I can strongly recomended filter change, in Hymac manuale it´s recommended to change evry 200 hour.
I even uppgrade whit strong magnetic i main & suction tank to pick up chrom pices and metal wear, see coment to tage "problem whit oil filter"
If you not have change filter for a wail you should have lot of dirt in main tank and suction tank, recomende to clean this tank to
I read about oil clean on this forum:
If you have water in oil just heat it to 95 deegres and pumpit trouh a filter elemen whit 10-15 mikron
Oil will come out reusable for your Hymac it will safe some money, but it´s recommende to change to fresh new oil
Good luck Daniel
