Intermittent running

[Pauljb83]

Hi guys and girls. 

I have an issue with my tender driven flying scotsman. This week all of a sudden it's decided to stop working.  It was running fine and now it only moves when nudged.  Seems to be when the wheels are in a certain position.  There is a small amount of movement when the tender is on the tracks (as if the wheel spacing is a different length to the track). Motor is fine,  and contacts have been cleaned along with these wheels themselves. 

Any ideas on why it's not performing as it should???.

Thanks in advance. 

Paul B

[JJ73]

Welcome to the Forum ...

Check the connection between Tender & loco Perhaps???

 

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[2e0dtoeric]

Motor brushes worn out?

Dirty track?

Dirty, slack or corroded rail joiners?

How is the controller connected to the track?

What controller are you using? Tender drive tells me it is an old model. New train-set type controllers aren't powerful enough for the motor, and thermal overload, then shut off for a while, until it cools off again.

[walkingthedog]

Wheels are in a certain position. If you mean the loco wheels, not the tender, are the connecting rods jamming?