re looking at image, i see no.....
stabilizer arms
draw bar
swinging draw bar
stay straps.
i thought goal of stabilizer arms or stabilizer chains. were to allow force to be transferred back near the tires. vs all weight being placed on the PTO casing. so if you did hit something. the implement would not crack lifting arms but rather transfer the force.
the other stuff, really not needed. but stabilizer arms?
================
on another note as mcd176 noted. SCUTs and CUTs are they really made for abuse? smaller and smaller frame sizes compared to older tractors of same HP. even newer tractors of same HP but difference in weight class. weight has to come from some were, i would assume from the frame and thickness and strength of the metal parts of the tractor.
but are SCUTs and CUTs following cars and trucks? meaning cars/trucks use to be metal, now cheap easy to break and crack plastic. is the reduce in frame size and strength there of starting to show? or is it that so many tractors are out there. things eventually happen. and what folks see, is just a very small percentage?
===============
i would say i am abusive to tractors, and run them to there very limit in both weight and HP and traction at times. i suppose eventually i will end up bending something or cracking something sooner or later. (hopefully later) but i doubt it will stop me from repeating similar things.
==============
*rubs chin* rotatory cutters, can get some good old sway in them, box blades rippers can put a pretty good crank / twist on the lifting arms if the outside ripper hit a good rock or root. rear blades one can easily hit a side walk or other concrete structure or what not, and put a lot of extra forces on the 3 pt lift arms.
the lift arms are just simple flat metal with perhaps a couple bends in them. they are not Square tubing, I beams, H beams, etc... and there can be some "sway" in the arms. allowing the arms to give a much better yank at the PTO casing.
majority of tractors with 3pt hitch, with the bigger frame (not riding lawn mower frames) i tend to see a pin or hole or spot up near axle just beside the inside of the rear wheels. so the stabilizer arms can be placed on. so when you do hit something and causes side forces on the implement. the weight is transferred to the PTO casing but also to the rear axle casings (final drive hosing).