Komatsu — CONTENTS

FOREWORD CONTENTS CENTRAL WARNING LAMP...................................................................................................................... 3-8 CHARACTER DISPLAY PORTION............................................................................................................ 3-9 EMERGENCY STOP ITEM ...................................................................................................................... 3-15 CAUTION ITEMS......................................................................................................................................

3-18 INSPECTION AND MAINTENANCE ITEM............................................................................................... 3-21 PILOT DISPLAY PORTION...................................................................................................................... 3-25 METER DISPLAY PORTION.................................................................................................................... 3-30 OTHER FUNCTIONS OF MACHINE MONITOR......................................................................................

3-32 SWITCHES .................................................................................................................................................... 3-38 CONTROL LEVERS, PEDALS...................................................................................................................... 3-52 STEERING TILT LOCK LEVER..................................................................................................................... 3-58 CAP WITH LOCK........................................................................................................................................... 3-59 METHOD OF OPENING AND CLOSING CAP WITH LOCK (FOR THE FUEL TANK FILLER PORT) ...

3-59 METHOD OF OPENING AND CLOSING CAP WITH LOCK (FOR THE HYDRAURIC TANK FILLER PORT)....................................................................................... 3-60 SAFETY BAR................................................................................................................................................. 3-61 TOWING PIN ................................................................................................................................................. 3-61 GREASE PUMP.............................................................................................................................................

3-61 CAB DOOR OPEN LOCK.............................................................................................................................. 3-62 CAB WINDOW OPEN LOCK CANCEL KNOB .............................................................................................. 3-62 BACKUP ALARM........................................................................................................................................... 3-62 FUSE .............................................................................................................................................................

3-63 FUSE CAPACITY AND NAME OF CIRCUIT............................................................................................ 3-64 SLOW-BLOW FUSE ...................................................................................................................................... 3-65 TAKING OFF POWER................................................................................................................................... 3-65 HANDLING CAB WIPER ...............................................................................................................................

3-66 PREVENTING DAMAGE TO WIPER ARM BRACKET ............................................................................ 3-66 DUST INDICATOR ........................................................................................................................................ 3-66 OPERATION ....................................................................................................................................................... 3-67 CHECK BEFORE STARTING ENGINE, ADJUST.........................................................................................

3-67 WALK-AROUND CHECK ......................................................................................................................... 3-67 CHECK BEFORE STARTING .................................................................................................................. 3-70 ADJUSTMENT.......................................................................................................................................... 3-75 OPERATIONS AND CHECKS BEFORE STARTING ENGINE................................................................

3-78 STARTING ENGINE ...................................................................................................................................... 3-80 AUTOMATIC WARMING-UP OPERATION.............................................................................................. 3-82 OPERATIONS AND CHECKS AFTER STARTING ENGINE ........................................................................ 3-83 BREAKING IN THE MACHINE................................................................................................................. 3-83 NORMAL OPERATION ............................................................................................................................

3-83 STOPPING ENGINE...................................................................................................................................... 3-85 CHECK AFTER STOPPING ENGINE ........................................................................................................... 3-85 MOVING MACHINE OFF (DIRECTIONAL, SPEED), STOPPING ................................................................ 3-86 PREPARATIONS FOR MOVING MACHINE............................................................................................ 3-86 CHANGING GEAR SPEED ......................................................................................................................

3-89 CHANGING DIRECTION.......................................................................................................................... 3-90 STOPPING MACHINE.............................................................................................................................. 3-92 TURNING....................................................................................................................................................... 3-95 EMERGENCY STEERING .......................................................................................................................

3-95 OPERATION OF WORK EQUIPMENT ......................................................................................................... 3-97 WORK POSSIBLE USING WHEEL LOADER ............................................................................................... 3-99 DIGGING OPERATIONS.......................................................................................................................... 3-99 LEVELING OPERATIONS......................................................................................................................

3-103 PUSHING OPERATION ......................................................................................................................... 3-103 LOAD AND CARRY OPERATIONS ....................................................................................................... 3-103 LOADING OPERATIONS ....................................................................................................................... 3-104 PRECAUTIONS FOR OPERATION ............................................................................................................

3-106 PERMISSIBLE WATER DEPTH............................................................................................................. 3-106 IF WHEEL BRAKE DOES NOT WORK.................................................................................................. 3-106 PRECAUTIONS WHEN DRIVING UP OR DOWN SLOPES.................................................................. 3-106 1-11