3 Point Linkage Compact Tractor CAT 1. This 3 point linkage kit is to convert most sub 25hp compact tractors into a cat 1 standard fitment. The kit includes all the equipment you need to set up a 3 point linkage to a smaller compact tractor. CAT 1 – 19mm top links. CAT 1 – 22mm bottom links. We know that this fits older Kubotas up to 22HP mainly 1500 B1700 B1750 and 2150 Older Isekis mainly 2140 and 2160. (ALWAYS INSPECT DRAWINGS TO ENSURE IT WILL FIT YOUR MACHINE). Please be aware lower link balls may require some freeing off. E lubrication and maybe some heat. Any questions give ECS a call on 01904 942096. VAT invoice can be provided. Check out our shop for a wide range of hardware, tools, garden machinery spares, consumables and more. Elvington Country Store – Elvington, YORK.