12. OPERATION CHECK AIR CLEANER FOR CLOGGING 1. Confirm that the air cleaner clogging monitor does not flash 2. If it flashes, immediately clean or replace the element. For details of the method of cleaning the element, see 24.2.1 “CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT”. CHECK ELECTRIC WIRING Check for damage of the fuse and any sign of disconnection or short circuit in the electric wiring. Check also for loose terminals and tighten any loose parts. Check the following points carefully. Battery Starting motor Alternator Please contact your Komatsu distributor for investigation and correction of the cause.
CHECK FOR WATER IN FUEL FILTERS, DRAIN WATER The fuel filters are fitted on the engine 1. With the engine off open the engine cover and locate the water drain at the bottom of the fuel filters. 2. To open drain valve, turn the valve counterclockwise approximately 1,5 to 2 turns until draining occurs. Drain the filter sump of water until clear fuel is visible. 3. Turn the valve clockwise to close. NOTICE: Do not over tighten the valve. Over tightening can damage the threads. PC450-ENG 2-43 WARNING If the fuse blows frequently, or there are traces of short- circuiting in the electric wiring, always locate and repair the cause. WARNING