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3 Point Linkages what you need to know , useful Information about tractor linkages

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.

  • 16mm - 5/8" Diameter pin both top and bottom.   

Category 1   Usually found on sub compact  and compact  tractors  from 16 - 50HP

  • 19mm - 3/4"  Top Link,  Top Link Pin cat 1


  • 22mm - 7/8"  Lower linkage 

Category 2  Usually found on  tractors 45 - 120HP

  • 25mm - 1"  Top link   

  • 28mm -1-1/8" Lower linkage

Category 3  Usually found on tractors 100HP-225HP 

  • 32mm - 1-1/4" Top Link 

  • 38mm- 1-7/16"  Lower Linkage

Linkage pins are usually secured in place with a


Linch pin

Or  an R clip