Hydraulic issue 4530 with loader

I have a 4530 with FEL and I recently added rear auxallaty ports from a donor tractor. Installed and now the system is faulty. But not sure to what. It's like some line is not returning or the pump is not working. There is a 2" or so rubber hose on passenger side that feeds to the back of the pump. It is sucking down like sucking air and penching semi closed. The lines have been checked and nothing looks to be mounted in the wrong spot.
 
Top