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Model List:
- PowerTech 6.8 L 6068 Compressed Natural Gas Engine
- 1. Contents
- 1.1. Identification Numbers
- 1.1.1. Record Engine Serial Number
- 1.1.2. Engine Option Codes
- 1.1.3. Handle Compressed Natural Gas Safely
- 1.1.4. Recognize Safety Information
- 1.1.5. Understand Signal Words
- 1.1.6. Follow Safety Instructions
- 1.1.7. Replace Safety Signs
- 1.1.8. Illuminate Work Area Safely
- 1.1.9. Work in Clean Area
- 1.1.10. Use Proper Tools
- 1.1.11. Live With Safety
- 1.1.12. Prevent Machine Runaway
- 1.1.13. Handle Fuel SafelyAvoid Fires
- 1.1.14. Prepare for Emergencies
- 1.1.15. Handle Starting Fluid Safely
- 1.1.16. In Case of Fire
- 1.1.17. Handle Fluids SafelyAvoid Fires
- 1.1.18. Avoid Static Electricity Risk When Refueling
- 1.1.19. Service Machines Safely
- 1.1.20. Wear Protective Clothing
- 1.1.21. Protect Against Noise
- 1.1.22. Handling Batteries Safely
- 1.1.23. Prevent Acid Burns
- 1.1.24. Stay Clear of Rotating Drivelines
- 1.1.25. Install All Guards
- 1.1.26. Practice Safe Maintenance
- 1.1.27. Remove Paint Before Welding or Heating
- 1.1.28. Avoid Heating Near Pressurized Fluid Lines
- 1.1.29. Avoid HighPressure Fluids
- 1.1.30. Do Not Open HighPressure Fuel System
- 1.1.31. Protect Against High Pressure Spray
- 1.1.32. Prevent Battery Explosions
- 1.1.33. Avoid Hot Exhaust
- 1.1.34. Work In Ventilated Area
- 1.1.35. Service Cooling System Safely
- 1.1.36. Decommissioning Proper Recycling and Disposal of Fluids and Components
- 1.2. Fuels, Lubricants, and Coolant
- 1.2.1. Natural Gas Recommendations
- 1.2.2. Engine BreakIn Oil
- 1.2.3. Natural Gas Engine Oil
- 1.2.4. Oilscan and CoolScan
- 1.2.5. Cold Weather Operation
- 1.2.6. Alternative and Synthetic Lubricants
- 1.2.7. Mixing of Lubricants
- 1.2.8. Lubricant Storage
- 1.2.9. Recommended Engine Coolant
- 1.2.10. Engine Coolant Specifications
- 1.2.11. Testing Engine Coolant
- 1.2.12. Replenishing Supplemental Coolant Additives (SCA) Between Coolant Changes
- 1.2.13. Operating in Warm Temperature Climates
- 1.2.14. Disposing of Coolant
- 1.3. Operating the Engine
- 1.3.1. Engine BreakIn
- 1.3.2. Starting the Engine
- 1.3.3. Warming the Engine
- 1.3.4. Changing Engine Speed
- 1.3.5. Idling the Engine
- 1.3.6. Stopping the Engine
- 1.3.7. Using a Booster Battery or Charger
- 1.4. Lubrication and Maintenance
- 1.4.1. Required EmissionRelated Information
- 1.4.2. Observe Service Intervals
- 1.4.3. Use Correct Fuels, Lubricants, and Coolant
- 1.4.4. Lubrication and Maintenance Service Interval Chart
- 1.5. Lubrication and MaintenanceDaily
- 1.5.1. Lubrication and MaintenanceDaily
- 1.6. Maintenance12 Months/12,500 Miles
- 1.6.1. Servicing Battery
- 1.6.2. Changing Engine Oil and Filter
- 1.6.3. Checking Belt Tensioner
- 1.6.4. Checking Air Intake System
- 1.6.5. Checking Cooling System
- 1.6.6. Checking Effectiveness of Coolant Solution
- 1.6.7. Adding Supplemental Coolant Additives (SCA)
- 1.7. Maintenance24 Months/25,000 Miles
- 1.7.1. Cleaning PCV Orifice
- 1.7.2. Checking Crankshaft Vibration Damper
- 1.7.3. Inspecting Natural Gas Lines
- 1.7.4. Pressure Testing Cooling System
- 1.7.5. Flushing Cooling System
- 1.7.6. Replacing Spark Plugs
- 1.7.7. Removal of Seized Spark Plugs (Tool JDG1193 Not Available or Spark Plug Ceramic Stem Has Broken Off)
- 1.7.8. Inspecting Air Compressor
- 1.7.9. Checking and Adjusting Engine Valve Clearance
- 1.8. Service as Required
- 1.8.1. Additional Service Information
- 1.8.2. Replacing Belts
- 1.8.3. Replacing Air Cleaner Elements
- 1.8.4. Adding Coolant
- 1.9. Troubleshooting
- 1.9.1. Diagnostic Overview
- 1.9.2. Reading Diagnostic Fault Codes
- 1.9.3. Diagnostic Codes
- 1.10. Storage
- 1.10.1. Storing the Engine
- 1.10.2. Removing Engine From Storage
- 1.11. Specifications
- 1.11.1. General
- 1.11.2. Lubrication System
- 1.11.3. Cooling System
- 1.12. Lubrication and Maintenance Records
- 1.12.1. Using Lubrication and Maintenance Records
- 1.12.2. Daily (Prestarting) Service
- 1.12.3. Months/12,500 Miles Service
- 1.12.4. Months/25,000 Miles Service
- 1.12.5. Service as Required
- 1.13. Emissions System Warranty
- 1.13.1. John Deere Warranty in OEM Applications
- 1.13.2. Emission System Label
- 1.13.3. Emissions Control Warranty Statement (United States Only)
- 1.13.4. California Emission Control Warranty Statement (California Only)
- 1.14. John Deere Service Literature Available
- 1.14.1. Technical Information
- 1.14.2. Other Publications for This Engine
- 1.15. John Deere Service Keeps You on the Job
- 1.15.1. NO TITLE
- 2. Page Number
- 2.1. Section 01
- 2.2. Section 05
- 2.3. Section 10
- 2.4. Section 15
- 2.5. Section 20
- 2.6. Section 25
- 2.7. Section 30
- 2.8. Section 35
- 2.9. Section 50
- 2.10. Section 55
- 2.11. Section 60
- 2.12. Section 65
- 2.13. Section 70
- 2.14. Section 75
- 2.15. Section 80






