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     The Big Book of Farmall Tractors
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    International Harvester 686

    International Harvester 686 tractor photo  I&T Manual: IH 544, 656, 666, 686, 684, 784, 884, 1466, 1468, 1486, 1568, 1586, Hydro 70, 84, 86, 100, 186
    I&T Shop Manual
    1976 - 1980
    Previous model:International Harvester 666





    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.
     

    Production:

    Manufacturer:International Harvester
    Total built:6,000
    Original price (USD):$14,700 (1980)
     

    International Harvester 686 Engines:

       International Harvester 5.1L 6-cyl diesel
       International Harvester 4.8L 6-cyl gasoline
    full engine details ...
     

    Capacity:

    Fuel:31 gal [117.3 L]
    Hydraulic system:16 gal [60.6 L]
     

    3-Point Hitch:

    Rear Type:2
     

    Power Take-off (PTO):

    Rear PTO:independent
    Rear RPMs:540
     

    Dimensions & Tires:

    Wheelbase:103 inches [261 cm]
    Weight:7770 to 10340 pounds
    Front tire:7.50-16
    Rear tire:15.5-38
    full dimensions and tires ...
     

    686 Serial Numbers:

    Location:Clutch housing on right side.
    1976: 7500
    1977: 7729
    1978: 9899
    1979: 11417
    1980: 12923

    how to read serial numbers...

     

    International Harvester 686 Power:

    Drawbar (tested):58.01 hp [43.3 kW]
    PTO (tested):66.36 hp [49.5 kW]
    power test details ...
     

    Mechanical:

    Chassis:4x2 2WD
    Steering:hydrostatic power
     

    Hydraulics:

    Capacity:16 gal [60.6 L]
    Total flow:12 gpm [45.4 lpm]
     

    Battery:

     

    Page information:

    Last update:September 26, 2012
    Copyright:Copyright 2012 TractorData LLC
    Contact:Peter@TractorData.com
    Copyright 2000-2012 - TractorData LLC. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.