"All three of these valves have had the signal line opened via a line and screw valve connected a tee fitting at the X port of the compensator valve when the pump was locked on demand to insure there wasn't pressure present, even though there was 0 pressure at the X port of the compensator valve the pump stayed on demand until the engine was shut off"
You have proven something is not right with the pump.
Cut your loses and aggravation and replace it.
Been there and done that, I'm too tired tonight (going to bed) to type out the long version, short version is the compensating valve provides pressure to a piston to overcome a spring and center the swashplate and take the pump "out of stroke".
If due to internal leaks the piston doesn't move when the compensating valve sends pressure/flow to it the pump will remain "in stroke" even though the compensating valve is providing a "destroke signal/flow of oil" yo the destroke cylinder in the pump..
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Today's Featured Article - Ford Super Dexta - by Anthony West. The rusty blue tractor caught my eye as my truck zipped by the farm implement business. It looked so fornlorn amongst the lineup of newer equipment. But it was just the right size for my small farm. I stopped in and asked the proprietor for further information. "It's a 64 Ford Super Dexta", he said. "It's a tough little tractor, although it's a hard starter being a diesel and all." He did manage to get it running, compliments of a can of ether. Once started it putted along pretty good. It
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