To many casual users, tractor 3 point linkage pin sizes are a mystery. The three-point hitch is a method of attaching implements (equipment) to tractors.
Below, I have listed what sizes of pins are used on different sizes of tractors this is not entirely accurate as some tractors may go into a higher or lower HP range for the size of linkage :
Category 0 Usually found on large ride on mowers that cross over to the subcompact tractor size.
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16mm - 5/8" Diameter pin both top and bottom.
Category 1 Usually found on sub compact and compact tractors from 16 - 50HP
Category 2 Usually found on tractors 45 - 120HP
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25mm - 1" Top link
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28mm -1-1/8" Lower linkage
Category 3 Usually found on tractors 100HP-225HP
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32mm - 1-1/4" Top Link
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38mm- 1-7/16" Lower Linkage
Linkage pins are usually secured in place with a
Linch pin
Or an R clip
