The following problem with my stage: The stage otherwise ran without problems. A few days ago, a rubber block on the secondary side (?) was accidentally placed under a support arm. Was only noticed after several attempts at lowering. The block was of course removed and the stage could still be used without any problems. Apparently has taken some damage after all. The question is now what? The lift trucks are both in final position at the bottom. now driving up the stage there is a loud bang, that whole thing so to speak gets a violent mechanical blow and you let go of the switch immediately already out of common sense. My guess: 1. Hubmutter broke (if, which) 2. Re-reciprocating device has addressed (where is the u. how does this work) Both information come from the associated test book by Hofmann “Repair of disturbances”. Outwardly nothing is recognizable. The only thing that is striking is the position (Pos. 34, Fig. 2 in the stage book). Unfortunately, I can’t verify the original position of the sprocket, only have the primary side (motor side) as a reference. There, however, the position looks different! Would I be happy if someone could provide assistance.