Part of the John Deere Repair Manuals.
This is CTM104719, the factory Component Technical Manual for the John Deere PowerTech 6068 6.8L inline-6 diesel above 130 kW (174 hp), variants 6068HFC95 and 6068HFG95 with the Level 21 ECU, built roughly 2011 to 2016. This is an Interim Tier 4 / Stage IIIB engine, so it covers the whole electronic package: high-pressure common rail fuel, VGT turbo, EGR, and fuel-dosing aftertreatment. The biggest part of the book is diagnostics - symptom-based checks plus full fault code tables for engine, air, fuel, ECU, aftertreatment, and CAN communication. You also get repair procedures for the head, block, pistons, injectors, and turbo, plus torque specs down to the aftertreatment fittings (dosing injector final torque 25 N·m).
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 15-66 | Safety, Engine Identification and Emissions Certification, Fuels, Lubricants and Coolants |
| Repair and Adjustments | 67-665 | Cylinder Head, Valves, Block and Pistons, Hpcr Fuel System and Injectors, Turbocharger, EGR and Aftertreatment Service |
| Theory of Operation | 666-823 | Engine Systems Operation, ECU Control Strategy, Fuel Injection and Air Management |
| Diagnostics - Observable Symptoms, Checks and Tests | 824-1200 | Symptom-Based Diagnostics, Operational Checks, Test Procedures |
| Diagnostics - Engine, Air and Fuel System Fault Codes | 1201-2100 | Engine Position Diagnostics, Air Intake and Exhaust Fault Codes, Lubrication, Cooling and Fuel-System Codes |
| Diagnostics - ECU, Aftertreatment and Communication Codes | 2101-2588 | ECU and Throttle Diagnostics, EGR, Vgt and Fuel-Dosing Aftertreatment Codes, Application and CAN Communication Diagnostics |
| Tools and Other Materials | 2589-2644 | Required Service Tools, Dealer-Fabricated Tools, Sealants and Lubricants |
| Specifications | 2645-2704 | Torque Values and Clearances, Test Specifications, Aftertreatment Fitting Torques |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 6068HFC95, 6068HFG95 | ||
| Engine | PowerTech 6068, 6.8 L inline-6 turbocharged diesel | p. 7 |
| Rated Power | above 130 kW (174 hp) | p. 7 |
| Emissions Tier | Interim Tier 4 / Stage IIIB | p. 7 |
| Fuel System | High-pressure common rail (HPCR), Level 21 ECU | p. 7 |
| Aftertreatment | ||
| 90-degree Elbow Fitting Torque | 34 N·m (25 lb-ft) | p. 2645 |
| Air Bleed Fitting Torque | 23 N·m (17 lb-ft) | p. 2645 |
| Fuel Dosing Injector Final Torque | 25 N·m (19 lb-ft) | p. 2645 |
| Coolant Line Adapter Fitting Torque | 30 N·m (22 lb-ft) | p. 2645 |
| Clamp Joint Torque | 16.9 N·m (12.5 lb-ft) | p. 2645 |
