The second generation of Axial-Flow combines was introduced in the fall of 1985. The structure remained largely unchanged, with updates focusing on details. The chaffer sieves were expanded, and the grain elevator and cleaning shoe were enlarged. The cutter bars were updated from the 800 series to the 1000 series, and the return to the operator was now standard. The speed of the unloading auger automatically adjusted according to the driving speed. The cabin noise level was reported to be 79 dB. The power of the 1680 model increased to 225 horsepower thanks to the intercooler. The engines of the 1640 and 1660 models also grew to 7.6 liters, with power outputs of 150 and 180 hp respectively. The American market still offered the 1620 model with 124 horsepower. In 1989, IH engines were replaced by Cummins engines, and power outputs increased from previous levels.

In 1993, updated models 1644/1664/1684 were introduced in the USA. Engine powers increased to 180/215/260 horsepower despite a drop in engine speed. Power also increased in Europe, but model numbers remained the same. By this stage, approximately 60,000 Axial-Flow combines had been manufactured.

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