The spray arm hose developed a hole in it and wasn't cleaning the upper tray well anymore

I removed the old spray arm, using a screwdriver and plier. I found it easier to do this after I removed the whole upper tray, which I was able to do after popping out the cotter pins on both sides of the tray and turning the tray upside down. Then I installed the new spray arm kit, using just a screwdriver (it only goes in one way), reinstalled the tray and cotter pins and was done. One caution, make sure the clip holding the hose is mounted exactly where it should be or the new spray arm will not spin. Just check to make sure it spins properly.