Komatsu 6D125 Series Diesel Engine Shop Manual SEBE61500109

Description

• Model List:
  • 6D125 Series Diesel Engine

• 1. MAIN MENU
• 2. CONTENTS
• 3. GENERAL
• 3.1. GENERAL VIEW
• 3.2. SPECIFICATIONS
• 3.3. GENERAL ASSEMBLY DRAWING
• 3.4. ENGINE PERFORMANCE CURVE
• 3.5. WEIGHT TABLE
• 4. STRUCTURE AND FUNCTION
• 4.1. GENERAL STRUCTURE
• 4.2. INTAKE AND EXHAUST SYSTEM
• 4.2.1. INTAKE AND EXHAUST SYSTEM
• 4.2.2. TURBOCHARGER
• 4.3. ENGINE BODY
• 4.3.1. CYLINDER HEAD
• 4.3.2. VALVE SYSTEM
• 4.3.3. CYLINDER BLOCK
• 4.3.4. MAIN CIRCULATION PART
• 4.3.5. TIMING GEAR
• 4.3.6. FLYWHEEL AND FLYWHEEL HOUSING
• 4.4. LUBRICATION SYSTEM
• 4.4.1. LUBRICATION SYSTEM CHART
• 4.4.2. OIL PUMP
• 4.4.3. REGULATOR VALVE
• 4.4.4. OIL FILTER
• 4.4.5. OIL COOLER
• 4.5. FUEL SYSTEM
• 4.5.1. FUEL SYSTEM CHART
• 4.5.2. FUEL INJECTION PUMP
• 4.5.3. FUEL INJECTION NOZZLE
• 4.5.4. FUEL FILTER
• 4.5.5. MAGNETIC SWITCH (FUEL CUT SOLENOID)
• 4.6. COOLING SYSTEM
• 4.6.1. COOLING SYSTEM CHART
• 4.6.2. WATER PUMP
• 4.6.3. THERMOSTAT
• 4.6.4. CORROSION RESISTOR
• 4.7. ELECTRICAL SYSTEM
• 4.7.1. ALTERNATOR
• 4.7.2. STARTING MOTOR
• 4.7.3. ELECTRICAL INTAKE AIR HEATER
• 4.8. ACCESSORY
• 4.8.1. AIR COMPRESSOR
• 4.8.2. EXHAUST BRAKE
• 5. TESTING AND ADJUSTING
• 5.1. ENGINE BODY
• 5.1.1. ADJUSTING VALVE CLEARANCE
• 5.1.2. MEASURING COMPRESSION PRESSURE
• 5.2. FUEL SYSTEM
• 5.2.1. CHECKING AND ADJUSTING FUEL INJECTION TIMING
• 5.2.2. TESTING AND ADJUSTING FUEL CUT SOLENOID
• 5.2.3. ADJUSTING ENGINE STOP MOTOR CABLE
• 5.2.4. FUEL INJECTION PUMP CALIBRATION DATA
• 5.3. PERFORMANCE TEST
• 5.3.1. RUNIN STANDARD
• 5.3.2. PERFORMANCE TEST CRITERIA
• 5.3.3. TESTING AND ADJUSTING TOOL LIST
• 5.3.4. TESTING AND ADJUSTING DATA
• 5.4. TROUBLESHOOTING
• 5.4.1. POINTS TO REMEMBER WHEN TROUBLESHOOTING
• 5.4.2. METHOD OF USING TROUBLESHOOTING CHART
• 5.4.3. S1 Starting performance is poor (Starting always takes time)
• 5.4.4. S2 Engine does not start
• 5.4.4.1. Engine does not turn
• 5.4.4.2. Engine turns but no exhaust gas comes out (Fuel is not being injected)
• 5.4.4.3. Exhaust gas comes out but engine does not start (Fuel is being injected)
• 5.4.5. S3 Engine does not pick up smoothly (Followup is poor)
• 5.4.6. S4 Engine stops during operations
• 5.4.7. S5 Engine does not rotate smoothly (hunting)
• 5.4.8. S6 Engine lacks output (no power)
• 5.4.9. S7 Exhaust gas is black (incomplete combustion)
• 5.4.10. S8 Oil consumption is excessive (or exhaust gas is blue)
• 5.4.11. S9 Oil becomes contaminated quickly
• 5.4.12. S10 Fuel consumption is excessive
• 5.4.13. S11 Oil is in cooling water, or water spurts back, or water level goes down
• 5.4.14. S12 Oil pressure lamp lights up (drop in oil pressure)
• 5.4.15. S13 Oil level rises
• 5.4.16. S14 Water temperature becomes too high (overheating)
• 5.4.17. S15 Abnormal noise is made
• 5.4.18. S16 Vibration is excessive
• 6. DISASSEMBLY AND ASSEMBLY
• 6.0.1. DISASSEMBLY AND ASSEMBLY
• 7. MAINTENANCE STANDARD
• 7.1. INTAKE AND EXHAUST SYSTEM
• 7.1.1. TURBOCHARGER
• 7.2. ENGINE BODY
• 7.2.1. CYLINDER HEAD
• 7.2.2. VALVE AND VALVE GUIDE
• 7.2.3. ROCKER ARM SHAFT
• 7.2.4. CROSSHEAD
• 7.2.5. CYLINDER BLOCK
• 7.2.6. CYLINDER LINER
• 7.2.7. CRANKSHAFT
• 7.2.8. CAMSHAFT
• 7.2.9. CAM FOLLOWER AND PUSH ROD
• 7.2.10. PISTON, PISTON RING AND PISTON PIN
• 7.2.11. CONNECTING ROD
• 7.2.12. TIMING GEAR
• 7.2.13. FLYWHEEL AND FLYWHEEL HOUSING
• 7.2.14. VIBRATION DAMPER
• 7.3. COOLING SYSTEM
• 7.3.1. WATER PUMP AND THERMOSTAT
• 7.3.2. OIL COOLER
• 7.4. LUBRICATION SYSTEM
• 7.4.1. OIL PUMP
• 7.4.2. MAIN RELIEF VALVE
• 7.4.3. REGULATOR VALVE AND SAFETY VALVE
• 7.5. ACCESSORY
• 7.5.1. AIR COMPRESSOR
• 8. REPAIR AND REPLACEMENT OF PARTS
• 8.1. REPLACING VALVE SEAT INSERTS
• 8.2. REPLACING NOZZLE HOLDER SLEEVE
• 8.3. REPLACING VALVE GUIDE
• 8.4. REPLACING CROSS HEAD GUIDE
• 8.5. GRINDING THE VALVE
• 8.6. REPLACING CAM BUSHING
• 8.7. REPLACING FLYWHEEL RING GEAR
• 8.8. REPLACING CAM GEAR
• 8.9. PRESSURE TEST