AGCO Allis 6600 series
3 models in this series
AGCO Allis 6600 series, types 6670 to 6690 – four-cylinder diesels from the US maker in Duluth: 51.5 to 66.2 kW, 2,800 to 3,110 kg, 4,000 cm³ displacement
AGCO Allis was formed in 1990 when the newly founded US group AGCO, headquartered in Duluth, Georgia, took over the agricultural machinery division of Allis-Chalmers and for a time built the tractors under the combined name AGCO Allis. The 6600 series with the types 6670, 6680 and 6690 represented the mid power class; the last two digits order the models by ascending power. Production initially took over much of the existing Allis-Chalmers plants and supplier structure, before AGCO gradually switched the model range to its own series.
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The register lists 3 versions with 51.5 to 66.2 kW (63 to 80 hp) from four-cylinder diesel engines of 4,000 cm³ displacement, torque of 239 to 304 Nm at 2,350 to 2,500 rpm. Unladen weights range from 2,800 to 3,110 kg, lengths from 4,064 to 4,094 mm, widths from 1,970 to 2,093 mm and heights from 2,743 to 2,824 mm.
As general-purpose tractors for mid-sized farms, the 6600 series competed directly with equally powerful models from Ford, Case IH and its own group sibling Massey Ferguson; the short lifespan of the AGCO Allis brand in the early 1990s makes these types comparatively rare today. The cab offered comfort typical for the era, with power steering and an enclosed operator station, which also suited the tractor to longer days of field work.
When buying used, what counts is the operating hours and service condition of the four-cylinder diesel, clutch and gearbox, the condition of the hydraulics and PTO, and corrosion on body panels; parts now mostly run through the AGCO dealer network.
Sources: SpecCodex register, model data: AGCO Allis 6600er-Baureihe
Models compared
3 of 3 models.
| 66701991–1999 | 66801991–1997 | 66901991–1997 | |
|---|---|---|---|
| Power | 51.5 kW | 58.8 kW | 66.2 kW |
| Rated speed | 2,350 rpm | 2,500 rpm | 2,500 rpm |
| Cylinders | 4 | 4 | 4 |
| Displacement | 4,000 cm³ | 4,000 cm³ | 4,000 cm³ |
| Torque | 239 Nm | 261 Nm | 304 Nm |
| Top speed | 30 km/h | 30 km/h | 30 km/h |
| Wheelbase | 2,398 mm | 2,449 mm | 2,449 mm |
| Length | 4,064 mm | 4,094 mm | 4,094 mm |
| Width | 1,970 mm | 2,093 mm | 2,093 mm |
| Height | 2,743 mm | 2,824 mm | 2,824 mm |
| Unladen weight | 2,800 kg | 3,050 kg | 3,110 kg |
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
6670
The AGCO Allis 6670 is a model in the 6600er series. Production: 1991–1999. The engine delivers 70 hp (51.5 kW), has...
6680
With the 6680, AGCO Allis offers a model from the 6600er series. Production: 1991–1997. The engine delivers 80 hp...
6690
The 6690 from AGCO Allis is part of the 6600er series. Production: 1991–1997. The engine delivers 90 hp (66.2 kW),...
