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I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set. The motor has stopped working as it has been dropped on one of the wheels.

How can I open the motor case to effect a repair?

  • 1
    Do you want to open the train unit or the motor itself? – Mast Dec 21 '17 at 2:14
  • I need to open the red case of the motor itself. I think that one of the gears has been forced out of engagement, maybe the shaft is bent, – RAP 77 Dec 21 '17 at 10:28
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According to Bricklink, Set # 7730 has this motor :

bb12va Electric, Train Motor 12V Modern Type I with 2 round contact holes

For disassembly and repair you can look at this large post with pictures on Eurobricks by Andromeda

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Unfortunately, repairing it will not work, if the shaft is bent, as the wheel would just fall off again.

  • 1
    Replacing shafts is something routinely done on non - LEGO mechanisms. Why wouldn't it work here, if it's bent? – Mołot Apr 4 '18 at 8:55

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