I went to see if there was a belt tension adjustment on my power flow today (there is not, just the spring) and found that the outboard bearing had locked up and destroyed the shaft on my fan. So, I have been looking up all the parts I need and noticed there is a DTAC listed for the blower with two different spacers on the shaft, may explain incorrect bearing preload that caused the problem. Anyway, does someone have a copy of DTAC 79102 and could they give me a summary so I can put this back together again. I already know I need a shaft, two bearings and the pulley. Not sure if I should order the original 9/16" spacer or the 1/2" spacer?