International Harvester 966 tractor specifications

1971 - 1976

1971 - 1976 66 SeriesRow-Crop tractor

Series:

Series:966 → Hydro 100986 ↓

1973 - 1976

66 Series

Row-Crop tractor

Series:

Series:	966 ←	Hydro 100	→ 1066
		Hydro 186 ↓

Production

Production
Manufacturer:	International Harvester
Type:	Row-Crop tractor
Original price:	$21,700 (1976)

International Harvester Hydro 100 Power

International Harvester Hydro 100 Power
Drawbar (claimed):	80 hp 59.7 kW
PTO (claimed):	104.17 hp 77.7 kW
Drawbar (tested):	78.31 hp 58.4 kW
PTO (tested):	104.17 hp 77.7 kW
power test details ...

International Harvester Hydro 100 Engine

International Harvester Hydro 100 Engine
International Harvester 7.1L 6-cyl diesel
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
Steering:	hydrostatic power
Brakes:	differential hydraulic dry disc
Cab:	Open operator station. Two-post ROPS and cab available.
Transmission:	hydrostatic
Transmission details ...

Hydraulics

Hydraulics
Pump flow:	12 gpm 45.4 lpm

Tractor hitch

Tractor hitch
Rear Type:	II

Power Take-off (PTO)

Power Take-off (PTO)
Rear RPM:	540/1000

Dimensions & Tires

Dimensions & Tires
Wheelbase:	104.8 inches 266 cm
Weight:	12,130 lbs 5502 kg
Front tire:	10.00-16
Rear tire:	18.4-34
Full dimensions and tires ...

Hydro 100 Serial Numbers

Hydro 100 Serial Numbers
Location:	Hydro drive housing, left side
1973:	7501
1974:	7727
1975:	10915
1976:	12434
how to read serial numbers...

Production

Production Manufacturer:International Harvester
Type:Row-Crop tractor
Total built:21,017
Original price:$18,000 (1976 )

Variants

Variants Hi-Clear:high-crop model

International Harvester 966 Power

International Harvester 966 Power Engine:91 hp
67.9 kW
Drawbar (claimed):84 hp
62.6 kW
PTO (claimed):95 hp
70.8 kW
Drawbar (tested):85.21 hp
63.5 kW
PTO (tested):100.80 hp
75.2 kW
power test details ...

1971 - 1976

66 Series

Row-Crop tractor

Series:

Series:	966	→ Hydro 100
	986 ↓

Nebraska Tractor Test 1082

Nebraska Tractor Test 1082
2400rpm diesel gear/TA 2WD October 5 - 19, 1971 Link: Nebraska Tractor Test 1082 file
PTO performance
Power at rated engine speed:	96.04 hp 71.6 kW
Fuel use:	6.5 gal/hour 24.6 l/hour
Power at rated PTO speed:	93.5 hp 69.7 kW
Fuel use:	5.9 gal/hour 22.3 l/hour
Drawbar performance
Max power:	80.4 hp 60.0 kW
Fuel use:	6.4 gal/hour 24.2 l/hour
Gear 1-Hi-TA used for power test.
Max pull:	10,041 lbs 4554 kg
Gear 3-Lo-TA used for pull test.

Nebraska Tractor Test 1095

Nebraska Tractor Test 1095
Diesel hydrostatic 2WD April 28 - May 12, 1972 Link: Nebraska Tractor Test 1095 file
PTO performance
Power at rated engine speed:	91.38 hp 68.1 kW
Fuel use:	7.2 gal/hour 27.3 l/hour
Power at rated PTO speed:	88.29 hp 65.8 kW
Fuel use:	6.4 gal/hour 24.2 l/hour
Drawbar performance
Max power:	68.08 hp 50.8 kW
Fuel use:	7.1 gal/hour 26.9 l/hour
Gear 5.4 MPH used for power test.
Max pull:	8,909 lbs 4041 kg
Gear 2.77 MPH used for pull test.

Nebraska Tractor Test 1123

Nebraska Tractor Test 1123
2600rpm diesel gear/TA 2WD April 20 - May 17, 1973 Link: Nebraska Tractor Test 1123 file
PTO performance
Power at rated engine speed:	100.80 hp 75.2 kW
Fuel use:	6.9 gal/hour 26.1 l/hour
Power at rated PTO speed:	101.52 hp 75.7 kW
Fuel use:	6.5 gal/hour 24.6 l/hour
Drawbar performance
Max power:	85.21 hp 63.5 kW
Fuel use:	6.9 gal/hour 26.1 l/hour
Gear 1-Hi-TA used for power test.
Max pull:	10,036 lbs 4552 kg
Gear 3-Lo-TA used for pull test.

International Harvester 966 Engine

International Harvester 966 Engine International Harvester 6.8L 6-cyl diesel Engine details ...

1971 - 1976

66 Series

Row-Crop tractor

Series:

Series:	966	→ Hydro 100
	986 ↓

Engine Detail

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

Mechanical

Mechanical Chassis:4x2 2WD
4x4 MFWD 4WD
Steering:power
Brakes:Independent hydraulic dry disc
Cab:Cab optional with heat and air-conditioning.
Transmissions:8-speed sliding gear
16-speed two-speed power shift
hydrostatic
Transmission details ...

1971 - 1976

66 Series

Row-Crop tractor

Series:

Series:	966	→ Hydro 100
	986 ↓

Transmissions overview

Transmissions overview
8-speed sliding gear
16-speed two-speed power shift
hydrostatic

Transmission

Transmission
Type:	sliding gear
Gears:	8 forward and 4 reverse
Oil capacity:	90 qts 85.2 L
Four gears each provided in high, low, and reverse ranges.

Speeds

Speeds
With 18.4-34 rear tires.

Transmission

Transmission
Transmission:	Torque Amplifier
Type:	two-speed power shift
Gears:	16 forward and 8 reverse
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.

Speeds

Speeds
With 18.4-34 rear tires.

Transmission

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

Speeds

Speeds

Capacity

Capacity Fuel:37 gal
140.0 L
Hydraulic system:22.5 gal
85.2 L

Hydraulics

Hydraulics Type:open center
Capacity:22.5 gal
85.2 L
Pressure:2000 psi
137.9 bar
Valves:1 to 4
Pump flow:12 gpm
45.4 lpm
Total flow:24 gpm
90.8 lpm
Steering flow:9 gpm
34.1 lpm
Steering press.:1550 psi
106.9 bar