KOMATSU 125E-6 SERIES ENGINE SERVICE REPAIR MANUAL (SEN05624-02) KOMATSU 125E-6
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KOMATSU 125E-6 SERIES ENGINE SERVICE REPAIR MANUAL (SEN05624-02) KOMATSU 125E-6
• This shop manual describes the technical information required for the services performed in a workshop. The shop manual is divided into the following chapters for the convenience of use.
00. Index and foreword
• This section includes the index, foreword, safety and basic information.
01. Specification
• This section explains the specifications of the machine.
10. Structure and function
• This section explains the structure and function of the machine. The section of “Structure and function” serves not only to give an understanding for the structure of each component, but also serves as reference material for troubleshooting.
20. Standard value table
• The standard values for a new machine and trouble shooting are described. This standard value table is used for testing and adjusting, and determining a failure at troubleshooting.
50. Disassembly and assembly
• This section explains the procedures for removing, installing, disassembling, and assembling each part or component and the special tools for the works as well as precautions for doing them safely. In addition, tightening torque, and quantity and weight of coating material, oil, grease, and coolant required for the works are also explained.
60. Maintenance standard
• This section describes the maintenance standard values for each component. This section gives the criterion values for each component and required remedy at disassembly or maintenance.
TABLE OF CONTENTS:
KOMATSU 125E-6 SERIES ENGINE SERVICE REPAIR MANUAL (SEN05624-02) KOMATSU 125E-6
COVER............................................................................. 1 00 Index and foreword ............................................................ 3 Index ........................................................................ 4 Foreword, safety and general information ..................................... 7 Important safety notice .................................................. 7 How to read the shop manual .............................................. 14 Explanation of terms for maintenance standard ............................ 15 Handling equipment of fuel system devices ................................ 17 Handling of intake system parts .......................................... 18 Handling of hydraulic equipment .......................................... 19 Method of disconnecting and connecting of push-pull type coupler ......... 21 Handling of electrical equipment ......................................... 24 How to read electric wire code ........................................... 32 Precautions when performing operation .................................... 35 Standard tightening torque table ......................................... 39 List of abbreviation ..................................................... 43 Conversion table ......................................................... 48 01 Specification ................................................................. 53 Table of contents ............................................................ 54 Specifications ............................................................... 55 Exhaust gas regulation ................................................... 55 Applicable machines ...................................................... 58 Specifications ........................................................... 59 General view ............................................................. 62 Weight table ............................................................. 76 Engine performance curve ................................................. 77 10 Structure and function ........................................................ 81 Table of contents ............................................................ 82 Components layout ............................................................ 83 Components layout drawing ................................................ 83 Intake and exhaust system parts .............................................. 86 Intake and exhaust system layout drawing ................................. 86 Intake and exhaust system circuit diagram ................................ 87 Air cleaner .............................................................. 89 KVGT ..................................................................... 90 Aftercooler .............................................................. 96 EGR system piping drawing ................................................ 97 EGR system circuit diagram ............................................... 99 EGR valve ................................................................100 EGR cooler ...............................................................102 Mixing connector .........................................................104 KCCV layout drawing ......................................................105 KCCV ventilator ..........................................................107 KDPF .....................................................................111 Engine main body parts .......................................................115 Cylinder head ............................................................115 Cylinder block ...........................................................117 Main moving parts ........................................................119 Vibration damper .........................................................122 Timing gear ..............................................................123 Front cover ..............................................................125 Valve system .............................................................126 Flywheel and flywheel housing ............................................129 Lubrication system ...........................................................130 Lubrication system parts layout drawing ..................................130 Lubrication system diagram ...............................................131 Oil pump .................................................................132 Boost oil pump ...........................................................133 Oil filter ...............................................................134 Oil cooler ...............................................................135 Oil cooler thermo-valve ..................................................136 Oil pan ..................................................................137 Fuel system ..................................................................138 Fuel system parts layout drawing .........................................138 Fuel system circuit diagram ..............................................140 Outline of CRI system ....................................................143 Fuel dozing ..............................................................156 Fuel cooler ..............................................................159 Pre-filter ...............................................................160 Main filter ..............................................................161 Cooling system ...............................................................162 Cooling system parts layout drawing ......................................162 Cooling system circuit diagram ...........................................163 Water pump ...............................................................164 Thermostat ...............................................................165 Electrical equipment .........................................................167 Alternator ...............................................................167 Alternator mounting ......................................................171 Starting motor ...........................................................172 Fuel feed pump ...........................................................176 Fuel feed pump switch ....................................................177 Engine wiring harness ....................................................178 Engine controller ........................................................180 Sensor ...................................................................186 20 Standard value table ..........................................................199 Table of contents ............................................................200 Standard service value table .................................................201 Standard value table for engine ..........................................201 Running-in standard and performance test standard ........................207 50 Disassembly and assembly ......................................................211 Table of contents ............................................................212 General information on disassembly and assembly ..............................213 How to read this manual ..................................................213 Coating materials list ...................................................215 Special tool list ........................................................219 Sketch of special tool ...................................................221 Disassembly and assembly .....................................................224 General disassembly of engine ............................................224 General assembly of engine ...............................................245 Removal and installation procedure of supply pump as single component ....290 Engine front oil seal replacement procedure ..............................295 Engine rear oil seal replacement procedure ...............................298 60 Maintenance standard ..........................................................303 Table of contents ............................................................304 Intake and exhaust system parts ..............................................305 KVGT .....................................................................305 Engine main body parts .......................................................306 Cylinder head ............................................................306 Cylinder block ...........................................................307 Cylinder liner ...........................................................309 Crankshaft ...............................................................310 Cam follower and push rod ................................................311 Piston ...................................................................313 Connecting rod ...........................................................315 Vibration damper .........................................................317 Timing gear ..............................................................318 Camshaft .................................................................319 Valve and valve guide ....................................................320 Rocker arm ...............................................................322 Crosshead and guide ......................................................323 Flywheel .................................................................324 Lubrication system ...........................................................326 Main relief valve ........................................................326 Safety valve .............................................................327 Cooling system ...............................................................328 Oil cooler ...............................................................328 Water pump ...............................................................329 Thermostat ...............................................................330 INDEX.............................................................................331
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⦁ This is not a physical manual but a digital manual – meaning no physical copy will be couriered to you. The manual can be yours in the next 2 mins as once you make the payment, you will be directed to the download page IMMEDIATELY.
⦁ This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
⦁ Require some other service manual or have any queries: please WRITE to us at [email protected]