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International Harvester 706

International Harvester 706 tractor
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The International Harvester 706 is a standard-tread tractor produced from 1963 to 1967. It was available with a new Torque Amplifier design that prevented free-wheeling when going downhill. An over-center hand clutch was an option, usually found on Wheatland (standard tread) models. The 706 was available with either the Fast Hitch or a standard 3-point hitch. The PTO featured both 540 and 1000 RPM shafts, both of which turned while in use. Total production was 4,884 units, with an original price of $6,100 in 1967. Variants include the Farmall 706 (row-crop), IH 706 (standard-tread), IH 2706 (industrial), and 706 Hi-Clear (high-crop). Engine options included various 6-cylinder diesel and gasoline engines. The tractor featured 8-speed and 16-speed transmissions, including a Torque Amplifier option. Mechanical features include 2WD and optional 4WD, power steering, hydraulic disc brakes, and optional cab with A/C starting in 1966. Fuel capacity ranged from 33 to 39 gallons depending on fuel type, with a 17-gallon hydraulic system. Dimensions varied slightly between 2WD and 4WD models, with front and rear tire sizes specified. Electrical system used negative ground with generator or alternator charging options.
International Harvester 706IH 706tractor specificationsfarm tractordiesel enginegasoline enginetorque amplifier8-speed transmission16-speed transmissiontractor dimensionshydraulic system
Power80 hp[P]
Founded1963 - 1967
Model706

Technical Specifications

Detailed specifications and technical data for International Harvester 706

Power

PTO (tested):76.56 hp (57.1 kW)
Drawbar (tested):67.46 hp (50.3 kW)

Engine

Options:International Harvester 4.6L 6-cyl diesel, International Harvester 5.1L 6-cyl diesel, International Harvester 4.3L 6-cyl gasoline, Interntional Harvester 4.8L 6-cyl gasoline
C263 Oil capacity:9 qts (8.5 L)
D282 Oil capacity:9 qts (8.5 L)
Interntional Harvester C291:gasoline, 6-cylinder, liquid-cooled, Displacement 291 ci (4.8 L), Bore/Stroke 3.75x4.39 inches (95 x 112 mm), Compression 7.5:1, Rated RPM 2300, Note: The 291 was also available as an LP gas engine.
International Harvester C263:gasoline, 6-cylinder, liquid-cooled, Displacement 263 ci (4.3 L), Bore/Stroke 3.5625x4.3906 inches (90 x 112 mm), Rated RPM 2300, Coolant capacity 20.5 qts (gas) (19.4 L), 21 qts (LP gas) (19.9 L), Sparkplug gap 0.023 inches (gas) (0.584 mm), 0.015 inches (LP) (0.381 mm), Point gap 0.020 inches (0.508 mm), Intake valve clearance 0.027 inches (hot) (0.686 mm), Exhaust valve clearance 0.027 inches (hot) (0.686 mm), Note: The 263 was also available as an LP gas engine.
International Harvester D282:diesel, 6-cylinder, liquid-cooled, Displacement 282 ci (4.6 L), Bore/Stroke 3.6875x4.3906 inches (94 x 112 mm), Rated RPM 2300, Firing order 1-5-3-6-2-4, Coolant capacity 21.5 qts (20.3 L), Intake valve clearance 0.027 inches (hot) (0.686 mm), Exhaust valve clearance 0.027 inches (hot) (0.686 mm)
International Harvester D310:diesel, 6-cylinder, liquid-cooled, Displacement 310 ci (5.1 L), Bore/Stroke 3.875x4.375 inches (98 x 111 mm), Rated RPM 2300, Note: The 310 replaced the 282 diesel in November 1966, serial number 37237.

Capacity

Fuel:33 gal (gas/diesel) (124.9 L), 39 gal (LP gas) (147.6 L)
Hydraulic system:17 gal (64.3 L)

Variants

IH 706:standard-tread
IH 2706:industrial
Farmall 706:row-crop
706 Hi-Clear:high-crop

Electrical

Ground:negative
Batteries:1 (gas), 2 (diesel)
Battery volts:12 (gas), 6 (diesel)
Charging amps:25 (generator), 32 (alternator)

Hydraulics

Type:open center
Valves:1 or 2
Capacity:17 gal (64.3 L)
Pump flow:12 gpm (45.4 lpm), 17 gpm (optional) (64.3 lpm)
Total flow:24 gpm (90.8 lpm)
Steering flow:9 gpm (34.1 lpm)

Mechanical

Cab:Optional, A/C available starting in 1966
Drive:4x2 2WD, 4x4 MFWD 4WD (optional)
Brakes:Hydraulic disc brakes
Power steering:Yes

Production

Type:Standard-tread tractor
Notes:The 706 was available with a new Torque Amplifier design that prevented free-wheeling when going downhill. An over-center hand clutch was an option, usually found on Wheatland (standard tread) models. The 706 was available with either the Fast Hitch or a standard 3-point hitch. The PTO featured both 540 and 1000 RPM shafts, both of which turned while in use.
Total built:4,884
Original price:$6,100 in 1967
Years produced:1963 - 1967

Belt Pulley

RPM:1055
Speed:3,038 ft/min (925.98 meters/min)
Width:7.5 inches (19 cm)
Diameter:11 inches (27 cm)

Transmission

8-speed

Type:sliding gear
Gears:8 forward and 4 reverse
Notes:The 706 transmission is controlled by means of two levers. A range lever selects high, low, reverse range, or neutral. A separate speed lever selects one of four speeds. The tractor must be stopped, and the clutch used, to change range or speed gears.
Clutch:12-inch dry disc
Oil type:IH Hy-Tran
Oil capacity:68 qts (64.4 L)
Options:8-speed, 16-speed

Torque Amplifier

Type:Torque Amplifier
Gears:16 forward and 8 reverse
Notes:The Torque Amplifier (TA) provides a hydraulically-actuted under-drive that may be shifted, on the move, with any range and speed selection in the main transmission. Using the TA does not require the clutch or stopping the tractor. With the lever in the forward position, the TA is disengaged and the transmission is in direct drive. To slow the tractor (increasing pulling power) the TA lever should be pulled smoothly and quickly to the rear, engaging the TA. To disengage the TA and return to direct-drive, the TA should be moved forward, with a slight pause at the center position of the lever.
Clutch:12-inch dry disc
Oil type:IH Hy-Tran
Oil capacity:68 qts (64.4 L)

Tractor hitch

Type:IH Fast Hitch
Control:torsion bar (optional)
Rear Type:II/I

Serial Numbers

1963:501 (IH)
1964:1251 (IH)
1965:3478 (IH)
1966:4789 (IH)
1967:5316 (IH)
Serial Number Location:Tractor's clutch housing on left side

Dimensions & Tires

Width:80 inches (min) (203 cm), 103 inches (max) (261 cm)
Length:149 inches (2WD) (378 cm), 156 inches (4WD) (396 cm)
Weight:8100 to 9160 pounds
Rear tire:18.4-30
Wheelbase:87.5 inches (2WD) (222 cm), 87 inches (4WD) (220 cm)
Front tire:7.50-18 (2WD), 11.2-24 (4WD)

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540/1000

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