RMweb Premium Mallard60022 Posted February 1, 2020 RMweb Premium Share Posted February 1, 2020 I have just spent ages, without success, trying to find the discussions about the well known fault with some Hornby Bulleid Pacifics' gears and or wheels not rotating freely. A recent Auction win from Vectis, of what appears to be a new and unrun Merchant Navy 35011, has no visible faults with the gears as I opened the thing up and removed the motor to check before running it in, having stripped the gears on a previous model as I had not checked it before applying power. 35011's wheels feel free and the valve gear & rods all seem free and undamaged but the wheels will only rotate about half a turn and then there is a really tight spot and I won't force it beyond that spot. The motor is removed and only the axle gear and then the next drive gear are in place and seem undamaged. Has anyone had this particular problem and if so, how did you cure it please? Many thanks Phil Link to post Share on other sites More sharing options...
RMweb Gold Oldddudders Posted February 1, 2020 RMweb Gold Share Posted February 1, 2020 Have you checked the rods are not fouling each other on one side? 1 Link to post Share on other sites More sharing options...
steviesparx Posted February 2, 2020 Share Posted February 2, 2020 Double check the power train gears - I had a couple with hairline cracks that only opened up under load, a regular fault with the West Countries / Merchant Navies... 1 Link to post Share on other sites More sharing options...
DCB Posted February 2, 2020 Share Posted February 2, 2020 Cracked drive gear on driving axle is most likely suspect. Check rods for fouling and bowing while pushing the chassis along the track before replacing the motor, Forcing it could snap the cylinders or valve gear. Wheelsets including ones with gears seem to readily available but of course they could themselves be faulty. 1 1 Link to post Share on other sites More sharing options...
cypherman Posted February 3, 2020 Share Posted February 3, 2020 Hi, Have you checked the quartering. It could be out on one of the axels. Had a similar problem with a 9F. Ended up scrapping the chassis and getting a replacement from that well known auction pit. Never could find out what was wrong with the damned thing. 1 Link to post Share on other sites More sharing options...
RodneyS Posted February 3, 2020 Share Posted February 3, 2020 I have a rebuilt BoB which hadn't been used for a while. When I came to run it I found that one axle was seized in the brass axle bearings. It took a lot of lighter fluid and prodding to free it up but then it was fine. I had a similar problem with a 'Wilton' bought second hand. This one ran badly because the bearings were revolving in the chassis block. Just another thing to check although you say your wheels turn freely. Fortunately I have not had a cracked gear. Rodney 1 Link to post Share on other sites More sharing options...
RMweb Gold RedgateModels Posted February 3, 2020 RMweb Gold Share Posted February 3, 2020 1 hour ago, RodneyS said: I have a rebuilt BoB which hadn't been used for a while. When I came to run it I found that one axle was seized in the brass axle bearings. It took a lot of lighter fluid and prodding to free it up but then it was fine. I had a similar problem with a 'Wilton' bought second hand. This one ran badly because the bearings were revolving in the chassis block. Just another thing to check although you say your wheels turn freely. Fortunately I have not had a cracked gear. Rodney Phil, as I said in the other topic, both of Al's West Countrys suffered from this problem, on one all three axles had solid bearings - that's why it didn't run at all. Gears were OK though. The other just the front axle was solid, maybe this is the cause of the failing drive gears? If you want to pop it round I can have a look but I am very busy at the moment, still got to complete Al's locos as he now wants sound Mansfield Show is on the 7th & 8th March, you could pop along ........ 1 Link to post Share on other sites More sharing options...
RMweb Premium Mallard60022 Posted February 3, 2020 Author RMweb Premium Share Posted February 3, 2020 5 minutes ago, RedgateModels said: Phil, as I said in the other topic, both of Al's West Countrys suffered from this problem, on one all three axles had solid bearings - that's why it didn't run at all. Gears were OK though. The other just the front axle was solid, maybe this is the cause of the failing drive gears? If you want to pop it round I can have a look but I am very busy at the moment, still got to complete Al's locos as he now wants sound Mansfield Show is on the 7th & 8th March, you could pop along ........ I might just do that Ian. I suspect it may be a patient for you at some later time. Thanks for the suggestions all. Phil Link to post Share on other sites More sharing options...
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