To me it sounds like the PB outlet is deadheaded by something down stream but the backhoe says otherwise.That sounds a lot like the fault lies within the spool valve.
If the spool in tje 3rd function is in neutral none of that matters.I'm willing but am losing light tonight so it will be tomorrow. I know where the tank hose connects to the backhoe, but not where to connect it directly to the tank. Any advice would be appreciated.
On thinking a bit more, I suppose the place is where the other backhoe hose connects to the body of the tractor, somewhere down below.
Here's a question. I have an adjustable restrictor in the line from the 3rd func valve to the connectors on the front of the tractor for my snowplow. I don't see how that could interfere, but I bring it up because the degree of restriction hasn't been consistent.
Please, keep this as direct as possible. Adding the backhoe simply complicates things snd adds variables.I wasn't thinking that removing the backhoe leaves the lines to be connected easily - biting head to tail for both the tractor lines and the backhoe whips, something you do when you take the hoe off. I have never taken this backhoe off before, but I know in general how to do it. Might as well go on and get the experience because I am thinking of buying or renting a box blade to fix some gravel paths between horse pastures. I have a backhoe dolly made for my previous tractor's 3-point hoe that should work OK for this one.