## John Deere Combine Service Manual: S540, S550, S660, S670, S680, and S690

This comprehensive service manual is your essential guide for diagnosing, troubleshooting, and repairing your John Deere Combine. Packed with detailed information and high-quality illustrations, it empowers you to confidently tackle any maintenance or repair challenge.

**This manual features:**

* **Clear and detailed explanations** of each system\'s operation, ensuring you understand the mechanics behind the machine.
* **Comprehensive schematics** that visually guide you through wiring diagrams and component layouts.
* **Step-by-step diagnostic procedures** to quickly pinpoint the source of any problems, saving you time and frustration.
* **Printable format** for easy access and reference both at home and in the field.
* **Searchable text and bookmarks** for effortless navigation throughout the manual\'s extensive content.
* **Complete coverage for models S540, S550, S660, S670, S680, and S690 (S.N: 000001-120099).**

**This is a diagnostic manual. Repair manuals are sold separately.**

**Key Topics Covered:**

* **General Information:** Safety, Combine Identification, Specifications
* **Diagnostic Trouble Codes:** Accessing Codes, Troubleshooting Specific Systems
* **Engine System:** Theory of Operation, Diagnostics
* **Air Intake and Cooling System:** Theory of Operation, Diagnostics
* **Electrical System:** Theory of Operation, Schematics, Diagnostics
* **Electrical Control Units:** Accessing Diagnostic Codes, Theory of Operation, Schematics, Diagnostics
* **Drives (S540, S550, S660, S670):** Preliminary Checks, Hydraulic Specifications, Theory of Operation, Schematics, Diagnostics
* **Drives (S680 and S690):** Preliminary Checks, Hydraulic Specifications, Theory of Operation, Schematics, Diagnostics
* **Steering and Brakes (S540, S550, S660, S670):** Preliminary Checks, Hydraulic Specifications, Theory of Operation, Schematics, Diagnostics
* **Steering and Brakes (S680 and S690):** Preliminary Checks, Hydraulic Specifications, Theory of Operation, Schematics, Diagnostics
* **Hydraulic System:** Theory of Operation, Schematics, Diagnostics, Key Reference Points, Component Details
* **Main Gearcase:** Preliminary Checks, Hydraulic Specifications, Theory of Operation, Schematics, Diagnostics, Key Reference Points, Component Details
* **Cab/Operator Station:** Specifications, Theory of Operation, Schematics, Diagnostics, Component Details

**Order your copy today and unlock the full potential of your John Deere Combine!**