[SEL] Fuel pump repair.....

bill at antique-engines.com bill at antique-engines.com
Mon Aug 7 11:19:01 PDT 2006


Stuff like this is what it's all about. Cool
Thanks.

Bill


 Guys, here is a shade tree repair to get your fuel pump up and running.
>
> I had a fuel pump in which the pair of checks valve didn't. The outlet I
> was able to rehone and get sealing again by making a tool using a .50
> diameter ball and welding a piece of 1/8" rod to it. Then using some
> fine diamond lapping paste (15 micron and then 5 micron) and the tool in
> a hand drill, lapped the seat to match the ball diameter. Testing with a
> new ball showed it sealed nicely.
>
> However, the input side seat was almost gone and the ball was almost
> ready to drop thru the seat. Using a larger ball was not an option as it
> would be larger that the cap threads over the ball. My first thought was
> to fill it with Babbitt and recut the seat, but I had no Babbitt at the
> house. So I decided to use electronics solder instead. First using a
> small dremel tool I cleaned up the seat to make it brite so the solder
> would tin to the brass body. The I made a wooden plug from a dowel that
> would keep the solder out of the pipe threads underneath, and that would
> keep the cavity under the ball open. This plug was tapped in.
> A bit of flux was added, the body heated with the torch and the entire
> seat area filled with solder to be flush with the seat. Once cooled, a
> transfer punch tool was used to give a starting location. The hole was
> drilled larger and larger in steps until about 5/16" diameter. Then a
> 1/2" drill was used just a little to form a crude seat. Then a 1/2" ball
> was dropped in and then tapped with a brass rod and hammer. This formed
> a perfect spherical seat in the soft solder. All the was done with hand
> tools in a bench vise and was done in a half hour.
>
> I haven't a clue how long the repair will last, but for now it is
> working great and the pump seals and keeps up with the engine. Thought
> you might want to file this one away in your bag of tricks so save an
> otherwise shot fuel pump.....
> See ya,
> Curt Holland
> Gastonia, NC
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