New Holland introduced the world’s first twin‐rotor combine, the TR 70 (TR = Twin Rotor), in 1975. In it, two longitudinal rotors replaced the traditional threshing drum and concaves. For 1985 the lineup was updated for the second time, and the model designations became TR 76, TR 86, and TR 96. In the TR series, the main market—the USA—favored the 10.4-liter Caterpillar V8 engines. Only the largest model’s 240-horsepower engine was turbocharged.

The most significant changes in the new models were a larger, more comfortable cab, newly shaped S3 rotors, and an expanded sieving area. On the TR 86, the hydrostatic drive train became standard. The combines’ base equipment was fairly minimal, but the range of optional extras was extensive. Optional features included, among other things, a tilting header and an automatically adjusted elevator‐speed control that synced with driving speed. Production of the smallest model, the TR 76, ended in 1987. Later TR 86 and TR 96 models switched to Ford engines (188 and 240 hp).

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