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Water pump packing
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Posted by CNKS on March 26, 2004 at 17:36:38 from (207.178.96.214):
This subject has been covered numerous times, but I don't have the answer to this problem. Super H water pump had worn impeller shaft, replacing old with new packing did not stop leaks. I replaced entire pump with a new one, same thing happens. Tighten new packing (4 pieces), run 5-10 minutes, nut is loose, water drips out. Tighten some more, same thing happens, tighten until snug, again, leak stops,but packing works it's way out of shaft, and it leaks again. In other words I have used various amounts of packing, with different degrees of tightening on the old and new pumps and I still get leaks. Not leaking at the moment, but the packing nut is looser than when I last tightened it. I expect it to start leaking again--usually takes 15-30 minutes of operation. It should stop with the right amount of packing, and just the right amount of tightning, but I don't know what that is. I assume the packing (IH) being circular, is installed so it wraps around the shaft. I staggered the openings, sort of like installing piston rings. I could straighten it and poke straight in, but I don't know what good that would do. Shaft has been greased, so that is not the problem. Started with 3 pieces in the old pump, ended up with 6, with the same result. Any ideas? I am overlooking something obvious.
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