IH 3600a (656 Hydro Trans) No charge pressure

Hi there! I've posted before but figured I'd provide an update.

I've got a 3600a TLB that just won't go into reverse and the hydraulics are sluggish. I ran a bunch of tests but most recently I've discovered that there doesn't seem to be any charge pressure ~AT ALL~ coming out of the multi-valve. I was under the impression that the machine wouldn't go forwards OR backwards without charge pressure so it's a bit confusing to me.

I opened up the multi-valve hoping to find some obvious clog, but alas - nothing. Anything else I can take a look at? I'm dreading the idea of splitting the tractor as I don't have a garage and doing it safely might prove to be difficult.

Would love some thoughts of things to check. I have all the manuals so please reach out if you are interested. I'm happy to forward manuals if you'd like to take a look.

Appreciate it!
 

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