KOMATSU SK818-5 SK820-5 TURBO SKID STEER LOADER SERVICE REPAIR MANUAL
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DESCRIPTION:
KOMATSU SK818-5 SK820-5 TURBO SKID STEER LOADER SERVICE REPAIR MANUAL
- This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
- This shop manual mainly contains the necessary technical information for operations performed in a service workshop. The manual is divided into chapters on each main group of components; these chapters are further divided into the following sections.
- STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. - TESTING AND ADJUSTING
This sections explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. Troubleshooting charts correlating «Problems» to «Causes» are also included in this section. - DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations. - MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
TABLE OF CONTENTS:
KOMATSU SK818-5 SK820-5 TURBO SKID STEER LOADER SERVICE REPAIR MANUAL
MAIN MENU................................................................... 0 COVER....................................................................... 1 CONTENTS.................................................................... 2 SAFETY...................................................................... 5 FOREWORD.................................................................... 7 HOW TO READ THE SHOP MANUAL............................................. 8 HOISTING INSTRUCTIONS................................................... 9 STANDARD TIGHTENING TORQUE.............................................. 10 COATING MATERIALS....................................................... 12 ELECTRIC................................................................ 13 WEIGHT TABLE............................................................ 14 TABLE OF OIL AND COOLANT QUANTITIES..................................... 15 CONVERSION TABLE........................................................ 17 10 STRUCTURE AND FUNCTION................................................... 25 P.T.O................................................................... 26 POWER TRAIN............................................................. 27 TRANSMISSION............................................................ 28 FINAL DRIVE............................................................. 30 HYDRAULIC CIRCUIT SK818-5............................................... 37 HYDRAULIC CIRCUIT SK820-5 TURBO......................................... 37 HST PUMP LPV40 + 40 (STANDARD).......................................... 39 HST PUMP LPV40 + 40 (HIGHFLOW).......................................... 40 SUCTION SAFETY VALVE.................................................... 45 CHARGE SAFETY VALVE..................................................... 49 CHARGE PUMP............................................................. 51 ANTI ENGINE-STALL CONTROL VALVE (AS VALVE).............................. 53 SHUTTLE VALVE........................................................... 55 CONTROL VALVE (3-SPOOL)................................................. 56 CONTROL VALVE (4-SPOOL)................................................. 59 CLSS.................................................................... 63 SOLENOID VALVE.......................................................... 71 SOLENOID VALVE ST2...................................................... 72 ACCUMULATOR............................................................. 73 PATTERN CHANGE VALVE.................................................... 74 R.H. PPC VALVE (STANDARD)............................................... 78 R.H. PPC VALVE (PATTERN CHANGE)......................................... 82 L.H. PPC VALVE (STANDARD)............................................... 86 L.H. PPC VALVE (PATTERN CHANGE)......................................... 90 CYLINDERS............................................................... 94 ELECTRICAL DIAGRAM (ENGINE LINE) ....................................... 95 ELECTRICAL DIAGRAM (FRAME LINE STANDARD)................................ 99 ELECTRICAL DIAGRAM (FRAME LINE OPTIONAL)................................103 ELECTRICAL DIAGRAM (CABIN LINE STANDARD)................................107 ELECTRICAL DIAGRAM (CABIN LINE OPTIONAL)................................113 ELECTRICAL DIAGRAM (TOP-CABIN LIGHT STANDARD)...........................121 20 TESTING AND ADJUSTMENTS..................................................123 NORMAL OR STANDARD TECHNICAL DATA.......................................124 SPECIAL TOOLS...........................................................136 CHECKING THE ENGINE SPEED...............................................137 ADJUSTMENT OF VALVE CLEARANCE...........................................138 MEASUREMENT OF THE COMPRESSION PRESSURE.................................139 CONTROL AND ADJUSTMENT OF THE FAN BELT TENSION..........................140 CONTROL AND ADJUSTMENT OF THE INJECTION TIMING..........................141 CHECKING ENGINE OIL PRESSURE............................................143 ADJUSTING THE STROKE OF THE ACCELERATOR CABLES..........................144 REGULATION OF PPC VALVES' DRIVE PRESSURE................................145 ADJUSTMENT OF THE PPC VALVE CLEARANCES..................................147 ADJUSTING THE POSITION OF THE SERVO-CONTROL ENGAGEMENT SAFETY SENSOR....148 TESTING AND ADJUSTMENT OF GEARING CHAIN TENSION.........................149 CONTROL AND REGULATION OF THE PRESSURES IN THE HYDRAULIC CIRCUITS.......150 TESTING THE HYDRAULIC PUMP..............................................151 VALVE CALIBRATION.......................................................152 CHECKING THE TRAVEL DEVIATION...........................................154 CONTROL VALVE...........................................................156 CONTROL AND REGULATION OF THE SERVO-CONTROL POWER SUPPLY................157 ELIMINATION OF RESIDUAL PRESSURES - PRESSURIZATION OF THE TANK..........159 BLEEDING AIR FROM THE HYDRAULIC CIRCUITS................................160 30 REMOVAL AND INSTALLATION.................................................163 HOW TO READ THE MANUAL..................................................165 PRECAUTIONS TO BE TAKEN WHILE WORKING...................................166 ENGINE HOOD.............................................................167 REMOVAL AND INSTALLATION............................................167 CAB.....................................................................168 TILTING.............................................................168 LOWERING............................................................170 BATTERY.................................................................171 REMOVAL AND INSTALLATION............................................171 STARTING MOTOR..........................................................172 REMOVAL AND INSTALLATION............................................172 ALTERNATOR..............................................................173 REMOVAL AND INSTALLATION............................................173 MUFFLER (SK818-5).......................................................174 REMOVAL AND INSTALLATION............................................174 MUFFLER (SK820-5 TURBO).................................................175 REMOVAL AND INSTALLLATION...........................................175 TURBOCHARGER (SK820-5 TURBO)............................................176 REMOVAL.............................................................176 INSTALLATION........................................................177 AIR INTAKE FILTER.......................................................178 REMOVAL AND INSTALLATION............................................178 NOZZLE HOLDER...........................................................179 REMOVAL AND INSTALLATION............................................179 INJECTION PUMP..........................................................180 REMOVAL.............................................................180 INSTALLATION........................................................182 CYLINDER HEAD (SK818-5).................................................183 REMOVAL.............................................................183 INSTALLATION........................................................184 CYLINDER HEAD (SK820-5 TURBO)...........................................185 REMOVAL.............................................................185 INSTALLATION........................................................186 COOLANT LIQUID PUMP.....................................................187 REMOVAL AND INSTALLATION............................................187 RADIATOR GROUP..........................................................188 REMOVAL.............................................................188 INSTALLATION........................................................189 FUEL TANK (SK818-5).....................................................190 REMOVAL AND INSTALLATION............................................190 FUEL TANK (SK820-5 TURBO)...............................................191 REMOVAL.............................................................191 INSTALLATION........................................................192 CAB.....................................................................193 REMOVAL.............................................................193 INSTALLATION........................................................195 ENGINE-PUMP GROUP.......................................................196 REMOVAL.............................................................196 INSTALLATION........................................................199 COMPLETE HYDRAULIC PUMP.................................................200 REMOVAL.............................................................200 INSTALLATION........................................................202 GEAR PUMP...............................................................203 REMOVAL AND INSTALLATION............................................203 ENGINE-PUMP COUPLING....................................................204 REMOVAL AND INSTALLATION............................................204 CONTROL VALVE...........................................................205 REMOVAL AND INSTALLATION............................................205 PPC VALVES..............................................................206 REMOVAL AND INSTALLATION............................................206 HEATING FAN.............................................................207 REMOVAL.............................................................207 INSTALLATION........................................................208 HUB WHEEL...............................................................209 REMOVAL.............................................................209 INSTALLATION........................................................210 DISMANTLING.........................................................211 ASSEMBLY............................................................212 FINAL DRIVE.............................................................213 REMOVAL.............................................................213 INSTALLATION........................................................214 RAISING CYLINDER........................................................215 REMOVAL.............................................................215 INSTALLATION........................................................216 BUCKET CYLINDER.........................................................217 REMOVAL.............................................................217 INSTALLATION........................................................218 WORK EQUIPMENT CYLINDERS................................................219 DISASSEMBLY.........................................................219 ASSEMBLY............................................................221 COMPLETE WORKING EQUIPMENT..............................................225 REMOVAL.............................................................225 INSTALLATION........................................................227 FULCRUM LEVER...........................................................228 REMOVAL AND INSTALLATION............................................228 LIFT LEVER..............................................................229 REMOVAL.............................................................229 INSTALLATION........................................................230 WORKING EQUIPMENT SUPPORT FRAME.........................................231 REMOVAL.............................................................231 INSTALLATION........................................................231 40 STANDARD MAINTENANCE.....................................................233 P.T.O...................................................................234 TRANSMISSION............................................................235 FINAL DRIVE.............................................................236 HYDRAULIC PUMP..........................................................237 AS VALVE................................................................238 CONTROL VALVE (SUPER HIGH-FLOW VERSION).................................239 CONTROL VALVE (STANDARD)................................................240 R.H. PPC VALVE..........................................................245 L.H. PPC VALVE..........................................................246 L.H. PPC VALVE PATTERN CHANGE...........................................247 PATTERN CHANGE VALVE....................................................248 CYLINDERS...............................................................249 WORKING EQUIPMENT.......................................................250
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