Les Bird Posted November 20, 2016 Share Posted November 20, 2016 My Bachmann Class 24 which has run impeccably until now has started making an annoying high pitched squeal in one direction. I've taken it apart and run the motor with both bogies removed and it's virtually silent. Rotating the drive shafts by hand on both bogies reveals no tight spots or any other obvious problems. I've lubricated (sparingly) all the bearings and gears but the noise persists, apparently from one bogie. Any suggestions? Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted November 20, 2016 Share Posted November 20, 2016 High pitched squeal = probably motor shaft speed component, which I assume you know from the diagnostic path followed. It's only happening under load, since this shafting is silent with the bogies removed. Top suspect would be the worm bearings on the tower of the noisy bogie, possibly the shaft coupler cup in the flywheel slipping, but that's usually silent. Less likely, sometimes a wiper pick up can 'scream': flying leads to power the inverted unit and get it screaming, then in turn move each wiper off the wheelback with a cocktail stick or fine probe to see if you can eliminate the noise that way. Do tell when you track it down. Link to post Share on other sites More sharing options...
JSpencer Posted November 20, 2016 Share Posted November 20, 2016 I had the bearings on top of the gear towers (only when under load) on 2 Hornby diesels. Admittedly the towers are open on the Hornby locos so are easy to oil once you reach then. Had no problems with Bachmann though but the designs of both are quite similar. Link to post Share on other sites More sharing options...
tamperman36 Posted November 20, 2016 Share Posted November 20, 2016 Ive heard that Bachmann gear towers can suffer this problem ,usually the top bearing from what I've heard, good luck hope you can get it sorted. Link to post Share on other sites More sharing options...
RMweb Premium MickD Posted November 20, 2016 RMweb Premium Share Posted November 20, 2016 Hi Les, I had this problem with a Bachmann 24. my solution was to order new bogies from Bachmann. Fitted these and the problem was cured. I contacted Bachmann through their website and they replied next day with the price which was paid through PayPal. I was pleased with the way they coduct their supply of spares, very quick and efficient service. Hope that helps. Best of luck. MickD. Link to post Share on other sites More sharing options...
RMweb Gold MikeParkin65 Posted November 21, 2016 RMweb Gold Share Posted November 21, 2016 Hi Les, I had this problem with a Bachmann 24. my solution was to order new bogies from Bachmann. Fitted these and the problem was cured. I contacted Bachmann through their website and they replied next day with the price which was paid through PayPal. I was pleased with the way they coduct their supply of spares, very quick and efficient service. Hope that helps. Best of luck. MickD. Could I ask how much they charged? I've got a 20 with a similar issue. Link to post Share on other sites More sharing options...
RMweb Premium MickD Posted November 21, 2016 RMweb Premium Share Posted November 21, 2016 Hi Mike, Sorry can't remember how much, but wasn't dear or I wouldn't have bothered!!. Just get in touch with Bachmann through their web site and enquire, they are very helpful. Hope that helps. MickD. Link to post Share on other sites More sharing options...
John Tomlinson Posted November 21, 2016 Share Posted November 21, 2016 I've also noticed this on one or two of my Bachmann 24's & 25's. I seem to remember that a bit of lubrication helped, and post #2 is very helpful in being specific. The early ones are quite tricky to gain access IIRC, as they didn't have the unclipable wire connectors. John. Link to post Share on other sites More sharing options...
Les Bird Posted November 22, 2016 Author Share Posted November 22, 2016 Thanks for the various suggestions. I'll certainly investigate the gear towers more closely. Failing that, perhaps a replacement bogie is the way to go. Link to post Share on other sites More sharing options...
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