Hey Forkinlift
Ok at this point we have replaced the controller and both encoder bearings you were right the left drive motor bearing failed, we also replace the interface board and wire harness on the recomendation of the local jung tech, he said the new controllers have gone from 5v refrence to 10v.
So at this point we have all the parts in and the truck powers up but we get two codes and it will not run, 1st code is # 39 2nd one is 81.
We have an apointment to have a tech come out and program the truck any info you could pass on would be great.
Cheers mate.