Hey so I go out to blow some snow and my Pto doesn’t turn on. Then 30 min into clearing snow with the loader the tractor stops and I have no fwd or reverse in any range. Loader, power steering, remotes and 3 point hitch all function like normal. Fluid is full and clean. It’s a 2008 Montana R3644HST. Has anyone encountered this issue? Is there a way to test the hydrostatic pump without splitting the tractor? Or a way to diagnose before I take it apart? Thanks