At the moment I am trying to restore a small tractor that had been slaughtered a long time ago. I found the engine on the sad rest of a fellow sufferer without a cylinder and piston. The connecting rod of the formerly two-stroke, diesel-stung single cylinder looked out of the open crankcase and brought the crankshaft by hand operation loosely to turn. So I believed myself on the safe side until I hid in the crankcase and in the bearings in the oil soot many gr I discovered sand grains that forced action. Perhaps I now made the mistake of many screwdrivers and began to disassemble the two-part crankcase. When removing housing and bearing from the shaft, two insidiously glued rington bearings appeared from their worst side. I could not stop the process anymore because the housing seal had already suffered and could only be restored after dismantling. Thus, the bearings had to be removed with heat and lost in the process. New bearings of this kind are expensive. Evaporating possibilities offer pendulum roller bearings, but must be fixed in a similar way as the factory-glued ton bearings. So they are an abomination for a flexible screwdriver of my kind. So, and now I come to my question to all patient readers of my article with knowledge about the storage of crankshafts so small diesel two-strokers: Why can I not install two cone roller bearings, which are an simplest demont Is there any reason why the Fa decided 50 years ago to install the expensive ton warehouses? How can I install the warehouses without violence?