I've got the 42034 Quad for my birthday and it's been really fun to play with technic after so many years.

I am very curious about one thing, though - how does the pull-back motor (12787) work and look internally? I'd unscrew mine but I am afraid I'd damage it.

I am guessing it probably uses some kind of spring and/or rubber bands to build the pressure but I'd love to know it's internals precisely.


Another type of pullback motor has a detailed structural disassembly here: Imgur album.

I think your motor should work mostly the same way, but I wasn't able to source such internal pictures.

  • 1
    The Picasa album you referenced appears to be a dead link. – EJ Mak Oct 7 '17 at 1:54
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    Thanks for the heads-up, it seems Picasa as a service has been retired. I have found the images and reuploaded them to Imgur, hopefully that will not go away soon :) – zovits supports GoFundMonica Oct 7 '17 at 2:11

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