International Harvester

666

Farm tractor · 1972–1976 · 75 hp

The International Harvester 666 is a farm tractor manufactured from 1972 to 1976. It features a International Harvester D312 engine, and two-post steering. The transmission is a sliding gear type with 5 forward and 1 reverse.

Engine

EngineInternational Harvester D312
Fuel Typediesel
Cylinders6
Coolingliquid-cooled
Displacement312 ci (5.1 L)
Bore3.88 in (98 mm)
Stroke4.41 in (112 mm)
Compression Ratio17
Power Gross75 hp (55.9 kW)
Power PTO69.61 hp (51.9 kW)
Power Drawbar58.01 hp (43.3 kW)
Air Cleanerdual stage dry
Fuel Systemdirect injection
Starter Volts12
Coolant Capacity21 qts (19.9 L)
ManufacturerInternational Harvester
Rated2,000 RPM

Transmission

Transmission Typesliding gear
Gears5 forward and 1 reverse
Available Options5-speed, hydrostatic, 10-speed two-speed power shift

Hydraulics

Typeopen center
Pump Flow12 gpm (45.4 lpm)

PTO

Rear Typeindependent

Hitch

Rear TypeII

Dimensions

Length161 in (408 cm)
Width87 in (220 cm)
Height77 in (195 cm)
Wheelbase103 in (261 cm)
Front Tread50 in (127 cm)
Rear Tread50 in (127 cm)

Weight

Shipping7,420 lbs (3,365 kg)

Tires & Tracks

Front Ag7.50-16
Rear Ag15.5-38

Fuel

Capacity33 gal (124.9 L)

Steering

Typetwo-post

Cab

Cabavailable with air-conditioning

Compatible Implements

ModelTypeWidthMin HP
Land Pride RCF2760Rotary Cutters60"35 hp
BEFCO BRC-172Rotary Cutters72"35 hp
Land Pride RCF2772Rotary Cutters72"35 hp
BEFCO RMD-360Rotary Cutters60"35 hp
BEFCO BRC-272Rotary Cutters72"35 hp
Bush Hog BH310-2Rotary Cutters60"35 hp
Land Pride RCD1884Rotary Cutters84"35 hp
BEFCO RMD-372Rotary Cutters72"40 hp
Land Pride RCF2696Rotary Cutters96"40 hp
Land Pride RCF2084Rotary Cutters84"45 hp
Land Pride RCR1884Rotary Cutters84"45 hp
Bush Hog BH310 variant 2Rotary Cutters72"45 hp
Land Pride RCR2596 - 3 PTRotary Cutters96"50 hp
Land Pride RCF3096 - 3PTRotary Cutters96"50 hp
Bush Hog BH210-3 variant 3Rotary Cutters84"50 hp
Land Pride RCF3696 - 3PTRotary Cutters96"50 hp
Land Pride RCFM3696 - 3PTRotary Cutters96"50 hp
BEFCO RHD-472Rotary Cutters72"50 hp
Bush Hog BH310 variant 3Rotary Cutters84"55 hp
Land Pride RCF3672Rotary Cutters72"60 hp
Land Pride RCFM3610 - 3PTRotary Cutters120"60 hp
Land Pride RCFM3010 - 3PTRotary Cutters120"60 hp
Land Pride RCF3010 - 3PTRotary Cutters120"60 hp
Land Pride RCF3610 - 3PTRotary Cutters120"60 hp
BEFCO RHD-484Rotary Cutters84"60 hp
Bush Hog BH410 variant 1Rotary Cutters72"60 hp
Land Pride RCF2784 - 3PTRotary Cutters84"60 hp
Land Pride RCR2510 - 3 PTRotary Cutters120"60 hp

Checked: 3-point hitch category, PTO horsepower. Not checked: PTO speed (540/1000), hydraulic flow, 3-point lift capacity, rear remotes, ballast.

These implements meet this tractor's hitch and PTO-HP requirements — this is not a full compatibility guarantee. Confirm the remaining specs with your dealer before purchasing.

Nebraska Tests

NTTLTest #1152

Nebraska Tractor Test

Drawbar
2271HP
NTTLTest #1152

Nebraska Tractor Test

Drawbar
2271HP