Komatsu Utility F50003, Operation & Maintenance Manual

Page: 192 / 284

MAINTENANCE PROCEDURES
190
8 - Put back the cover (2), turning it clockwise by approximately
12.5°. Make sure that the cover (2) is perfectly locked and
make sure that the ejector (5) is positioned vertically on the
lower part.
9 - Once the whole has been assembled, push the safety retain-
er (1) toward the inside.
IMPORTANT
q
If the clogging warning light comes on after the starting of
the engine, it is necessary to change the primary filtering
element and the safety cartridge.
q
Change the primary filtering element after 6 cleaning oper-
ations or after one year. Every time the primary filtering ele-
ment is replaced, the safety cartridge must be replaced,
too.
To change the safety cartridge (6), after removing the primary ele-
ment (3), proceed as follows:
1 - Remove the safety cartridge (6) and replace it with a new
one.
2 - Once the safety cartridge (6) has been installed inside the fil-
ter housing (4), make sure that it fits perfectly in its seat.
3 - Reassemble the whole as described above, making sure that
all the filter components are perfectly secured.
4 - Push the safety lock (1) towards the inside.
4.8.1.b CHECKING AND CLEANING THE CAB
AIR FILTER
WARNING
q
Wear safety goggles during the cleaning operations.
The air suction for the ventilation of the cab is protected by a filter
positioned on the right side of the cab.
This filter blocks all the impurities contained in the air and must be
cleaned whenever a decrease in air circulation is observed.
The filter can be reached from the outside of the cab. To clean the
filtering element, proceed as follows:
1 - Remove the screws (1), remove the outer guard (2) and ex-
tract 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 body from getting into the suction duct, and reassem-
ble the unit.
IMPORTANT
q
If the filtering element is excessively clogged or damaged,
change it with a new one.
RKAB3720
12.5 °
2
1
5
RKAB3730
6
4
RKAB4870
1
2
3
RKAB4950