Hydroboost issue

[Hydratech®]

Looking at your pictures again, I see another problem - you have a PS filter installed. That's great, but these can cause a restriction to flow, which can back pressure the low pressure return lines you have plumbed at the steering gear (before the filter). If you want to give it a shot, you could install a T fitting AFTER the PS filter - between the filter and the pump's return line nipple - that may also clear up your issue without having to install the additional return line connection on your PS pump housing. Do also note that Borgeson has PS pumps that have two low pressure return line nipples for use with hydroboost:



https://www.borgeson.com/xcart/produ...productid=1716

Their flow rates are a bit high though, as we prefer to see 2.2 - 2.6 GPM (gallons per minute)