. OPERATION EXPLANATION OF COMPONENTS time, so carry out inspection, filling, or replacement. 3 - 14 MAINTENANCE CAUTION This monitor (6) lights u p if any of the the following are applicable. Whe n it lights up, acti on code "E01" a nd the location needing maintenance are displa yed on the character the same Drop in engine oil le Clogged engine oil fi lter (if equipped) Drop in hydraulic oil level (if equipped Clogged air cleaner Clogged hydraulic fil Clogged transmissio Drop in engine cooli Clogged brake cooli ng oil filter (if equipped) REMARK In addition to the above , if the filter or oil replacement t ime is displayed on the character display, the lamp will flash or light u