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International Harvester 966

International Harvester 966 tractor
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The International Harvester 966 is a row-crop tractor produced from 1971 to 1976 as part of the 66 Series. It was built in Rock Island, Illinois, USA, with a total production of 21,017 units. The tractor features a 6.8L 6-cylinder diesel engine producing 91 hp, with options for 8-speed gear, 16-speed two-speed power shift, and hydrostatic transmissions. It offers two- or four-wheel drive, power steering, and optional cab with heat and air-conditioning. The 966 has a wheelbase of 105 inches, weighs between 11,116 and 11,700 pounds depending on transmission, and uses 9.5L-15 front and 18.4-34 rear tires. It includes an IH Fast Hitch and independent rear PTO with 540/1000 rpm options.
International Harvester 966IH 966tractor specsrow-crop tractor66 Series6.8L diesel engine91 hp tractorfarm tractor
Power91 hp
Founded1971 - 1976
Model966

Technical Specifications

Detailed specifications and technical data for International Harvester 966

Power

Engine:91 hp (67.9 kW)
PTO (tested):100.80 hp (75.2 kW)
PTO (claimed):95 hp (70.8 kW)
Drawbar (tested):85.21 hp (63.5 kW)
Drawbar (claimed):84 hp (62.6 kW)

Tires

Rear tire:18.4-34
Front tire:9.5L-15

Engine

Type:diesel
Model:International Harvester D414
Power:91 hp (67.9 kW)
Cooling:liquid-cooled
Cylinders:6-cylinder
Rated RPM:2400 (early), 2600 (late)
Air cleaner:dual dry elements
Bore/Stroke:4.30x4.75 inches (109 x 121 mm)
Displacement:414 ci (6.8 L)
Firing order:1-5-3-6-2-4
Oil capacity:12 qts (11.4 L)
Coolant capacity:24 qts (22.7 L)

Weight

Ballasted:13,500 lbs (6123 kg)
Operating:11,116 lbs (gear) (5042 kg), 11,700 lbs (hydro) (5307 kg)

Capacity

Fuel:37 gal (140.0 L)
Hydraulic system:22.5 gal (85.2 L)

Variants

Hi-Clear:high-crop model

Dimensions

Width:98 inches (248 cm)
Length:165 inches (419 cm)
Wheelbase:105 inches (266 cm)
Ground clearance:14 inches (35 cm)
Height (exhaust):105 inches (266 cm)

Electrical

Batteries:2
Battery AH:172
Battery volts:6
Charging amps:32

Hydraulics

Type:open center
Valves:1 to 4
Capacity:22.5 gal (85.2 L)
Pressure:2000 psi (137.9 bar)
Pump flow:12 gpm (45.4 lpm)
Total flow:21 gpm (79.5 lpm)
Steering flow:9 gpm (34.1 lpm)
Steering pressure:1550 psi (106.9 bar)

Mechanical

Cab:optional with heat and air-conditioning
Drive:Two- or four-wheel drive
Brakes:Independent hydraulic dry disc brakes
Power steering:Yes

Production

Type:Row-Crop tractor
Series:66 Series
Built in:Rock Island, Illinois, USA
Total built:21,017
Original price:$18,000 in 1976
Years produced:1971 - 1976

Transmission

Options:8-speed gear, 16-speed two-speed power shift, hydrostatic

Hydrostatic

Type:hydrostatic
Gears:infinite forward and reverse
Notes:The hydrostatic transmission option ended in 1973 when the Hydro 100 began production.

Torque Amplifier

Type:two-speed power shift
Gears:16 forward and 8 reverse
Notes:The Torque Amplifier (TA) provides a shift-on-the-move underdrive to the standard transmission. In any gear and range, the transmission can be shifted from direct drive (DD) to the slower TA speed by simply pulling the TA lever back. No clutching or stopping is needed.
Clutch:dry disc

Gear transmission

Type:gear
Gears:8 forward and 4 reverse
Notes:Four gears each provided in high, low, and reverse ranges.
Clutch:dry disc
Oil capacity:90 qts (85.2 L)

Tractor hitch

Type:IH Fast Hitch
Rear Type:II
Rear lift:5000 lbs (at 24 inches) (2268 kg)
Rear lift (at 24"/610mm):4400 lbs (1995 kg)

Serial Numbers

1971:7101
1972:11815
1973:17794
1974:22526
1975:28119
1976:31772
Location:Clutch housing, left side

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540/1000

Related Models

International Harvester 986

Model:986

International Harvester Hydro 100

Model:Hydro 100