Oh, forgot to answer one of your questions. I was trying to lift a wagner loader frame, without the bucket. Just the front end of it, as the back was still on the ground. It was not mounted. I have no idea of the weight. Another person had told me that he had unloaded one of this in the past with a boom. I was using a boom at the time of breakage.
I just assumed that if the pressure was anything over the 1600 pound range, the safety valve would trip and I could never experience an over pressure situation, no matter what the weight. Just figured the weight wouldn't lift if the safety valve was tripping. I don't know if this is the right thinking.
I would say at the time I blew the side chamber, the loader frame was about 3/4 off the ground.