Komatsu — TABLE OF CONTENTS

TABLE OF CONTENTS 3.14.5.3 BRAKING SYSTEM ................................................................................................ 164 3.14.5.4 CONVERTER.......................................................................................................... 164 3.14.5.5 ENGINE................................................................................................................... 165 MAINTENANCE 4.1 GUIDE TO MAINTENANCE ..................................................................................................................

168 4.2 MAINTENANCE NOTES ....................................................................................................................... 170 4.2.1 NOTES REGARDING THE ENGINE........................................................................................ 170 4.2.1.1 ENGINE OIL............................................................................................................ 170 4.2.1.2 COOLANT............................................................................................................... 170 4.2.1.3 FUEL .......................................................................................................................

171 4.2.2 NOTES REGARDING THE HYDRAULIC SYSTEM................................................................. 171 4.2.3 NOTES REGARDING THE ELECTRIC SYSTEM.................................................................... 172 4.2.4 NOTES REGARDING LUBRICATION ..................................................................................... 172 4.2.5 PARTS SUBJECT TO WEAR THAT PERIODICALLY NEED CHANGING.............................. 173 4.3 FUEL, COOLANT AND LUBRICANTS.................................................................................................

174 4.3 LUBRICATION WITH GREASE ............................................................................................... 174 4.3.1 HOMOLOGATED SYNTHETIC BIODEGRADABLE LUBRICANTS “HEES” ........................... 176 4.4 DRIVING TORQUES FOR SCREWS AND NUTS ................................................................................ 177 4.4.1 STANDARD DRIVING TORQUES ........................................................................................... 177 4.4.2 SPECIFIC DRIVING TORQUES ..............................................................................................

177 4.5 LUBRICATION ...................................................................................................................................... 178 4.5.1 LUBRICATION DIAGRAM (2-SECTION BOOM) ..................................................................... 178 4.5.2 LUBRICATION DIAGRAM (3-SECTION BOOM) ..................................................................... 179 4.6 PERIODICAL CHANGE OF THE SAFETY-RELATED COMPONENTS.............................................. 180 4.6.1 CRITICAL PARTS FOR SAFETY.............................................................................................

181 4.6.1.1 FUEL SUPPLY SYSTEM ........................................................................................ 181 4.6.1.2 DELIVERY HYDRAULIC SYSTEM ......................................................................... 182 4.6.1.3 CONTROL VALVE HYDRAULIC SYSTEM............................................................. 183 4.6.1.4 BOOM HYDRAULIC SYSTEM................................................................................ 184 4.7 MAINTENANCE PLAN..........................................................................................................................

185 4.7.1 WHEN REQUIRED................................................................................................................... 189 4.7.1.a CHECKING THE BATTERY ELECTROLYTE LEVEL – INSPECTING TERMINALS AND CABLES ............................................................. 189 4.7.1.b CHECKING, CLEANING OR CHANGING THE ENGINE AIR CLEANERS............ 190 4.7.1.c CHECKING AND CLEANING THE CAB AIR FILTER ............................................ 192 4.7.1.d FUSES AND RELAYS – CHECK AND CHANGE ................................................... 193 4.7.1.e CHECKING THE WINDSHIELD WASHER FLUID LEVEL .....................................

193 4.7.1.f CHECKING THE WINDSHIELD WIPER BLADES.................................................. 194 4.7.1.g LUBRICATING THE CAB DOOR AND ENGINE HOOD HINGES.......................... 194 4.7.1.h LUBRICATING THE FORK SUPPORT ROD.......................................................... 194 4.7.1.i CHECKING THE FUEL LEVEL............................................................................... 194 4.7.1.j TOPPING UP THE BRAKING SYSTEM OIL RESERVOIR .................................... 195 4.7.2 MAINTENANCE EVERY 10 HOURS OF OPERATION OR EVERY DAY ...............................

196 4.7.2.a VARIOUS CHECKS ................................................................................................ 196 4.7.2.b CHECKING THE ACOUSTIC ALARMS, WARNING LIGHTS AND INSTRUMENTS 196 4.7.2.c CHECKING THE ENGINE COOLANT LEVEL........................................................ 197 4.7.2.d CHECKING THE RADIATOR FLUID LEVEL .......................................................... 197 4.7.2.e CHECKING THE ENGINE OIL LEVEL ................................................................... 198 4.7.2.f CHECKING THE TYRE PRESSURE...................................................................... 198 16