Thanks Kevin,

So far I have blown the radiator out, as it was pretty stopped up. I then drained the transmission fluid. I changed the filter and filled trans to capacity with J20C Hydraulic oil as per operator manual. Fluid that was drained did not look bad and had no signs of metal. I cleared the codes. I did not see a drop in the pressure after all this. I did not see where the pressures could be changed. I went through all of the menus. I did see that you could adjust the inching valve. I did not want to mess with that though because I don't have the specs. So far it has been a week and the customer has not called. If I do get called back out, my next step will be swapping the valves as you suggested. Thanks again for the input.