Hello, I have a Cub Cadet RZT50, model 17A12ACP056, ser 1C049G10117. I purchased new blades for it. The manual doesn't really give great instructions on how to replace the blades. It does say to use a 7/8 socket Ithink, and that you can hold the nut onth top to remove. Are there actual bolts running through the entire bearing assembly to the upper deck holding the baldes on. If somebody could just let me know how to do this it would be appreciated. I'm not even sure which way to loosen or tighten etc. Thank you much !!