I need to replace the serpentine belt on my 1997 F150 V6 4.2L.
When it comes to working on cars, other than an oil change, I tend to let someone else to it. The serpentine belt looks easy enough for me to do on my own and save some money. Is there anything I should know that I don't about replacing the belt? Like getting the timing out of adjustment or ?????? I am assuming it would be just like replacing a belt on a mower deck etc...

Also the shop I get my work done recommends replacing the belt adjuster at the same time. I know it can't hurt but is that necessary.