John Deere Powertech 6.8l 8.1l Compressed Natural Gas Engines Operation And Diagnostics Manual (CTM146)
Other Manual: John Deere PowerTech 6.8L 6068 CTM113
John Deere PowerTech 6.8L 6068 Natural Gas Engines Technical Manual
Service Manual: Table of Contents
| Section | Topics & Sub-topics |
|---|---|
| Front Matter | Foreword • About This Manual |
| Safety | Handle Fluids/Natural Gas Safely • Prevent Battery Explosions & Acid Burns • Emergency Prep • High-Pressure & CNG Safety • Protective Clothing • Proper Tools & Lifting • Waste Disposal |
| General Information | Torque Values (Inch/Metric) • Engine Model & Serial Number Identification |
| Fuels, Lubricants & Coolant | Natural Gas Recommendations • Engine Oils • Synthetic Lubricants • Grease • Coolant Specifications & Maintenance • Climate Considerations |
| Engine Mounting | Repair Stands • Safety Precautions • Lifting Procedures • Mounting & Dismounting |
| Engine Rebuild Guide | Disassembly/Assembly Sequences • Sealant Application Guidelines |
| Cylinder Head & Valves | Tools & Specs • Valve Clearance & Lift • Rocker Arm & Camshaft Followers • Valve Grinding • Head Flatness • Valve Seat Inserts • Installation & Break-in |
| Cylinder Block, Liners, Pistons & Rods | Tools & Specs • Piston/Rod Removal • Liner Inspection & Deglazing • Ring Groove Wear • Piston-to-Liner Clearance • Bearing Inspection • Liner Installation |
| Crankshaft, Main Bearings & Flywheel | Vibration Damper • Oil Seals • Flywheel & Ring Gear • Bearing Failure Analysis • End Play • Crankshaft Grinding & Installation |
| Camshaft & Timing Gear Train | Timing Gear Cover • End Play & Backlash • Camshaft Bushings • Lobe Height • Idler Shafts • Engine Timing |
| Lubrication System | Troubleshooting • Oil Cooler & Filter Base • Bypass/Regulating Valves • Oil Pump Disassembly & Assembly • Oil Pan |
| Cooling System | Thermostats • Water Pump Rebuild • Belt Tensioner • Idler Pulleys • Coolant Heater |
| Air Intake & Exhaust System | Turbocharger Maintenance & Failure Analysis • Wastegate Adjustment • Manifold Inspection • PCV Orifice |
| Fuel Supply System | Leak-Off & Leak Check Procedures • Natural Gas Regulator • Fuel Metering Valve • Fuel Mixer |
| Starting & Charging System | Starter Removal & Bench Testing • Solenoid & No-Load Tests • Alternator Troubleshooting & Output Testing |
| Electronic Engine Controls | Spark Plugs & Ignition Coils • ICU • Sensors (Cam, Crank, ECT, MAP, MAT, UEGO, etc.) • Electronic Throttle • Wiring Harness • Connector Repair (Weather Pack, Metri-Pack, Deutsch) |
| Miscellaneous Accessories | Air Compressor Inspection & Removal • Idler Housing |
| Dealer Fabricated Tools | Custom Tool Specifications • Cylinder Liner Holding Fixture |
John Deere PowerTech 6.8L 6068 Natural Gas Engines Technical Manual