6.1. Start engine, so that battery is not drained.
6.2. Align the HBS with the centre of the headlamp to be tested, as in Section 5.
6.4. With an assistant sitting in the driving seat, switch on the headlamp to the beam, dip or main, which is to be checked.
Note: When checking headlamp aim on vehicles with hydropneumatic suspension systems, it is necessary to have the engine idling.
6.5. Determine the appropriate dip beam image and the aim (see figs. 5 & 6). Headlamps of older vehicles (approx. pre 1950) may
have beam images which do not conform. In such cases check:
a) DIP BEAM headlamps are aimed so they do not dazzle, ie the brightest part of the beam image is aimed at least 0.5% below the
horizontal (fig. 5), or, for headlamps which cannot be checked on dip beam, check:
b) MAIN BEAM headlamps are aimed so that the beam image centre is on or slightly below the horizontal (fig. 7).
6.6. Graduated Screen
5.1. Positioning
Locate the HBS approximately 200 to 500mm from the vehicle headlamp.
5.1.1. Standing behind the HBS, use the visor to align with a horizontal, or two symmetrical points on the vehicle i.e. the bonnet lip or the
bottom of the windscreen.
5.1.2. Ensure the visor line is parallel with the horizontal, or symmetrical selection, by rotating the HBS. This will ensure that the HBS is square
with the front of the vehicle.
5.1.3. Measure the height of the centre of the headlamp from the floor - say 650mm as an example.
5.1.4. Squeeze the locking lever (fig. 3. C) on the vertical sliding system and move the system up or down the column until the top edge of the
slider (fig. 3.D) aligns with 65cm (650mm) on the column scale. Release locking lever. Centre of lens will now be at the same height
(650mm) as the centre of the headlamp.
5.1.5. Use the sighting line on the top of the optical system housing to horizontally align the HBS with the centre of the headlamp.
fig. 3
5. OPTICAL POSITIONING
6. METHOD OF INSPECTION
CORRECT
LIGHT
PROJECTION ON
THE LINE 0.5% (BEAM LIGHT)
fig. 4
IMPOR
TANT
This HBS uses a fixed graduated screen in
accordance with the requirements of the MOT
regulations. However it must be noted that the
HBS2001 is not approved by the Vehicle
Inspectorate for conducting tests in accordance
with MOT requirements.
6.7. Dipped Beam
6.7.1. Prepare the HBS and the car as previously instructed, then turn on the dipped beam.
6.7.2.
Check that the headlamp beam tolerances are in accordance with the MOT
i
nspection manual and are within the operating tolerances
specified by the manufacturer.
6.7.3. Adjust the headlight(s) until you obtain the required result.
6.7.4. When testing the more commonly used asymmetrical headlight (see fig. 5), remember that the projection will light up a section on
the LEFT hand side of the plate at an angle of about 15
0
above the horizontal plane. Just under the centre, on the left, a small zone will
appear brighter than the rest of the projection.
HBS2001 - 2 - 061
103
(2 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals