Racor primary fuel filter leak

[Fred Brooks]

   Greetings,
 I have been chasing a fuel seepage issue for the last year. I performed the Racor upgrade replacement along with 4 o-rings. This includes the 2 that came with the kit and the 2 that they don't know anything about. Gerald Ferris gave me a heads up on those O-rings #114. Well as it turns out, The H20 purge tubing had dried out and become very brittle after 21 years. The crack in the tubing was up at the fitting where it attaches to the purge solenoid. (see the arrow on the picture) no possible way to find this with out removing the whole assembly away from the wall. Hope this helps, Fred
 

[Eric Maclean]

Fred
On my coach I just unscrewed the two Allen headed machine screws ( you can see I your picture) that hold the solenoid valve in place and dropped it out from below. There was just enough wire to allow the solenoid go be brought out to where you can work on it.

Eric

[Fred Brooks]

    Eric,
I am well aware of the 2 allen screws that retain the solenoid. The issue I was dealing with was the 1 drop of diesel that took 48 hours to appear which was hidden back behind the housing. That is why I removed the 2-1/4-20 bolts so I could see behind the housing. My point is there are many older units like ours that need that purge line replaced.
   Respectfully, Fred

[Eric Maclean]

Fred
Your right
the line on mine was almost crystalized from age.  I thought that likely the diesel fuel didn't like the plastic much but maybe it's just age as the ice maker line went the same way.

On my unit I still had a very small seepage from the upper "O" rings on the sight glass after changing the sight glass and all the O rings I ended up using a drop of liquid hydralic sealer on the O ring surfaces to seal it better.
The seepage would take close to a week to appear making it all but impossible to track down I originally thought it could be the water purge line but eliminated that by removing the sediment bowl and spinning a regular filter on in place of the Raycor temporarily . That allowed me to diagnose the leak and replace the purge line while I was at it .

I amagin with the age of these units now the purge line on all of them need to be replaced .
Because of the location of these units ( lower than the fuel tank) if the line where to break off the entire 100 gallon fuel tank could and likely would syphon out onto the ground creating a terrible  mess possibly with environmental and legal consequences if not caught quickly enough.

Thank you Fred for bring it to our attention

Eric