Turns out the return hose was in rough shape, and when the hydraulic fluid got hot, would collapse. Took it off and replaced it with a reinforced 1" ID hot tub hose from home depot. Getting it on was a bit of a bear, but it's on and worked like a champ.
There's a round orange thing that I don't know what it is. If anyone could identify it, that would be great.
The old hose:
The round orange thing:
There's a round orange thing that I don't know what it is. If anyone could identify it, that would be great.
The old hose:
The round orange thing: