Gordonotron Posted June 26, 2017 Share Posted June 26, 2017 Hey Everyone, I picked up a cheap Battle of Britain loco recently which had a bit of running issues. on inspection the issue seems to be the rear axle is running up the way. I've taken the chassis apart and had a look and while the spring is in place and the axle is sitting on it, it still pushes up while running. On looking at the service sheet it looks like the read axle should have a block on it where as the ones fitted in mine is two brass brushes. I'm thinking it could just need packed up but this would probably impact the running of the loco so looking to see if this is normal or if anyone has seen this before. Cheers Gordon Link to post Share on other sites More sharing options...
RMweb Premium Hilux5972 Posted June 26, 2017 RMweb Premium Share Posted June 26, 2017 (edited) Are you talking about the rear coupled driving wheel or the pony truck wheel under the cab? I'm assuming you mean the rear driving wheel. Edited June 26, 2017 by Hilux5972 Link to post Share on other sites More sharing options...
Gordonotron Posted June 26, 2017 Author Share Posted June 26, 2017 The rear driving wheel Link to post Share on other sites More sharing options...
RMweb Premium Hilux5972 Posted June 26, 2017 RMweb Premium Share Posted June 26, 2017 Rebuilt or original Air Smoothed? Link to post Share on other sites More sharing options...
SRman Posted June 26, 2017 Share Posted June 26, 2017 The earlier MNs and light pacifics from Hornby had a sprung rear driving axle mounted in a reversible block, which had the axle slot off-centre to allow for the two different wheelbases. The springs tended to be quite soft. Later models have a rigid rear driving axle. With that in mind, you could just remove the springing arrangement and pack the block to the correct height to mimic the later setup. I haven't tried this myself, but I can see no reason whatsoever why it would not work. Link to post Share on other sites More sharing options...
Gordonotron Posted June 27, 2017 Author Share Posted June 27, 2017 (edited) That confirms my thought that their should be in a block. Mine is just two brass bearing rings. So I suspect it's the wrong wheel. Edited June 27, 2017 by Gordonotron Link to post Share on other sites More sharing options...
RMweb Gold toboldlygo Posted June 27, 2017 RMweb Gold Share Posted June 27, 2017 That confirms my thought that their should be in a block. Mine is just two brass bearing rings. So I suspect it's the wrong wheel. The bearings should clip into the block, so no it isn't the wrong wheel. Link to post Share on other sites More sharing options...
145 Squadron Posted June 27, 2017 Share Posted June 27, 2017 Gordon Attached picture of an early Hornby Merchant Navy The block has a spigot that sits on the spring and then locates in the runners in the Mazak chassis - sometimes the plastic block jams in the chassis, but in you case it sounds as though it is missing completely! I will look to see if I have a spare if that helps. Tony Link to post Share on other sites More sharing options...
Gordonotron Posted June 27, 2017 Author Share Posted June 27, 2017 DSCF1252a.jpg Gordon Attached picture of an early Hornby Merchant Navy The block has a spigot that sits on the spring and then locates in the runners in the Mazak chassis - sometimes the plastic block jams in the chassis, but in you case it sounds as though it is missing completely! I will look to see if I have a spare if that helps. Tony Thanks Tony, seeing the picture it's certainly the missing piece that's the problem. Let me know if you have one, if not I'll see what I can find. Gordon Link to post Share on other sites More sharing options...
145 Squadron Posted June 27, 2017 Share Posted June 27, 2017 Gordon Can't seem to lay my hands on the spare chassis I know I have somewhere.....! The block is not a separate part on the Hornby service sheet, and I have checked all my spare wheel sets and none of them have the block included unfortunately as they are meant for the later unsprung chassis. I think your best bet might be to have a word with Peters Spares (no connection). Alternatively you could try and get a cheap second hand chassis or loco at a swapmeet, making sure it is the sprung variety. I will keep looking but sorry I can't help at the moment. Tony Link to post Share on other sites More sharing options...
SRman Posted June 27, 2017 Share Posted June 27, 2017 With a little ingenuity, you could make a basic block out of plastic, with a bit of brass tube, or some brass bearings to take the axle itself. Link to post Share on other sites More sharing options...
Fireline Posted June 27, 2017 Share Posted June 27, 2017 Doesn't the same block come with most Black 5 wheelsets? Link to post Share on other sites More sharing options...
145 Squadron Posted June 28, 2017 Share Posted June 28, 2017 Gordon, I have found my spare block if you are still interested PM me and I will send it to you. Tony Link to post Share on other sites More sharing options...
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