Interesting problem and I have no direct experience to bring to bear, but couldn't resist a comment. Even though it has two separate systems, the situation you describe shows that they are not truely independant. The weak response after the system gets good and hot suggests that a valve is sticking open or leaking somewhere in the system. Since it returns to full power when the swing system is being activated, it must be impacting the other system by either applying a back pressure to reduce pressure or increasing pressue in some manner that makes the faulty valve work. I'd look for a place to insert two pressure gauges into the two circuits and watch the behavior as it warms up. I'd pay particular attention to the pressure relief valves, and see if there is one that could be leaking, but could be affected by back pressure from the other circuit. Perhaps both circuits share a common return to the sump from the relief valves. A detailed hydraulic schematic would sure help. good luck and report back what you find.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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