Hey! I've just replace my sb-600 flash tube. before that, zoom works perfectly. now when i try to place it the batterys the zoom is going at 24mm and than stuck there and the flash won't turn

SOURCE: SB-600 Flash will not charge/everything else works.

check wire connection to capacitor measure voltage on it/
Be carefull high voltage!!!

SOURCE: Dropped Sb-600, and now when the flash can't

There's nothing you can do and DIY fixing options can be dangerous due to the very high residual voltages inside.

You've either broken the zoom motor gears or they have been displaced; either way the flash needs to be professionally repaired and preferably by an authorised Nikon service centre.

Despite the lack of a fix I hope my answer has been of some assistance. If so, please rate my answer.