SO... It's been a while, but I finally had some time to work with this steering some today. It was sugessted to check the steering cylinder for internal bypass and it checks OK. I don't have a flow meter, but with the orbital valve return line off at the hydrauilc filter,
RED arrow, the orbital valve is flowing pass through at a reasonable rate without any steering operation. At engine idle, there is not excessive pressure noticed on the open line from the orbital valve draining into a bucket. I suspect low pressure, have a test kit and will do some presure checks after the Holiday. With that line off at the filter, at idle, oil gushed out of the open filtting on the filter housing, 10x the flow rate(and seemingly more pressure) than what is coming from the open orbital valve line. The diagram seems to show a check valve there,
RED circle at arrow. Should there be any oil coming from this open fitting of hydraulic filter housing??
I don't think this is the whole problem, but one step at a time. Thanks!