I have an NR4500 S/N 7NR3548715. The operator complains that the steering takes off on its own the opposite direction of command. He says the problem happens a few times per day. I have not witnessed it occurring even with excessive test driving. I have swapped out every steering component including: The EPS controller, display, steer input encoder, steer motor complete and the steer sensors on the frame. The frame is free of stray voltage other then the leakage from the brand new battery. Static straps good. Any ideas?
FYI unit has complete Zapi system
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