Production years
1970-1978
John Deere combine ยท 1970-1978
John Deere 7700 Combine
The John Deere 7700 is a classic large conventional combine of the 1970s, built for six-row corn and substantial grain-platform work. Its robust cylinder-and-walker design gave it a strong reputation in its day and makes it a recognizable collector and small-farm machine now.
Threshing system
Conventional cylinder and straw walkers
Engine
John Deere 404 cu in six-cylinder diesel, commonly 128 hp; turbo versions were higher-rated
Grain tank capacity
169 bu
John Deere 7700 specifications
| Production years | 1970-1978 |
|---|---|
| Threshing system | Conventional cylinder and straw walkers |
| Engine | John Deere 404 cu in six-cylinder diesel, commonly 128 hp; turbo versions were higher-rated |
| Grain tank capacity | 169 bu |
| Header compatibility | Grain platforms commonly 15-24 ft; 4- or 6-row corn heads |
| Weight | Approx. 18,000-19,000 lb, depending on configuration |
| Cylinder | Conventional 22 in by 44 in cylinder |
| Drive | Gear drive or optional hydrostatic drive |
What the 7700 is used for
The 7700 was designed as a large 1970s combine for corn, soybeans, wheat, and other grain crops, especially on farms moving into six-row harvesting. Its conventional design can be desirable for operators who want straw left in better condition than a rotary machine typically provides.
Today, good examples are used on small acreages, by hobby and heritage operators, and where a low-complexity machine is preferred. It is not a modern high-capacity combine, but a well-maintained unit can still harvest a modest crop efficiently.
Why the John Deere 7700 stands out
The 7700 is one of Deere's best-known classic combines and was a major six-row machine in its era. It is admired for its durable basic construction and familiar Deere layout, though condition is critical because many survivors have high hours, outdoor storage history, or obsolete components.
Buying a used John Deere 7700
Inspect the feederhouse throat, cylinder and concave, walkers, shoe frame and bushings, clean-grain elevator boot, grain-shoe auger floor, unloading system, belts, chains, hydrostatic drive, final drives, and cab air conditioning. Rust and cracked shoe components are recurring concerns, and parts availability varies, so verify the actual model year, engine, and configuration through TractorData.com and manufacturer records.
John Deere 7700 frequently asked questions
What engine is in a John Deere 7700 combine?
A common diesel configuration uses a John Deere 404 cu in six-cylinder engine rated around 128 hp.
How much grain does a John Deere 7700 hold?
The commonly cited grain tank capacity is 169 bushels.
Are parts still available for a John Deere 7700?
Many wear parts are available through aftermarket suppliers and salvage yards, but availability for some original components can vary.
Specifications are commonly cited figures for general reference; exact figures vary by year and serial number, so confirm against TractorData.com and the machine's records. Values and prices of used combines vary by condition, hours, and region. Page updated Aug 4, 2026.