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Powered up xl motor issue

Ingo posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling

Hi To whom it may concern. My one month old 4x4 extreme 42099 lost power at the rear wheels. I then took it apart to see if something might be stuck in the gears etc. No, everything mechanical including hubs were fine. Ran the rear powered up XL motor outside the truck and found that it made a grinding noise vibrating excessively and started to sieze when rotating anti-clockwise (truck moves forward) , but reverse works fine. What to do? Is there such an replacement motor available? Think the motor overheated because of resistance when not being able to make a climb etc. overload. Or just a bad motor? Why does the motor vibrate excessively and struggle to rotate ONLY anti-clockwise? Have anyone had this issue? Please advice.

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