Seriously?????? we spent 3 hours on this stuff on Friday oh thats right you where in a food coma
I agree usually it is trash or air.Trash in the valves, trash in the unloader, stopped up water filter, and possibly a leak on the inlet hose to pump..
I finally figured it out. One of the bolts had come out of my pump and the adjustment plate came off. So when it was in bypass it ran fine but under load the belt was slipping. The way the Hydrotek is designed you have to unbolt it from the floor and lift it up to see it so I never knew. The whole pump mounted to the bottom of the skid sucks. It is not a service friendly skid! Live and Learn!!