EXPLANATION OF COMPONENTS OPERATION ENGINE OIL REPLACEMENT MONITOR (only for set machines) This monitor (2) warns the operator if the set time passes after the engine oil was changed. If the set time (125, 250, 500H) passes after the engine oil is replaced, this lamp lights up. If the lamp lights up, replace the engine oil. If you want to change the set time for replacement of oil, please consult your Komatsu distributor. 3-6