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Belt is OK but loose. Found small spring (idler) on ground and ordered replacement. Can’t figure out how to get to belt area where it an be replaced.

Hi @mbryantcpa Don’t know the answer but here’s the parts list for your model (did you mean 425610X99B?) that may help. On p.6 it shows the parts layout for the drive assembly. The idler pulley is part #40 in the diagram.