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Old 10-11-2011, 08:33 AM   #1
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Location: Washington, Utah
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Rusty Fuel Filler Tubes on '03 36MDDS

I just tackled the unenviable task of replacing the fuel filler vent hoses on my '03. During the process, I removed the metal fuel filler tubing that runs from the front inlets to the tank. Much to my surprise, once I got them out (not an easy chore) I found that the top surfaces had considerable rust and in a couple of spots were nearly rusted all the way through. There was even rust under the factory paint in several spots. I wire brushed the rusty spots with a wire wheel on a drill and then treated them with POR rust inhibitor followed by several coats of Rustoleum paint before reinstalling them. I recently purchased this coach in Florida and I expect it has lived most of its life there or on the east coast where rust is a problem. However, this may be something other Alpine owners may want to take a look at because it could have major consequences if left untreated.

Roger D.

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Old 10-14-2011, 12:58 AM   #2
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Pictures would be nice of exactly where, at the fuel filler neck or the tank end?

Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech
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Old 10-15-2011, 11:00 AM   #3
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Sorry to say I didn't take any photos Old Timer. Wish I had. Generally, the rusty areas were in the center section of the fuel filler tubing on the top surface where the vent hoses contacted the tube. It was pretty much the same on both the left and right filler tubes. Unfortunately, about the only way to really see this is to remove the filler tubes as there is very little clearance between the top of the tubes and the coach floor to really be able to see the areas of concern. There were also some old wasp nests up there and the beginnings of some sort of critter nest - maybe a mouse, rat or similar type rodent who had designs on making that their home (high and dry and safe!). I don't believe the rusty fuel filler tubes will be a problem for coaches who have grown up in areas that don't have high humidity and salty air. But, if anyone ever needs to replace their leaking vent hoses, it would be a good idea to inspect the tubes for rust as part of the operation. It certainly took me by surprise.
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