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International Harvester 686
The
International Harvester 686 is a 2-wheel drive farm tractor. This model was
manufactured between 1976 and 1980. The International Harvester 686 is equipped
with a 5.1L D-312 four-stroke six-cylinder direct injection liquid-cooled diesel
engine rated at 73 hp (54.1 kW), or 4.8L C-291 four-stroke six-cylinder gasoline
engine rated at 72 hp (53.7 kW).
The Torque Amplifier transmission consists of a dry clutch and 2-speed
powershift gearbox with 10 forward and 2 reverse gears. Max. forward
speed - 16.4 mph (26.4 km/h), max. reverse speed - 2.9 mph (4.7 km/h).
The open center hydraulic system includes a gear pump with fluid flow
rate of 12 gal/min (45.5 l/min). The hydraulic pressure is 172 bar (2500
psi). The International Harvester 686 was equipped with a hydrostatic
steering system, mechanical disc brakes, 7.50x16 front tires, and
15.5x38 rear tires. The wheelbase is 103 inches (2610 mm).
| Engine Model |
International Harvester D-312 |
| Engine Type |
4-stroke, six-cylinder diesel |
| Number of Cylinders |
6 |
| Displacement, cu in (L) |
312 (5.10) |
| Engine Bore, in (mm) |
3.88 (98.0) |
| Engine Stroke, in (mm) |
4.41 (112.0) |
| Aspiration |
Natural |
| Rated Engine Power, hp (kW) |
73.0 (54.1) |
| Rated Engine Speed, rpm |
2000 |
| Compression |
17:1 |
| Firing Order |
1-5-3-6-2-4 |
| Fuel System |
Direct injection |
| Fuel Tank Capacity, gal (L) |
31.0 (117.3) |
| Oil Capacity, qts (L) |
12.0 (11.4) |
| Coolant Capacity, qts (L) |
21.0 (19.9) |
| Electrical System Rating, Volts |
12 |
| Engine Model |
International Harvester C-291 |
| Engine Type |
4-stroke, six-cylinder gasoline |
| Number of Cylinders |
6 |
| Displacement, cu in (L) |
291 (4.80) |
| Engine Bore, in (mm) |
3.75 (95.0) |
| Engine Stroke, in (mm) |
4.39 (112.0) |
| Rated Engine Power, hp (kW) |
72.0 (53.7) |
| Rated Engine Speed, rpm |
2000 |
| Compression |
7.5:1 |
| Air Cleaner |
Dry elements |
| Fuel Tank Capacity, gal (L) |
31.0 (117.3) |
| Electrical System Rating, Volts |
12 |
| PTO Operational Type |
Independent |
| PTO Horsepower, hp (kW) |
66.3 (49.2) |
| PTO Clutch Type |
Dry disc |
| PTO Speeds, rpm |
540 |
| Transmission Type |
Torque Amplifier |
| Gearbox Type |
10F/2R, 2-speed powershift |
| Number of Forward Gears |
10 |
| Number of Reverse Gears |
2 |
| Clutch Type |
Dry disc |
| Oil Capacity, qts (L) |
64.0 (60.6) |
| Maximum Forward Speed, mph (kph) |
16.4 (26.4) |
| Maximum Reverse Speed, mph (kph) |
2.9 (4.7) |
| Drive Wheels |
2WD 4x2 |
| Steering Configuration |
Front Steer |
| Steering System |
Hydrostatic power |
| Brakes Type |
Mechanical disc |
| Front Tire Size |
7.50-16 |
| Rear Tire Size |
15.5-38 |
| Front Tread, in (mm) |
58-82 (1470-2080) |
| Rear Tread, in (mm) |
56-96 (1420-2430) |
| Hydraulic System Type |
Open Center |
| Implement Pump Type |
Gear |
| Implement Pump Flow, gpm (Lpm) |
12.0 (45.5) |
| Hydraulic Pressure, Bar (psi) |
172 (2500) |
| Hydraulic Fluid Capacity, gal (L) |
16.0 (60.6) |
| 3-Point Hitch Category |
2 |
| Wheelbase, in (mm) |
103 (2610) |
| Length, in (mm) |
162 (4110) |
| Height (Exhaust), in (mm) |
105 (2660) |
| Overall Width, in (mm) |
89.4 (2270) |
| Weight (Shipping), lb (kg) |
7770 (3525) |
| Weight (Ballasted), lb (kg) |
10340 (4690) |
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| Farm Tractors Technical Specifications |
