International Harvester

International Harvester 660

The International Harvester 660 is a standard-tread farm tractor produced from 1959 to 1963. It features multiple engine options including gasoline, diesel, and LP gas 6-cylinder engines, all rated at 95 hp. The tractor offers 5-speed and 10-speed transmissions with a Torque Amplifier option for clutchless shifting. It has a wheelbase of 85.5 inches and weighs between 9,635 and 9,875 pounds depending on the engine type. The 660 supports a rear independent 540 PTO and has hydraulic flow options up to 17 gpm. It was built in a total of 6,945 units and originally sold for around $6,000 in 1963. Attachments include the Wagner 625 front-end loader with a 4000 lbs lift capacity.

Power95 hp

Founded1959 - 1963

Model660

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Technical Specifications

Detailed specifications and technical data for International Harvester 660

Power

Plows	6
Engine power	95 hp (70.8 kW)
PTO (tested)	81.39 hp (60.7 kW)
Drawbar (tested)	70.21 hp (52.4 kW)

Engine

Power	95 hp (70.8 kW)
Torque	219 lb-ft (297.0 Nm)
Fuel tank	33 gal (gas/diesel) (124.9 L), 37.5 gal (LP gas) (141.9 L)
Rated RPM	2400
Torque RPM	1300
Air cleaner	oil bath
Bore/Stroke	3.5625x4.3906 inches (90 x 112 mm)
Compression	7.2:1
Displacement	263 ci (4.3 L)
Oil capacity	9 qts (8.5 L)
Power LP gas	95 hp (70.8 kW)
Power diesel	95 hp (70.8 kW)
Torque LP gas	212 lb-ft (287.5 Nm)
Torque diesel	219 lb-ft (297.0 Nm)
Engine options	International Harvester 4.3L 6-cyl gasoline, International Harvester 4.6L 6-cyl diesel, International Harvester 4.3L 6-cyl LP gas
Coolant capacity	20 qts (18.9 L)
Rated RPM LP gas	2400
Rated RPM diesel	2400
Torque RPM LP gas	1200
Torque RPM diesel	1800
Air cleaner LP gas	oil bath
Air cleaner diesel	oil bath
Bore/Stroke LP gas	3.5625x4.3906 inches (90 x 112 mm)
Bore/Stroke diesel	3.6875x4.3906 inches (94 x 112 mm)
Compression LP gas	8.75:1
Compression diesel	18.2:1
Displacement LP gas	263 ci (4.3 L)
Displacement diesel	282 ci (4.6 L)
Firing order diesel	1-5-3-6-2-4
Oil capacity LP gas	9 qts (8.5 L)
Oil capacity diesel	9 qts (8.5 L)
Coolant capacity LP gas	21 qts (19.9 L)
Coolant capacity diesel	23 qts (21.8 L)
International Harvester C-263 LP gas	6-cylinder, liquid-cooled vertical L-head
International Harvester D-282 diesel	6-cylinder, liquid-cooled vertical L-head
International Harvester C-263 gasoline	6-cylinder, liquid-cooled vertical L-head

Dimensions

Width	78 inches (min) (198 cm)
Length	142.6 inches (362 cm)
Rear tire	18.4/15-34
Wheelbase	85.5 inches (217 cm)
Front tire	7.50-18
Ag rear tire	18.4/15-34
Ag front tire	7.50-18
Weight ballasted	15,255 lbs (6919 kg)
Industrial rear tire	23.1/18-26, 16.9/14-34
Clearance (front axle)	17.4 inches (44 cm)
Weight operating (gas)	9,635 lbs (4370 kg)
Height (steering wheel)	74 inches (187 cm)
Ground clearance (frame)	19.7 inches (50 cm)
Weight operating (diesel)	9,875 lbs (4479 kg)

Hydraulics

Valves	1
Total flow	12 gpm (45.4 lpm), 17 gpm (optional) (64.3 lpm)
Steering flow	2.5 gpm (9.5 lpm)

Mechanical

Drive	Two-wheel drive
Brakes	Independent mechanical disc brakes
Steering	manual, hydrostatic power optional
Operator station	Open operator station

Production

Type	Standard-tread tractor
Total built	6,945
Manufacturer	International Harvester
Original price	$6,000 (1963)
Years produced	1959 - 1963

Attachments

Height	127.2 inches height (at pin) (323 cm)
Weight	2350 lbs (1065 kg)
Lift capacity	4000 lbs lift (full at pin) (1814 kg)
Breakout force	6500 lbs breakout (2948 kg)
Front-end loader	Wagner 625 Loader

Transmission

Oil capacity	64 qts (60.6 L)
Gears (5-speed)	5 forward and 1 reverse
Torque Amplifier	Yes
Transmission type	sliding gear
Transmission options	5-speed, 10-speed
Gears (Torque Amplifier)	10 forward and 2 reverse
Torque Amplifier details	The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed.