International Harvester

International Harvester Hydro 186

The International Harvester Hydro 186 is a row-crop tractor produced from 1976 to 1981 as part of the 86 Series. Built in Rock Island, Illinois, USA, it features a 7.1L 6-cylinder diesel engine with hydrostatic transmission offering variable speeds with two-range forward and reverse. It is available in two- or four-wheel drive configurations with power assist steering and hydraulic disc brakes. The tractor includes a standard cab with air-conditioning, with options for an open operator station and four-post ROPS. Fuel capacity is 50 gallons with an auxiliary 22 gallons, and the hydraulic system holds 28.5 gallons. The rear hitch is category II with a lift capacity of 6660 lbs at 24 inches. PTO is independent with 540/1000 RPM options. Dimensions vary by configuration, with wheelbase ranging from 99 to 106 inches and operating weight up to 13,135 lbs. Electrical system features a 12-volt negative ground with a 42-amp alternator (61 amps with cab).

Power115 hp[P]

Founded1976 - 1981

ModelHydro 186

International Harvester Hydro 186 tractor

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Technical Specifications

Detailed specifications and technical data for International Harvester Hydro 186

Power

PTO (tested)	105.02 hp (78.3 kW)
PTO (claimed)	104 hp (77.6 kW)
Drawbar (tested)	79.83 hp (59.5 kW)
Drawbar (claimed)	82 hp (61.1 kW)

Tires

Rear tire	18.4-34
Front tire	10.00-16

Engine

Type	diesel
Model	International Harvester D436
Cooling	liquid-cooled
Cylinders	6-cylinder
Rated RPM	2400
Air cleaner	dual dry element
Bore/Stroke	4.30x5.00 inches (109 x 127 mm)
Displacement	436 ci (7.1 L)
Oil capacity	14 qts (13.2 L)
Coolant capacity	26 qts (24.6 L)

Weight

Shipping	11,500 lbs (5216 kg), 12,350 lbs (Hi-Clear) (5601 kg)
Operating	13,135 lbs (5958 kg)

Capacity

Fuel	50 gal (189.2 L), 22 gal (auxiliary) (83.3 L)
Hydraulic system	28.5 gal (107.9 L)

Dimensions

Width	102 inches (259 cm), 98 inches (Hi-Clear) (248 cm)
Length	167 inches (2WD) (424 cm), 163 inches (4WD) (414 cm), 169 inches (Hi-Clear) (429 cm)
Wheelbase	105 inches (266 cm), 101 inches (tricycle front) (256 cm), 99 inches (4WD) (251 cm), 106 inches (Hi-Clear) (269 cm)
Height (cab)	112 inches (284 cm), 125 inches (Hi-Clear) (317 cm)
Ground clearance	13 inches (33 cm), 26 inches (Hi-Clear) (66 cm)

Electrical

Ground	negative
Batteries	2
Battery CCA	470
Battery volts	12
Charging amps	42, 61 (with cab)
Charging system	alternator

Hydraulics

Type	open center, closed center (Optional after late 1980)
Valves	2
Capacity	28.5 gal (107.9 L)
Pump flow	12 gpm (45.4 lpm)

Mechanical

Cab	standard with air-conditioning. Open operator station and four-post ROPS available.
Drive	Two- or four-wheel drive
Brakes	Hydraulic disc brakes
Steering	power assist
Final drives	bull gear

Production

Type	Row-Crop tractor
Series	86 Series
Built in	Rock Island, Illinois, USA
Variants	Hydro 186 Hi-Clear (high clearance)
Original price	$33,900 (1981)
Years produced	1976 - 1981

Transmission

Type	hydrostatic
Gears	variable, two-range forward and reverse
Controls	A range lever on the right console allows the selection of high, low, or reverse range. Speed is controlled by the speed-control lever on the left side of the instrument panel. An inching pedal is located on the left side of the tractor, and allows for small movements when connecting implements.
Oil type	IH Hy-Tran/B-6
Oil capacity	114 qts (107.9 L)

Tractor hitch