METHOD FOR CHECKING DURING OFF SEASON
Even during the off-season, operate the air conditioner for 3 to 5 minutes once a month to maintain the oil film at
all parts of the compressor.
METHOD FOR CLEANING AIR CONDITIONER AIR FILTERS (FRESH/RECIRC)
When the air conditioner air filter is clogged and the air conditioner does not work well, clean the air filter.
1.
Loosen knob (1) at the rear left of the machine.
2.
Remove upper cover (2).
3.
Remove fresh air filter cover (3).
4.
Remove fresh air filter (4).
5.
Remove knob (5) at the rear left in the cab, and remove
bracket (6) from part (a).
6.
Remove the recirculation air filter from bracket (6).
7.
Blow dry compressed air (0.2 MPa {2.1 kg/cm
2
} or below)
from the inside of each filter along the pleats.
NOTICE
If there is a small hole or a thin portion on the filter, re-
place the filter.
If the pleats of each filter or the seal of the fresh air fil-
ter is damaged, replace it as well.
REMARK
• Since the filtering ability of the filters decreases as they are aged, replace them every 500 operating
hours or every year.
• In an environment such as sandy ground, grassy terrain, etc. where the filters are clogged easily, clean
more frequently.
• If the filters are too clogged to clean, stained with oil, or extremely dirty, replace them with new ones.
For replacement, see “METHOD FOR REPLACING AIR CONDITIONER FRESH/RECIRC FILTERS
(4-55)”.
METHOD FOR BLEEDING AIR FROM HYDRAULIC CIRCUIT
In the following cases, bleed air according to the following procedure.
• When the hydraulic piping, work equipment pump, fan pump, etc. is replaced or repaired.
• When all of the hydraulic oil is replaced.
MAINTENANCE PROCEDURE MAINTENANCE
4-40
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