I pulled the swivel about 1 1/2 weeks ago, the construction co. I work for has me going all over the state working long days , no time to work on case, plus it took about that time to get all seals and o-rings, got all parts today and of course I have to work this weekend, A case mechanic told me it could be the swivel when I told him about the hose change over with problem switching to other side. I have swivel all apart and really can't see any cut ,torn or damaged seals was really clean the case tec also said to check the relieve valve thats in that circuit , also he said check pressures right on the spool valve that runs the problem side. I really have to get going on this ,I just got a flail mower for this machine , I will post any news