Komatsu PC18MR-3, Operation & Maintenance Manual

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USING THE MACHINE IN THE COLD SEASON
178 WEAM012101
3.5.2 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 windshield, thus en-
suring visibility during both work and travel. Ventilation and air ex-
change are obtained with a three-speed fan controlled by the
switch (2).
The air intake is protected by a filter placed on the right side of the
cab, and air is distributed by a series of swinging vents with ad-
justable output (1) whether for the internal air flow or for demisting
and defogging the glasses.
Together with the fan, there is a radiator that transfers heat to the
air sent into the cab; it is used during the cold season and re-
ceives the hot water necessary for exchange heat directly from
the engine cooling system.
The water flow is limited or interrupted by a cock controlled by the
knob (3). Turning the handwheel clockwise to increase the hot
water flow intensity.
CAB VENTILATION
Ventilation is turned on by turning the switch (2) located on the
right side instrument panel. Turn the switch clockwise to increase
ventilation.
CAB HEATING
To use the heating system, open the valve (4) on the water mani-
fold by turning anticlockwise.
Remove the right hand lateral cover to access the valve.
NOTE
q
When the heating system is going to remain unused for a long
period, close the valve (4) turning it clockwise.
RKA23290
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RKA23280
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RKAB9510