(ET) Re: Hot shunt

[Christopher Zach <czach computer org>]

> /"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