I wasted another half a day on the colossal waste of time and money: I was able to map the flow from the case drains back to the reservoir. There is a poppet in the block that both case drain lines connect to. I was able to determine that the pressure required to open the poppet is approximately 20 psi. the connection block was clean and free from any obstruction. I then measured how much pressure was required to force air back through the case drain/return at the motor, which was just a little over 20 psi. However, when I monitor the pressure in the case drain/return circuit, it quickly reaches 100 psi or over when I put a load on either wheel motor. I was able to test them individually by venting the case drain to an empty jug on one while testing pressure on the case drain on the other. There doesn't seem to be any difference from one side to the other, so it seems the motor with the new geroler is behaving similar to the other, so at this point, i guess either both wheel motors are good or both are bad, although I guess I find it hard to believe that both are bad, considering that one had all new guts inside it. so, there does not appear to be any great restriction in the case drain/return circuit. takes a little over 20 psi to establish flow back to the reservoir. things I know at this point: the seal between the wheel motor and the chain case is only rated at 10 psi unable to find information on what psi the bobcat OEM seal is rated at. there is at least 100 psi on the drain circuit when under load Without any spec to go on, and no one else seems to have any idea what else to try(including a bobcat mechanic) and have no desire to waste any more time and or money, I think I am going to try to sell it as a basket case. too bad, cause it really runs well and I have stuck a stupid amount of money, parts, and labor into it over the last couple of years and haven't gotten more than a couple of hours of use out of it. I hate to say it, but I think it is time to give up.
