Production years
1985-1992
Case IH combine ยท 1985-1992
Case IH 1660 Combine
The Case IH 1660 is a mid-size Axial-Flow rotary combine from the first Case IH era and is one of the best-known older rotary machines. It is valued for a simple single-rotor design, good crop versatility, and strong long-term parts support.
Threshing system
Single-rotor Axial-Flow rotary threshing and separation
Engine
International Harvester DT-466 diesel or later Cummins 8.3L diesel, commonly cited at 190 hp
Grain tank capacity
180 bu
Case IH 1660 specifications
| Production years | 1985-1992 |
|---|---|
| Threshing system | Single-rotor Axial-Flow rotary threshing and separation |
| Engine | International Harvester DT-466 diesel or later Cummins 8.3L diesel, commonly cited at 190 hp |
| Grain tank capacity | 180 bu |
| Header compatibility | Case IH grain platforms and 4- to 6-row corn heads; 20-25 ft platforms common |
| Weight | Approximately 20,000 lb without header |
| Defining specification | Longitudinal single rotor, about 30 in diameter |
What the 1660 is used for
The 1660 was designed for medium-sized grain and row-crop farms that needed rotary crop handling without the size of the 1680. It can harvest corn, soybeans, wheat, rice, and small grains when fitted and adjusted for the crop.
Today, it is a popular lower-cost entry into an older rotary combine and is often used on modest acreages or as a second machine. Owners appreciate the accessible layout and the availability of aftermarket wear parts.
Why the Case IH 1660 stands out
The 1660 is notable because the Axial-Flow design handles many crops with fewer major threshing and separating components than a walker combine. Its reputation, active owner community, and generally good parts availability make it one of the most sought-after classic Case IH combines.
Buying a used Case IH 1660
Check rotor bars, concaves, transition cone, rotor cage, feeder chain and sprockets, gearbox drives, clean-grain elevator, auger flighting, belts, hydraulic leaks, and separator hours. Closely inspect the grain-tank supports and frame for cracks or sagging, especially on machines that carried extensions, and confirm exact engine and year-specific specifications with TractorData.com and manufacturer records.
Case IH 1660 frequently asked questions
How much horsepower does a Case IH 1660 have?
The 1660 is commonly cited at 190 hp, with either an IH DT-466 or later Cummins 8.3L diesel depending on year.
What is the Case IH 1660 grain tank capacity?
The commonly cited standard capacity is 180 bushels.
Are parts still available for a Case IH 1660?
Many service and wear parts remain available through Case IH dealers, aftermarket suppliers, and salvage networks.
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.