Hello, New to the forum but glad to find you all. I have a Prime Mover L1000 skid steer. From what I have seen it was made in the mid 80's in ND and called a Rounder. When I throttle up I can lift and tilt the bucket empty. However, when I get dirt in the bucket, it will not lift. Everything worked fine and then I noticed it getting weaker and now it just won't lift with weight in the bucket. I have been told that a bypass valve or something like that could be stuck open allowing the bucket to lift with no weight in it, but not creating enough pressure to lift when the bucket is full. Does anyone know of how I can try and diagnosis this and see if it is a valve. Hopefully it is not the pump itself. Oh, the drive motors work just fine and are strong. Are there 2 seperate pumps? Thanks