BrickWild Posted March 3, 2011 Posted March 3, 2011 I have an old 5x4 9v technic motor that has an outer spindle that turns when the inner one is spinning and when I hold the outer spindle, the inner one keeps spinning. Perhaps the internal glue is worn. Is there a way to fix them together so that it can make my models work properly? Quote
DLuders Posted March 3, 2011 Posted March 3, 2011 The Bricklink Part 5114 5-stud x 4-stud 9V Motor (which Peeron lists as Part 2838c01) should be able to be opened for examination. What have you got to lose, since the motor doesn't work now anyway? You could maybe pry it open and see what's wrong inside. According to Philo (Phillippe Hurbain), "The older 9V Technic motor (1990). Ungeared, it has a high rotation speed and low torque, so for most applications it requires an external gear reduction." Philo took apart the (next generation) 43362 9V Motor on his website, so you could see what it looks like. Quote
Philo Posted March 3, 2011 Posted March 3, 2011 I have several other opened LEGO stuff in my Brickshelf gallery, including the 2838 motor (images and opening procedure courtesy of Jochem Wildenberg). Hope it helps... Quote
allanp Posted March 3, 2011 Posted March 3, 2011 There is no need to open any motors as he has already described exactly what the problem is. The metal shaft is spinning inside the plastic external shaft. This has happened to me before. What I did was to remove the outer shaft by pulling on it very hard, you may need to use pliers for this or two thin screwdrivers to lever it off. Then you can fix it back on in a number of ways like using a good, suitable glue or, like I have done in the past, wrap some paper/tissue/cling film or something like that round the metal shaft before forcing the plastic axle piece back on making it mich tighter. Has worked flawlessly for me ever since. Quote
BrickWild Posted March 4, 2011 Author Posted March 4, 2011 Pried off the outer shaft using 2 screwdrivers! Would Superglue work for fixing the outer shaft to the spindle? Quote
DLuders Posted March 4, 2011 Posted March 4, 2011 Yes, Superglue works well on Lego parts. Try to use the thick type that stays in place and is not "runny". Quote
Blakbird Posted March 4, 2011 Posted March 4, 2011 Superglue (cyano-acrylate) works great on plastic but won't stick to the metal shaft. I'd use JB Weld or epoxy. Quote
BrickWild Posted March 4, 2011 Author Posted March 4, 2011 Yesterday, my mother fixed the outer shaft onto the spindle with the thick-type superglue, & guess what; it worked! Quote
JunkstyleGio Posted March 5, 2011 Posted March 5, 2011 That's great! It is alway so cool to get an old motor working again! Was it "a leap of faith"? or did your mother made an "executive decision"? Quote
BrickWild Posted March 5, 2011 Author Posted March 5, 2011 That's great! It is alway so cool to get an old motor working again! Was it "a leap of faith"? or did your mother made an "executive decision"? I'm pretty sure it was a leap of faith! And the inner spindle no longer slips, even to this day! Quote
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