666 by International Harvester

1972 - 1976

1972 - 1976

Production

Production Manufacturer:International Harvester
Total built:9,367
Original price:$11,875
Torque amplifier was an option. In 1973, the hydrostatic version of the 666 was renamed the 70 Hydro.

International Harvester 666 Power

International Harvester 666 Power Drawbar (tested):58.01 hp
43.3 kW
PTO (tested):69.61 hp
51.9 kW
power test details ...

1972 - 1976

1972 - 1976

Nebraska Tractor Test 1151

Nebraska Tractor Test 1151

Nebraska Tractor Test 1151

Nebraska Tractor Test 1151
312 diesel Torque Amplifier 2WD
November 3 - 14, 1973
Link: Nebraska Tractor Test 1151 file
PTO performance
Power at rated engine speed:66.29 hp
49.4 kW
Fuel use:4.7 gal/hour
17.8 l/hour
Drawbar performance
Max power:58.01 hp
43.3 kW
Fuel use:4.6 gal/hour
17.4 l/hour
Gear 3-Direct used for power test.
Max pull:8,012 lbs
3634 kg
Gear 2-TA used for pull test.

Nebraska Tractor Test 1152

Nebraska Tractor Test 1152

Nebraska Tractor Test 1152

Nebraska Tractor Test 1152
Gasoline Torque Amplifier 2WD
November 5 - December 3, 1973
Link: Nebraska Tractor Test 1152 file
PTO performance
Power at rated engine speed:66.30 hp
49.4 kW
Fuel use:12.0 gal/hour
45.4 l/hour
Drawbar performance
Max power:57.29 hp
42.7 kW
Fuel use:5.7 gal/hour
21.6 l/hour
Gear 3-Direct used for power test.
Max pull:7,981 lbs
3620 kg
Gear 2-TA used for pull test.

Nebraska Tractor Test 1154

Nebraska Tractor Test 1154

Nebraska Tractor Test 1154

Nebraska Tractor Test 1154
Gasoline hydrostatic 2WD
November 14 - December 3, 1973
Link: Nebraska Tractor Test 1154 file
PTO performance
Power at rated engine speed:69.61 hp
51.9 kW
Fuel use:6.9 gal/hour
26.1 l/hour
Power at rated PTO speed:64.10 hp
47.8 kW
Fuel use:5.8 gal/hour
22.0 l/hour
Drawbar performance
Max power:53.86 hp
40.2 kW
Fuel use:7.7 gal/hour
29.1 l/hour
Max pull:8,427 lbs
3822 kg

Nebraska Tractor Test 1155

Nebraska Tractor Test 1155

Nebraska Tractor Test 1155

Nebraska Tractor Test 1155
Diesel hydrostatic 2WD
November 14 - December 3, 1973
Link: Nebraska Tractor Test 1155 file
PTO performance
Power at rated engine speed:69.51 hp
51.8 kW
Fuel use:5.6 gal/hour
21.2 l/hour
Power at rated PTO speed:65.41 hp
48.8 kW
Fuel use:5.3 gal/hour
20.1 l/hour
Drawbar performance
Max power:53.10 hp
39.6 kW
Fuel use:5.6 gal/hour
21.2 l/hour
Max pull:8,310 lbs
3769 kg

International Harvester 666 Engines

International Harvester 666 Engines International Harvester 5.1L 6-cyl diesel International Harvester 4.8L 6-cyl gasoline Engine details ...

1972 - 1976

1972 - 1976

Engines overview

Engines overview
International Harvester 5.1L 6-cyl diesel
International Harvester 4.8L 6-cyl gasoline

Engine Detail

Engine Detail
International Harvester D312
diesel
6-cylinder
liquid-cooled
Displacement:312 ci
5.1 L
Bore/Stroke:3.875x4.410 inches
98 x 112 mm
Air cleaner:dual stage dry
Compression:17:1
Rated RPM:2000
Starter volts:12

Engine Detail

Engine Detail
International Harvester C291
gasoline
6-cylinder
liquid-cooled
Displacement:291 ci
4.8 L
Bore/Stroke:3.75x4.39 inches
95 x 112 mm
Air cleaner:dual stage dry
Compression:7.5:1
Rated RPM:2000
Starter volts:12

Mechanical

Mechanical Chassis:4x2 2WD
Steering:hydrostatic power
Brakes:dry disc
Cab:Open operator station. Two-post ROPS or canpoy optional.
Transmissions:5-speed
 hydrostatic
 10-speed partial power shift
Transmission details ...

1972 - 1976

1972 - 1976

Transmissions overview

Transmissions overview
5-speed
hydrostatic
10-speed partial power shift

Transmission

Transmission
Transmission:sliding gear
Gears:5 forward and 1 reverse

Transmission

Transmission
Type:hydrostatic
Gears:infinite forward and reverse

Transmission

Transmission
Transmission:Torque-Amplifier
Type:partial power shift
Gears:10 forward and 2 reverse
Clutch:dry disc

Speeds

Speeds

Tractor hitch

Tractor hitch Rear Type:II
Type:IH Fast Hitch

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Rear RPM:540

Dimensions & Tires

Dimensions & Tires Wheelbase:103 inches
261 cm
Weight:7053 lbs
3199 kg
Front tire:7.50-16
Rear tire:15.5-38
Full dimensions and tires ...

1972 - 1976

1972 - 1976

International Harvester 666 Tires

International Harvester 666 Tires
Ag front:7.50-16
Ag rear:15.5-38

Dimensions

Dimensions
Wheelbase:103 inches
261 cm
Weight:7053 lbs
3199 kg

666 Serial Numbers

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

how to read serial numbers...

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