It's an easy job if you can get to the belt, and if you can easily get another belt of the same size. In older tractors it's usually really easy, but last year I broke a belt on my 2007 Kubota tractor. I couldn't get to the belt. Luckily I have a local tractor maintenance guy who has a service truck. I had to call him. I've replaced belts on my vintage tractors several times with no problems.