Production years
1993-1994
Case IH combine ยท 1993-1994
Case IH 1666 Combine
The Case IH 1666 is a mid-size 1990s Axial-Flow combine that brought the proven single-rotor system to many corn and grain farms. Its 215 hp 8.3 L engine and 180-bushel tank make it a practical, well-known classic rotary combine.
Threshing system
Axial-Flow single axial rotor
Engine
CDC/Cummins 8.3 L six-cylinder diesel, 215 hp
Grain tank capacity
180 bu
Case IH 1666 specifications
| Production years | 1993-1994 |
|---|---|
| Threshing system | Axial-Flow single axial rotor |
| Engine | CDC/Cummins 8.3 L six-cylinder diesel, 215 hp |
| Grain tank capacity | 180 bu |
| Header compatibility | Case IH 1020 grain platforms, 1000 Series corn heads, and pickup headers; 15-25 ft grain platforms commonly used |
| Weight | Approx. 21,000 lb without header |
| Rotor | Single longitudinal rotor with interchangeable concaves |
| Drive | Hydrostatic ground drive |
What the 1666 is used for
The 1666 was designed for diversified and medium-sized farms harvesting corn, soybeans, wheat, and small grains. Its capacity fits smaller field sizes and moderate acres well, while the rotary system offers good crop adaptability with correct concaves and settings.
It remains a practical low-cost combine for smaller farms, specialty crops, and backup duty. Many owners value it because its systems are relatively understandable, and the Axial-Flow platform has a large owner and independent-parts community.
Why the Case IH 1666 stands out
The 1666 is popular because it combines the established Axial-Flow design with manageable size, familiar mechanical systems, and substantial aftermarket support. It is often considered a durable classic, although condition matters much more than age alone. Confirm individual figures and options with manufacturer and TractorData.com records.
Buying a used Case IH 1666
Inspect the rotor, concaves, cage, transition cone, feeder chain, rock trap, auger bed, grain elevators, unloading auger, shoe bushings, and hydrostatic linkages. Check for worn or cracked sheet metal around high-crop-flow areas, and compare separator hours with the documented repair history rather than relying on appearance alone.
Case IH 1666 frequently asked questions
How much horsepower does a Case IH 1666 have?
It is commonly cited with a 215 hp 8.3 L diesel engine.
How large is the 1666 grain tank?
The standard grain tank is commonly listed at 180 bushels.
Are parts available for a Case IH 1666?
Yes, many OEM, aftermarket, and used parts remain available, but local dealer and salvage support should be checked before buying.
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.