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Old 01-24-2018, 10:16 AM   #1
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Fueling a 1999 mountainaire diesel freightliner chasis

When trying to add fuel to my 1999 Mountain Aire 37 Ď freightliner chasis front engine the fuel kicks back out and wont allow me to add fuel. Doesnít matter fast or slow or what orientation you have the nozzle. I just purchased it so have no history as the owner is deceased. And no itís not full itís showing 1/2 a tank and I have taken two short rides with it so itís down from full
Any suggestions would be greatly appreciated
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Old 01-24-2018, 10:40 AM   #2
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I'd be checking the tank vent.....
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Old 01-24-2018, 10:53 AM   #3
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Check the slope of the hose between the tank and inlet. On some there is no or very little slope. Newmar had a fix but it involved redoing the inlet to move it higher, not an easy fix. And, as was already posted, check the vent.
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Old 01-24-2018, 01:34 PM   #4
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That was my thoughts also. Thank you for the quick response
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Old 01-24-2018, 04:12 PM   #5
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I had similar problem on a 1997 Freightliner coach and it turned out to be a vent line that was a tad too long. The vent tube sagged and was holding fuel blocking the venting process. I shorten the tube to solve the problem.
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Old 01-24-2018, 05:15 PM   #6
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On some models, there is a sag in the fill tube creating a pool at the bottom like a P trap. A quick fix is to use a section of aluminum angle and attach it to the fill tube with hose clamps giving it a straight run with no dip.
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Old 03-27-2018, 09:44 AM   #7
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Thanks everyone
It was the fill hose with a kink. Fixed the kink and weíre good to go
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Old 03-27-2018, 10:51 AM   #8
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Congrats on the new rig! Glad you got the problem solved! Keep her between the ditches!

Good luck, happy trails, and God bless!
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Old 03-27-2018, 03:10 PM   #9
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Open the fuel cap on the side opposite the side you are using to refuel.
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