Hornby tender-drive loco problem

We have a 2003 Hornby Flying Scotsman. When we put it on the track
and power up, it moves sometimes no distance, sometimes up to six
inches, then the controller shuts down.
That sounds to me like a short but I can't see any evidence of where
the problem lies. I've lifted the covers off and it ran OK with them
off for a while, which is suggestive of a connection problem of some
sort I guess, or maybe a loose wire. But everything looks fine.
The model is less than a year old so I can return it under warranty,
but before I do does anyone know of an easy fix? Somewhere wires
routinely trap or chafe? A soldered joint which is prone to failure?
I am electrically competent, by the way - I have a B Eng in electrical
engineering.
Apologies if this is a Well Known Problem - I did Google and came up
blank, but I am notoriously bad at Googling for non-Linux issues ;-)
Thanks,
Guy
Reply to
Guy Chapman
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"Guy Chapman" wrote
Sounds like a faulty thermal cut-out in the controller to me. If you can borrow another controller and the loco works fine with that, then my diagnosis is confirmed.
John.
Reply to
John Turner
Hi Does the loco have 2 thin 'prongs' on top of the connector to the tender? If so then widen the gap between them. My guess is that one of these prongs is touching the post on the tender and causing a short.
Reply to
Len Smith
Yes, the problem Len described happened to me with a Battle of Britain. Good luck Rob
Hi Does the loco have 2 thin 'prongs' on top of the connector to the tender? If so then widen the gap between them. My guess is that one of these prongs is touching the post on the tender and causing a short.
Reply to
Rob
Does the loco have 2 thin 'prongs' on top of the connector to the tender? If so then widen the gap between them. My guess is that one of these prongs is touching the post on the tender and causing a short.
Thanks for that - I thought I was smarter than that ;-)
It turns out that one of the prongs was just catching under the insulator - it worked without the cover because I put it on the track, and it failed with the cover because my nine-year-old put it on! I assembled a test track on a table with good lighting, got Michael to put the loco on the track, and all became clear.
It does seem to run better for the really thorough cleaning it got while trying to diagnose the problem!
Call myself an engineer? D'oh!
Reply to
Just zis Guy, you know?

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