SECTION 50 -- CAB AIR CONDITIONING SYSTEM -- CHAPTER 1 11
603.54.471.00 -- 11 -- 2004
4
CAB HEATING AND VENTILATION CONTROLS
VENTILATION
T urn on cab ventilation by operating switch (2) fig. 4
and direct the air flow as required by positioning the
front vents (3, fig. 5).
The operator may select outside air or inside air by
adjusting the rear air recirculation vents (1, fig. 6)
which can assume two positions.
— vents closed: air is drawn from outside the cab
through the lateral filters.
— vents open: the greater part of the air is drawn
from inside the air through the vents.
Fresh air drawn into the cab from outside is always
filtered.
With the fan in operation, and the doors, windows
and recirculation vents closed, the pressure inside
the cab is greater than the external pressure and thus
air can only enter the cab through the lateral filters af-
ter it has been suitably filtered.
Fan
The fan control switch (1, fig. 7) is powered when
the ignition switch (fig. 8) is in position B.
A. Low speed.
B. Medium speed.
C. High speed.
Air filter
TRE0024A
5
6
TRE0025A
DANGER
Remember that the filters of the cab provide no
protection against antiparasitic chemicals in general.
Therefore complete protection against these prod-
ucts can only be achieved by the adoption of addi-
tional specific safety measures for the individual
product. This applies to all types of filter, for which the
prescriptions for use and maintenance must be fol-
lowed scrupulously. Even the use of active carbon fil-
ters does not exempt the operator from adopting the
personal safety precautions recommended for the
product in question.
Note -- To increase the pressure inside the cab, se-
lect outside air only (air recirculation vents 1, fig. 6
closed).
7
TRE0024A
2
1
3
TRE0011A
1
1
2
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