I've seen similar problems on many of the older IH hoes - with and without the extendable boom. IH backhoes with the dual hydraulic systems are different from any other backhoe I've ever worked on.
I've got a 3414 right now, with a 3120 backhoe. When it gets hot, the boom won't raise unless I pull steady on the swing lever. They are supposed to be two totally separate systems each with their own pumps - yet holding onto the swing forces the boom to work.
I suspect your problem is not because of hoses hooked wrong (but they may be also). I suspect that one of your pumps is bad, and/or you've got a bad check-valve somewhere. 3514 tractor uses one pump just for the power steering AND swing/stabilizers on the hoe. The other pump runs the front loader and all other functions on the backhoe. If one pump is bad, or, a check-valve goes bad letting oil from the swing-stabilizer circuit leak into the boom-curl-bucket circuit, you get some very strange problems like you've described.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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