Combined repair and diagnostics manual for the John Deere 790 and 792 excavators, with complete theory of operation, testing procedures and repair instructions for every major system.
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This is the Technical Manual (TM1320, dated 08MAR90) covering both the John Deere 790 and 792 excavators together in a single combined volume. Unlike some John Deere product lines that split repair and diagnostic information into two separate books, this manual deliberately brings both together: repair sections tell you how to actually fix a component once it's identified as the problem, while the operation and test sections are built to help you identify the majority of routine failures quickly before you ever remove a part.
The manual is organized in groups by component, and at the start of every group you'll find a summary listing of exactly what you need before starting - essential tools, service equipment, other materials, parts kits, specifications, wear tolerances, and torque values - so there are no surprises partway through a job. This structure reflects John Deere's broader Technical Manual philosophy: these books are meant to be concise, on-the-job references containing only what's needed for diagnosis, analysis, testing, and repair, rather than a general training document.
Across its roughly 500 pages, the manual works through the complete machine: the diesel engine, electrical system, power train, and hydraulic system, each covered with the theory needed to understand how the system is supposed to work, the diagnostic steps to find out why it isn't, and the full repair procedures to correct it. For a technician servicing either a 790 or a 792, having both repair and diagnostic information in one manual means fewer reference switches during a troubleshooting job - everything needed to go from "what's wrong" to "it's fixed" is in this single book.
| Models | 790, 792 Excavator |
|---|---|
| Manual Number | TM1320 (08MAR90) |
| Manual Type | Combined Repair and Operation/Test |
| Documentation Family | Fundamentals of Service (FOS), Technical Manual, Component Technical Manual |
| Format | Grouped by component with repair and diagnostic sections |
| John Deere 790/792 Excavator Technical Manual (TM1320) | John Deere 790 and 792 excavator technical manual: combined repair and diagnostics for engine, electrical, power train and hydraulic systems. |
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