Paul St. John

I got the 1600 psi Ryobi powerwasher... one day, when I was using it, the entire hose inlet part of the machine popped out the body . I tried pushing it back in... as soon as I put water through the hose, it pops out again. I want to fix it myself and save myself a hassle, but dont want to void warranty if my repair doesnt work out. Anybody know anything about this? Is it common? Is it a simple problem or does it imply structural damage somewhere? Thanks.