After watching the video a few times I suspect the main hydraulic pump is the issue. Pressure certainly is all over the map.
When you switch the display to pump 2 pressure, the max pressure when I assume the boom was at full height was the same pressure while the boom was in motion.
If it was mine ,I would remove the main pump and remove the rear housing.
I expect you are going to find some heavy inconsistent wear on the rear housing where the 2 valve plates contact and slide and also heavy wear on both valve plates causing internal leaks that vary in size depending what position the valve plates are in.
Thank Diesel Dave for the input...So, I just want to make sure this is explained well, the function I was performing was boom up, hold till main relief lifts which is set at 35mpa. In the beginning of the video on pump 1 delivery pressure, it reached and functioned correctly when I lowered the boom and attempted to perform the same function again it stops around15-20mpa. Then I switched the display to pump 2 delivery pressure and the readings were the same 15-16mpa. These reading were consistent while performing any function even when pinning the tracks out and isolating the pumps independently.
I am sure there is wear on the pump given the hours but supposedly the pump has 4k hours on it. When the machine makes its way back to the dealer, I may have them check it (if I don't figure it out by then or find another pump). BUT its hard to hear on the video but when its building pressure and stops at the 16-20mpa mark, while on the machine it sounds like it dumps the pressure as if the machine thinks you have backed off on the function. What could be possible areas of the machine dumping or I guess bypassing the pressure.
