I have a Troy Bilt TB 30 riding lawnmower. I love this thing. I have a bagger on it and it worked great until this afternoon. I was mulching up leaves, and returned to dump them into the garbage bages, and I heard a pop sound. I dumped the leaves, got back on, started it up, and it wouldn't move everything was working, as I turned on the blade, but the brake clutch pedal was all the way to the front. Thinking that was odd, I took the heal of my boot, and moved the pedal towards me. It took off like always. That is really not a comfortable position to be in. I made one round, and shut it down. I did notice a spring that was busted on top of the mower. It looks like it is suppose to be on a peg on the crossbar of the main frame. the number of the spring is: 7320459C. I have hunted all over tonight trying to see what this spring does, and if it is what is giving me the problem. I decided to join this forum, and hope someone may know how to fix this. I am getting ready to remove the deck, so I thought I would ask this question. Thank you.