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International Harvester 1066

International Harvester 1066 tractor
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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.
International Harvester 1066IH 1066tractor specsfarm tractor66 Seriesdiesel enginepower shifthydrostaticrow-crop tractor
Power140 hp[P]
Founded1971 - 1976
Model1066

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

Type:hydrostatic
Gears:infinite forward and reverse (two-range)

Torque Amplifier

Type:two-speed power shift
Gears:16 forward and 8 reverse
Notes:Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).
Clutch:dry disc

Gear transmission

Type:gear
Gears:8 forward and 4 reverse
Notes:Four gears each in high, low, and reverse ranges.
Clutch:dry disc

Tractor hitch

Rear Type:III/II
Rear lift (at 24"/610mm):5600 lbs (2540 kg)

Serial Numbers

1971:7101
1972:12677
1973:24205
1974:34949
1975:46855
1976:56672

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540/1000

Related Models

International Harvester 1086

Model:1086

International Harvester Hydro 100

Model:Hydro 100

International Harvester 1466

Model:1466