Komatsu D31EX-21, Operation & Maintenance Manual, Page: 13 / 256

CONTENTS
1-11
OPERATION
GENERAL VIEW .................................................................................................................................................. 3-2
GENERAL VIEW OF MACHINE ................................................................................................................. 3-2
GENERAL VIEW OF CONTROLS AND GAUGES..................................................................................... 3-3
EXPLANATION OF COMPONENTS .................................................................................................................... 3-5
FRONT PANEL........................................................................................................................................... 3-5
CHECK MONITOR SYSTEM ............................................................................................................ 3-6
EMERGENCY CAUTION ITEMS ...................................................................................................... 3-7
CAUTION CAUTION ITEMS ............................................................................................................. 3-9
METER GROUP .............................................................................................................................. 3-11
LAMPS............................................................................................................................................. 3-20
METHOD OF USING MAINTENANCE MODE................................................................................ 3-21
SWITCHES ............................................................................................................................................... 3-30
CONTROL LEVERS AND PEDALS ......................................................................................................... 3-35
FUSE ........................................................................................................................................................ 3-41
ELECTRIC POWER TAKE-OUT ADAPTER ............................................................................................ 3-42
DOOR - OPEN LOCK ............................................................................................................................... 3-43
SASH GLASS INTERMEDIATE LOCK..................................................................................................... 3-43
CAP, COVER WITH LOCK....................................................................................................................... 3-44
METHOD OF OPENING AND CLOSING CAP WITH LOCK .......................................................... 3-44
METHOD OF OPENING AND CLOSING COVER WITH LOCK ..................................................... 3-45
DOOR POCKET ....................................................................................................................................... 3-45
ASHTRAY ................................................................................................................................................. 3-46
LUNCHBOX HOLDER BELT .................................................................................................................... 3-46
CUP HOLDER .......................................................................................................................................... 3-46
TOOL BOX................................................................................................................................................ 3-47
GREASE PUMP HOLDER........................................................................................................................ 3-47
CAR STEREO, HANDLING ...................................................................................................................... 3-48
EXPLANATION OF COMPONENTS............................................................................................... 3-48
METOD OF OPERATION................................................................................................................ 3-53
PRECAUTION WHEN USING......................................................................................................... 3-55
AIR CONDITIONER, HANDLING ............................................................................................................. 3-56
EXPLANATION OF PARTS............................................................................................................. 3-56
PREVENTION METHOD OF ENTRY OF DUST............................................................................. 3-58
PRECAUTION WHEN USING AIR CONDITIONER........................................................................ 3-58
INSPECTION DURING OFF-SEASON ........................................................................................... 3-58
PROCEDURE FOR REPLACING RECEIVER ................................................................................ 3-59
CLEANING AIR FILTER .................................................................................................................. 3-59
ACCUMULATOR, HANDLING.................................................................................................................. 3-60
METHOD OF RELEASING PRESSURE IN OPERATING CIRCUIT ON MACHINE EQUIPPED WITH
ACCUMULATOR ............................................................................................................................. 3-60
OPERATION ....................................................................................................................................................... 3-61
CHECK BEFORE STARTING ENGINE, ADJUST.................................................................................... 3-61
WALK-AROUND CHECK ................................................................................................................ 3-61
CHECK BEFORE STARTING ......................................................................................................... 3-63