International Harvester Hydro 86

The International Harvester Hydro 86 is a tractor produced by International Harvester. It is equipped with a 310 ci 5.1 L engine. The listed engine power is 70.89 hp 52.9 kW. Transmission: variable forward and reverse (2-range). Operating weight: 8200 lbs 3719 kg.

Engine Power

70.89 hp 52.9 kW

Fuel & Capacities

Diesel

Transmission

variable forward and reverse (2-range)

Operating Weight

8200 lbs 3719 kg

Overview

	1976 - 1980 86 SeriesRow-Crop tractor 86 Series Row-Crop tractor

Production
Manufacturer	International Harvester
Row-Crop tractor
Original price was $23,400 in 1980

International Harvester Hydro 86 Transmission
hydrostatic
Transmission details ...

International Harvester Hydro 86 Power
Drawbar (claimed)	53.4 hp 39.8 kW
PTO (claimed)	69.51 hp 51.8 kW
Drawbar (tested)	53.86 hp 40.2 kW
PTO (tested)	70.89 hp 52.9 kW
Performance test details ...

Mechanical
Two-wheel drive
Power steering
Differential dry disc brakes
Open operator station.

Hydraulics
Type	open center
Valves	1
Pump flow	12 gpm 45.4 lpm

Tractor hitch
Rear Type	II

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540 (1.375)

Dimensions & Tires
Weight	8200 lbs 3719 kg
Front tire	7.50-16
Rear tire	15.5-38
Full dimensions and tires ...

References

1978 Buyer's Guide published by International Harvester
1979 Buyer's Guide published by International Harvester

Engine

Engine options
International Harvester 5.1L 6-cyl diesel
International Harvester 4.8L 6-cyl gasoline

Engine Detail — 312 ci / 5.1 L Diesel

Manufacturer	International Harvester D-312
Fuel Type	Diesel
Configuration	6-cylinder, liquid-cooled
Displacement	312 ci 5.1 L
Bore/Stroke	3.875x4.410 inches 98 x 112 mm
Air cleaner	dual dry element with unloader
Compression	17:1
Rated RPM	2400
Starter volts	12

Engine Detail — 290.8 ci / 4.8 L Gasoline

Manufacturer	International Harvester
Fuel Type	Gasoline
Configuration	6-cylinder, liquid-cooled
Displacement	290.8 ci 4.8 L
Bore/Stroke	3.75x4.39 inches 95 x 112 mm
Air cleaner	dual stage dry with dust unloader
Compression	7.5:1
Rated RPM	2400
Starter volts	12

Engine Detail — 310 ci / 5.1 L Diesel

Manufacturer	International Harvester D-310
Fuel Type	Diesel
Configuration	6-cylinder, liquid-cooled
The D-310 diesel was used on the Hydro 86, replacing the 312, during production in 1979.
Displacement	310 ci 5.1 L
Bore/Stroke	3.875x4.375 inches 98 x 111 mm
Air cleaner	dry
Compression	15.1:1
Rated RPM	2400

Transmission

Transmission — variable forward and reverse (2-range) hydrostatic

Type	hydrostatic
Gears	variable forward and reverse (2-range)

Dimensions

International Harvester Hydro 86 Tires
Ag front	7.50-16
Ag rear	15.5-38

Dimensions
Operating weight	8200 lbs 3719 kg
Ballasted weight	10430 lbs 4731 kg

Tests

Tractor Tests
NTTL 1154: gasoline hydrostatic 2WD
NTTL 1155: 312 diesel hydrostatic 2WD
NTTL 1337: 310 diesel hydrostatic 2WD

Nebraska Tractor Test 1154
Gasoline hydrostatic 2WD November 14 - December 3, 1973 Link: Nebraska Tractor Test 1154 file
PTO performance
Power at rated engine speed	69.61 hp 51.9 kW
Fuel use	6.9 gal/hour 26.1 l/hour
Power at rated PTO speed	64.10 hp 47.8 kW
Fuel use	5.8 gal/hour 22.0 l/hour
Drawbar performance
Max power	53.86 hp 40.2 kW
Fuel use	7.7 gal/hour 29.1 l/hour
Max pull	8,427 lbs 3822 kg

Nebraska Tractor Test 1155
312 diesel hydrostatic 2WD November 14 - December 3, 1973 Link: Nebraska Tractor Test 1155 file
PTO performance
Power at rated engine speed	69.51 hp 51.8 kW
Fuel use	5.6 gal/hour 21.2 l/hour
Power at rated PTO speed	65.41 hp 48.8 kW
Fuel use	5.3 gal/hour 20.1 l/hour
Drawbar performance
Max power	53.10 hp 39.6 kW
Fuel use	5.6 gal/hour 21.2 l/hour
Max pull	8,310 lbs 3769 kg

Nebraska Tractor Test 1337
310 diesel hydrostatic 2WD March 27 - September 17, 1980 Link: Nebraska Tractor Test 1337 file
PTO performance
Power at rated engine speed	70.89 hp 52.9 kW
Fuel use	5.3 gal/hour 20.1 l/hour
Power at rated PTO speed	66.64 hp 49.7 kW
Fuel use	4.7 gal/hour 17.8 l/hour
Drawbar performance
Max power	52.49 hp 39.1 kW
Fuel use	5.3 gal/hour 20.1 l/hour
Pull at 6.5 KPH
Max pull	8815 lbs 3998 kg
Pull at 3.3 KPH

Photos

International Harvester Hydro 86

Recommended Implements & Sizing Guide

Engineering recommendations for International Harvester Hydro 86 based on its 70.89 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	3 to 4 Bottom (16")3 - 4 铧 (40 cm)	Heavy Duty	Suitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing	7 to 8 ft (84-96 in)2.1 - 2.4 m	Heavy Duty	Heavy-duty twin spindle cutter for overgrown acreage.
Rotary TillerSeedbed Prep	78 to 84 in200 - 215 cm	Heavy Duty	Heavy commercial tiller with multi-speed gearbox.
Disc HarrowSecondary Tillage	7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙	Medium Duty	Field leveling and clod breaking behind plows.
Hay BalerHay & Forage	4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机	Heavy Duty	Silage and dry hay; 540 RPM PTO with slip-clutch.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester Hydro 86.

Estimated Continuous Field Runtime: 1.4 hrs

Approximately 1.4 hours of continuous field operation at ~75% rated power on a full tank (5.3 gal / 20.1 L).

Estimated 75% Load Fuel Burn~3.7 gal/hr (14 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours