Komatsu PC220LC -8 Operation & Maintenance Manual page 321

MAINTENANCE PROCEDURE
CLEAN AND INSPECT RADIATOR FINS, OIL COOLER FINS, AFTERCOOLER FINS, FUEL COOLER
FINS, AND AIR CONDITIONER CONDENSER FINS (only machines equipped with air conditioner)
If compressed air, high-pressure water, or steam hits your body directly or dirt is sent flying by the compressed air, high-pressure
water, or steam, there is danger of personal injury. Always wear protective glasses, dust mask, and other protective equipment.
NOTICE
When using compressed air for cleaning, blow it keeping some distance to avoid damaging the fins. Damage on the fins can cause
water leakage and overheating. In a dusty job site, check the fins every day, regardless of the maintenance interval.
1. Open engine hood (1).
2. Loosen screw (3) and pull up net (2).
3. After pulling up net (2), clean it.
(Install it again in Step 7.)
4. Check the front and rear surfaces of oil cooler fins (4), radiator
fins (5), aftercooler fins (6), Air conditioner condenser fins (7),
and fuel cooler fins (8). If there is any mud, dirt, or leaves stuck
to the fins, blow the dirt off with compressed air.
Steam or water may be used instead of compressed air.
However, when carrying out powerful steam cleaning
(high-pressure machine wash) of the heat exchange
equipment (radiator, oil cooler, aftercooler, fuel cooler, air
conditioner condenser), maintain sufficient distance from the
machine when carrying out the operation. If steam cleaning
(high-pressure machine wash) is carried out at close range,
there is danger that the internal fins of the heat exchange
equipment may be deformed, and this will cause early clogging
and breakage.
5. Check the rubber hose. Replace with a new one if the hose is
found to have cracks or to be hardened by aging. In addition,
check the hose clamps for looseness.
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WARNING
MAINTENANCE