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This question is similar to one for PF motors.

The 12V motor bogie has considerably more resistance than does the newer PF bogie motor, which may be moved very easily when not operating.

So, if one pushes a 12V-motorized train by hand, will it cause damage to the motor?

See title "Set 7865: six wheeled Lego® train motor (12V, 1980 - 1990)" on this page for the specific motor I'm referring to.

Side note: I've noticed that the connected headlights in the train don't illuminate when pushed by hand (and have asked a question specifically in regards to this).

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As you can see in the picture below the friction has to do with driving the worm wheels via regular gears while pushing the unit by hand and yes, I guess the gear teeth on the wheel axles could be damaged because of the gear ratio.

Opened 12v train motor

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  • This looks like an early version of the 7865 motor.
    – CJBS
    Aug 27, 2015 at 5:07
  • How did you remove the wheel from its axle??
    – LegoTrainz2003
    Nov 24, 2016 at 3:30

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