Hi 4567, welcome to Outdoorking.

I'm not clear on what you mean by "the blade". Are you talking about the reel, or the bedknife? It is a very bad idea to remove the bedknife (that is, the fixed blade) from the cast iron soleplate to which it is attached. You need a press and special tools to put it back on properly, and meanwhile there is a risk you will damage the soleplate, which is quite expensive to replace.

Please explain what you are trying to do.