Looking for those experienced with 853H hydraulics

[mike11]

Here’s what I have going on, after finally getting my machine to lift as it should by replacing the main PRV. It now leave some unanswered questions bobcat themselves can’t answer. The original prv was a dual unit with a line going to the hv select valve, that is no longer available, the one available and to be used as per bobcats parts site and to my serial number is a single standard prv. The line going is now plugged and machine works fine, however, can I still use my HF, if not what do I need to do??? Looking at the hydraulic schematic it does look like it’s all tied together. The line highlighted is the one now capped, what was that for ??My thoughts are if needed I can T coming right off the HF pump outlet and go through a prv and also T in the dump before the filter, which would protect the HF side
But according to the schematic the HF has its own prv and vents to tank as seen in the attached pic. I want to kinda clear this up so I don’t bust anything

Thanks guys