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TractorSpex

Tractor data for over 20,000 different models.

Home > Farmall > 1066

Farmall 1066

Engine:

Farmall Standard

Power:

140 HP (Engine) / HP (PTO)

Fuel Type:

Diesel

Production:

1971 - 1976

Detailed Specifications

Overview


Overview
Summary	x66 Series Row-Crop tractor


Production
Manufacturer	Farmall (a part of International Harvester)
Summary	Row-Crop tractor / Built in Rock Island, Illinois, USA
Total built	54,947
Summary	Original price was $21,100 in 1976


Mechanical
Summary	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 gpm 45.4 lpm
Total flow	21 gpm 79.5 lpm
Steering flow	9 gpm 34.1 lpm


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

Engine Specifications


Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing.


Engine Detail
Summary	International Harvester DT414 / 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

Transmission & PTO


Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing.


Transmission options
Summary	8-speed gear / 16-speed two-speed power shift / hydrostatic


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


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


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

Dimensions & Weight


Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing.


Farmall 1066 Tires
Ag front	11L-15
Ag rear	18.4-38


Dimensions
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


Farmall 1066 Weight
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

Performance Tests


Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing.


Tractor Tests
Summary	NTTL 1081: diesel Torque Amplifier 2WD / NTTL 1083: diesel hydrostatic 2WD / NTTL 1124: diesel gear 2WD


Nebraska Tractor Test 1081
Summary	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
Summary	Drawbar performance
Max power	100.5 hp 74.9 kW
Fuel use	7.6 gal/hour 28.8 l/hour
Summary	Gear 1-Hi-TA used for power test.
Max pull	11625 lbs 5273 kg
Summary	Gear 3-Lo-TA used for pull test.


Nebraska Tractor Test 1083
Summary	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
Summary	Drawbar performance
Max power	84.88 hp 63.3 kW
Fuel use	8.0 gal/hour 30.3 l/hour
Summary	Gear 5.4 MPH used for power test.
Max pull	9576 lbs 4343 kg
Summary	Gear 3.1 MPH used for pull test.


Nebraska Tractor Test 1124
Summary	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
Summary	Drawbar performance
Max power	105.95 hp 79.0 kW
Fuel use	8.3 gal/hour 31.4 l/hour
Summary	Gear 1-Hi-TA used for power test.
Max pull	13000 lbs 5896 kg
Summary	Gear 2-Lo-Direct used for pull test.

Last Database Update: 12/8/2025