24. SERVICE PROCEDURE 24.6.6 CHECK FOR LOOSE ROPS MOUNT BOLTS Check for loose and damaged bolts. If any loose bolt is found, tighten to a torque of 1520 – 1912 Nm (155 – 195 kgm, 1121 – 1410 lbft). If any damaged bolt is found, replace the bolt with a genuine Komatsu bolt. 24.6.7 REPLACE CORROSION RESISTOR CARTRIDGE ¤ WARNING If the engine has been operated, all parts will be at a high temperature, so never try to replace the cartridge immediately after stopping the engine. Always wait for the engine and other parts to cool down. Prepare the following. Container to catch drained coolant Filter wrench 1. Close valves 1 (2 places). 2. Set a container to catch the coolant under the cartridge.
3. Using a filter wrench, remove cartridge 2 . 4. Clean the filter holder, coat the packing surface and thread of the new cartridge with engine oil, then install it to the filter holder. 5. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then tighten it up 2/3 of a turn. If the filter cartridge is tightened too far, the packing will be damaged and this will lead to leakage of coolant. If the filter cartridge is too loose, coolant will also leak from the packing, so always tighten to the correct amount. 6. Open valves 1 (2 places). 7.
After replacing the cartridge, start the engine and check for any leakage of water from the filter seal surface. If there is any water leakage, check if the cartridge is tightened properly. 24.6.8 CHECK ALL TIGHTENING PARTS OF TURBOCHARGER Contact your Komatsu distributor for inspection or adjustment. 3-60