That instruction clears the fog in the kit instructions. I have never accepted that it be essential that the bushing can move freely on the shaft. This is the proof! It is the sprocket that moves on the bushing when tightening!
This must be an error in translation. There is no way you could possibly fit the hub caps with grease (Schmierfett)! Neither can you use the cone headed bolt. The hole in the shaft is now occupied! I wonder how you mean, Peter?