Komatsu PC138USLC Operation & Maintenance Manual page 323

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
1. Open the cover at the rear of the cab and the battery room door
at the left side of the machine.
2. Remove 4 wing screws (1) and remove net (2).
3. Check the front and rear surfaces of oil cooler fins (3), radiator
fins (4), aftercooler fins (5), Air conditioner condenser fins (6),
and fuel cooler fins (7). 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.
4. Check the rubber hose. Replace with a new one if the hose is
found to have cracks or to be hardened by aging.
Also, check hose clamps for looseness.
5. After completing inspection and cleaning, install net (2) to its original condition.
CLEAN AIR CONDITIONER FRESH/RECIRC FILTERS
When using compressed air, there is danger of dirt flying and causing personal injury. Always wear protective glasses, dust
mask, and other protective equipment.
Always check that the slide door is locked at the open or closed position before cleaning the FRESH or RECIRC filter. If the
slide door is free, there is danger that it may suddenly move and catch your fingers or break the cover.
NOTICE
The guide for cleaning the filter is 500 hours, but if the machine is used on an extremely dusty jobsite, reduce the maintenance
interval and clean the filter more frequently.
When washing the floor, be careful not to get water on the air conditioner system.
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WARNING
MAINTENANCE MAINTENANCE