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Farmall 666

Farmall 666 tractor
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The Farmall 666 is a row-crop tractor produced from 1972 to 1976 by Farmall, a part of International Harvester. Built in Rock Island, Illinois, USA, a total of 9,367 units were made. It features engine options including a 5.1L 6-cylinder diesel and a 4.8L 6-cylinder gasoline engine, both producing 75 hp gross. Transmission options include 5-speed sliding gear, hydrostatic, and a 10-speed two-speed power shift. The tractor offers power steering, dry disc brakes, and an open operator station with optional ROPS, canopy, or cab with air-conditioning. It has a 12 gpm open center hydraulic system, IH Fast Hitch rear hitch, and an independent 540 rpm rear PTO. Dimensions include a 103-inch wheelbase, 161-inch length, and weights ranging from 6780 to 7420 pounds depending on configuration.
Farmall 666Farmall tractor666 tractor specsInternational Harvester 666row-crop tractor75 hp tractor5.1L diesel tractor4.8L gasoline tractor
Power75 hp
Founded1972 - 1976
Model666

Technical Specifications

Detailed specifications and technical data for Farmall 666

Power

PTO (tested):69.61 hp (51.9 kW)
PTO (claimed):65 hp (gear) (48.5 kW), 69 hp (hydro) (51.5 kW)
Engine (gross):75 hp (55.9 kW)
Drawbar (tested):58.01 hp (43.3 kW)
Drawbar (claimed):57 hp (gear) (42.5 kW), 54 hp (hydro) (40.3 kW)

Tires

Ag rear:15.5-38
Ag front:7.50-16

Engine

Rated RPM:2000
Air cleaner:dual stage dry
Bore/Stroke:3.875x4.410 inches (98 x 112 mm)
Compression:17:1
Fuel system:direct injection
Displacement:312 ci (5.1 L)
Gas Fuel tank:33 gal (124.9 L)
Power (gross):75 hp (55.9 kW)
Starter volts:12
Engine options:International Harvester 5.1L 6-cyl diesel, International Harvester 4.8L 6-cyl gasoline
Coolant capacity:21 qts (19.9 L)
Diesel Fuel tank:31 gal (117.3 L)
Rated RPM gasoline:2000
Air cleaner gasoline:dual stage dry
Bore/Stroke gasoline:3.75x4.39 inches (95 x 112 mm)
Compression gasoline:7.5:1
Displacement gasoline:291 ci (4.8 L)
Power (gross) gasoline:75 hp (55.9 kW)
Starter volts gasoline:12
Coolant capacity gasoline:21 qts (19.9 L)
International Harvester C291:gasoline, 6-cylinder, liquid-cooled
International Harvester D312:diesel, 6-cylinder, liquid-cooled

Dimensions

Width:87 inches (220 cm)
Length:161 inches (408 cm)
Wheelbase:103 inches (261 cm)
Rear tread:50 to 96 inches (127 to 243 cm)
Front tread:50 to 74 inches (127 to 187 cm), 56 to 80 inches (142 to 203 cm)
Shipping weight:6780 lbs (gas gear) (3075 kg), 7420 lbs (diesel hydro) (3365 kg)
Clearance (drawbar):14 inches (35 cm)
Clearance (front axle):21 inches (53 cm)
Height (steering wheel):77 inches (195 cm)

Electrical

Battery volts:12
Charging system:alternator

Hydraulics

Type:open center
Pump flow:12 gpm (45.4 lpm)

Mechanical

Drive:Two-wheel drive
Brakes:Dry disc brakes
Steering:Power steering
Operator station:Open operator station. Two-post ROPS or canopy optional. Cab available with air-conditioning.

Production

Type:Row-Crop tractor
Built in:Rock Island, Illinois, USA
Total built:9,367
Original price:$11,875
Years produced:1972 - 1976

Transmission

Clutch:dry disc
Hydrostatic:infinite forward and reverse
Sliding gear:5 forward and 1 reverse
Torque-Amplifier:two-speed power shift, 10 forward and 2 reverse
Transmission options:5-speed, hydrostatic, 10-speed two-speed power shift

Tractor hitch

Type:IH Fast Hitch
Rear Type:II

Serial Numbers

1972:7500
1973:8200
1974:11585
1975:13131
1976:15739
Location:Clutch housing, right side

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540 (1.375)