The next part is where I’m again having a good think about what to do. So, any input / advise / opinions would be appreciated. The Hydraulic valve block Is something I’ve been leaving and putting to one side for sometime. The question is, should I take it apart and clean it, or just try flushing it through in place?? The good news is I can get replacement seals for all the bits. Hurray! If I take the plunge and pull it apart.