Meal, with my lawn mower I had problems with the wheel drive. There was only one cracking when pulling the lever but nothing moved. I could not push around curves with the mower either, because then a wheel blocked. Then I changed both wheel gears and now everything works. In the course of this I also once cleaned it properly, because even under the covers has collected a lot of grass. Now to the actual problem. The mower is now apparently so clean that the belt on the roller that sits on the motor shaft slips through. One can pull the belt through with the hand. If the engine runs therefore nothing does itself. Now there are two possibilities. Either the belt tension is too low or the roll has entered. Since one can definitely NOT adjust the belt tension, the guess is therefore the roll. But: How do I change the thing?! Get it as a spare part without problems but how do I get the cursed e thing from the motor shaft down? There is absolutely no way, at least I don’t see them to remove the knife holder, so you can’t get the roll down either. Should you take the whole engine apart?!