Mercedes-Benz Actros, Руководство по эксплуатации

Страница: 377 / 418

#
You should never reduce the pressure of
warm tyres.
#
Observe the specified tyre pressure.
The tyre pressures are specified according to
E.T.R.T.O. standards and may deviate from the
manufacturer's specifications. Before starting
your journey, determine the specified tyre pres‐
sure and check the tyre pressures while the tyres
are cold (
/
page 375).
Determining tyre pressures
Observe the notes in the "Tyre pressure" section
of the "Regular checking of the wheels and tyres"
chapter (
/
page 373).
Set the correct tyre pressure for each axle on the
vehicle.
Example: tyre size and load-bearing index
#
Read off tyre size 1 and load-bearing index
2 on the tyre.
If load-bearing index 2 is comprised of two
numbers, the first number before the "/" is for
single tyres and the second number, after the
"/", is for twin tyres.
Example: permissible axle load
#
Determine permissible axle load 3 by check‐
ing the vehicle identification plate
(
/
page 384).
#
Select the tyre pressure table which corre‐
sponds to the tyre type.
R
Single tyres
R
Twin tyres (
/
page 375)
#
Search tyre size
1
in the tyre pressure table.
#
Search load-bearing index 2 which corre‐
sponds to the tyre type next to the tyre size in
the tyre pressure table.
#
Find maximum permissible axle load 3 in
the tyre pressure table and read off the tyre
pressure.
For every 10 °C change in air temperature, the
tyre pressure changes by approximately
30 to 40 kPa (0.3 to 0.4 bar/4.4 to 5.8 psi). Bear
this temperature-related change in tyre pressure
in mind when checking tyre pressures indoors,
where the temperature may be higher than the
outside temperature.
Example:
R
the outside temperature is approximately
0 °C.
R
the room temperature is approximately
20 °C.
R
set the tyre pressure to approximately
60 to 80 kPa (0.6 to 0.8 bar/8.7 to 11.6 psi)
higher than that prescribed in the tyre pres‐
sure table.
%
For specific tasks, e.g. for winter services, a
maximum permissible vehicle axle load for
fitting approved attachments may be
increased. In such cases, the speed of the
vehicle is limited. The tyre pressure will then
deviate from the information in the following
tyre pressure table. It needs to be increased
in accordance with the E.T.R.T.O. standard
and the information provided by the tyre
manufacturer.
Tyre pressure table for single tyres
Tyres 215/75 R 17.5
Load-bearing index 135
R
Axle load 4300 kg: 850 kPa (8.5 bar/123 psi)
Tyres 12 R 20
Load-bearing index 154
R
Axle load 6300 kg: 725 kPa (7.25 bar/
105 psi)
R
Axle load 6700 kg: 775 kPa (7.75 bar/112 psi)
Wheels and tyres 375