Komatsu Utility F50003, Operation & Maintenance Manual

Page: 193 / 284

MAINTENANCE PROCEDURES
191
4.8.1.c CHECKING AND CLEANING THE AIR
RECIRCULATION FILTER (only for
machines with air conditioner)
WARNING
q
Wear safety goggles during the cleaning operations.
If the machine is provided with air conditioning system, in addition
to the external filter there is also an internal filter (3) for internal air
recirculation. This is a filter that holds the impurities present in the
air and it must be cleaned whenever a decrease in air circulation
is observed. The filter can be reached from the inside of the cab
and to clean the filtering element it is necessary to proceed as fol-
lows:
1 - Open the door (1) of the storage compartment, remove the
container (2) and extract the filtering element (3).
2 - Hit the element slightly on the palm of your hand to eliminate
the dust and blow compressed air on its surfaces, keeping
the jet at a distance of about 15 cm and making sure that the
pressure does not exceed 4÷5 bars.
3 - Carefully clean the filter housing, taking care to prevent any
foreign matter from getting into the suction duct.
4 - Put back the filtering element (3), the container of the storage
compartment (2) and close the door (1).
IMPORTANT
q
If the filtering element is excessively clogged or damaged,
change it with a new one.
4.8.1.d CHECKING THE DETERGENT LEVEL IN
THE WINDSHIELD WASHER RESERVOIR
The reservoir (1) is positioned inside the engine compartment and
contains detergent for the front and rear windshields; make sure
that the reservoir is always filled with detergent. If necessary, add
non-flammable detergent of the type used for cars.
While topping up, be careful to prevent dust from getting into the
reservoir.
IMPORTANT
q
To fill the reservoir, use only non-flammable detergent of
the type used for cars.
q
Do not use the antifreezes used in engine cooling systems.
Quantity of detergent to be mixed with water
Proportions vary according to the ambient temperature. Before topping up, it is advisable to dilute the detergent
with water according to the quantities indicated in the following table.
1
RKAB4840
2
RKAB4890
3
RKAB3740
1
Area, season Proportions Freezing temperature
Normal Detergent 1/3 Water 2/3 -4 °C
Cold area - winter Detergent 1/2 Water 1/2 -6 °C
Very cold area - winter Undiluted detergent -16 °C