Arrow Posted January 29, 2014 Hi all! I need to change one of my lego 9v train's motor. I saw that tamya motors for 4wd are perfect for them. Do you know how to put them in it? And what type of motor I need? Thank you very much! Share this post Link to post Share on other sites
zephyr1934 Posted January 29, 2014 Search through the archives in this forum, there was a very good thread 6-9 months back that both identifies a good replacement motor and provides a tutorial on how to replace it. Share this post Link to post Share on other sites
LEGO Guy Bri Posted January 29, 2014 (edited) I believe, though not 100% sure, that the motor inside the PF train base is a direct fitment for the 9V. They both have two driveshafts, 4WD, and similar, if not same, gearing. The new PF train motor also runs from 9V, battery, power (6x 1.5V AAA). It's just a matter of careful disassembly, wire cut/solder, and reassembly and you should be good Edit: Searching through my profile, I found this. I keep links regarding LEGO trains (mainly 9V) Edited January 29, 2014 by LEGO Guy Bri Share this post Link to post Share on other sites
Arrow Posted January 29, 2014 I was thinking to put a tamiya motor...i don't know if it will run...the only problem is that motor has not the 2 final gears..can I take the ones from the original motor? Share this post Link to post Share on other sites
Arrow Posted January 29, 2014 I found that the brand of the motor inside the 9v motor is a mabuchi... Share this post Link to post Share on other sites
Lazarus Posted January 30, 2014 (edited) My right up a few months back with a fix, I have since done all my faulty 9v in this way and no issues. http://www.eurobrick...topic=83667&hl= Would be good if any one in Admin could put this link somewhere as this questions comes up a little. If made this to help everyone out and save people some $$$ on buying working 9V motors. Edited January 30, 2014 by Lazarus Share this post Link to post Share on other sites
toxicbananna Posted January 30, 2014 I believe, though not 100% sure, that the motor inside the PF train base is a direct fitment for the 9V. They both have two driveshafts, 4WD, and similar, if not same, gearing. The new PF train motor also runs from 9V, battery, power (6x 1.5V AAA). It's just a matter of careful disassembly, wire cut/solder, and reassembly and you should be good Edit: Searching through my profile, I found this. I keep links regarding LEGO trains (mainly 9V) How about motor from lego train 8866? are they direct fit? Share this post Link to post Share on other sites
Lazarus Posted January 30, 2014 (edited) I could do with doing some better videos at some point. But at present I have my HE with 4 motors in it and lights. each power car has a 9v with a PF motor, with the internal 9v motors replaced with PF internals. Yellow cargo with 9v and PF motors and the 9v with internals replaced. Would only recommend using a repaired 9v motor with PF motor in tandem with PF motors are these are the most powerfull out fo the 3 types and you will end up killing the PF motor if if it has to push a normal 9v around. About to do a 9v internal replace ment with an older RC motor (out of the 8866) to see if the change over is any easyer. But this motor in question is for a single motor tran so if the speed is diffrent than a PF motor no matter. The RC motors are the worse out of all 3 types for power so not a recommend swap and only if u had alot of these around to use. PF motors are in large surply at present and cheap. Edited January 30, 2014 by Lazarus Share this post Link to post Share on other sites
Arrow Posted January 30, 2014 I bought via BL a motor... the code is 87574c01. Is it the right motor to use? Share this post Link to post Share on other sites
Lazarus Posted January 30, 2014 yes that is a PF motor with the cable Also will be working on the RC motor fix today some time and i will let u know how it goes all Share this post Link to post Share on other sites
Arrow Posted January 30, 2014 Because I read "RC motor", and i was crying like a baby :D Thanks a lot...the box will arrive few days...too i will work on it soon. Share this post Link to post Share on other sites
toxicbananna Posted January 30, 2014 yes that is a PF motor with the cable Also will be working on the RC motor fix today some time and i will let u know how it goes all That great, do post if it fits directly to a 9v motor. From I understand, you must sand the tip of the plastic before fit directly into the 9v case. Can you confirm that PF motor will be a direct fit except we need to resolder the connection? As I have about 4pcs of RC motor and unsure if I should rip it open to do the switch or sell it Share this post Link to post Share on other sites
Arrow Posted January 30, 2014 Yes, resolder the connection (or just put together turning the cable with it)...take care not to cut off the thermistor... Share this post Link to post Share on other sites
Lazarus Posted January 30, 2014 no not that easy , u need to trim down the PF motor to make it fit the 9v case. Watch my videos it tells all. Also the thermistor is not a big deal, if you lose it it just stops the over heat cut out. Just compared the 9v internal with the RC internal and it wont be a swap. You need to do the same mods to the internal motor as i show in my video, The RC and PF internal motor casing are if not the same. So you can use a RC or PF internal motor to fix the 9V but minor mods needed and its only matter is sanding down some bits. The fix can be done for ether but for performance I would always recommend the PF internal over RC. Share this post Link to post Share on other sites
Lazarus Posted January 31, 2014 Link to the RC fix tutorial http://www.eurobricks.com/forum/index.php?showtopic=91724 Share this post Link to post Share on other sites
Arrow Posted January 31, 2014 Perfect!! Thanks a lot!! Share this post Link to post Share on other sites
