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Old 04-16-2012
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Volvo Penta water pump shaft question. MD5A

After I take impeller cover off, I am able to pry my impeller out without loosening anything. The end of the shaft is slotted, so the small screw passes completely through the center of the impeller and then slides into the slot. Despite this set up, it does not show such a design in my manuals. Manuals show solid shaft with screw in impeller being used to tighten down on the shaft. Is mine a modification? Am I missing a part? The end of the shaft is forked or split to accept passage of the screw which has passes through the center of the impeller into the other side of the impeller. Does this make any sense? Thanks for any response.
Greg
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Old 04-16-2012
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Re: Volvo Penta water pump shaft question. MD5A

Both of my Volvo impellers go on without any retaining screw/pin, not sure about the MD5 specifically though.
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