This happen to someone else several Years ago. Although his went all the way inside.

I think He had to remove some component on the top of the Pump to get at it from the inside. What I remember is that the Stop lever was on the one side or the other near the top near the top.

My Mom died on Sep 8th; I can see how a recent death would a bad time to have to deal major Car trougle.

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84 300D, 82 Volvo 244Gl Diesel