Are you thinking about the width? I don't think the length changes. Our 3930 swings enough to accommodate Cat 1 or Cat 2. ……
I am not addressing width. I am addressing the Length of the lower lift (draft) links …the distance between the ball-centers on ONE arm. I’ve measured that distance on new tractors on a dealer-lot… The Cat II tractor (clearly a utility tractor) has lift arm length c-t-c of 32”.…. while the compact tractor carrying a Cat I hitch has lift arms only 28” c-t-c.
My own utility tractor (M4700DT) has a
convertible hitch … the lift arms can be reversed to serve either a Cat I or a Cat II implement. (one ball is Cat I and the other Cat II w/bushing… while the differential case has a Cat I lower-pin so the arm can be reversed. While I only use Cat I implements (so far…and this part of the discussion is not germane to the issue of replacing my lower lift arms with telescoping arms … I would like to retain the ability to use a Cat II implement should the need arise.)
My basic problem is finding lower lift arms which telescope…and will fit my M4700…. being of comparable length to my existing Non-telescoping arms …so as to maintain compatibility with existing implement set-ups.
Hodge has suggested a solution which has worked for him…. but I believe he has a compact tractor limited to Cat I. The solution he suggests is a KIOTI telescoping-lift-arm “kit”. So I stopped by a KIOTI dealer and took measurements off their lift arms. On their lot they have only ONE Cat II hitch tractor, a RX6620 which has telexcoping lift arms, which measure 32”.
The Cat I tractors on their lot (all compact tractors) have lengths of 28”.
The problem I’m facing is the possibility that if I order the “kit” Hodge suggests…. I may find I own $500 worth of lift arms which are too short (when not extended).