1971 primary pump leak - started again - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 07-02-2012, 07:30 PM Thread Starter
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1971 primary pump leak - started again

Well, I thought I had fixed the leak on the primary pump - I have the connections in and out cranked down so could the leak actually be coming from the pump mechanism itself? If so can that be removed and replaced? As I am sure you know the hand pump part is unscrewed then pumped up and down - could it be leaking up inside and weeping down the outside of this part?

what is odd is that I got it to stop - maybe just by luck by twiddling the top part and tightening down again but it is back.

Lee
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post #2 of 5 (permalink) Old 07-03-2012, 12:28 AM
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Where does it leak exactly?
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post #3 of 5 (permalink) Old 07-03-2012, 12:38 AM Thread Starter
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Ah....a good question - if left for a day it dries out - then I start the car and by the time I get to it to have a look it appears to be coming out from the bottom left area (at the connection with the banjo fitting which leads to what must be a filter (not the inlet side from the fuel supply) it is not coming from the top of the pump area but at the bottom left side - maybe I need an assistant to watch and see exactly where it start from when I start the car but so far that is where I think it is coming from.

Lee
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post #4 of 5 (permalink) Old 07-04-2012, 08:29 AM Thread Starter
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Well, I undid the screw top of the plunger mechanism, pumped it up and down a few times then pushed it down and screwed it in good and tight...leak stopped - so must be coming from there. Looks like this whole part can be removed from the body of the pump and replaced?


Lee
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post #5 of 5 (permalink) Old 07-04-2012, 11:05 AM
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You can replace the old hand pump with this one:



The hand pump can be screwed out.
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