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(ET) Re: Hot shunt



/"It has been reported that some E20 tractors have developed overheated current sensing shunt plates (lower control panel). Indications are "chattering" of the FW relay or loss of the top three throttle speeds in the forward direction. In severely heated cases, the drive motor won't start in forward or reverse even though the controls can be heard to pick up in normal fashion. An examination of the shunt plate should be made for evidence of overheating. If "warping" or discoloration is evident, then replace the shunt./

Interesting. That might be part of the problem; as the shunt is a bit discolored. I would say that as the shunt gets hotter it would probably blow up card 4 as well since the voltage drop on it would be several to many volts.

Anyone got another shunt?

Chris