Brand siblingUtility
International Harvester 666
The International Harvester 666 is a utility tractor built from 1972 to 1976. It's a 2-wheel drive machine with a powerful 6-cylinder diesel engine. The engine is big for its class, with 312 cubic inches of displacement. It runs at 2000 rpm, which is slower than most tractors but helps save fuel. This tractor weighs 7053 pounds, making it heavier than many similar models. It has a sliding gear transmission with 5 forward speeds and 1 reverse. The 666 comes with hydrostatic power steering for easy handling and dry disc brakes for good stopping power. It has a rear PTO that spins at 540 rpm, which is great for running farm tools. The tractor uses the IH Fast Hitch system and has a Category II hitch at the back. Farmers can choose between an open cab or a two-post ROPS for safety.
ManufacturerInternational HarvesterEngine6-cylTransSliding gear
Image not recorded
Quick specs
- Category
- Utility
- Operating Weight
- 7,053 lb
- Transmission
- Sliding gear
Overview
About the International Harvester 666
The International Harvester 666 is a utility tractor built from 1972 to 1976. It's a 2-wheel drive machine with a powerful 6-cylinder diesel engine. The engine is big for its class, with 312 cubic inches of displacement. It runs at 2000 rpm, which is slower than most tractors but helps save fuel. This tractor weighs 7053 pounds, making it heavier than many similar models. It has a sliding gear transmission with 5 forward speeds and 1 reverse. The 666 comes with hydrostatic power steering for easy handling and dry disc brakes for good stopping power. It has a rear PTO that spins at 540 rpm, which is great for running farm tools. The tractor uses the IH Fast Hitch system and has a Category II hitch at the back. Farmers can choose between an open cab or a two-post ROPS for safety.
Full specifications
Every recorded spec
General
| Manufacturer | International Harvester |
|---|---|
| Model | 666 |
| Category | Utility tractor |
| Type | 4x2 2WD |
| Years built | 1972–1976 |
| Operating weight | 7,053lb |
Engine
| Make | International Harvester |
|---|---|
| Model | D312 |
| Cylinders | 6 |
| Displacement | 312ci |
| Bore | 3.86in |
| Stroke | 4.41in |
Transmission
| Type | Sliding gear |
|---|---|
| Forward gears | 5 |
| Reverse gears | 1 |
Chassis & drive
| Chassis | 4x2 2WD |
|---|---|
| Drive | 2WD |
| Steering | Hydrostatic power |
| Brakes | Dry disc |
| Cab | Open or Two-post ROPS (optional) |
Power take-off
| Rear PTO | Independent Rear PTO |
|---|---|
| PTO speed | 540rpm |
Dimensions
| Operating weight | 7,053lb |
|---|
Head to head
666 vs. Utility median
How the International Harvester 666 compares to other Utility tractors
| Spec | This model | Utility median | Difference | Percentile |
|---|---|---|---|---|
| Engine Displacement | 312 ci | 183 ci | +70% | 85th |
| Cylinders | 6 | 4 | +50% | 93rd |
| Forward Gears | 5 | 12 | -58% | 6th |
| Operating Weight | 7,053 lb | 5,303 lb | +33% | 67th |
Medians and percentiles are computed from the utility tractors in our database with a recorded value for each spec (sample sizes 4,941–5,720 models).
Compare to tractors with similar specs
Commonly compared International Harvester tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| International Harvester 100 | — | 2,600 lb | — | Compare → |
| International Harvester 1026 | 127 hp | 11,100 lb | — | Compare → |
| International Harvester 1255 | 125 hp | 12,215 lb | — | Compare → |
| International Harvester 1256 | 113 hp | 10,405 lb | 1967–1969 | Compare → |
| International Harvester 130 | — | 2,800 lb | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Advance-Rumely 6A | — | 6,370 lb | — | Compare → |
| Advance-Rumely DoAll | — | 3,702 lb | — | Compare → |
| Advance-Rumely OilPull B 25/45 | — | 25,000 lb | — | Compare → |
| Advance-Rumely OilPull E 30/60 | — | 26,300 lb | — | Compare → |
| Advance-Rumely OilPull F 15/30 | — | 16,500 lb | — | Compare → |
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FAQ
Common questions
When was the International Harvester 666 made?
The International Harvester 666 was manufactured from 1972 to 1976.
What engine configuration does the International Harvester 666 use?
The International Harvester 666 is equipped with a 6-cylinder engine displacing 312 ci.
What is the operating weight of the International Harvester 666?
In working trim, the International Harvester 666 comes in at roughly 7,053 lb.
Which transmission does the International Harvester 666 use?
The International Harvester 666 is equipped with a Sliding gear transmission with 5 forward gears.
What three-point hitch category does the International Harvester 666 use?
The International Harvester 666 has a Category II three-point hitch.
How do I maintain a International Harvester 666?
Routine service for the International Harvester 666 covers engine oil and filter changes, hydraulic and coolant level checks, air filter cleaning, and scheduled inspections. Refer to the manufacturer's maintenance schedule for exact intervals.