Heizung/Klima: StepperMotors

[Beumers]

Hi all.
A few years ago I removed the dashboard in order to repair the mounting from the 2 steppermotors on top of the hot and cold air regulator.
For some time now the front window airducts keep blowing hot air no matter what. So I want to fix that.
I fond a secondhand regulator and want to exchange the upper part of the regulator. In order to check the free play of the mechanism from the airvalve axels I want to remove the steppermotors. If I put them back on, do I have to position the axels in exactly the same position to prevent the steppermotors from demaging the housing.

Greetings Henk.