Tried adding oil as suggested. Seemed to help although it did lose pressure a couple of times. Not as bad though. The dipstick looks like it may have been played with at some time so will drop the oil and just see how much is in there. Going away for a few days so wont get a chance to play with it for a while. In the meantime if there may be any other ideas I would be glad to hear them.
Thanks Ron.
