So you can see I stole a line from the hobbit I got a N scale Rowa Y6b , it didn't cost me anything so I thought I would share my journey on restoring this loco to running status. Pictures are coming.... I dismantled it to it's modular pieces - not messing with the drivers unless I have to. The major fault was that it would not run, however when I applied power to the motor tabs it ran - the wheels turned smoothly. I'm testing this on DC - no decoder. The tender has no trucksand I'm picking that when I put new trucks under it and connect it electrically to the engine all will be well. The design is very old the drivers pick up power on one side only while the front , rear trucks and the tender picks up from the other side. The motor: The motor is German and it has a long armature about 18mm long, my replacement motor from china is only 13mm long in the armature - oops!! I am making a longer connector piece to take up the difference and that is where I am at right now - making a new connector
When I took the motor out and tested it, it squealed from mid range onwards. That usually indicates that it is worn. I'm not throwing it out. The replacement motor has about the same rpm range (13000 rpm). It should keep the nice slow speed performance. I can always put it back (the modifications need not be permanent.).
Here's some pictures of it stripped down, the mechanism and the two sets of drivers The motor in the picture will only be used for testing. I have found an almost exact copy of the German Motor, it'll be a few weeks until I have it on hand. This means that I won't need to make a longer connector piece and simplifies the installation.
The old Y6's were good pullers but I'm sure they had more potential. There may be some room inside for tungsten carbide ballast. https://www.ebay.com.au/itm/122065477565?hash=item1c6bab5fbd:g:EBMAAOSwYaFWeNGb https://www.ebay.com.au/itm/122046098928?hash=item1c6a83adf0:g:m4gAAOSwHPlWeJzB The seller has lots more sizes. The rectangular ones come in lots of sizes. The round rod would need to be cut off with a diamond cut off wheel though.