Thanks to all of those that replied. If I could figure out the nomenclature, would really be helpful.
Yeah the tractor is 40+ years old and has never had any repairs to engine or powertrain, other than starter and possibly an alternator. I did put new hydraulic value control on and it still acted the same. I do have a hydraulic pressure gauge, if I can find it. It was one of those things I bought a few years ago in case I needed it. I changed the hydraulic oil about a year ago.
Since the 3 point hitch works fine, I will first start with the main supply line to loader. David Brown has a peculiar system to operate the loader. There is a flow control value that the operator has to flip with his left hand, just below the seat, on the side of the casting. To operate the 3 point hitch the value has to be flipped in the other direction. The 3 point and FEL can't be used at the same time. My dad bought the tractor new and it has a DB loader. That setup never seemed right to me. Surely, that is not normal? I would like to change that if I could. I don't know anything about hydraulic. I just tinker around until I fix it. Only know I fix it when it works right. Sometimes, I am not even sure what I did.
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