joff-turbo-nova Posted February 6, 2019 (edited) Last night I completed a refurbishment of a rather poorly 12v train motor. The contacts had worn giving intermittent working and the bushes were squealing like a pig so it was time to open up the case... First off made a jig to hold everything secure... I used my scalpel to cut into the case as shown on the red lines here... Then flipped the jig over and pushed down on the axles which released the two halves of the case leaving this in the jig... And the motor part in all its grotty glory.... Took the metal blocks out and started stripping down the axles and motor - +30 years of grime.... Also noticed that a wiring disc had become unsoldered - another cause of the rough running... The contacts were removed - you can see how uneven the wear has been... Got two bb53's from Bricklink specifically for their pickups... And split them open... The bb53 contacts have "nipples" on them which the motor contacts do not so these were filed flat... After that everything was cleaned with methylated spirits , the wiring plate resoldered, greased and reassembled.... Then glued and clamped.. And then after an hour taken for a test run.... https://i.imgur.com/CCPQZyD.mp4 I think the patient will live !!! Joff Edited February 6, 2019 by joff-turbo-nova Pics not working Share this post Link to post Share on other sites
Unfinished_Projects Posted February 7, 2019 Awesome work! Great to see people keeping Lego train history alive Unfinished_Projects Share this post Link to post Share on other sites
Rail Co Posted February 9, 2019 I have done this myself before (I didn't replace the contacts). I had to do this because one of the plastic pieces inside of mine happened to snap during shipping to me and it jammed the motor. Luckily the plastic piece wasn't exactly "necessary." So while I had it open I re-greased and cleaned the contacts, I have yet to glue my motor back together only because I don't want to have to crack it back open if something else goes wrong (they are getting quite old and brittle). Good ol' well applied clear tape does the job, however, you have to replace the tape every couple of weeks or so, I'll get around to making it all shiny and new one day ;). -RailCo Share this post Link to post Share on other sites
LEGO Train 12 Volts Posted February 12, 2019 I should do the same treatment at the contacts of my 7727 Share this post Link to post Share on other sites
