24. SERVICE PROCEDURE 24.5 EVERY 500 HOURS SERVICE Maintenance for every 50, 100 and 250 hours should be carried out at the same time. 24.5.1 REPLACE FUEL FILTER CARTRIDGES AA WARNING Engine is at high temperature immediately after the machine has been operated. Wait for engine to cool down before replacing the filter. Keep naked flames - sparks away from fuel. When cranking the engine, ensure all safety procedures have been followed, as the engine may start. Get a filter wrench and a container to catch the fuel. 1. Set the container to catch the fuel under the filter cartridges. 2. Using a filter wrench, turn filter cartridges wise to remove them.
@ and @) counterclock- Clean the filter holders, fill new filter cartridges with clean fuel, coat the packing surface with engine oil, then install them to the filter holders. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then tighten it up 1/2 to 3/4 of a turn. If the filter cartridge is tightened too far, the packing will be damaged and this will lead to leakage of fuel. If the filter cartridge is too loose, fuel will also leak from the packing, so always tighten to the correct amount. After replacing the fuel filter cartridges, bleed the air from the system. Bleed the air as follows.
Fill the tank with fuel (to the position where the fuel gauge shows FULL). After replacing filter cartridges @, loosenair bleed plugs . Operate the lift pump plunger up and down, and continue until no more bubblescome out with the fuel from air bleed plugs . Tighten air bleed plugs. Use genuine Komatsu filter cartridges. After PC160/180/200-6k-ENG replacing the filter cartridges, start the engine and check that there is no leakage of fuel from the filter seal surface. 3-61