International Harvester 686

Last Updated: June 2024

Overview

The International Harvester 686 is a utility tractor that was produced from 1976 to 1980. It comes equipped with a choice of three engines: a 5.1 L, six-cylinder diesel engine with either 310 or 312 cubic inches of displacement, or a 4.8 L, six-cylinder gasoline engine with 291 cubic inches of displacement. This tractor features a two-speed power shift transmission with 10 forward and 2 reverse gears. The 686 model includes power steering, a liquid-cooled engine, disc brakes, a two-post fixed ROPS cabin, and an independent rear PTO. It has a hydraulics system with an open center type. With a wheelbase of 103 inches, and weighing 7770 lbs unballasted, this tractor is designed for a variety of utility tasks on the farm.
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Key Specifications

Category: Utility

Transmission: Two-speed power shift

Drive Type: 2WD

Operating Weight: 7770

Fuel Type: Diesel / Gasoline

International Harvester 686 vs. Similar Tractors

Operating Weight
Average
Greater than 56% of similar tractors.

Technical Specifications

Engine

Manufacturer
International Harvester
Model
D310 / D312 / C291
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Diesel / Gasoline
Induction Type
Natural
Cylinders
6
Displacement (ci)
310 / 312 / 291
Bore (in)
3.875 / 3.75
Stroke (in)
4.375 / 4.39 / 4.41
Rated RPM
2000
Power Output (hp)
-

Transmission

Type
Two-speed power shift
Forward Gears
10
Reverse Gears
2
Total Gears
-

Dimensions

Length (in)
162
Width (in)
89.4
Height (in)
105
Operating Weight (lb)
7770

Power Take-Off (PTO)

PTO Type
Independent
PTO Speed 1 (rpm)
540
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
Power
Coolant Capacity (qts)
21
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
1980
Hitch Type
Three-Point Hitch
Hitch Category
II
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
Two-post fixed ROPS
Starter Type
Electric
Brake Type
Disc
Hydraulic System Type
Open center

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