Komatsu WB93R-5, Operation & Maintenance Manual

Page: 124 / 284

GUARDS, CAB AND DRIVER’S SEAT
122
3.5.3 VENTILATION AND HEATING
The ventilation and heating of the cab serve to reduce the opera-
tor’s stress both in summer and in winter; these functions also
serve to eliminate condensate from the front window, thus ensur-
ing visibility during both work and travel.
Ventilation and air change are achieved by means of a 3-speed
fan, which is assembled on the outside of the machine, under the
cab, and is operated with a selector (3).
The air suction is protected by a filter positioned on the right side
of the cab, while air distribution is obtained through a series of ad-
justable vents with variable flow rate (1) for the side flows or
through the vents (2) for the flows that serve to defrost and defog
the front window.
A radiator having the function to heat the air conveyed into the
cab is installed beside the fan; this is used in the cold season and
receives the hot water necessary for the heat exchange directly
from the engine cooling circuit.
The water supply flow is partialized or excluded by means of a
cock operated by the knob (4). The intensity of the hot water flow
can be increased by turning the knob (4) clockwise.
NOTE
q
If the operator deems it necessary, the machine can be
equipped with air conditioning system in addition to the ventila-
tion and heating system. This is particularly useful in the hot
season, when the temperatures are rather high.
For further information on the use of the air conditioning system,
see "3.5.4 AIR CONDITIONER (if installed)".
RKAB3340
1
RKAB3440
1
RKAB3430
2
RKAB3450
1
RKAB3470
3
4
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