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Model Information
1972-1976
The Farmall 666 was introduced in 1972, about a year after the others in the 66 series. It followed the 656 which was selling so well, that management didn’t want to interrupt production so they delayed the release of the 666. It was available in gasoline or diesel and featured a five-speed transmission with a torque amplifier. It came with most of the features offered on the larger 66 series tractor but this model was only available with a 540 rpm PTO.
Power Train & Specs
Engine: IH C291
Cylinders: 6
Bore & Stroke: 3.875x4.410
RPM: 2000
CID: 291
Fuel: Gasoline
Main Fuel Tank Cap:
Aux Fuel Tank Cap:
Carburetor:
Cooling Capacity:
Drawbar HP:
Belt PTO HP:
Weight: 7,260 lbs
Length: inches
Width: inches
Height: inches
Number of Gears: 5/1
Options:
Production & Serial Numbers
Total Produced: 9367
1972: 7500
1973: 8200
1974: 11585
1975: 13131
1976: 15739
Location: On the right side of the clutch housing
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