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Old 07-01-2022, 07:56 AM   #1
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Fuel Tank Leaking

1993 American Eagle on a Spartan Chassis. I've got a diesel fuel leak coming from the top of the tank WHEN THE GENERATOR IS RUNNING. There are feed and return hoses coming from the generator to hard lines that run up and disappear above the tank. It appears that these connections are not accessible without dropping the tank. It looks pretty straightforward to drop the tank, having only 3 straps holding it up. My concern is that if these connections from the hard lines are hard plumbed directly to the tank and the tank is dropped, I'll bend and ruin the lines. Does anyone know if there are hoses connecting these hard lines to the tank? How easy is it to drop the fuel tank? Are these connections accessible through the floor under the carpeting?
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Old 07-02-2022, 03:14 AM   #2
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I don’t have a direct answer - but my experience with gassers is there is always rubber hose at the top of the tank, and you use ratchet straps and bottle jacks to slowly drop the tank down once the permanent straps are removed. You drop down enough so you can see what your dealing with before dropping the tank all the way to the ground.

First tank I did to replace the fuel pump discharge hose that had disintegrated was a 60 gallon tank that probably had 50 gallons of gas in it.
Bought gas “cans” from WallyWorld and siphoned gas into them to get the tank weight down.
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Old 07-02-2022, 05:56 AM   #3
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Bluebird made a BMC model on a Spartan Mm chassis. I had a 95. Seems like generator and maybe AquaHot fuel lines are accessible from above, but you need to know exactly where they are and cut thru the floor. Maybe someone had been in there before and already cut the floor. What flooring do you have in the living area? On my coach, the fuel tank was directly behind the front wheels, not sure if yours is. I would think if you had to drop the tank, it would get expensive in a hurry. Good luck
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Old 07-02-2022, 08:48 PM   #4
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Quote:
Originally Posted by tdrees View Post
Bluebird made a BMC model on a Spartan Mm chassis. I had a 95. Seems like generator and maybe AquaHot fuel lines are accessible from above, but you need to know exactly where they are and cut thru the floor. Maybe someone had been in there before and already cut the floor. What flooring do you have in the living area? On my coach, the fuel tank was directly behind the front wheels, not sure if yours is. I would think if you had to drop the tank, it would get expensive in a hurry. Good luck


The area where the leak is just behind the front wheel and the area is carpeted , not sure if I could go thru the floor though, was thinking of dropping the tank but not sure of lines going to the rear and frt ?
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Old 07-06-2022, 03:54 PM   #5
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If you have HWH jacks, there is a stabilizing bar between them, under the 125G tank. The tank has a drain plug, makes it easy to completely empty the tank after pumping as much as possible first.
Going through the floor is not reasonable IMO, my coach has a 4" thick floor with an open space for wiring/plumbing, heating ducts,etc.
I think mrmark52 has the right method.
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Old 07-07-2022, 08:29 AM   #6
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Just a idea, but if the generator is running while leaking, it's the return line from generator to tank, can you see, or access the Cummins engine return line to tank? Is it rubber hose / nylon line? Possible to cut it and splice a T fitting for the generator and run the return from generator into same hose?

Otherwise, yes drain tank, you might be able to rent or use a transmission or motorcycle jack.to lower tank enough to access the lines on top.
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