Nobody answered the question if I could use a fixed bar to operate as a top link. I did like the chain idea . That will work for a couple implements like the bush hog,
chipper, trailer hitch and maybe snow blower. But not for the winch and rear blade. Think I will,be buying some big chain.
chipper, trailer hitch, winch = very bad idea with chain. your asking for bodily harm
rotatory cutters (name brand = bush hog) = some use chains for allowing rear of bush hog to go up and down a litle bit. but the chain is short. and the chain goes through a pipe. to help prevent the rotatory cutter from flipping back up on you.
snow blower, just seems like bad idea with use of chain and causing it to dig in vs slide over the surface.
i noted "certain areas" of a given task, for a chain. as in only used part of a time to get them through something say rotatory cutting. but then swapped back to a regular top link.
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looking at hydralink and the "air cushion" i don't know about that doing. seem like a lot of jitter jatter and uneven / bumpy finished work, could take place of chain in certain applications i suppose.
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fix length bar can work. it is the bending...
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3pt hitchs are awesome at dragging stuff when driving forward. but they stink when ya turn (can cause lower lift arms to bend), and when driving backwards again damage to 3pt hitch top link and lower lift arms. check chains, check bars, sway bars, sway chains, stay straps. all these bars/chains/straps are there to help limit the 3pt hitch and or protect the 3pt hitch in certain tasks.
sway bars/sway chains highly recommended for rotatory cutter, so the cutter not out in back acting like a large dog tail. swinging back and forth, along with protecting 3pt hitch if you go into a turn with rotatory cutter down, and side swipping something (down tree limb, a good bump, a rock etc...) and causing lower lift arms of 3pt hitch to buckle / bend.
those extra holes around the PTO shaft, around the final drive area that extend out to the tires, and extra holes were the top link fits. are those places to attach the check bars/chains, sway bars/chains, stay straps/bars. manufactures generally only sell/give top link, side link, lower lift arms, and maybe a draw bar with purchase, everything else is optional.