Farmall 1066
The Farmall 1066 is a tractor produced by Farmall. It is equipped with a 414 ci 6.8 L engine. The listed engine power is 125.68 hp 93.7 kW. Transmission: Torque Amplifier. Operating weight: 12148 to 13345 pounds.
Engine Power
125.68 hp
93.7 kW
Fuel & Capacities
42 gal
159.0 L
Transmission
Torque Amplifier
Operating Weight
12148 to 13345 pounds
Overview
 | 66 SeriesRow-Crop tractor |
|---|---|
66 Series | |
Row-Crop tractor | |
Series map: Hydro 10010661468115.7hp*140.0hp*147.8hp**Estimated engine power for comparison only.
Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing. |
Production | |
|---|---|
Manufacturer | Farmall (a part of International Harvester) |
Row-Crop tractor | |
Built in Rock Island, Illinois, USA | |
Total built | 54,947 |
Original price was $21,100 in 1976 | |
Farmall 1066 Engine | |
|---|---|
International Harvester 6.8L 6-cyl diesel | |
Fuel tank | 42 gal
159.0 L |
Engine details ...  | |
Farmall 1066 Power | |
|---|---|
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 |
Performance test details ...  | |
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 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 |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540/1000 |
Dimensions & Tires | |
|---|---|
Wheelbase | 105 inches
266 cm |
Weight | 12148 to 13345 pounds |
Front tire | 11L-15 |
Rear tire | 18.4-38 |
Full dimensions and tires ...  | |
Engine
Series map: Hydro 10010661468115.7hp*140.0hp*147.8hp**Estimated engine power for comparison only.
Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing. |
Engine Detail — 414 ci / 6.8 L Diesel
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 |
Transmission
Series map: Hydro 10010661468115.7hp*140.0hp*147.8hp**Estimated engine power for comparison only.
Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing. |
Transmission options | |
|---|---|
8-speed gear | |
16-speed two-speed power shift | |
hydrostatic |
Transmission — 8 forward and 4 reverse gear
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
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. | |
 | |
Transmission — infinite forward and reverse (two-range) hydrostatic
Type | hydrostatic |
Gears | infinite forward and reverse (two-range) |
 | |
Dimensions
Series map: Hydro 10010661468115.7hp*140.0hp*147.8hp**Estimated engine power for comparison only.
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 |
Tests
Series map: Hydro 10010661468115.7hp*140.0hp*147.8hp**Estimated engine power for comparison only.
Note: the Farmall model 1066 is the same as the International Harvester 1066. The following data is from the 1066 listing. |
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 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. | |
Nebraska Tractor Test 1083 | |
|---|---|
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. | |
Nebraska Tractor Test 1124 | |
|---|---|
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. | |
Photos
Farmall 1066, left view
Farmall 1066, right-front view
Farmall 1066, rear view
Farmall 1066 Hi-Clear tractor
Farmall 1066
Recommended Implements & Sizing Guide
Engineering recommendations for Farmall 1066 based on its 125.68 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 4 to 5 Bottom (16-18")4 - 5 铧 (40-45 cm) | Heavy Duty | Heavy primary tillage; semi-mounted hitch recommended. |
Rotary Cutter / MowerMowing & Clearing | 10 to 12 ft Flex-Wing3.0 - 3.6 m 折叠双翼 | Heavy Duty | Wide swath pasture and crop residue shredding. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙 | Commercial / Field Scale | Wide commercial field leveling; requires hydraulic remotes. |
Hay BalerHay & Forage | 5x6 Round Baler or 3x3 Mid Square1.5x1.8 m 大圆捆或中型方捆机 | Heavy Duty | High density baling; requires minimum 85 PTO HP. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Farmall 1066.
Estimated Continuous Field Runtime: 6.4 hrs
Approximately 6.4 hours of continuous field operation at ~75% rated power on a full tank (42 gal / 159 L).
Estimated 75% Load Fuel Burn~6.5 gal/hr (24.7 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Farmall 1066 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Farmall 1066.
Converted Equivalents:
Horsepower (HP)125.7 hp
Kilowatts (kW)93.7 kW
Metric Horsepower (PS / CV)127.4 PS
Direct Competitor Comparison
Compare Farmall 1066 against same-era industry alternatives in the same horsepower class.
Current Model
Farmall
Farmall 1066
Engine Power:125.68 hp
93.7 kW
★ Baseline Reference
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