Opel Combo B /Coupling Switch /Help

Moin, I bought a combo for cheap, and the clutch is probably gone, seems like it doesn’t separate properly anymore because the walks go in pretty hard when the engine is on, when the engine is off they go in perfectly. Now to my actual question, is it possible to change the clutch WITHOUT stage? And can someone give me such a little instruction? Have been through the rushes only I find nothing, and yes I am half lay in the matter. But if what is wrong with you? It is not so bad, I would like to try it myself. Would be cool if someone could help me. Achso it is a 1.7D greeting from Berlin/Brb