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Axial flow

When Case IH introduces its 2003 combines at farm shows this fall, the first thing you’ll notice is that the combines are bigger. The first thing that the Case IH rep will tell you is that the axial-flow rotor that distinguishes a Case IH combine from other brands is getting its biggest overhaul since the technology came to market in 1977.

The combines. Case has discontinued its smallest Class IV 2344 combine because of lack of demand. The Class V and VI 2366 and 2388 will continue with more horsepower and throughput. And the radically new Class VII AFX7010 and AFX8010 will pump out 325 to 375 hp. The Class VIIs (the biggest might be called a Class VIII) will employ a first-of-its-kind continuously variable transmission (CVT) on the rotor and feeder systems.

The 2366 combines have 10 additional horsepower with a new Case IH air-to-air, intercooled engine for improved performance. But the engines run quieter because they have new mufflers. New air cleaners improve engine performance and simplify service.

Heavy-duty, non-powered guide axles with dual cylinders add strength for hillside and 12-row applications. A new cover for the thrust bearing on the Cross Flow fan improves bearing life by preventing material form entering the thrust bearing.

A new operator station with adjustable left-hand armrest has a redesigned seat and back cushions. From it you can use the updated Case IH Advanced Farming System (AFS) Universal Display to watch moisture and yield maps develop as the combine travels through the field. The new Case IH AFS100 WAAS receiver provides free satellite-based differential correction for submeter accuracy across North America.

New rotor. The new rotor, called the AFX, increases throughput in a Case IH 2388 axial-flow combine by up to 25%, while improving fuel efficiency and reducing wear. The secret? Terry Snack, a Case IH combine marketing specialist, says most of the improved performance comes from a new graduated pitch impeller that’s shaped more like a boat motor prop than a fan.

Performance improvements over the previous specialty rotor design can be seen most readily in tough harvesting conditions. In easy, dry harvesting conditions, improvements may be 2 to 8%. But green, wet or down crop situations can take the AFX advantage all the way up to 25%. Snack says graduated pitch inlet flights transition the crop from the feeder to the rotor cage. This design creates smoother, more consistent flow of material from the feeder to the threshing and separating areas.

Other new equipment that helps the AFX rotor do its job includes an upgraded rotor drive to help maintain constant rotor speed in varying crop conditions. The new drive has larger rotor drive pulleys, along with a spliceless rotor drive belt to improve the belt’s reliability and service life.

The rasp bar configuration also has been redesigned to provide more “grain-on-grain” threshing. The result is reduced wear and tear on threshing components, improved throughput, quieter operation and reduced horsepower requirements in tough harvesting conditions. “Farmers will notice less rotor rumble with the AFX,” Snack says. “Grain flows through in a more relaxed state so there’s less strain and less noise.”

Case plans to sell a kit that will allow the AFX rotor to be retrofitted into combines up to 10 years old, including models 1688, 2188 and 2388 axial-flow combines. A fully equipped dealer will be able to install the kit in about four hours. Price of the kit is not yet available, but Snack says the price of the AFX rotor itself will be about the same as the cost of the old specialty rotor. Contact Case IH, Dept. FIN, 700 State St., Racine, WI 53404, 262/636-6011, visit or

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