring of the Aimer.
press firmly on the knob extending out from the
center of the Aimer base.
cup into place on the Sealed Beam unit.
3. Loosen the slider knob beneath the aimer arm and
set the numeral "2" in the DOWL view window
(fig. 7). Back vertical lamp adjusted out on each
lamp until bubble is outside of black line of vial,
then center bubble in between black line of vial by
turning clockwise.
4. After both bubbles are centered, turn the car around
end for end, making sure the tires are in the spots
made on the floor before the car was moved.
5. If the bubbles are still within the two outside black
marks on the vials, the floor is level enough to use
the Aimer as it comes from the factory.
NOTE:
A quick level check can be made by
using the T-3 Safety-Aimer as a level. Use with
a true eight to ten foot two by four as an exten­
sion. Make sure pads on base of Aimer are
used. Place the board where you expect the
wheels to be and take readings as outlined above.
. If either bubble moves outside the black lines of the
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vial there is too much slant to the floor.
the car in at different angles onto the aiming area.
If bubbles can not be centered follow procedure under
"How to Compensate for Unlevel Floor."
NOTE: When level portion of floor is obtained,
mark tire spots on floor so spots can be used
next time without calibrating Aimer.
TO COMPENSATE FOR UNLEVEL FLOORS
If your floor is not level within the limits specified, the
T-3 Aimer can be calibrated to compensate for the error
in the floor. Follow this procedure with both aimers.
1. Drive the car onto the area for which you wish to
compensate the aim ers, and install the aimers in
place on the headlamps.
2. Loosen knob beneath the aimer arm and move the
slider until the bubble is centered.
3. Record the numeral in the view window. (This
numeral is to be used only for re calibration.)
To install Aimer,
This forces the suction
Try driving
CHEVROLET TRUCK SERVICE MANUAL