Komatsu — TABLE OF CONTENTS

TABLE OF CONTENTS 4.3 FUEL, COOLANT AND LUBRICANTS................................................................................................. 170 4.3.1 LUBRICATION WITH GREASE ............................................................................................... 171 4.3.2 HOMOLOGATED SYNTHETIC BIODEGRADABLE LUBRICANTS “HEES” ........................... 172 4.4 DRIVING TORQUES ............................................................................................................................. 173 4.4.1 STANDARD DRIVING TORQUES FOR SCREWS AND NUTS ..............................................

173 4.4.2 SPECIFIC DRIVING TORQUES FOR SCREWS AND NUTS ................................................. 174 4.4.3 STANDARD DRIVING TORQUES FOR HOSES WITH ORFS................................................ 174 4.5 LUBRICATION ...................................................................................................................................... 175 4.5.1 LUBRICATION DIAGRAM........................................................................................................ 175 4.5.2 LUBRICATION DIAGRAM (4in1 bucket and pallet forks) ........................................................

176 4.5.3 LUBRICATION DIAGRAM (front bucket quick couplings)........................................................ 177 4.5.4 LUBRICATION DIAGRAM (offset device) ................................................................................ 178 4.6 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS.............................................. 179 4.6.1 SAFETY RELATED PARTS ..................................................................................................... 180 4.6.1.1 FUEL SYSTEM .......................................................................................................

180 4.6.1.2 DELIVERY HYDRAULIC SYSTEM......................................................................... 181 4.6.1.3 FRONT LOADER HYDRAULIC SYSTEM............................................................... 182 4.6.1.4 BACKHOE HYDRALIC SYSTEM............................................................................ 183 4.6.1.5 OPERATOR’S SAFETY.......................................................................................... 184 4.7 MAINTENANCE PLAN..........................................................................................................................

185 4.8 MAINTENANCE PROCEDURES.......................................................................................................... 187 4.8.1 WHEN REQUIRED................................................................................................................... 187 4.8.1.a CHECKING, CLEANING OR CHANGING THE ENGINE AIR FILTERS ................ 187 4.8.1.b CHECKING AND CLEANING THE CAB AIR FILTER ............................................ 188 4.8.1.c CHECKING AND CLEANING THE AIR RECIRCULATION FILTER (only for machines with air conditioner)...................................................................

189 4.8.1.d CHECKING THE DETERGENT LEVEL IN THE WINDSHIELD WASHER RESERVOIR ........................................................................................................... 189 4.8.1.e CHECKING THE WINDSHIELD WIPER BLADES.................................................. 190 4.8.1.f LUBRICATING THE CAB DOOR HINGES............................................................. 190 4.8.1.g FUSES AND RELAYS – CHECK AND CHANGE................................................... 190 4.8.1.h BLEEDING THE BRAKING CIRCUIT ..................................................................... 191 4.8.1.i CHECKING AND ADJUSTING THE WHEEL TOE-IN ...........................................

192 4.8.1.j CHECKING THE BRAKING EFFICIENCY.............................................................. 192 4.8.1.k CHECKING AND ADJUSTING THE PARKING BRAKE......................................... 193 4.8.1.l CHECKING AND ADJUSTING THE BRAKE PEDAL STROKE ............................. 194 4.8.1.m ADJUSTING THE AUTOMATIC RETURN-TO-DIG DEVICE OF THE FRONT BUCKET (if installed) .............................................................................................. 194 4.8.1.n CHECKING AND ADJUSTING THE STABILIZER SLACK..................................... 195 4.8.2 MAINTENANCE INTERVALS IN CASE OF USE OF THE DEMOLITION HAMMER ..............

196 4.8.2.a CHANGING THE HYDRAULIC OIL FILTER........................................................... 196 4.8.2.b CHANGING THE HYDRAULIC OIL ........................................................................ 196 4.8.3 CHECKS TO BE CARRIED OUT BEFORE STARTING THE ENGINE ................................... 197 4.8.3.a VARIOUS CHECKS ................................................................................................ 197 4.8.3.b CHECKING THE COOLANT LEVEL....................................................................... 197 4.8.3.c CHECKING THE FUEL LEVEL...............................................................................

198 4.8.3.d CHECKING THE ENGINE OIL LEVEL ................................................................... 198 4.8.4 MAINTENANCE EVERY 10 HOURS OF OPERATION ........................................................... 199 4.8.4.a LUBRICATING THE JOINTS .................................................................................. 199 4.8.5 MAINTENANCE AFTER THE FIRST 50 HOURS OF OPERATION (Only for machines in which synthetic biodegradable oil type HEES is used).......................... 201 15