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Farmall Hydro 70

The Farmall Hydro 70 is a row-crop tractor built by Farmall, part of 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 International Harvester engine, both rated at 90 hp gross. It has a fuel tank capacity of 33 gallons for gasoline and 31 gallons for diesel. The Hydro 70 offers 54 hp drawbar power claimed and 69 hp PTO power claimed, with tested values close to these. It includes two-wheel drive, power steering, differential dry disc brakes, and an open operator station. The hydraulic system is open center with a 12 gpm pump flow. The tractor hitch is category II with an independent 540 rpm rear PTO. Dimensions include a 103-inch wheelbase, 161-inch length, 87-inch width, and 77-inch height at the steering wheel, with an operating weight of 8200 lbs. Tires are 7.50-16 front and 15.5-38 rear. The electrical system uses an alternator charging system. Serial numbers range from 1973 to 1976 with specific numbers listed, and the serial number location is on the tractor clutch housing on the right side.
Farmall Hydro 70Farmall tractorsInternational Harvesterrow-crop tractorhydrostatic transmission90 hp tractortractor specifications
Power90 hp
Founded1973 - 1976
ModelHydro 70

Technical Specifications

Detailed specifications and technical data for Farmall 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

Ag rear:15.5-38
Ag front:7.50-16
Rear tire:15.5-38
Front tire:7.50-16

Engine

Rated RPM:2400
Air cleaner:dual stage dry
Bore/Stroke:3.75x4.39 inches (95 x 112 mm)
Compression:7.5:1
Displacement:291 ci (4.8 L)
Power (gross):90 hp (67.1 kW)
Starter volts:12
Engine options:International Harvester 4.8L 6-cyl gasoline; International Harvester 5.1L 6-cyl diesel
Rated RPM diesel:2400
Air cleaner diesel:dual stage dry
Bore/Stroke diesel:3.875x4.410 inches (98 x 112 mm)
Compression diesel:17:1
Fuel tank (diesel):31 gal (117.3 L)
Displacement diesel:312 ci (5.1 L)
Fuel tank (gasoline):33 gal (124.9 L)
Power (gross) diesel:90 hp (67.1 kW)
Starter volts diesel:12
International Harvester diesel engine:6-cylinder, liquid-cooled
International Harvester gasoline engine:6-cylinder, liquid-cooled

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

Built in:Rock Island, Illinois, USA
Manufacturer:Farmall (a part of 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)