How does the acceleration body change?

Hello, I have a Ford Focus 2001, one of the supports is broken to hold the screws of the acceleration body of my car, and not being well subject, it does not start or does so quickly and turns off, already remove the broken acceleration body, to place the new what recommendations are there? I have to grease it before putting it? What problems can I have?

What happened friend you could already or that I think it is not good to grease it ok seeing if it is not like that you data of your problem