Komatsu HD785-5, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
EVERY 1000 HOURS SERVICE
Carry out the EVERY 100 HOURS MAINTENANCE, EVERY 250 HOURS MAINTENANCE, and EVERY 500
HOURS MAINTENANCE at the same time.
REPLACE CORROSION RESISTOR CARTRIDGE
WARNING
All the engine parts are at high temperature after the engine has been operated, so never replace the cartridge immediately after
finishing operations.
Wait for the oil to cool down before replacing the cartridge.
Prepare a filter wrench
1. Screw in valve (1) at the top of the corrosion resistor.
2. Set the container to catch the water under the cartridge.
3. Using a filter wrench, remove cartridge (2).
4. Clean the filter holder, coat the steel surface of the new filter
cartridge with clean engine oil, then install it.
5. When installing, tighten until the gasket contacts the seal
surface of the filter holder, then tighten a further 2/3 turns.
If the filter cartridge is tightened too far, the gasket will be
damaged and this will lead to leakage of water. If the filter is too
loose, water will also leak from the gap at the gasket, so always
tighten the correct amount.
6. Open valve (1).
7. After replacing the cartridge, start the engine and check that there is no leakage of water from the filter seal
surface. If there is any leakage of water, check the tightening of the filter cartridge.
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