International Harvester Hydro 70

Last Updated: July 2024

Overview

The International Harvester Hydro 70 is a tractor model powered by a 290.8 cu in (4.8 L) 6-cylinder gasoline engine with a bore of 3.75 in, stroke of 4.39 in, compression ratio of 7.5 to 1, and a D/^" carburetor. It has a hydrostatic steering type and transmission offering infinite gears in both forward and reverse within a two-range setting. The operating weight is 7,875 lbs without ballast and 10,140 lbs with ballast. Rear tires are 18.4-34 (6-ply, 16 psi) and front tires are 9.5L-15 (6-ply, 28 psi). Detailed performance metrics are available for power take-off, drawbar, and sound levels. The tractor features a standard chassis type and a 12-volt electric cranking system.

Key Specifications

Transmission: Hydrostatic

Operating Weight: 7875 (without ballast), 10140 (with ballast)

Technical Specifications

Engine

Manufacturer: International Harvester
Model: -
Cooling Type: -
Cylinder Orientation: -
Valve Configuration: -
Fuel Type: -
Induction Type: -
Cylinders: 6
Displacement (ci): -
Bore (in): -
Stroke (in): -
Rated RPM: 2400
Power Output (hp): -

Transmission

Type: Hydrostatic
Forward Gears: Infinite (2-range)
Reverse Gears: Infinite (2-range)
Total Gears: -

Dimensions

Length (in): -
Width (in): -
Height (in): -
Operating Weight (lb): 7875 (without ballast), 10140 (with ballast)

Power Take-Off (PTO)

PTO Type: -
PTO Speed 1 (rpm): -
PTO Speed 2 (rpm): -
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: Hydrostatic power
Coolant Capacity (qts): -
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: -
Manufacture - End Year: -
Hitch Type: Category II
Hitch Category: Category 3
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: -
Starter Type: Electric
Brake Type: -
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: November 14 to December 3, 1973

Maximum Power and Fuel Consumption

Maximum Power (at Rated Engine Speed - 2400 rpm): 69.61 HP
Fuel Consumption at Maximum Power: 6.933 Gal/hr with a fuel efficiency of 0.609 lb/hp.hr (10.04 Hp-hr/gal)

Power Take-Off Performance

Standard Power Take-off Speed (540 rpm): 64.10 HP at 1986 rpm
Fuel Consumption at Standard PTO Speed: 5.775 Gal/hr with a fuel efficiency of 0.551 lb/hp.hr (11.10 Hp-hr/gal)

Drawbar Performance

Maximum Available Power (2 Hours - Lo Range 4.0 MPH): 53.86 HP with a drawbar pull of 4940 lbs
Fuel Consumption at Maximum Power: 6.50 Gal/hr with a fuel efficiency of 0.799 lb/hp.hr (7.65 Hp-hr/gal)

Sound Level Without Cab

Maximum Available Power (2 Hours): 100.0 dB(A)
75% of Pull at Maximum Power (10 Hours): 98.0 dB(A)
Bystander (21.5 MPH Hi Range): 89.0 dB(A)

Tire, Ballast, and Weight (Without Ballast)

Rear Tires: Two 18.4-34; 6; 16 (No Liquid, No Cast Iron)
Front Tires: Two 9.5L-15; 6; 28 (No Liquid, No Cast Iron)
Total Weight: 7875 lbs

Recommended Citation Format
Nebraska Tractor Test Lab. "Test 1154: International Hydro 666, 70 and 86 Gasoline" (1973). Nebraska Tractor Tests. 1477. Link to document