6
Inspection and adjustment
BALANCING OF VEHICLE COMBINATIONS
2-9
2.6 MEASURING WITH A DECELEROMETER
If a dynamometer is not available and the tractor
is equipped with an independent (semi-)trailer
brake, a decelerometer can be used to check
the combination’s brake balance.
If an independent (semi-)trailer brake valve is
not present either, one can be temporarily
installed.
Note the following points when carrying out a
brake test:
-
Testing the brakes, may not cause
unexpected movements of the vehicle on
the road.
-
When driving straight ahead, check the
vehicle for directional stability.
-
Check the operation of warning lamps and
instruments on the instrument panel.
-
To obtain a proper braking deceleration, a
dry road surface is recommended.
-
The wheels should not lock during the
brake test.
1.
Determine the weight of the coupled laden
tractor (m
1
) and the weight on the (semi-)
trailer’s axles (m
2
).
2.
Install the decelerometer in the cab
according to the supplier’s instructions.
3.
Using a hose, connect a pressure gauge to
the service line (tractor/trailer or
truck/semi-trailer). For this purpose, install a
test connection directly before, in, or
directly behind the line with the yellow
coupling head. Put the pressure gauge in
the cab and secure the hose at several
points to avoid any problems.
5
ǹ 0006