Finally got the machine into the shop and looked at. Pressure tested below specs, and appeared someone attempted to shim it up. Tech said it appeared someone had got it real hot because the seals where all brittle. Turns out it was the tandem pump
I have a 2002 40XT 3581 hrs, that just stops when under a load and both control arms are being used. I pushed against a tree to test what is happening. When you push both control arms forward against a tree, the tires will not spin or even attempt to spin. If you push only the right control arm...