International Harvester 706

The International Harvester 706 is a tractor produced by International Harvester. It is equipped with a 291 ci 4.8 L engine. The listed engine power is 76.56 hp 57.1 kW. Transmission: Torque Amplifier. Drive type: 4x2 2WD. Operating weight: 8100 to 9160 pounds.

Engine Power

76.56 hp 57.1 kW

Drive & Traction

4x2 2WD

Fuel & Capacities

33 gal (gas/diesel) 124.9 L

Transmission

Torque Amplifier

Operating Weight

8100 to 9160 pounds

Overview

	1963 - 1967 Standard-tread tractor

Production
Manufacturer	International Harvester
Standard-tread tractor
Total built	4,884
Original price was $6,100 in 1967
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.

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

International Harvester 706 Power
Drawbar (tested)	67.46 hp 50.3 kW
PTO (tested)	76.56 hp 57.1 kW
Performance test details ...

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

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

Hydraulics
Type	open center
Capacity	17 gal 64.3 L
Valves	1 or 2
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

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

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000

Dimensions & Tires
Wheelbase	87.5 inches (2WD) 222 cm
	87 inches (4WD) 220 cm
Weight	8100 to 9160 pounds
Front tire	7.50-18
Rear tire	18.4-30
Full dimensions and tires ...

Belt Pulley
Diameter	11 inches 27 cm
Width	7.5 inches 19 cm
RPM	1055
Speed	3,038 ft/min 925.98 meters/min

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

References

706-806 Tractors published by International Harvester
Operator's Manual McCormick Farmall and International 706 Tractors (1014498R3) published in 1965

Engine

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

Engine Detail — 282 ci / 4.6 L Diesel

Manufacturer	International Harvester D282
Fuel Type	Diesel
Configuration	6-cylinder, liquid-cooled
The 282 was the original diesel available for the 706. It was later replaced by the German-built 310 diesel.
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
Oil capacity	9 qts 8.5 L

Engine Detail — 310 ci / 5.1 L Diesel

Manufacturer	International Harvester D310
Fuel Type	Diesel
Configuration	6-cylinder, liquid-cooled
The 310 replaced the 282 diesel in November 1966, serial number 37237.
Displacement	310 ci 5.1 L
Bore/Stroke	3.875x4.375 inches 98 x 111 mm
Rated RPM	2300

Engine Detail — 263 ci / 4.3 L Gasoline

Manufacturer	International Harvester C263
Fuel Type	Gasoline
Configuration	6-cylinder, liquid-cooled
The 263 was also available as an LP gas engine.
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
Oil capacity	9 qts 8.5 L

Engine Detail — 291 ci / 4.8 L Gasoline

Manufacturer	Interntional Harvester C291
Fuel Type	Gasoline
Configuration	6-cylinder, liquid-cooled
The 291 was also available as an LP gas engine.
Displacement	291 ci 4.8 L
Bore/Stroke	3.75x4.39 inches 95 x 112 mm
Compression	7.5:1
Rated RPM	2300

Transmission

Transmission options
8-speed
16-speed

Transmission — sliding gear

Transmission	sliding gear
Gears	8 forward and 4 reverse
Clutch	12-inch dry disc
Oil capacity	68 qts 64.4 L
Oil type	IH Hy-Tran
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.
With 18.4-30 rear tires.

	IH Hy-Tran

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Gears	16 forward and 8 reverse
Clutch	12-inch dry disc
Oil capacity	68 qts 64.4 L
Oil type	IH Hy-Tran
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.
With 18.4-30 rear tires.

	IH Hy-Tran

Dimensions

International Harvester 706 Tires
Ag front	7.50-18 (2WD)
	11.2-24 (4WD)
Ag rear	18.4-30

Dimensions
Wheelbase	87.5 inches (2WD) 222 cm
	87 inches (4WD) 220 cm
Length	149 inches (2WD) 378 cm
	156 inches (4WD) 396 cm
Width	80 inches (min) 203 cm
	103 inches (max) 261 cm
Height (steering wheel)	80 inches (2WD) 203 cm
	80.5 inches (4WD) 204 cm
Clearance (front axle)	13 inches (4WD) 33 cm
	17 inches (2WD) 43 cm
Clearance (drawbar)	12 inches 30 cm
Rear axle	3.25 inch diameter 82 mm
Front tread	53 inches 134 cm (fixed)
Front tread	56/69/80 inches 142/175/203 cm (adjustable)
Rear tread	60 to 84 inches 152 to 213 cm

International Harvester 706 Weight
Shipping	8,100 lbs (gas) 3674 kg
	8,360 lbs (diesel) 3792 kg
Operating	8,285 lbs (263 gas) 3758 kg
	8,530 lbs (282 diesel) 3869 kg
	8,700 lbs (291 gas) 3946 kg
	9,160 lbs (310 diesel) 4154 kg
Ballasted	10,710 lbs 4858 kg

Tests

Tractor Tests
NTTL 856: 282 diesel Torque Amplifier 2WD
NTTL 858: 263 gasoline Torque Amplifier 2WD
NTTL 955: 310 diesel Torque Amplifier 2WD
NTTL 956: 291 LP gas Torque Amplifier 2WD
NTTL 957: 291 gas Torque Amplifier 2WD

Nebraska Tractor Test 856
282 diesel Torque Amplifier 2WD October 21 - November 8, 1963 Link: Nebraska Tractor Test 856 file
PTO performance
Power at rated engine speed	72.42 hp 54.0 kW
Fuel use	5.5 gal/hour 20.8 l/hour
Power at rated PTO speed	67.26 hp 50.2 kW
Fuel use	5.1 gal/hour 19.3 l/hour
Drawbar performance
Max power	65.12 hp 48.6 kW
Fuel use	5.4 gal/hour 20.4 l/hour
Gear 2-High-TA used for power test.
Max pull	8,026 lbs 3640 kg
Gear 3-Low-TA used for pull test.

Nebraska Tractor Test 858
263 gasoline Torque Amplifier 2WD October 30 - November 20, 1963 Link: Nebraska Tractor Test 858 file
PTO performance
Power at rated engine speed	73.82 hp 55.0 kW
Fuel use	5.7 gal/hour 21.6 l/hour
Power at rated PTO speed	68.77 hp 51.3 kW
Fuel use	5.2 gal/hour 19.7 l/hour
Drawbar performance
Max power	66.18 hp 49.4 kW
Fuel use	5.9 gal/hour 22.3 l/hour
Gear 2-High-TA used for power test.
Max pull	7,976 lbs 3617 kg
Gear 3-Low-TA used for pull test.

Nebraska Tractor Test 955
310 diesel Torque Amplifier 2WD November 14 - 28, 1966 Link: Nebraska Tractor Test 955 file
PTO performance
Power at rated engine speed	76.09 hp 56.7 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Power at rated PTO speed	71.84 hp 53.6 kW
Fuel use	4.7 gal/hour 17.8 l/hour
Drawbar performance
Max power	67.46 hp 50.3 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Gear 1-High-Direct used for power test.
Max pull	8,416 lbs 3817 kg
Gear 3-Low-TA used for pull test.

Nebraska Tractor Test 956
291 LP gas Torque Amplifier 2WD November 14 - 28, 1966 Link: Nebraska Tractor Test 956 file
PTO performance
Power at rated engine speed	76.3 hp 56.9 kW
Fuel use	8.4 gal/hour 31.8 l/hour
Power at rated PTO speed	70.98 hp 52.9 kW
Fuel use	7.6 gal/hour 28.8 l/hour
Drawbar performance
Max power	66.53 hp 49.6 kW
Fuel use	8.3 gal/hour 31.4 l/hour
Gear 1-High-Direct used for power test.
Max pull	8,387 lbs 3804 kg
Gear 3-Lo-TA used for pull test.

Nebraska Tractor Test 957
291 gas Torque Amplifier 2WD November 16 - 28, 1966 Link: Nebraska Tractor Test 957 file
PTO performance
Power at rated engine speed	76.56 hp 57.1 kW
Fuel use	6.3 gal/hour 23.8 l/hour
Power at rated PTO speed	71.8 hp 53.5 kW
Fuel use	5.8 gal/hour 22.0 l/hour
Drawbar performance
Max power	65.67 hp 49.0 kW
Fuel use	6.3 gal/hour 23.8 l/hour
Gear 1-High-DD used for power test.
Max pull	8,387 lbs 3804 kg
Gear 3-Low-TA used for pull test.

Photos

International Harvester 706

Recommended Implements & Sizing Guide

Engineering recommendations for International Harvester 706 based on its 76.56 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	3 to 4 Bottom (16")3 - 4 铧 (40 cm)	Heavy Duty	Suitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing	7 to 8 ft (84-96 in)2.1 - 2.4 m	Heavy Duty	Heavy-duty twin spindle cutter for overgrown acreage.
Rotary TillerSeedbed Prep	78 to 84 in200 - 215 cm	Heavy Duty	Heavy commercial tiller with multi-speed gearbox.
Disc HarrowSecondary Tillage	10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙	Heavy Duty	Aggressive residue cutting in corn/cotton stubble.
Hay BalerHay & Forage	4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机	Heavy Duty	Silage and dry hay; 540 RPM PTO with slip-clutch.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester 706.

Estimated Continuous Field Runtime: 8.3 hrs

Approximately 8.3 hours of continuous field operation at ~75% rated power on a full tank (33 gal / 124.9 L).

Estimated 75% Load Fuel Burn~4 gal/hr (15.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours