I'm with Larry and his dedicated loader GT, except that mine has a fabricated perimeter frame, not a tube frame. I'll leave the intricacies of working with a tube frame to Larry other than to say that I, personally, would be more comfortable with a cross member tying the sub frames together under the post mounting pads. As mentioned, I yield to Larry's specific knowledge with tube frames.
I will do some sitting and thinking about a front bumper type setup. Iíve honestly spent more time sitting and staring and thinking about this thing than I have building it.
As it should be of you are going to get it right. The more time spent starring and thinking, the better the possibility of getting the subconscious, with it's unrestricted access to ALL of your memories as opposed to your conscious which has a tenuous access to current and recurring memories, involved in the process. Lessons learned on playground equipment as a child, as well as the lessons in physics class in high school, all have some bearing on FEL development and operation. And we all know what happened to the physics lessons at the start of the next semester. For a general example, look up "The Nothing Box" on youtube.
I'm thinking your front mounts for the diagonals might be too flexible so far out from the frame. I think I might have gone to a full width heavy channel or tube front bumper, and terminated the diagonal forward ends there
I am in agreement with Larry on this. The ends of the diagonal braces have the greatest load imposed on them and you want all the strength that you can get. I prefer square or rectangular tubing over channel, simply because channel has a tendency to twist with unbalanced loading. Since it will not be a case of unbalanced loading unless something breaks, channel works.
I also prefer square tube for the diagonal braces. Pipe is equally strong in all directions, but the corollary is that it equally weak
in all directions, especially when upsetting loads are imposed, such as the bend in the end at the attachment point in the last pic. There is enough compression load on that point to lift the rear of the tractor off of the ground. Think about the ballast load and leverage involved.
All in all, your work is well done, and your thinking process is bang on. Keep it up.
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Sometimes you get on a roll, sometimes the roll gets on you.
MF GC2310, Husqvarna YTH20B42T
Down for Repairs
MF1655 w/ FEL, MF1655, MF12H, MF8H, MF7H
Spending too much time on MTF to work on my toys.