24. SERVICE PROCEDURE 24.8.5 REPLACE CORROSION RESISTOR CARTRIDGE (Option) 1. Screw in valve 1 at the top of the corrosion resistor. 2. Using a filter wrench, turn cartridge 2 to the left to remove it. 3. Coat the seal surface of the new filter cartridge with engine oil, then install it. When installing, bring the packing surface into contact with the seal surface of the filter holder, then tighten a further 2/3 turn. Always use a genuine Komatsu cartridge. AM091790 4. Open valve 1 . 5. Run the engine and check that there is no leakage of water from the seal surface. 3-67