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International Harvester 686

International Harvester 686 tractor
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The International Harvester 686 is nearly identical to the IH 666, it was simply renamed when the 86 series arrived in 1976. One major change did occur in 1979, when the 310 diesel replaced the 312.
International Harvester 686IH 686tractor specsfarm tractor5.1L diesel4.8L gasoline10-speed power shift73.7 hp
Power73 hp[P]
Founded1976 - 1980
Model686

Technical Specifications

Detailed specifications and technical data for International Harvester 686

Power

PTO (tested):66.36 hp (49.5 kW)
Drawbar (tested):58.01 hp (43.3 kW)

Tires

Ag rear:15.5-38
Ag front:7.50-16

Engine

Engine options:International Harvester 5.1L 6-cyl diesel, International Harvester 4.8L 6-cyl gasoline
Idle RPM D-312:900-2000
Rated RPM C291:2000
Rated RPM D310:2000
Rated RPM D-312:2000
Bore/Stroke C291:3.75x4.39 inches (95 x 112 mm)
Bore/Stroke D310:3.875x4.375 inches (98 x 111 mm)
Air cleaner D-312:dry
Bore/Stroke D-312:3.875x4.410 inches (98 x 112 mm)
Displacement C291:291 ci (4.8 L)
Displacement D310:310 ci (5.1 L)
Displacement D-312:312 ci (5.1 L)
Oil capacity D-312:12 qts (11.4 L)
Starter volts D310:12
Coolant capacity D-312:21 qts (19.9 L)
International Harvester C291:gasoline, 6-cylinder, liquid-cooled
International Harvester D310:diesel, 6-cylinder, liquid-cooled, German (Nuess) built diesel that replaced the 312 diesel in 1979
International Harvester D-312:diesel, 6-cylinder, liquid-cooled

Capacity

Fuel:31 gal (117.3 L)
Hydraulic system:16 gal (60.6 L)

Dimensions

Width:89.4 inches (227 cm) Minimum width
Length:162 inches (411 cm) Overall length with 3-point hitch
Wheelbase:103 inches (261 cm)
Rear tread:56 to 96 inches (142 to 243 cm)
Front tread:58 to 82 inches (147 to 208 cm)
Years produced:1976 - 1980
Ballasted weight:10340 lbs (4690 kg)
Height (exhaust):105 inches (266 cm)
Diesel Shipping weight:7770 lbs (3524 kg)

Hydraulics

Type:open center
Capacity:16 gal (60.6 L)
Total flow:12 gpm (45.4 lpm)

Mechanical

ROPS:Two-post fixed ROPS
Drive:Two-wheel drive
Brakes:Disc brakes
Steering:Power steering

Production

Notes:The International Harvester 686 is nearly identical to the IH 666, it was simply renamed when the 86 series arrived in 1976. One major change did occur in 1979, when the 310 diesel replaced the 312.
Total built:6,000
Manufacturer:International Harvester
Original price:$14,700 in 1980
Years produced:1976 - 1980

Transmission

Type:two-speed power shift
Gears:10 forward and 2 reverse
Oil capacity:64 qts (60.6 L)
Transmission:Torque Amplifier

Tractor hitch

Rear Type:II

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540 (1.375)

Related Models

International Harvester 666

Model:666