I suspect rather then operator error in operating the tractor, it was a simply misjudgement on Ramons part. Think about it. Here is a tractor, weighs about 3305lbs. Add a loader, a hoe, all the fluids, and then another 1500 to 2000lbs in the loader bucket when moving dirt and your asking the engine to do many things besides run two hydraulic pumps, a fan, a water pump, an alternator. It will do it, just not as fast as perhaps some may like. Thats about 7000 to 8000 lbs. I guess one of the problems is very few of us have hoes so determining just how much that plays a part in all of this is harder to say. I think the altitude actually plays some part in this contrary to the "dyno" testing at the dealer. At any rate, I think even the
L3830 is going to be less then what he would want. The
L3130 HST is 31 HP net. Torque is 75.9 ft lbs. The
L3830 HST is 37.4 HP net and 89 ft lbs of torque. Jumping up to the
L4330 HST it is 41 HP net and 107.8 ft lbs of torque. The
L5030 HST is 50 HP, 119.8 ft lbs of torque. The Caterpillar D11R is 850 HP net, displacement 2105 cu in. I do not know the torque but it must be OK since the operating weight of the Dozer is 203,100 lbs and you still need to push the dirt. There is no backhoe option. A kelley ripper is available with a ripping depth of about 7'.
Now if it was me and I was in Ramons shoes. I would keep the hoe. Keep the cab if it will fit a larger HP model. Opt for a
L3830 GST and even keep the loader or, sell the tractor and loader, get a
L4330 with loader in HST or GST, put the hoe on it. I would bite the learning curve bullet and then go find a nice happy place.