1187
89.2
Model
No Page
AIR CONDITIONING, FIT TING INSTRUCTION
(PT94--- cabin) 30.07.1999
17(28)
28.06.1999
6000---8750
6250Hi---8950Hi
SERVICING AND USE:
* If it is required to reduce quickly temperature to
the desired value the engine speed must be set
to at least a 1000 RPM with cooling knob in max.
position (if air humidity is high the control knob is
turned less) and fan in position II. The cooling
knob is then turned to the desired value and the
fan speed adjusted. Note that a high fan speed
does not always produce the coldest result as air
passes through the evaporator so quick ly that it
is not sufficiently cooled down.
* Apart from cab cooling, the installation can also
be used from reducing the general air humidity
in the cab (e.g. from windows) by setting on the
heating valve for a short time. The moisture in
the air is then condensed in the evaporator and
the air heated to the desired temperature
* On the drier there is an inspection glass. When
the air conditioner has been in function for about
10 min, should refrigerant in the glass be almost
transparent. Some bubbles cab be seen when
engine revs are changed up and down. On this
drier there is also a separate moisture indicator.
Blue colour indicates that the drier is active. Pink
or grey colour means that the drier is inactive
and should be changed.
* The most usual cause of faults in a cooling
installation is moisture in the system or that gas
has leaked out. I f there is moisture in the refriger-
ant, ice plugs will be formed which block the
expansion valve (these both faults can be seen
in the drier inspection glasses).
* To prevent gas leakage through drying out of the
seals on the compressor shaft the air conditioner
should be run for about five minutes at every
lubrication service of the tractor, or at least once
a month, even during winter.
NOTE! Check that the compressor actually starts
(at low temperatures the thermostat cuts out).
*The condenser must be cleaned at regular inter-
vals to remove dust, insects and other foreign
matter. Twisted gills must be straightened out.
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