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Fuel cut off leaking

grandpa Love

grandpa Love

Well-known Member
Had our 640 for 3 years , never leaked a drop. Saturday evening at our church tractor show it started leaking alot out of the screw in valve under the tank. We never use that one because there is an in line cutoff. I closed the valve with a screwdriver and it stopped leaking. How do I fix this? Simple O ring? Thanks.
 
Yeah basically simple O-ring on the valve stem. Procedure goes something like this: Remove valve, drill or pry out stop rivet, remove valve stem, replace O-ring, make sure to use a type of O-ring that is resistant to gasoline, drill and tap rivet hole for 8-32 machine screw (from memory, I think that's the size), cut a stop screw such that it prevents the stem from screwing out all the way yet doesn't bind the stem, reinstall the rebuilt valve. This procedure has been discussed extensively, search for more details if needed. Unfortunately the seach function on YT doesn't always produce expected results.
 
How do I fix this? Simple O ring?
Click to expand...

In addition to Andy's excellent help, AWTX covered this repair in great detail [b:67d86ccaa9][color=darkred:67d86ccaa9]HERE[/color:67d86ccaa9][/b:67d86ccaa9] but unfortunately the links for pix are broken.

I saved the post when it was current as shown here:

mvphoto26127.jpg


I tried making it as large as I could but you may need to enlarge for greater detail.
 
Dollar and Andy thanks for the quick, simple answer. Sounds like a fairly easy fix. Something to tackle this weekend.
 
It is a Ford, they have to leak somewhere, my 6610 is like an old dog that pees somewhere all the time, rarely in the same place.
 
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