International Harvester

International Harvester 1066

The International Harvester 1066 is a row-crop tractor produced from 1971 to 1976 as part of the 66 Series. Built in Rock Island, Illinois, USA, a total of 54,947 units were made. It features a turbocharged 6-cylinder 6.8L diesel engine with a rated RPM of 2400 (2600 after 1973). Transmission options include an 8-speed gear, 16-speed two-speed power shift with Torque Amplifier, and hydrostatic drive. The tractor offers two- or four-wheel drive, power steering, hydraulic dry disc brakes, and an open operator station with optional cab and air-conditioning. The 1066 Hydro was later renamed the Hydro 100 due to power differences. It has a wheelbase of 105 inches, weighs between 12,148 and 13,345 lbs depending on configuration, and features independent rear PTO with 540/1000 RPM options.

Power140 hp[P]

Founded1971 - 1976

Model1066

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Technical Specifications

Detailed specifications and technical data for International Harvester 1066

Power

PTO (tested)	125.68 hp (93.7 kW)
PTO (claimed)	126 hp (94.0 kW)
Drawbar (tested)	105.95 hp (79.0 kW)
Drawbar (claimed)	108 hp (80.5 kW)

Tires

Rear tire	18.4-38
Front tire	11L-15

Engine

Type	turbocharged diesel
Model	International Harvester DT414
Cooling	liquid-cooled
Cylinders	6-cylinder
Fuel tank	42 gal (159.0 L)
Rated RPM	2400 (2600 after 1973)
Air cleaner	dual stage dry
Bore/Stroke	4.30x4.75 inches (109 x 121 mm)
Displacement	414 ci (6.8 L)
Oil capacity	18 qts (17.0 L)
Starter volts	12
Coolant capacity	25 qts (23.7 L)

Weight

Ballasted	15,260 lbs (6921 kg)
Operating (gear)	12,148 lbs (5510 kg)
Operating (duals)	13,345 lbs (6053 kg)
Operating (hydro)	12,320 lbs (5588 kg)

Variants

1066 Hi-Clear	high-crop

Dimensions

Width	98 inches (248 cm)
Length	165 inches (419 cm)
Wheelbase	105 inches (266 cm)
Bar rear axle	3.25 inch diameter (82 mm)
Height (exhaust)	111 inches (281 cm)
Clearance (drawbar)	16 inches (40 cm)

Hydraulics

Type	open center
Pump flow	12 gpm (45.4 lpm)
Total flow	21 gpm (79.5 lpm)
Steering flow	9 gpm (34.1 lpm)

Mechanical

Drive	Two- or four-wheel drive
Brakes	Hydraulic dry disc brakes
Steering	Power steering
Operator station	Open operator station. Two-post fixed ROPS available. Cab available with optional air-conditioning.

Production

Type	Row-Crop tractor
Notes	The hydrostatic drive 1066 Hydro was later renamed the Hydro 100. This was due to confusion over drawbar horsepower. The hydrostatic drive took a lot of power to operate, and the 1066 Hydro had much less power than a gear-driven 1066. Torque Amplifer (TA) was optional. The 1066 engine was altered in 1973 to increase horsepower.
Series	66 Series
Built in	Rock Island, Illinois, USA
Total built	54,947
Original price	$21,100 in 1976
Years produced	1971 - 1976

Transmission

Options	8-speed gear, 16-speed two-speed power shift, hydrostatic
Hydrostatic	Typehydrostatic Gearsinfinite forward and reverse (two-range)
Torque Amplifier	Typetwo-speed power shift Gears16 forward and 8 reverse NotesFour gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct). Clutchdry disc
Gear transmission	Typegear Gears8 forward and 4 reverse NotesFour gears each in high, low, and reverse ranges. Clutchdry disc