Tractor · 1976Unverified
International Harvester 686
International Harvester 686 · 66 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
66 hp
Max power
43.3 kW
Weight
3524 kg
Hover a source tag to verify
Overview
ManufacturerInternational HarvesterReference
Total built6,000Reference
Original price was $14,700 in 1980Reference
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.Reference
Two-wheel driveReference
Power steeringReference
Disc brakesReference
Two-post fixed ROPS.Reference
Engine
International Harvester 5.1L 6-cyl dieselReference
International Harvester 4.8L 6-cyl gasolineReference
Drawbar (tested)43.3 kWReference
International Harvester D310Reference
dieselReference
6-cylinderReference
liquid-cooledReference
German (Nuess) built diesel that replaced the 312 diesel in 1979.Reference
Displacement5.1 LReference
Bore/Stroke98 x 111 mmReference
Rated RPM2000Reference
Starter volts12Reference
International Harvester D-312Reference
Displacement5.1 LReference
Bore/Stroke98 x 112 mmReference
Air cleanerdryReference
Idle RPM900-2000Reference
Oil capacity11.4 LReference
Coolant capacity19.9 LReference
International Harvester C291Reference
gasolineReference
Displacement4.8 LReference
Bore/Stroke95 x 112 mmReference
Power at rated engine speed49.4 kWReference
Max power43.3 kWReference
Power at rated engine speed49.4 kWReference
Max power42.7 kWReference
Power at rated engine speed49.5 kWReference
Max power43.0 kWReference
Transmission
10-speed two-speed power shiftReference
TransmissionTorque AmplifierReference
Typetwo-speed power shiftReference
Gears10 forward and 2 reverseReference
Oil capacity60.6 LReference
PTO & Hydraulics
PTO (tested)49.5 kWReference
Hydraulic system60.6 LReference
Typeopen centerReference
Capacity60.6 LReference
Total flow45.4 lpmReference
Rear TypeIIReference
Rear PTOindependentReference
Rear PTO Type540 (1.375)Reference
Capacities
Fuel117.3 LReference
Dimensions
Wheelbase261 cmReference
Weight3524 kgReference
Front tire7.50-16Reference
Rear tire15.5-38Reference
Ag front7.50-16Reference
Ag rear15.5-38Reference
Length411 cmReference
Width227 cmReference
Height (exhaust)266 cmReference
Diesel Shipping weight3524 kgReference
Ballasted weight4690 kgReference
Front tread147 to 208 cmReference
Rear tread142 to 243 cmReference
686 Serial Numbers
Location:Clutch housing on right side.Reference
19767500Reference
19777729Reference
19789899Reference
197911417Reference
198012923Reference
FAQ: How to read a serial number table.Reference
Test results
NTTL 1151: 312 diesel Torque Amplifier 2WDReference
NTTL 1152: gasoline Torque Amplifier 2WDReference
NTTL 1336: 310 diesel Torque Amplifier 2WDReference
312 diesel Torque Amplifier 2WDNovember 3 - 14, 1973Link: Nebraska Tractor Test 1151 fileReference
PTO performanceReference
Fuel use17.8 l/hourReference
Drawbar performanceReference
Fuel use17.4 l/hourReference
Gear 3-Direct used for power test.Reference
Max pull3634 kgReference
Gear 2-TA used for pull test.Reference
Gasoline Torque Amplifier 2WDNovember 5 - December 3, 1973Link: Nebraska Tractor Test 1152 fileReference
Fuel use45.4 l/hourReference
Fuel use21.6 l/hourReference
Max pull3620 kgReference
310 diesel Torque Amplifier 2WDMarch 26 - April 16, 1980Link: Nebraska Tractor Test 1336 fileReference
Fuel use15.5 l/hourReference
Max pull3634 kgReference
Gear 1-Direct used for pull test.Reference
Speeds
With 15.5-38 rear tires.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.