Just got a 53 Super M (stage II)and am learning all the differences from the 52s. This one has the live hydraulics with the res. under the gas tank where the battery once was. It has a valve purched on top of where you use to fill the old belly pump. This model has what I assume is a second res. where the old pump once was. Does this valve configuration bypass back into the upper tank as well as a lower tank? Bare in mind this is factory stuff, not some cobbled up job. The valve is loose at the base where it goes into the lower tank, and I need to disassemble all this to tighten things back up. There is no guidence at all in my IT manual for this type set up.