The ceramic shaft of the rotor may break. In this case, it is necessary to change the entire rotor unit that this kit contains. The replacement is easy. Only the lower rubber bushing in the filter head is a little difficult to access. The JBL kit with rotor bushing extractor makes it possible to remove it. It is also useful to regularly clean the rotor chamber with a small brush, as a lot of dirt accumulates there and reduces the filter's performance.
