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Years in Production / 1971–1976
International Harvester
1066
Explore the specifications, hardware, and original references for the International Harvester 1066.
140hp
Engine estimate · from PTO
MFWD Optional
Drive
1971–1976
Production years
International Harvester
Manufacturer
1066 / 01
At a glance
Overview
1971 - 1976
66 Series
Row-Crop tractor
Production
Row-Crop tractor
Built in Rock Island, Illinois, USA
Original price was $21,100 in 1976
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.
- Manufacturer
- International Harvester
- Total Built
- 54,947
Mechanical
Two- or four-wheel drive
Power steering
Hydraulic dry disc brakes
Open operator station. Two-post fixed ROPS available. Cab available with optional air-conditioning.
Hydraulics
- Type
- open center
- Pump Flow
- 12 gpm45.4 lpm
- Total Flow
- 21 gpm79.5 lpm
- Steering Flow
- 9 gpm34.1 lpm
Hitch
- Rear Type
- III/II
- Rear Lift At24610mm
- 5600 lbs2540 kg
Pto
- Rear Pto
- independent
- Rear Type
- 540/1000
Serial Numbers
FAQ: How to read a serial number table.
- 1971
- 7101
- 1972
- 12677
- 1973
- 24205
- 1974
- 34949
- 1975
- 46855
- 1976
- 56672
1066 / 02
Under the hood
Engine Detail
International Harvester DT414
turbocharged diesel
6-cylinder
liquid-cooled
- Displacement
- 414 ci6.8 L
- Bore Stroke
- 4.30x4.75 inches109 x 121 mm
- Air Cleaner
- dual stage dry
- Rated Rpm
- 2400
- Rated Rpm
- 2600 (after 1973)
- Starter Volts
- 12
- Oil Capacity
- 18 qts17.0 L
- Coolant Capacity
- 25 qts23.7 L
- Cylinders
- 6
- Cooling
- liquid-cooled
Engine Options
International Harvester 6.8L 6-cyl diesel
- Fuel Tank
- 42 gal159.0 L
1066 / 03
Gears & controls
Transmission (Option 1)
Four gears each in high, low, and reverse ranges.
- Transmission Type
- gear
- Gears
- 8 forward and 4 reverse
- Clutch
- dry disc
- Speeds Description
- With 18.4-38 rear tires.
Transmission (Option 2)
Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).
- Transmission
- Torque Amplifier
- Transmission Type
- two-speed power shift
- Gears
- 16 forward and 8 reverse
- Clutch
- dry disc
- Speeds Description
- With 18.4-38 rear tires.
Transmission (Option 3)
- Transmission Type
- hydrostatic
- Gears
- infinite forward and reverse (two-range)
Transmission Options
8-speed gear
16-speed two-speed power shift
hydrostatic
1066 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 165 in419 cm
- Width
- 98 in248 cm
- Height
- 111 in281 cm
- Wheelbase
- 105 in266 cm
Dimensions And Tires
- Wheelbase
- 105 inches266 cm
- Weight
- 12148 to 13345 pounds
- Front Tire
- 11L-15
- Rear Tire
- 18.4-38
Serial Number Location
Serial number plate on the left side of the tractor's clutch housing.
Tires And Tracks
- Front Ag
- 11L-15
- Rear Ag
- 18.4-38
1066 / 05
Tractor Photos
See it in action
Videos
Watch International Harvester 1066 videos from their original YouTube creators.
1066 / 07
Tests (NTTL)
Tractor Tests
NTTL 1081: diesel Torque Amplifier 2WD
NTTL 1083: diesel hydrostatic 2WD
NTTL 1124: diesel gear 2WD
Nebraska Tractor Test 1081
Diesel Torque Amplifier 2WDOctober 1 - 21, 1971
PTO performance
Drawbar performance
Gear 1-Hi-TA used for power test.
Gear 3-Lo-TA used for pull test.
- Id
- 1081
- Power At Rated Engine Speed
- 116.23 hp86.7 kW
- Fuel Use
- 7.7 gal/hour29.1 l/hour
- Fuel Use
- 6.8 gal/hour25.7 l/hour
- Fuel Use
- 7.6 gal/hour28.8 l/hour
- Power At Rated Pto Speed
- 112.18 hp83.7 kW
- Max Power
- 100.5 hp74.9 kW
- Max Pull
- 11625 lbs5273 kg
Nebraska Tractor Test 1083
Diesel hydrostatic 2WDOctober 7 - 25, 1971
PTO performance
Drawbar performance
Gear 5.4 MPH used for power test.
Gear 3.1 MPH used for pull test.
- Id
- 1083
- Power At Rated Engine Speed
- 113.58 hp84.7 kW
- Fuel Use
- 7.9 gal/hour29.9 l/hour
- Fuel Use
- 7.0 gal/hour26.5 l/hour
- Fuel Use
- 8.0 gal/hour30.3 l/hour
- Power At Rated Pto Speed
- 109.32 hp81.5 kW
- Max Power
- 84.88 hp63.3 kW
- Max Pull
- 9576 lbs4343 kg
Nebraska Tractor Test 1124
Diesel gear 2WDApril 17 - 27, 1973
PTO performance
Drawbar performance
Gear 1-Hi-TA used for power test.
Gear 2-Lo-Direct used for pull test.
- Id
- 1124
- Power At Rated Engine Speed
- 125.68 hp93.7 kW
- Fuel Use
- 8.4 gal/hour31.8 l/hour
- Fuel Use
- 7.3 gal/hour27.6 l/hour
- Fuel Use
- 8.3 gal/hour31.4 l/hour
- Power At Rated Pto Speed
- 119.2 hp88.9 kW
- Max Power
- 105.95 hp79.0 kW
- Max Pull
- 13000 lbs5896 kg