International Harvester 660

The International Harvester 660 is a tractor produced by International Harvester. It is equipped with a 263 ci 4.3 L engine. The rated power output is 95 hp 70.8 kW. Transmission: Torque Amplifier. Operating weight: 9635 to 9875 pounds.

Overview

	1959 - 1963 Standard-tread tractor
1959 - 1963
Standard-tread tractor

Production
Manufacturer	International Harvester
Standard-tread tractor
Total built	6,945
Original price	$6,000 (1963)

International Harvester 660 Power
Engine	95 hp 70.8 kW
Plows	6
Drawbar (tested)	70.21 hp 52.4 kW
PTO (tested)	81.39 hp 60.7 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	manual
	hydrostatic power optional
Independent mechanical disc brakes
Open operator station.

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

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

Dimensions & Tires
Wheelbase	85.5 inches 217 cm
Weight	9635 to 9875 pounds
Front tire	7.50-18
Rear tire	18.4/15-34
Full dimensions and tires ...

References
Buyers Guide International Industrial Tractors & Equipment published in 1960, by International Harvester
Industrial Tractors and matched equipment published in 1960, by International Harvester
Industrial Tractors & Equipment Buyers Guide published in 1962, by International Harvester
Direct-Start Diesel Tractors published in 1958, by International Harvester

Engine

Engine options
International Harvester 4.3L 6-cyl gasoline
International Harvester 4.6L 6-cyl diesel
International Harvester 4.3L 6-cyl LP gas

Engine Detail — 263 ci / 4.3 L Gasoline

Manufacturer	International Harvester C-263
Fuel Type	Gasoline
Configuration	6-cylinder, liquid-cooled vertical L-head
Displacement	263 ci 4.3 L
Bore/Stroke	3.5625x4.3906 inches 90 x 112 mm
Power	95 hp 70.8 kW
Air cleaner	oil bath
Compression	7.2:1
Rated RPM	2400
Torque	219 lb-ft 297.0 Nm
Torque RPM	1300
Oil capacity	9 qts 8.5 L
Coolant capacity	20 qts 18.9 L

Engine Detail — 282 ci / 4.6 L Diesel

Manufacturer	International Harvester D-282
Fuel Type	Diesel
Configuration	6-cylinder, liquid-cooled vertical L-head
Displacement	282 ci 4.6 L
Bore/Stroke	3.6875x4.3906 inches 94 x 112 mm
Power	95 hp 70.8 kW
Air cleaner	oil bath
Compression	18.2:1
Rated RPM	2400
Torque	219 lb-ft 297.0 Nm
Torque RPM	1800
Firing order	1-5-3-6-2-4
Oil capacity	9 qts 8.5 L
Coolant capacity	23 qts 21.8 L

Engine Detail — 263 ci / 4.3 L LP Gas

Manufacturer	International Harvester C-263
Fuel Type	LP gas
Configuration	6-cylinder, liquid-cooled vertical L-head
Displacement	263 ci 4.3 L
Bore/Stroke	3.5625x4.3906 inches 90 x 112 mm
Power	95 hp 70.8 kW
Air cleaner	oil bath
Compression	8.75:1
Rated RPM	2400
Torque	212 lb-ft 287.5 Nm
Torque RPM	1200
Oil capacity	9 qts 8.5 L
Coolant capacity	21 qts 19.9 L

Transmission

Transmission options
5-speed
10-speed

Transmission — sliding gear

Transmission	sliding gear
Gears	5 forward and 1 reverse
Oil capacity	64 qts 60.6 L
With 18.4/15-34 rear tires.

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Gears	10 forward and 2 reverse
Oil capacity	64 qts 60.6 L
The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed.
With 18.4/15-34 rear tires.

Dimensions

International Harvester 660 Tires
Ag front	7.50-18
Ag rear	18.4/15-34
Industrial rear	23.1/18-26
	16.9/14-34

Dimensions
Wheelbase	85.5 inches 217 cm
Length	142.6 inches 362 cm
Width	78 inches (min) 198 cm
Height (steering wheel)	74 inches 187 cm
Ground clearance	19.7 inches (frame) 50 cm
Clearance (front axle)	17.4 inches 44 cm

International Harvester 660 Weight
Operating	9,635 lbs (gas) 4370 kg
	9,875 lbs (diesel) 4479 kg
Ballasted	15,255 lbs 6919 kg

Tests

Tractor Tests
NTTL 715: diesel TA 2WD
NTTL 721: gasoline TA 2WD
NTTL 722: LP gas TA 2WD

Nebraska Tractor Test 715
Diesel TA 2WD August 31 - September 5, 1959 Link: Nebraska Tractor Test 715 file
PTO performance
Power at rated engine speed	78.78 hp 58.7 kW
Fuel use	5.5 gal/hour 20.8 l/hour
Drawbar performance
Max power	64.43 hp 48.0 kW
Fuel use	5.2 gal/hour 19.7 l/hour
Max pull	11,046 lbs 5010 kg
Gear 2-TA used for pull test.

Nebraska Tractor Test 721
Gasoline TA 2WD October 1 - 12, 1959 Link: Nebraska Tractor Test 721 file
PTO performance
Power at rated engine speed	81.39 hp 60.7 kW
Fuel use	6.4 gal/hour 24.2 l/hour
Drawbar performance
Max power	70.21 hp 52.4 kW
Fuel use	6.3 gal/hour 23.8 l/hour

Nebraska Tractor Test 722
LP gas TA 2WD October 3 - 12, 1959 Link: Nebraska Tractor Test 722 file
PTO performance
Power at rated engine speed	80.63 hp 60.1 kW
Fuel use	8.9 gal/hour 33.7 l/hour
Drawbar performance
Max power	69.66 hp 51.9 kW
Fuel use	8.8 gal/hour 33.3 l/hour

Photos

International 660 right side.

International 660 left side.

International 660 operator station and controls.