cowside Posted September 15, 2019 Share Posted September 15, 2019 I have acquired an oldish Castle class loco with a 3-pole motor. I have about 20 such loco and thought I knew their problems and solutions. This loco is a puzzle. it makes a clicking noise which increases in frequency as speed increases - at the same point in the revolution every time.I thought it was a missing cog tooth, but checked and it's not - especially as the loco goes beautifully at very slow speeds. I then thought it was a coupling rod striking the cylinder slider - not that either! Then checked the B2B on the driving wheels, and they're OK. Changed the motor brushes and springs as well.I'm baffled! Currently the loco is unusable since it creates a cacophony of sound at anything other than shunting speed. Any thoughts? Link to comment Share on other sites More sharing options...
atom3624 Posted September 15, 2019 Share Posted September 15, 2019 You mentioned the coupling rods.What about the piston rods - are they catching the coupling rods?Any chance there's a worn gear / motor is not mounted securely?How is the quartering, as it's an older locomotive? Al. Link to comment Share on other sites More sharing options...
walkingthedog Posted September 15, 2019 Share Posted September 15, 2019 Turn the loco upside down, apply some power to the wheels and see what is catching. If you can’t see anything then it must be inside. Link to comment Share on other sites More sharing options...
cowside Posted September 15, 2019 Author Share Posted September 15, 2019 Coundn't see anyting catching when I applied power direct to the wheels - one of the first steps I tried! It's really baffling! Link to comment Share on other sites More sharing options...
Stubaggieboy Posted September 15, 2019 Share Posted September 15, 2019 Is it a Hornby loco drive model?? If so it is probably a split gear. I have had this on numerous occasions normally the gear set between the motor and axle . Just a thought. Link to comment Share on other sites More sharing options...
cowside Posted September 16, 2019 Author Share Posted September 16, 2019 Will check this again! Link to comment Share on other sites More sharing options...
Buz Posted September 18, 2019 Share Posted September 18, 2019 Hi cowsideI have just had a daft thought turn the tender over and see if it was one of the locos that was fitted with a chuff chuff deviceIt will have a tag fitted to one axle that rotates with the wheels and rubbed on a plastic strip coated with a very mild abrasive.If the abrasive is gone it will click instead of chuff and the click varies with the speed just as the chuff did.just a thought.regards John Link to comment Share on other sites More sharing options...
atom3624 Posted September 18, 2019 Share Posted September 18, 2019 James May would be proud of you - never know!! Al. Link to comment Share on other sites More sharing options...
Ruffnut Thorston Posted September 18, 2019 Share Posted September 18, 2019 Unfortunately, the Castle in question is likely to be the ex Airfix / Mainline / Dapol model... Cowside has mentioned changing the brushes, and springs, so probably a Ringfield type motor. The nearest Hornby "Exhaust Steam Sound" loco would be the "Hall Class".These have the X.04 / X.03 type motors. Incidentally, the strip is brass.The abrasive can be replaced if needed by attaching a small piece of a suitable grade of sandpaper, double sided tape works well! Still a good thought! Link to comment Share on other sites More sharing options...
afman63 Posted May 20, 2020 Share Posted May 20, 2020 Hello. Has there been a resolution to this issue yet ? I just took delivery of a used Castle engine that is making that same clicking sound. As I'm totally new to OO and have never taken one of these engines apart, I'd hate to ruin it without knowing what I'm looking for. I do have 50 plus year repairing American Flyer (S) and some Lionel (O) engines, but Hornby is whole new ball game for me. Thanks. Link to comment Share on other sites More sharing options...
Chrissaf Posted May 20, 2020 Share Posted May 20, 2020 @afman63Whilst you wait for a reply, perhaps you would spend a few minutes reviewing the TIPs in the TIP page link below: TIP: As a newbie poster on the forum, just be aware that the 'Blue Button with the White Arrow' is not a 'Reply to this post' button. If you want to reply to any of the posts, scroll down and write your reply in the reply text box at the bottom of the page and click the Green 'Reply' button..See also – further TIPs on how to get the best user experience from this forum.https://www.hornby.com/uk-en/forum/tips-on-using-the-forum/. Link to comment Share on other sites More sharing options...
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