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· Master Mariner
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Unfortunately, what you are getting into here is the possibility that you have or will destroy the seal in the process of removing the impeller hub. Removing the pump and getting it in a vice or at least on a bench, will probably help. Soaking the pump in diesel for a few days or longer might help, if the Blaster isn't doing the job. You may have to completely disassemble the pump and get the shaft out to fix this, At any rate, it's probably going to take vice grips and a hammer, which will surely destroy the seal.
Look around for a used pump that you can keep around (after rebuilding) to use for a quick change out, if an impeller goes.
Next time, lube the shaft with Never Seeze and you won't have this problem again.
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