John Deere PowerTech 4.5L, 6.8L Diesel Engines Level 4 Fuel Systems – Bosch VP44 Pump Repair Manual

Table of Content
Section 01—General
Group 000—Safety
Group 001—Engine Identification
Group 002—Fuels
Section 02—Repair and Adjustments
Group 090—Electronic Fuel System Repair and Adjustments
Group 110—Electrical Engine Control Repair and Adjustment
Section 03—Theory of Operation
Group 130—Electronic Fuel 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—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 covers only Level 4 Electronic Fuel Systems with the Bosch VP44 injection pump. It is one of five volumes on 4.5 L and 6.8 L engines. There are four companion manuals which cover the base engine and mechanical fuel system repair, operation and diagnostics: Other manuals will be added in the future to provide additional information on electronic fuel systems as needed.
Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.
This is the safety-alert symbol. When you see this symbol on the machine or in this manual, be alert to the potential for personal injury.
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 summary listings of all applicable essential tools, service equipment and tools, other materials needed to do the job, service parts kits, specifications, wear tolerances, and torque values.
Before beginning repair on an engine, clean the engine.
Most hardware on these engines is 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.