Komatsu Galeo PC800LC-8, Operation & Maintenance Manual, Page: 286 / 318

MAINTENANCE PROCEDURE
MAINTENANCE
4-66
REPLACE CORROSION RESISTOR CARTRIDGE 4
(If equipped)
WARNING
The oil is at high temperature after the engine has been operated, so never replace the cartridge immedi-
ately after finishing operations.
Wait for the oil to cool down before replacing cartridge.
q
Container to catch coolant
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Prepare a filter wrench
1. Turn valve (1) of corrosion resistor (2) to the CLOSE stop-
per position.
2. Set a container under the cartridge to catch the coolant.
3. Using a filter wrench, turn cartridge (2) to the left to remove
it.
4. Clean the filter holder, coat the seal surface of the new car-
tridge thinly with oil, then install the cartridge.
q
Always use a genuine Komatsu part for the cartridge.
5. When installing the cartridge, bring the packing surface into contact with the seal surface of the filter holder,
then tighten a further 2/3 times.
If the filter cartridge is tightened too far, the gasket will be damaged and coolant will leak. If it is too loose, cool-
ant will leak from the gap in the gasket, so always keep the proper tightening angle.
6. Turn valve (1) of corrosion resistor (2) to the OPEN stopper position.
7. After replacing the cartridge, run the engine, and check for any leakage of water from the filter seal surface. If
any water leakage is found, check the tightening of the filter cartridge.
CHECK WELDED STRUCTURE 4
(Color check)
Cracks in welded structures can be seen easily with a color check. Check the revolving frame, center frame,
boom, and arm every 1000 hours.
In particular, carry out a color check on the important check points (marked with a circle).
The procedure for the color check is as follows.
1. Prepare the materials needed for the color check. (Detergent, penetrating agent, developing solution)
2. Spray with detergent and wash to remove all the dirt and oil from the place to be checked.
3. After washing, dry the area, then spray with penetrating agent and leave for 5 - 20 minutes.
4. Spray with detergent, then clean the surface with a cloth.
5. Clean the surface again, then spray with developing solution.
6. Leave for 15 - 20 minutes, then check visually for cracks.
If there are any cracks, color can be seen.
7. If there are any cracks, carry out the repair procedure to repair.