John Deere 6068 4-Valve Diesel Engine – Level 25 ECU Repair Manual

Model: 6068 4-Valve Diesel Engine – Level 25 ECU

Type: Engines

Language: English

Format: PDF

John Deere 6068 4-Valve Diesel Engine – Level 25 ECU Repair Manual (CTM139019) – 1277 Pages

6068 4-Valve Diesel Engine – Level 25 ECU Manual Table of Content

Section 01—General Information

Group 000—Safety

Group 001—Engine Identification

Group 002—Fuels, Lubricants, and Coolant

Section 02—Repair and Adjustments

Group 010—Engine Rebuild

Group 020—Cylinder Head and Valve Repair and Adjustment

Group 030—Cylinder Block, Liners, Pistons, and Rods Repair and Adjustment

Group 040—Crankshaft, Main Bearings, Flywheel Repair, and Adjustment

Group 050—Camshaft and Timing Gear Train Repair and Adjustment

Group 060—Lubrication System Repair and Adjustment

Group 070—Cooling System Repair and Adjustment

Group 080—Air Intake and Exhaust System Repair and Adjustment

Group 090—Electronic Fuel System Repair and Adjustment

Group 100—OEM Starting and Charging Systems Repair and Adjustment

Group 110—Electrical Engine Control Repair and Adjustment

Group 112—Connector Repair and Adjustment

Section 03—Theory of Operation

Group 120—PowerTech Plus Base Engine Operation

Group 123—Cooling System

Group 126—Lubrication System

Group 130—Electronic Fuel System

Group 135—Air Intake and Exhaust System

Group 140—Electrical Control System

Section 04—Diagnostics

Group 150—Observable Diagnostics

Group 155—Checks, Tests, and Procedures

Group 160—Diagnostic Instructions and Information

Group 161—DTC SPN – 000001—000199

Group 162—DTC SPN – 000200—000699

Group 163—DTC SPN – 000700—001999

Group 164—DTC SPN – 002000—002299

Group 165—DTC SPN – 002300—002999

Group 166—DTC SPN – 003000—003999

Group 167—DTC SPN – 004000—529999

Section 05—Tools and Other Materials

Group 170—Special Tools

Group 180—Lubricants, Sealants, and Other Materials

Section 06—Specifications

Group 200—General Engine Specifications

Group 210—Diagnostic Specifications

John Deere 6068 4-Valve Diesel Engine – Level 25 ECU Repair Manual

This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use.

This manual covers the base engine for PowerTech 6.8L engines including PowerTech “Plus” engine models. Information in this manual is organized in sections and sub divided into groups.

Section 01 covers the safety measures to follow while repairing the engine; engine identification features, engine emission and application details, and information about the fuels, lubricants, and coolants.

Section 02 covers the repair and adjustment procedures.

Section 03 explains the theory of operation of each system.

Section 04 is the diagnostics section that provides troubleshooting procedures to find problems.

Section 05 covers other materials needed to do the job.

Section 06 summarizes all specifications, wear tolerances, and torque values.

This manual contains SI Metric units of measure followed immediately by the U.S. customary units of measure.

Most hardware on these engines is metric sized. Component Technical Manuals are concise service guides for specific components. Component Technical Manuals are written as stand-alone manuals covering multiple machine applications.