davetheroad Posted July 23, 2017 Share Posted July 23, 2017 I am 'fettling' the motor bogie of a Lima Class 26 before fitting a diesel-trains replacement motor. I checked the back to backs with a DCC concepts 00 Gauge and was surprised they are more than 14.5mm, actually nearer to 15mm!. I also noticed on one axle the final small gear does not quite mesh with the large gear on the wheel due to side to side play in the bearings. I guess I need to make those back to backs narrower. The question is, how do I do it without purchasing a specialist tool? Link to post Share on other sites More sharing options...
steve1 Posted July 23, 2017 Share Posted July 23, 2017 Having fitted replacement wheelsets to several Lima diesels I know they will just pull off if sufficient force is applied CAREFULLY. I assume you are using replacement wheels rather than the original "steamroller" versions? steve Link to post Share on other sites More sharing options...
davetheroad Posted July 23, 2017 Author Share Posted July 23, 2017 I intend to keep the pizza cutter wheels which on the class 26 clip in to the bearings so no need to remove the wheels from the axles Link to post Share on other sites More sharing options...
RexAshton Posted July 23, 2017 Share Posted July 23, 2017 You'11 find the uninsulated wheel impossible to move but it should be easy enough to push the insulated one in. A small vice should suffice to push the wheel in using the b2b gauge as a stop. Link to post Share on other sites More sharing options...
davetheroad Posted July 24, 2017 Author Share Posted July 24, 2017 You'11 find the uninsulated wheel impossible to move but it should be easy enough to push the insulated one in. A small vice should suffice to push the wheel in using the b2b gauge as a stop. Thanks for the inspiration. I only had a big vice but discovered a 2 inch G clamp did the job beautifully with a 1/8th turn! The back to backs are now correct and the gears are meshing well. I fitted the replacement motor this afternoon and the loco trundles along nicely on a 1.2V battery. Next is fitting the radio receiver and a 4 x AAA NiMh battery pack. Link to post Share on other sites More sharing options...
RMweb Premium BR60103 Posted July 25, 2017 RMweb Premium Share Posted July 25, 2017 (edited) One of our Platelayers has a modified C clamp (or G clamp) that has a slot where the pointy bit of the axle can poke through. I think he also uses it to pull OO wheels out to P4. I think he made it by taking the anvil off. Edited July 25, 2017 by BR60103 Link to post Share on other sites More sharing options...
davetheroad Posted July 25, 2017 Author Share Posted July 25, 2017 One of our Platelayers has a modified C clamp (or G clamp) that has a slot where the pointy bit of the axle can poke through. I think he also uses it to pull OO wheels out to P4. I think he made it by taking the anvil off. That's a neat idea. Thinks - making up some collars from washers could do the job as well. For widening coach and wagon wheel back to backs I have found forcing the gauge between the wheels works , so far. Link to post Share on other sites More sharing options...
smokebox Posted July 25, 2017 Share Posted July 25, 2017 (edited) I made a wheel puller from a small offcut of 1inch square tube. Very simple to make. A 6mm nut soldered on and a bolt with a small hole drilled in the end for the tapered axle end to fit into. Edit. It can also push wheels closer together. Edited July 25, 2017 by smokebox 1 Link to post Share on other sites More sharing options...
davetheroad Posted July 25, 2017 Author Share Posted July 25, 2017 I must be thick, I can't see how that can pull wheels apart. Link to post Share on other sites More sharing options...
RMweb Premium kevinlms Posted July 25, 2017 RMweb Premium Share Posted July 25, 2017 I must be thick, I can't see how that can pull wheels apart. Agreed, but I'm surprised that your wheel sets are over gauge anyway. I've always found that Lima wheels are VERY solidly fixed to their axles and hard to shift if you want too! Perhaps someone previously has modified them increase the back to back? Link to post Share on other sites More sharing options...
smokebox Posted July 25, 2017 Share Posted July 25, 2017 (edited) Sorry, thought you'd be able to work it out. In the first photo the axle is pushed into the wheel in the tool, thus widening the back to back. In the second photo the wheel is pushed on to the axle, narrowing the b2b. I ought to confess that this is not my original idea, just my version of someone elses Edited July 25, 2017 by smokebox Link to post Share on other sites More sharing options...
davetheroad Posted July 25, 2017 Author Share Posted July 25, 2017 Doh!, simple really. Link to post Share on other sites More sharing options...
davetheroad Posted July 25, 2017 Author Share Posted July 25, 2017 Agreed, but I'm surprised that your wheel sets are over gauge anyway. I've always found that Lima wheels are VERY solidly fixed to their axles and hard to shift if you want too! Perhaps someone previously has modified them increase the back to back? Yes, all my other Limas are about right but that class 26 was nearer 15mm than 14.5. It was second hand but the paintwork is in excellent condition and the commutator shows little sign of wear. Link to post Share on other sites More sharing options...
RMweb Premium BR60103 Posted July 26, 2017 RMweb Premium Share Posted July 26, 2017 I have a version of Smokebox's tool from NorthWest ShortLine. When I use it on axles I protect the point with a brass bearing. Link to post Share on other sites More sharing options...
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