I repaired it many years ago.But it looks like there are new changes in the structure.
Is there a problem at the location shown in the picture below? If so, please send a clear picture
![[Linked Image]](https://www.ebme.co.uk/forums/ubbthreads.php/ubb/download/Number/911/filename/40l.jpg)
I remember that it was composed of a small spring, an O-shaped nitrile rubber ring, a column and other parts.
If possible, it would be best to post a disassembly diagram