Technical manual for the John Deere 790 compact utility tractor, covering the Yanmar diesel engine, electrical system, power train, hydraulics, steering and brakes.
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This is the Technical Manual (TM2088) for the John Deere 790 compact utility tractor, built around the Yanmar 3TNE82A 3-cylinder diesel engine, rated at 20.1 kW (27 hp) gross power and 17.9 kW (24 hp) at the PTO. It's the North American edition, published by John Deere's Worldwide Commercial and Consumer Equipment Division, and it's written for an experienced technician working on this specific model rather than as a general introduction.
The engine section covers the full diesel fuel and air system, cooling system, and lubrication system, with complete theory of operation, a diagnostic troubleshooting table, and every test and adjustment a technician would need - compression testing, valve clearance, injection pump timing, and more - followed by full teardown and rebuild procedures for the cylinder head, pistons, crankshaft, camshaft, and fuel injection components.
Past the engine, the manual covers the electrical system, the power train (including the single and dual stage clutch options, the sliding gear transmission, mechanical front-wheel drive, and both the rear and mid PTO), hydraulics, steering, brakes, and a miscellaneous section. Each system gets the same treatment: theory of operation, diagnostics, tests and adjustments, and full repair procedures. Serial number locations for both the machine's Product Identification Number and the engine serial number are also documented up front, so you can confirm exactly which configuration you're working on before starting a repair. If you're maintaining or rebuilding a 790, this manual has the specifications and step-by-step procedures to do the job correctly the first time.
| Engine | Yanmar 3TNE82A, 3-cylinder diesel |
|---|---|
| Gross Power | 20.1 kW (27 hp) |
| Manual Number | TM2088 |
| Edition | North American Version |
| Power Train | Single or dual stage clutch, sliding gear transmission |
| Publisher | John Deere Worldwide Commercial and Consumer Equipment Division |
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