I work in a plant where we have several hydraulic systems. We always seem to be fighting hydraulic leaks. One system in particular we keep replacing o-rings between a valve with a DO5 pattern and the manifold block that it is sitting on with very limited success. Once we replace o-rings the leaks stop for a week or so then start dripping again. When we take the valves off to replace o-rings we often find the o-rings collapsed into the port. I am looking for suggestions to help solve this problem.
Thanks in advance.
David