The revised SAE J599 standard (8/97) requires low beam headlight aim to be adjusted based on headlamp height from the ground. The
NOMINAL VERTICAL AIM position on low beam headlamps, as introduced in the new revision of the Standard SAE J599, "shall be
adjusted based on the headlamp mounting height, from the ground to the light source center of the headlamp".
The TABLE 1 shows the VERTICAL BEAM AIM GUIDELINES as required in the standard. These apply only for low beam.
The TABLE states that headlights centered 36”- 48” from the ground must be aimed 2” below the 0 line and headlights mounted 48”- 54”
must be aimed 4” below the 0 line. Inspection tolerance is plus or minus 4”.
7.6 m (25 ft)
H
Nominal
Vertical Aim
Headlamp centerline
mounting height
H
TABLE 1 - VERTICAL AIM GUIDELINES
Headlamp
(centerline)
Aim Inspection Limits
mounting
for Vertical Aim
height
22
36 in
4 in
4 in
to
0
UP to
DOWN
56
90 cm
100 mm
100mm
36
48 in
2 in
2 in
6 in
to
DOWN
UP to
DOWN
90
120 cm
50 mm
50 mm
150 mm
48
54 in
4 in
0 in
8 in
to
DOWN
UP to
DOWN
120 140 cm
100 mm
0 mm
200mm
Beam slope
compensation
(nominal
vertical aim)
Beam Slope Compensation
NOMINAL VERTICAL AIM FOR LOW BEAMS
Page 12 - Beam Slope Compensation
Canbuilt Mfg.
Perfect Night Vision.....
Summary of Contents for OPT-5405
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Page 20: ...NOTES...
