Electronics and DCC

     Hello,   Has anyone remotored a 4-8-2  N scale. And if so what motor did you use.

this one is a dcc on board loco. I took out the bachmann decoderand wired in a Digitrax DZ143.

And a MRC sound decoder. IT finaly fried the Digitrax decoder. For some reason this motor runs

very HOT. I took it out of loco and ran it freely no load on 9volts with dc transformer and it got so hot

I could barley touch it. But it only drew about 1/16 of an amp. And when I did a full amp load pull

it barley got to 1/2 amp on meter at 12 volts. but it was hot. IT fried both motor wires and decoder.

Are they supposed to get that Hot? 

                                                                               From, Truck

 Is it supposed to get that hot?  No.  That means that you have a bind in the drive somewhere.

Your best bet is to send it back to Bachmann.

David B

The motor was tested out of locomotive.  Thats when I noticed it was getting hot with no load on it.

 Probably has a shorted winding then. Only option is to replace, it can't easily be fixed. It's sort of a runaway problem - the motor stalls due to some reason and one of the windings gets hot enough to melt off the insulation, causing a short (that winding electrically has far fewer turns than a 'normal' one, thus less resistence). The shorted winding consistently runs hotter than the others and draws excessive current - possibly what fried the decoder - and if it melts more insulation it can get even 'shorter' leading to MORE heat and MORE current until finally the thing melts enough to open circuit.

                                       --Randy