Update... Well I'm back up running and here's what happened which might help somebody else. First I checked the hydraulic oil level which looked about right but since I was on a hill side I overfilled it just to see and everything started working. Then it was time to get the backhoe off the hill and back to my shop. Once at the shop, I lowered the hydraulic oil to the correct level and cleaned that dirty sight glass I've been treating to do for a while
Next it was time to the replace that destroyed serpentine belt. I've found a lot of post about how to take off the front counterweights along with various other front end parts but when I came across someone talking about just loosening the hydraulic pump coupler, sliding it forward on the pump spines where you get just enough space to work in a serpentine belt, I decided to give that a try first.
The sliding of the coupler went pretty well. I did modify a box end wrench with a long weird looking handle from an old tire iron, this made getting the coupler bolts loose in that tight space a lot easier. Slipped the coupler forward, belt went in, loosely started all of the bolts (needle nose pliers worked well for that), then tightened all bolts to torque standards with that weird handy-dandy wrench and I was done in less then 2 hours.
So if someone needs to replace a serpentine belt, I think slipping the coupler forward might be worth a try. Hope this helps!