International Harvester 1566 vs International Harvester 6788
10 material differences · fewer than 12
Which should you choose?
We will not advise between these two machines, because the drive differs (Two-wheel or four-wheel drive; 4WD); they were not built in overlapping years (1974–1976; 1981–1984). The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.
Field by field
10 material differences · 4 fields identical or within 5%, which is not counted as material
| Field | 1566 | 6788 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 161 hp | 170.6 hp | +6% 6788 |
| Engine declared | INTERNATIONAL HARVESTER DT-436 | INTERNATIONAL HARVESTER DT-466 B | differs |
| Displacement declared | 7.14 L | 7.64 L | +7% 6788 |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 18.6 mph · 30 km/h | — |
| Clutch declared | Pedal-operated ceramic clutch | Pedal operated dry clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 12.0 gpm · 45.5 L/min | 18.0 gpm · 68.1 L/min | +50% 6788 |
| Three-point lift at ends declared | 5,798 lb · 2,630 kg | 8,598 lb · 3,900 kg | +48% 6788 |
| Rear PTO speeds declared | 1000 rpm | 1000 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 15,194 lb · 6,892 kg | 18,620 lb · 8,446 kg | +23% 6788 |
| Wheelbase declared | 104.8 in · 2,662 mm | 110.0 in · 2,794 mm | — |
| Length declared | 168.0 in · 4,267 mm | 228.3 in · 5,799 mm | +36% 6788 |
| Width declared | 112.0 in · 2,845 mm | 112.0 in · 2,845 mm | — |
| Height declared | 125.0 in · 3,175 mm | 115.8 in · 2,941 mm | +8% 1566 |
| Ground clearance declared | 17.0 in · 432 mm | 28.4 in · 721 mm | +67% 6788 |
| Turning radius, braked declared | 11.9 ft · 3.63 m | — | — |
| Fuel tank declared | 168.0 qt · 159.0 L | 356.1–555.8 qt · 337.0–526.0 L | differs |
International Harvester 1566 sources
Source
- Source: Traktorenlexikon, “Farmall Farmall 1566”
- Source: Traktorenlexikon, “IHC 1466”
- Source: Traktorenlexikon, “IHC 1566”
International Harvester 6788 sources
Source
- Source: Traktorenlexikon, “IHC 6788”
- Source: Traktorenlexikon, “IHC 3588”