John Deere 4045, 6068 – Level 14 ECU Diesel Engine Repair Manual (CTM320)

Table of Content
Section 01—General
Group 000—Safety
Group 001—Engine Identification
Group 002—Fuels, Lubricants, and Coolant
Group 003—Fuel System Identification
Section 02—Repair and Adjustments
Group 090—Electronic Fuel System Repair and
Adjustments Group 100—Electronic Air System Repair and Adjustment
Group 110—Electronic Engine Control Repair and Adjustment
Section 03—Theory Of Operation
Group 130—Electronic Fuel System Operation
Group 135—Electronic Air System Operation
Group 140—Electronic Control System Operation
Section 04—Diagnostics
Group 150—Observable Diagnostics and Tests
Group 160—Trouble Code Diagnostics and Tests
Section 05—Tools and Other Materials
Group 170—Special Tools
Group 180—Lubricants, Sealants, and Other Materials
Section 06—Wiring Harness and Schematics
Group 190—Wiring Harness Information
Group 191—Wiring Harness Information — Marine
Group 195—Electrical Schematics
Group 196—Electrical Schematics — Marine
Section 07—Specifications
Group 200—Repair Specifications
Group 210—Diagnostic Specifications
Essential tools required in performing certain service work are identified in this manual and are recommended for use.
This manual (CTM320) covers only Level 14 Electronic Fuel System with the Denso High Pressure Common Rail (HPCR). It is one of six volumes on 4.5 L and 6.8 L engines. The following companion manual covers the base engine and mechanical fuel system. Each manual covers repair, operation, and diagnostics.
• CTM104—Base Engine
Other manuals will be added in the future to provide additional information on electronic fuel systems as needed.
Use this component technical manual in conjunction with the machine technical manual. An application
listing in Section 01, Group 001 identifies
product-model/component type-model relationship.
See the machine technical manual for information on component removal and installation, and gaining access to the components.
Information is organized in sections and groups for the various components requiring service instruction. At the beginning of each group are summaries of the up coming group.
Before beginning repair on an engine, clean the engine.
Most hardware on these engines are metric sized.
Some components of this engine may be serviced without removing the engine from the machine. Refer to the specific machine technical manual for information on components that can be serviced without removing the engine from the machine and for engine removal and installation procedures.