International Harvester
666
Farm tractor · 1972–1976 · 75 hp
International Harvester666
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
| Engine | International Harvester D312 |
|---|---|
| Fuel Type | diesel |
| Cylinders | 6 |
| Cooling | liquid-cooled |
| Displacement | 312 ci (5.1 L) |
| Bore | 3.88 in (98 mm) |
| Stroke | 4.41 in (112 mm) |
| Compression Ratio | 17 |
| Power Gross | 75 hp (55.9 kW) |
| Power PTO | 69.61 hp (51.9 kW) |
| Power Drawbar | 58.01 hp (43.3 kW) |
| Air Cleaner | dual stage dry |
| Fuel System | direct injection |
| Starter Volts | 12 |
| Coolant Capacity | 21 qts (19.9 L) |
| Manufacturer | International Harvester |
| Rated | 2,000 RPM |
Transmission
| Transmission Type | sliding gear |
|---|---|
| Gears | 5 forward and 1 reverse |
| Available Options | 5-speed, hydrostatic, 10-speed two-speed power shift |
Hydraulics
| Type | open center |
|---|---|
| Pump Flow | 12 gpm (45.4 lpm) |
PTO
| Rear Type | independent |
|---|
Hitch
| Rear Type | II |
|---|
Dimensions
| Length | 161 in (408 cm) |
|---|---|
| Width | 87 in (220 cm) |
| Height | 77 in (195 cm) |
| Wheelbase | 103 in (261 cm) |
| Front Tread | 50 in (127 cm) |
| Rear Tread | 50 in (127 cm) |
Weight
| Shipping | 7,420 lbs (3,365 kg) |
|---|
Tires & Tracks
| Front Ag | 7.50-16 |
|---|---|
| Rear Ag | 15.5-38 |
Fuel
| Capacity | 33 gal (124.9 L) |
|---|
Steering
| Type | two-post |
|---|
Cab
| Cab | available with air-conditioning |
|---|
Compatible Implements
| Model | Type | Width | Min HP |
|---|---|---|---|
| Land Pride RCF2760 | Rotary Cutters | 60" | 35 hp |
| BEFCO BRC-172 | Rotary Cutters | 72" | 35 hp |
| Land Pride RCF2772 | Rotary Cutters | 72" | 35 hp |
| BEFCO RMD-360 | Rotary Cutters | 60" | 35 hp |
| BEFCO BRC-272 | Rotary Cutters | 72" | 35 hp |
| Bush Hog BH310-2 | Rotary Cutters | 60" | 35 hp |
| Land Pride RCD1884 | Rotary Cutters | 84" | 35 hp |
| BEFCO RMD-372 | Rotary Cutters | 72" | 40 hp |
| Land Pride RCF2696 | Rotary Cutters | 96" | 40 hp |
| Land Pride RCF2084 | Rotary Cutters | 84" | 45 hp |
| Land Pride RCR1884 | Rotary Cutters | 84" | 45 hp |
| Bush Hog BH310 variant 2 | Rotary Cutters | 72" | 45 hp |
| Land Pride RCR2596 - 3 PT | Rotary Cutters | 96" | 50 hp |
| Land Pride RCF3096 - 3PT | Rotary Cutters | 96" | 50 hp |
| Bush Hog BH210-3 variant 3 | Rotary Cutters | 84" | 50 hp |
| Land Pride RCF3696 - 3PT | Rotary Cutters | 96" | 50 hp |
| Land Pride RCFM3696 - 3PT | Rotary Cutters | 96" | 50 hp |
| BEFCO RHD-472 | Rotary Cutters | 72" | 50 hp |
| Bush Hog BH310 variant 3 | Rotary Cutters | 84" | 55 hp |
| Land Pride RCF3672 | Rotary Cutters | 72" | 60 hp |
| Land Pride RCFM3610 - 3PT | Rotary Cutters | 120" | 60 hp |
| Land Pride RCFM3010 - 3PT | Rotary Cutters | 120" | 60 hp |
| Land Pride RCF3010 - 3PT | Rotary Cutters | 120" | 60 hp |
| Land Pride RCF3610 - 3PT | Rotary Cutters | 120" | 60 hp |
| BEFCO RHD-484 | Rotary Cutters | 84" | 60 hp |
| Bush Hog BH410 variant 1 | Rotary Cutters | 72" | 60 hp |
| Land Pride RCF2784 - 3PT | Rotary Cutters | 84" | 60 hp |
| Land Pride RCR2510 - 3 PT | Rotary Cutters | 120" | 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