International Harvester
International Harvester Hydro 70
The International Harvester Hydro 70 is a row-crop tractor produced from 1973 to 1976 by International Harvester in Rock Island, Illinois, USA. It features a hydrostatic transmission with infinite forward and reverse speeds in two ranges. The tractor is powered by either a 4.8L 6-cylinder gasoline or a 5.1L 6-cylinder diesel engine, both producing 90 hp gross. It has a wheelbase of 103 inches and an operating weight of 8200 lbs. The Hydro 70 includes power steering, differential dry disc brakes, and an open operator station. It has a rear Type II hitch and an independent 540 rpm rear PTO. The fuel tank capacity is 33 gallons for gasoline and 31 gallons for diesel. The tractor uses 7.50-16 front tires and 15.5-38 rear tires. The Hydro 70 was succeeded by the Hydro 86 model.
Power90 hp
Founded1973 - 1976
ModelHydro 70
Technical Specifications
Detailed specifications and technical data for International Harvester Hydro 70
Power
| PTO (tested) | 69.61 hp (51.9 kW) |
|---|---|
| PTO (claimed) | 69 hp (51.5 kW) |
| Engine (gross) | 90 hp (67.1 kW) |
| Drawbar (tested) | 53.86 hp (40.2 kW) |
| Drawbar (claimed) | 54 hp (40.3 kW) |
Tires
| Rear tire | 15.5-38 |
|---|---|
| Front tire | 7.50-16 |
Engine
| Options | International Harvester 4.8L 6-cyl gasoline, International Harvester 5.1L 6-cyl diesel |
|---|---|
| Diesel engine | 5.1L 6-cylinder liquid-cooled |
| Gasoline engine | 4.8L 6-cylinder liquid-cooled |
| Diesel rated RPM | 2400 |
| Diesel air cleaner | dual stage dry |
| Diesel bore/stroke | 3.875x4.410 inches (98 x 112 mm) |
| Diesel compression | 17:1 |
| Fuel tank (diesel) | 31 gal (117.3 L) |
| Gasoline rated RPM | 2400 |
| Diesel displacement | 312 ci (5.1 L) |
| Diesel power (gross) | 90 hp (67.1 kW) |
| Diesel starter volts | 12 |
| Fuel tank (gasoline) | 33 gal (124.9 L) |
| Gasoline air cleaner | dual stage dry |
| Gasoline bore/stroke | 3.75x4.39 inches (95 x 112 mm) |
| Gasoline compression | 7.5:1 |
| Gasoline displacement | 291 ci (4.8 L) |
| Gasoline power (gross) | 90 hp (67.1 kW) |
| Gasoline starter volts | 12 |
Dimensions
| Width | 87 inches (220 cm) |
|---|---|
| Length | 161 inches (408 cm) |
| Wheelbase | 103 inches (261 cm) |
| Rear tread | 60 to 98 inches (152 to 248 cm) |
| Front tread | 58 to 82 inches (147 to 208 cm) |
| Operating weight | 8200 lbs (3719 kg) |
| Height (steering wheel) | 77 inches (195 cm) |
Electrical
| Charging system | alternator |
|---|
Hydraulics
| Type | open center |
|---|---|
| Pump flow | 12 gpm (45.4 lpm) |
Mechanical
| Drive | Two-wheel drive |
|---|---|
| Brakes | Differential dry disc brakes |
| Steering | Power steering |
| Operator station | Open operator station |
Production
| Type | Row-Crop tractor |
|---|---|
| Built in | Rock Island, Illinois, USA |
| Years made | 1973 - 1976 |
| Manufacturer | International Harvester |
| Original price | $14,200 |
Transmission
| Type | hydrostatic |
|---|---|
| Gears | infinite forward and reverse (2-range) |
Tractor hitch
| Rear Type | II |
|---|
Serial Numbers
| 1973 | 7501 |
|---|---|
| 1974 | 7570 |
| 1975 | 8681 |
| 1976 | 10094 |
| Serial number location | Tractor clutch housing on right side |
Power Take-off (PTO)
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
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