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Old 11-03-2018, 01:48 AM   #1
Gordon234
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Default Bachmann Dukedog slow running

Good evening!

I am enjoying my Bachmann Earl class locomotive #9028 ( BR black ), which just arrived the other day in the mail. As recommended, I am steadily running it in at slow and moderate speeds, both backwards and forwards, and always as a light engine, with no wagons or vans attached yet.

It is performing very well at slow and moderate speeds on the main line, but when I want it to just barely crawl along, this engine has a slight "hitch" each time the rods go around; it does not stall, but a noticeable jerkiness in its progress results. ( I know it should be able to crawl along smoothly, since I have seen this locomotive in action on one of Sam's Trains video reviews ) Is there anything I can do to remedy this, or do I simply stay the course and continue to run it in at varying speeds, in the hopes that this jerkiness eventually disappears?

Any advice / help you can provide me with would be very much appreciated. In all other respects this Dukedog is a wonderful engine.
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Old 11-03-2018, 02:34 AM   #2
dtb
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I had the same issue with a Hornby Britannia 70007 purchased recently, it was a great runner at moderate speed but had the same reoccuring jerk when running at a crawl. I let the store know immediately of the issue and my intentions to fit a decoder and see if the problem got resolved.

Subsequently it didn't solve the problem and the loco when back for an exchange.

I know this won't fix the problem you are having, equally I don't think it will just go away either and someone may have better suggestions but prepared to send it back for a replacement.
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Old 11-03-2018, 08:58 AM   #3
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If it is just a bit tight, then proper running in should improve things. Alternatively something in the valve gear could be slightly bent - it's easy to do this just by picking the loco up. If you have a servicing cradle or some thing you can safely support the loco upside down on the bench then run the loco by holding two powered wires to the wheels. You may be able to see where it is catching. If it is bent then a gentle easing with a suitable lever should cure it.
Finally, you may have picked up a bit of grit in the internal gears which would need careful cleaning and relubrication.
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Old 11-03-2018, 09:59 AM   #4
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Default Thanks for the feedback

Thanks, Steve. I will continue to persevere with the running in and see what happens. What you mentioned about the grit had also crossed my mind. 🙂
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Old 11-03-2018, 10:05 AM   #5
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Default Replacement possible

Yes, dtb, I was also thinking of a replacement if the performance didnít improve. Hope your new Britannia has worked out nicely for you. Usually I find that hobby stores are ready to step up in this respect. 🙂
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Old 12-03-2018, 09:55 PM   #6
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Are the wheels mildly out of quarter? Are any of the bolts to the side gear loose and
working themselves loose?
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Old 13-03-2018, 12:04 AM   #7
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The bolts and wheels seem to look OK. Perhaps something in the interior. I have decided to send it back to my stockist for a replacement. Probably the easiest course of action? Thanks for your feedback, nevertheless.
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Old 13-03-2018, 12:09 AM   #8
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Quote:
Originally Posted by Chops View Post
Are the wheels mildly out of quarter? Are any of the bolts to the side gear loose and
working themselves loose?
I was thinking along these lines.
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Old 15-03-2018, 02:47 AM   #9
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Good idea. I rather wished Bachmann's generally worked as good as they look.
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