Gas Line At Fuel Bowl Leaking

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jim5644
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Gas Line At Fuel Bowl Leaking

Postby jim5644 » Fri Jul 09, 2021 8:21 pm

Would somebody be kind enough to help me with a problem. Took the hood off a 1970 IHC Cub and now I can not get the gas line fitting at the fuel bowl to stop leaking. IT has an odd type thin brass or copper washer and then the nut to attach the line to the fuel bowl. There is no barrel type compression fitting on the line just the little thin washer and the line will just not stop leaking. Could I use a barrel type compression fitting at fuel bowl? The other end of the metal line that goes to the carb does have a barrel compression fitting. The little thin washer will only fit on the very end of the line and that is with a lot of pressure.
Appreciate any help and you guys have saved me before.

Bob McCarty
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Re: Gas Line At Fuel Bowl Leaking

Postby Bob McCarty » Fri Jul 09, 2021 9:06 pm

There usually is a compression fitting at the sediment bowl. I can't visualize how yours is set up. Shouldn't be any problem to switch to a compression fitting. TM Tractor sells them with the ferrule, 1/2-20 thread, not pipe thread. http://www.tmtractor.com/new/fl/512fp.htm
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jim5644
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Re: Gas Line At Fuel Bowl Leaking

Postby jim5644 » Fri Jul 09, 2021 9:49 pm

Bob, the fitting at the fuel bowl is the 5/16 line fitting, but it has a thin maybe 1/16 inch thick brass or copper almost like a washer. The other end to the carb does have a barrel feral and the line nut. Just want make sure I can get away with using a barrel feral on the fuel bowl before I mess something up.

Appreciate any advice as I've never seen another set up like this either.

tldec50
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Re: Gas Line At Fuel Bowl Leaking

Postby tldec50 » Sat Jul 10, 2021 3:56 pm

Maybe someone put a flare on that end and it has broken off.

jim5644
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Re: Gas Line At Fuel Bowl Leaking

Postby jim5644 » Tue Jul 13, 2021 11:56 am

Thanks tldec, but whatever the apparent washer type thing is it was designed to be what it is. It appears to be something especially designed to function with the line nut at the fuel bowl. It definitely is not the end of a flare on the end of the line.
I appreciate your help though and thought.

tst
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Re: Gas Line At Fuel Bowl Leaking

Postby tst » Tue Jul 13, 2021 2:19 pm

they did use a kinda thick copper washer before replacing them with the common ferrule that is used now, you can just toss the washer and use the ferrule that is what IH also did in the replacements

jim5644
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Re: Gas Line At Fuel Bowl Leaking

Postby jim5644 » Wed Jul 14, 2021 6:48 pm

tst thanks so much for you help and advice. Was beginning to think I had a one of a kind thing.
Appreciate your help.

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Re: Gas Line At Fuel Bowl Leaking

Postby SamsFarm » Wed Jul 14, 2021 7:02 pm

How about posting some pics.

Everyone might be able to help you better!
1968 Cub fast hitch

jim5644
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Re: Gas Line At Fuel Bowl Leaking

Postby jim5644 » Thu Jul 15, 2021 12:45 am

SamsFarm great idea about posting a picture, but I don't know how to do that.
In any case I finally got it to stop leaking and unless it starts leaking again am not about to take it loose. Finally rigged it up by putting an o-ring between the washer and the line nut and tightening it. If it starts leaking again will put a barrel ferrule on it as tst suggested.
Thanks for your suggestion and will try to figure out how to do a picture on future problems.

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Re: Gas Line At Fuel Bowl Leaking

Postby Glen » Thu Jul 15, 2021 1:12 am

Hi,
Below are listings at TM Tractor.
The 1st is a new gas line for Cubs with under axle exhaust systems, which the 1970 Cub you have probably has. You can look at the pics.

http://www.tmtractor.com/new/fl/373fp.htm

The 2nd listing shows the nut for the gas line, like Bob posted above.
When it is new, it will slide on the tube, then when you tighten it in place the 1st time, the ring shrinks some on the tube, so it is tight on the tube, and breaks loose from the nut. After that, the nut will turn on the tube, but the ring is tight.
That is how the ones I bought worked, I guess these work the same way. :)

http://www.tmtractor.com/new/fl/512fp.htm

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Stanton
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Re: Gas Line At Fuel Bowl Leaking

Postby Stanton » Thu Jul 15, 2021 6:36 am

jim5644 wrote:SamsFarm great idea about posting a picture, but I don't know how to do that.
In any case I finally got it to stop leaking and unless it starts leaking again am not about to take it loose. Finally rigged it up by putting an o-ring between the washer and the line nut and tightening it. If it starts leaking again will put a barrel ferrule on it as tst suggested.
Thanks for your suggestion and will try to figure out how to do a picture on future problems.


To answer your earlier question, no, you won't mess anything up by putting a compression fitting on that end of the gas line (just like the other end). As Bob stated, be sure it's a 1/2-20 thread count and not a plumbing fitting.

Here are a couple references describing attaching photos to a post:
How to Upload Pictures to a Post
Forum Picture Posting And Other Interesting Things You Can Do

Also, you might find this helpful thread in the How To Forum: "How to Make a Steel Gas Line for Your Cub"
Stanton
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jim5644
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Joined: Tue Jul 14, 2020 7:15 pm
Zip Code: 28173

Re: Gas Line At Fuel Bowl Leaking

Postby jim5644 » Thu Jul 15, 2021 12:37 pm

Thanks everyone for all the advice and help. It is go great to have this forum and everyone so helpful
Thanks again and hope everyone has a fantastic day.
Have a good solution now if the problem returns.


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