International Harvester 1066

1971 - 1976

66 Series

Row-Crop tractor

Manufacturer

International Harvester

Row-Crop tractor

Built in Rock Island, Illinois, USA

Total built

54,947

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.

1066 Hi-Clear

high-crop

International Harvester 6.8L 6-cyl diesel

Fuel tank

42 gal 159.0 L

Drawbar (claimed)

108 hp 80.5 kW

PTO (claimed)

126 hp 94.0 kW

Drawbar (tested)

105.95 hp 79.0 kW

PTO (tested)

125.68 hp 93.7 kW

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.

Type

open center

Pump flow

12 gpm 45.4 lpm

Total flow

21 gpm 79.5 lpm

Steering flow

9 gpm 34.1 lpm

Rear Type

III/II

Rear lift (at 24"/610mm)

5600 lbs 2540 kg

Rear PTO

independent

Rear PTO Type

540/1000

Wheelbase

105 inches 266 cm

Weight

12148 to 13345 pounds

Front tire

11L-15

Rear tire

18.4-38

1066 Turbo Tractor published in 1971, by International Harvester

1066 Hydrostatic Tractor published in 1971, by International Harvester

766, 966, 1066 and 1466 Tractors published in 1972, by International Harvester

766, 966, 1066 and 1466 Tractors published in 1973, by International Harvester

Manufacturer

International Harvester DT414

Configuration

turbocharged diesel, 6-cylinder, liquid-cooled

Displacement

414 ci 6.8 L

Bore/Stroke

4.30x4.75 inches 109 x 121 mm

Air cleaner

dual stage dry

Rated RPM

2400

2600 (after 1973)

Starter volts

12

Oil capacity

18 qts 17.0 L

Coolant capacity

25 qts 23.7 L

8-speed gear

16-speed two-speed power shift

hydrostatic

Type

gear

Gears

8 forward and 4 reverse

Clutch

dry disc

Four gears each in high, low, and reverse ranges.

With 18.4-38 rear tires.

Transmission

Torque Amplifier

Type

two-speed power shift

Gears

16 forward and 8 reverse

Clutch

dry disc

Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).

With 18.4-38 rear tires.

Type

hydrostatic

Gears

infinite forward and reverse (two-range)

Ag front

11L-15

Ag rear

18.4-38

Wheelbase

105 inches 266 cm

Length

165 inches 419 cm

Width

98 inches 248 cm

Height (exhaust)

111 inches 281 cm

Clearance (drawbar)

16 inches 40 cm

Bar rear axle

3.25 inch diameter 82 mm

Operating

12,148 lbs (gear) 5510 kg

12,320 lbs (hydro) 5588 kg

13,345 lbs (duals) 6053 kg

Ballasted

15,260 lbs 6921 kg

NTTL 1081: diesel Torque Amplifier 2WD

NTTL 1083: diesel hydrostatic 2WD

NTTL 1124: diesel gear 2WD

Diesel Torque Amplifier 2WD October 1 - 21, 1971 Link: Nebraska Tractor Test 1081 file

PTO performance

Power at rated engine speed

116.23 hp 86.7 kW

Fuel use

7.7 gal/hour 29.1 l/hour

Power at rated PTO speed

112.18 hp 83.7 kW

Fuel use

6.8 gal/hour 25.7 l/hour

Drawbar performance

Max power

100.5 hp 74.9 kW

Fuel use

7.6 gal/hour 28.8 l/hour

Gear 1-Hi-TA used for power test.

Max pull

11625 lbs 5273 kg

Gear 3-Lo-TA used for pull test.

Diesel hydrostatic 2WD October 7 - 25, 1971 Link: Nebraska Tractor Test 1083 file

PTO performance

Power at rated engine speed

113.58 hp 84.7 kW

Fuel use

7.9 gal/hour 29.9 l/hour

Power at rated PTO speed

109.32 hp 81.5 kW

Fuel use

7.0 gal/hour 26.5 l/hour

Drawbar performance

Max power

84.88 hp 63.3 kW

Fuel use

8.0 gal/hour 30.3 l/hour

Gear 5.4 MPH used for power test.

Max pull

9576 lbs 4343 kg

Gear 3.1 MPH used for pull test.

Diesel gear 2WD April 17 - 27, 1973 Link: Nebraska Tractor Test 1124 file

PTO performance

Power at rated engine speed

125.68 hp 93.7 kW

Fuel use

8.4 gal/hour 31.8 l/hour

Power at rated PTO speed

119.2 hp 88.9 kW

Fuel use

7.3 gal/hour 27.6 l/hour

Drawbar performance

Max power

105.95 hp 79.0 kW

Fuel use

8.3 gal/hour 31.4 l/hour

Gear 1-Hi-TA used for power test.

Max pull

13000 lbs 5896 kg

Gear 2-Lo-Direct used for pull test.