I have made many drop control orfices from a chunk of a bar or bolt. Only thing is you have to have a nice flat surface at loader cyl or valve end so it will seal . Make small hole in like a quarter inch long piece, wide slot across one side of it so fluid had to go through hole when lowering but lifts plate and goes through slot on other side when raising. IH actually used them in some valves so I just copied. Lot of old combine headers and swather headers dropped like a rock is where I made them for. Have to adjust size of hole to get drop you are comfortable with. Another thing, some of the header control valves on the 715 IH combines were mismanufactured. They had a screw on them to control the rate of drop, but if you turned it in far enough to start slowing the drop it shut off the drop completely. If under warranty, changed the valve, if out of warranty, made an orfice.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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