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Old 11-12-2019, 01:38 PM   #1
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Diesel fuel filler problem

The inside threads on drivers side fuel filler neck are missing making it impossible to screw the cap back on. Pictures 1 and 2 are is the problem filler neck on the drivers side. Picture 3 is the filler neck on the passenger side.
2005 Beaver Monterey 400 C9 CAT
Is there a fix for this like an after market product?
Terry
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Old 11-12-2019, 01:58 PM   #2
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Looking at the gasket around the problem child looks like it's not the original. I am sure you can get a new filler neck for your tank. Just my shade-tree mechanic observation!!
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Old 11-12-2019, 02:31 PM   #3
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It looks to me like the filler neck is actually an insert that's somehow crimped onto the piping leading down to the tank. I bet the original insert was damaged and removed leaving an open pipe with no thread for the cap to screw onto. Then again, the whole neck may have been damaged and replaced. Those welds don't look like factory welds.


Unfortunately, I don't know how to fix something like that.
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Old 11-12-2019, 02:38 PM   #4
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I suspect itchytoe is right,the threaded insert is missing. This neck is usually a stand-alone part attached to a hose to the fuel tank. You might check with both visonerv.com and colawrv.com + RV Salvage and Surplus Outlets - used RV parts


I seem to remember a universal cap that did not have threads, instead it had ribbed rubber plug that was a tight fit, which might be a short-term solution.
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Old 11-12-2019, 02:40 PM   #5
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I don't have a clue! Noticed you are kinda new on the forum and wanted to say hello!

Good luck, happy trails, and God bless!
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Old 11-12-2019, 04:58 PM   #6
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Quote:
Originally Posted by Ray,IN View Post
I suspect itchytoe is right,the threaded insert is missing. This neck is usually a stand-alone part attached to a hose to the fuel tank. You might check with both visonerv.com and colawrv.com + RV Salvage and Surplus Outlets - used RV parts


I seem to remember a universal cap that did not have threads, instead it had ribbed rubber plug that was a tight fit, which might be a short-term solution.
Yes the threaded insert is missing which is puzzling because I have had this Beaver for 3 years without ever having a problem not being able to screw the cap back into the threaded insert. It was surreal after taking the cap off and filling the tank up ...only to discover minutes later the threads had disappeared...really crazy. Hopefully the missing threads are not in the fuel supply!
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Old 11-12-2019, 05:09 PM   #7
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The thread insert isn't still on the cap is it?
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Old 11-12-2019, 06:09 PM   #8
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^What he said.

It sounds like you may have just twisted the whole thing off. I don't think the threaded part would fit down the filler neck. Double check the fuel cap.
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Old 11-12-2019, 06:59 PM   #9
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My first thought is it is still on the fuel hose
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Old 11-13-2019, 12:07 PM   #10
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^What he said.

It sounds like you may have just twisted the whole thing off. I don't think the threaded part would fit down the filler neck. Double check the fuel cap.


Checked cap...nothing there
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Old 11-13-2019, 12:08 PM   #11
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The thread insert isn't still on the cap is it?


No sir not on the cap
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Old 11-16-2019, 12:51 PM   #12
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i googled filler neck diesel you need to get measurements but i guess they are a thing anyway.

https://www.fillernecksupply.com/thr...kaAgQREALw_wcB
https://www.fillernecksupply.com/fue...ne-NJ129888G2/

This place above seems to be the ticket .Scroll down for OD you may need a digital caliper from harbor freight Amazon I have two.
or get a buna N expandable plug from Mc Master Carr ect.
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