Hello everybody, sorry I don't speak German, so I hope you'll accept I write in English and you'll undertsand me. I need to strip down the body of my HR 66/12920 to reach the motor. Perhaps there is a sketch ? Or an explination wil be find. Thank you for you attention. Greeting from Belgium. Michel.

No need to "strip down" the body...

Just remove the steering and driving rods from the middle driving wheel, remove the upper brush holder and the loosen the four nuts that hold the motor to the chassis.
These are four nickle plated, domed nuts that are placed on the engine's running board.

If you don't get along with these instructions, maybe your HR was altered. Then please post a picture of your locomotive.

Regards,

Felix

Hallo Zusammen
@Felix
Den Knof an der Umschaltstange sollte er auch abnehmen
beste Grüsse Richard

Good evening Felix, You are right is very easy, thank you.
Moreover, I have two green HR66/12920 and on the second one the four nickle plated domed nuts are only fore black screws.
Strange !
Michel.