1977 International 686 Tractor Walk Around & Operational Video $24,900
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Years in Production / 1976–1980
International Harvester
686
Explore the specifications, hardware, and original references for the International Harvester 686.
No photo
73hp
Engine estimate · from PTO
2WD Only
Drive
1976–1980
Production years
International Harvester
Manufacturer
686 / 01
At a glance
Overview
1976 - 1980
Production
Original price was $14,700 in 1980
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.
- Manufacturer
- International Harvester
- Total Built
- 6,000
Mechanical
Two-wheel drive
Power steering
Disc brakes
Two-post fixed ROPS.
Capacity
- Fuel
- 31 gal117.3 L
- Hydraulic System
- 16 gal60.6 L
Hydraulics
- Type
- open center
- Capacity
- 16 gal60.6 L
- Total Flow
- 12 gpm45.4 lpm
Hitch
- Rear Type
- II
Pto
- Rear Pto
- independent
- Rear Type
- 540 (1.375)
686 / 02
Under the hood
Engine Detail (Option 1)
International Harvester D310
diesel
6-cylinder
liquid-cooled
German (Nuess) built diesel that replaced the 312 diesel in 1979.
- Displacement
- 310 ci5.1 L
- Bore Stroke
- 3.875x4.375 inches98 x 111 mm
- Rated Rpm
- 2000
- Starter Volts
- 12
- Fuel Type
- diesel
- Cylinders
- 6
- Cooling
- liquid-cooled
Engine Detail (Option 2)
International Harvester D-312
diesel
6-cylinder
liquid-cooled
- Displacement
- 312 ci5.1 L
- Bore Stroke
- 3.875x4.410 inches98 x 112 mm
- Air Cleaner
- dry
- Rated Rpm
- 2000
- Idle Rpm
- 900-2000
- Oil Capacity
- 12 qts11.4 L
- Coolant Capacity
- 21 qts19.9 L
- Fuel Type
- diesel
- Cylinders
- 6
- Cooling
- liquid-cooled
Engine Detail (Option 3)
International Harvester C291
gasoline
6-cylinder
liquid-cooled
- Displacement
- 291 ci4.8 L
- Bore Stroke
- 3.75x4.39 inches95 x 112 mm
- Rated Rpm
- 2000
- Fuel Type
- gasoline
- Cylinders
- 6
- Cooling
- liquid-cooled
Engine Options
International Harvester 5.1L 6-cyl diesel
International Harvester 4.8L 6-cyl gasoline
686 / 03
Gears & controls
Transmission
- Transmission
- Torque Amplifier
- Transmission Type
- two-speed power shift
- Gears
- 10 forward and 2 reverse
- Oil Capacity
- 64 qts60.6 L
- Speeds Description
- With 15.5-38 rear tires.
International Harvester686 Transmission
10-speed two-speed power shift
686 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 162 in411 cm
- Width
- 89.4 in227 cm
- Height
- 105 in266 cm
- Wheelbase
- 103 in261 cm
- Front tread
- 58 in147 cm
- Rear tread
- 56 in142 cm
Dimensions And Tires
- Wheelbase
- 103 inches261 cm
- Weight
- 7770 lbs3524 kg
- Front Tire
- 7.50-16
- Rear Tire
- 15.5-38
Tires And Tracks
- Front Ag
- 7.50-16
- Rear Ag
- 15.5-38
See it in action
Videos
Watch International Harvester 686 videos from their original YouTube creators.
686 / 06
Tests (NTTL)
Tractor Tests
NTTL 1151: 312 diesel Torque Amplifier 2WD
NTTL 1152: gasoline Torque Amplifier 2WD
NTTL 1336: 310 diesel Torque Amplifier 2WD
Nebraska Tractor Test 1151
312 diesel Torque Amplifier 2WDNovember 3 - 14, 1973
PTO performance
Drawbar performance
Gear 3-Direct used for power test.
Gear 2-TA used for pull test.
- Id
- 1151
- Power At Rated Engine Speed
- 66.29 hp49.4 kW
- Fuel Use
- 4.7 gal/hour17.8 l/hour
- Fuel Use
- 4.6 gal/hour17.4 l/hour
- Max Power
- 58.01 hp43.3 kW
- Max Pull
- 8,012 lbs3634 kg
Nebraska Tractor Test 1152
Gasoline Torque Amplifier 2WDNovember 5 - December 3, 1973
PTO performance
Drawbar performance
Gear 3-Direct used for power test.
Gear 2-TA used for pull test.
- Id
- 1152
- Power At Rated Engine Speed
- 66.30 hp49.4 kW
- Fuel Use
- 12.0 gal/hour45.4 l/hour
- Fuel Use
- 5.7 gal/hour21.6 l/hour
- Max Power
- 57.29 hp42.7 kW
- Max Pull
- 7,981 lbs3620 kg
Nebraska Tractor Test 1336
310 diesel Torque Amplifier 2WDMarch 26 - April 16, 1980
PTO performance
Drawbar performance
Gear 3-Direct used for power test.
Gear 1-Direct used for pull test.
- Id
- 1336
- Power At Rated Engine Speed
- 66.36 hp49.5 kW
- Fuel Use
- 4.1 gal/hour15.5 l/hour
- Max Power
- 57.71 hp43.0 kW
- Max Pull
- 8,013 lbs3634 kg