found this thought someone might be able to use it..
I have done both, replaced the belt rather then adjust it and adjusted it. If it has over 1000 miles on it I would say replace it, otherwise adjust it...if you have the tools.My Prairie 360 has 113 hours on it and belt light came on. Measured deflection is quite out of spec (1.75"). I'm leaning towards OEM belt replacement instead of trying to remove shims to take up slack. Anyone have any advice based on personal experience? I'm not interested in better performance. Mine is fast enough for the farm. I just need it to perform when needed and not slip.