Operation; Preparation; Working Surface; Levelling - Bosch HTD 6 Serie Originalbetriebsanleitung

5.

Operation

5.1

Preparation

5.1.1

Working surface

A flat surface is required to ensure accurate headlamp
adjustment. If this is not available, the headlight tester
and the vehicle must at least be positioned on a surface
with a similar difference in height. The inclination must
not be more than 0.5 %.
Fig. 13: Slope of working surface
5.1.2

Levelling

The horizontal position of the headlight tester is
checked using the spirit level in the light box.
1. Position the headlight tester in the working area.
2. Use the spirit level inside the light box to check the
horizontal position.
Fig. 14: Spirit level
3. If not correctly levelled, perform adjustment at the
trolley. Three of the wheels are height-adjustable.
$
Slacken off the wheel bolt slightly.
$
Alter the angle by turning the adjusting screw
above this.
$
Re-tighten the wheel bolt.
$
Adjust the heights of the other wheels if
necessary.
Robert Bosch GmbH
Operation | HTD 6xx | 25
Fig. 15: Level adjustment at the wheels
1 Bolt
2 Turn the adjusting screw
3 Bolt
5.2

Vehicle preparation

DANGER – Risk of asphyxiation from exhaust
fumes
Extraction of the harmful exhaust fumes
produced by combustion must be ensured
when working in enclosed areas with the
engine running.
¶
Ensure good ventilation.
¶
Always switch on the exhaust gas
extraction system before performing
headlamp testing.
!
On vehicles with air suspension, start the engine
five minutes before the test and perform checking/
adjustment with the engine running.
1. Make sure the headlamps are clean and dry.
2. Vehicles with headlight range control only:
Set the control to "0".
3. Remove anything which could affect correct
positioning of the vehicle, e.g. mud, snow or ice.
4. Set the vehicle wheels to straight ahead position.
5. Make sure the vehicle frame is not bent.
6. Check that the tyres are inflated to the correct
pressure.
7. Start the engine.
"
The headlight tester can be placed in position.
en
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1 692 104 610 2015-01-14