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720 /powermax rear PTO seal part #

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Hi I'm planning on replacing the top shaft for the rear PTO in my 720 (stripped splines) and want to order the seal before tearing things apart. My service manual for the 720 doesn't have part numbers, but the 9020 manual says part "168006 Brake seal" John had a post crossing those to timken 471733 while talking about the brakes. My question is is that the correct seal for the front of the PTO shaft on the powermax/720? Or does anyone know the dimensions? Probably not one that's replaced often, but have to get to the snap ring under it to take out the shaft, so would like to have the seal in hand first. Thanks for the help, Rick

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