Product review (5 stars): This was so easy to DIY that it's given me the confidence to ...
My repair guy wouldn't work on the washer.  Said I could buy a new washer for the same as it would cost to fix the old one.  This was so easy to DIY that it's given me the confidence to tackle other repairs around the house.  You probably do need to purchase the belt tool to make that part easier, but anybody can install this part.