International Harvester Hydro 70 Specs ( 1973-1976 )
Overview
The International Harvester Hydro 70 is a row-crop farm tractor produced between 1973 and 1976 that features a 2-range hydrostatic transmission with infinite gears in forward and reverse. It was manufactured in Rock Island, Illinois, with an operating weight of 8200 lbs and options for either a 4.8L gasoline or a 5.1L diesel six-cylinder engine. The tractor is equipped with an open operator station, power steering, and a 103-inch wheelbase.
Ideal Applications
Hydrostatic Transmission Configuration:
The tractor utilizes a hydrostatic drive system that provides infinite speed control in both forward and reverse directions through two separate ranges.
Tested PTO and Drawbar Output:
Nebraska Tractor Test 1154 and 1155 recorded maximum PTO power between 69.51 and 69.61 hp, while maximum drawbar pull reached up to 8,427 lbs in gasoline testing.
Chassis and Tread Dimensions:
The model features an adjustable rear tread width ranging from 60 to 98 inches and an adjustable front tread of 58 to 82 inches to suit various row-crop requirements.
Production
| Description | Row-Crop tractor / Built in Rock Island, Illinois, USA |
|---|---|
| Manufacturer | International Harvester |
| Original price | $14,200 |
Engine
| Air cleaner | dual stage dry / dual stage dry |
|---|---|
| Bore/Stroke | 3.75x4.39 inches (95 x 112 mm) / 3.875x4.410 inches (98 x 112 mm) |
| Compression | 7.5:1 / 17:1 |
| Description | International Harvester / gasoline / 6-cylinder / liquid-cooled / International Harvester / diesel / 6-cylinder / liquid-cooled |
| Displacement | 291 ci (4.8 L) / 312 ci (5.1 L) |
| Power (gross) | 90 hp (67.1 kW) / 90 hp (67.1 kW) |
| Rated RPM | 2400 / 2400 |
| Starter volts | 12 / 12 |
| Engine type | International Harvester 4.8L 6-cyl gasoline / International Harvester 5.1L 6-cyl diesel |
| Engine type | International Harvester 4.8L 6-cyl gasoline / International Harvester 5.1L 6-cyl diesel |
| Fuel tank | 33 gal (gas) (124.9 L) |
| Drawbar (claimed) | 54 hp (40.3 kW) |
| Drawbar (tested) | 53.86 hp (40.2 kW) |
| Engine (gross) | 90 hp (67.1 kW) |
| PTO (claimed) | 69 hp (51.5 kW) |
| PTO (tested) | 69.61 hp (51.9 kW) |
Transmission
| Description | hydrostatic |
|---|---|
| Gears | infinite forward and reverse (2-range) |
| Type | hydrostatic |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Power steering / Differential dry disc brakes |
| Drive type | Two-wheel drive |
Hydraulics
| Pump flow | 12 gpm (45.4 lpm) |
|---|---|
| Type | open center |
Hitch
| Rear Type | II |
|---|
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
Electrical
| Charging system | alternator |
|---|
Dimensions & Tires
| Front tread | 58 to 82 inches (147 to 208 cm) |
|---|---|
| Height (steering wheel) | 77 inches (195 cm) |
| Length | 161 inches (408 cm) |
| Operating weight | 8200 lbs (3719 kg) |
| Rear tread | 60 to 98 inches (152 to 248 cm) |
| Wheelbase | 103 inches (261 cm) |
| Width | 87 inches (220 cm) |
| Front tire | 7.50-16 |
| Rear tire | 15.5-38 |
| Weight | 8200 lbs (3719 kg) |
| Wheelbase | 103 inches (261 cm) |
| Ag front | 7.50-16 |
| Ag rear | 15.5-38 |
Hydro 70 Serial Number Location
| Description | Tractor clutch housing on right side. |
|---|
Hydro 70 Serial Numbers
| 1973 | 7501 |
|---|---|
| 1974 | 7570 |
| 1975 | 8681 |
| 1976 | 10094 |
| Description | FAQ: How to read a serial number table. |
Nebraska Tractor Test 1154
| Description | Gasoline hydrostatic 2WDNovember 14 - December 3, 1973Link: Nebraska Tractor Test 1154 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 6.9 gal/hour (26.1 l/hour) / 5.8 gal/hour (22.0 l/hour) / 7.7 gal/hour (29.1 l/hour) |
| Max power | 53.86 hp (40.2 kW) |
| Max pull | 8,427 lbs (3822 kg) |
| Power at rated engine speed | 69.61 hp (51.9 kW) |
| Power at rated PTO speed | 64.10 hp (47.8 kW) |
Nebraska Tractor Test 1155
| Description | Diesel hydrostatic 2WDNovember 14 - December 3, 1973Link: Nebraska Tractor Test 1155 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 5.6 gal/hour (21.2 l/hour) / 5.3 gal/hour (20.1 l/hour) / 5.6 gal/hour (21.2 l/hour) |
| Max power | 53.10 hp (39.6 kW) |
| Max pull | 8,310 lbs (3769 kg) |
| Power at rated engine speed | 69.51 hp (51.8 kW) |
| Power at rated PTO speed | 65.41 hp (48.8 kW) |
References
| Description | Farm Equipment Reference Catalog published in 1975, by International Harvester |
|---|
Tractor Tests
| Description | NTTL 1154: gasoline hydrostatic 2WD / NTTL 1155: diesel hydrostatic 2WD |
|---|