Carb Inlet Fitting

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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Stanton
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Carb Inlet Fitting

Postby Stanton » Wed Feb 19, 2020 9:43 am

The IH carb on my 1942 Farmall AV has this fitting on the inlet:
Image

The inlet to this fitting is 1/8 pipe thread (straight, not tapered) with a built-in ferrule. A 5/16" brake line with 1/2" fittings that we usually use for a Cub is too big for it. It appears from the built-in ferrule that this fitting is for a flared pipe end.

Is this the correct fitting? If not, what is?

Would appreciate any help from members with the knowledge of what's supposed to go in there. Thank you.
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indy61
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Re: Carb Inlet Fitting

Postby indy61 » Wed Feb 19, 2020 10:04 am

This is what the new replacements look like.

https://brillman.com/product/carburetor ... -strainer/

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Re: Carb Inlet Fitting

Postby Jim Becker » Wed Feb 19, 2020 10:18 am

The outlet should have pipe thread and a screen (inside the cardboard tube in Indy61's picture). The inlet should be identical to the inlet of a Cub carb (compression fitting).

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Stanton
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Re: Carb Inlet Fitting

Postby Stanton » Wed Feb 19, 2020 1:14 pm

Jim Becker wrote:The outlet should have pipe thread and a screen (inside the cardboard tube in Indy61's picture). The inlet should be identical to the inlet of a Cub carb (compression fitting).


That's fairly close to what I have. Here's a couple pics:
IMG_2200.JPG

IMG_2199.JPG


And here's the Brillman pic with what I'm missing in red:
InkedB9038-002-Web_LI.jpg


Wonder if you can buy just that piece without buying the whole thing? Will have to do some checking around...

Thanks!
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Don McCombs
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Re: Carb Inlet Fitting

Postby Don McCombs » Wed Feb 19, 2020 2:22 pm

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Re: Carb Inlet Fitting

Postby Jim Becker » Wed Feb 19, 2020 2:23 pm

I thought you had what was pictured in the first post. An adequate replacement for the nut comes on each end of most pieces of brake line. You just need a compression ring to go with each one.

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Stanton
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Re: Carb Inlet Fitting

Postby Stanton » Wed Feb 19, 2020 2:38 pm

Jim Becker wrote:I thought you had what was pictured in the first post. An adequate replacement for the nut comes on each end of most pieces of brake line. You just need a compression ring to go with each one.


The standard compression nut on the 5/16" steel fuel lines we all use for Cubs has an outside diameter of almost 1/2". The inlet diameter of this brass fitting is less than 7/16" (approx. 13/64"), so the larger compression nut won't work.


Don McCombs wrote:Here's what you need...

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


Thanks, but don't believe so, Don. Think that diameter and thread-count are the same as the 1/2-20 compression nut that comes with the standard 5/16" steel brake line; too big.

I'll keep looking...
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Don McCombs
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Re: Carb Inlet Fitting

Postby Don McCombs » Wed Feb 19, 2020 2:53 pm

OK. I missed that in your first post. I wonder if you can even use a 5/16 fuel line with what you have?
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Stanton
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Re: Carb Inlet Fitting

Postby Stanton » Wed Feb 19, 2020 3:04 pm

Don McCombs wrote:OK. I missed that in your first post. I wonder if you can even use a 5/16 fuel line with what you have?


Just going by what Steiner's sells, it states that it's a 5/16" fuel line with plain ends (I"m assuming 1/2-20 compression nuts and 5/16" ferrules):
https://www.steinertractor.com/IHS937?crawlparam&gclid=CjwKCAiA1rPyBRAREiwA1UIy8FwT0TsdEJJ0OtXMkYe8xP-bzD-q1jLBh22_1faZD6il0akgJe1jmxoCLlMQAvD_BwE
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Don McCombs
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1948 Farmall Super A
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Location: MD, Deep Creek Lake

Re: Carb Inlet Fitting

Postby Don McCombs » Wed Feb 19, 2020 3:39 pm

Let us know how you make out.
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Re: Carb Inlet Fitting

Postby Dale Finch » Wed Feb 19, 2020 5:03 pm

FYI, Steiner has two different "Carburetor Elbow With Strainer Assemblies", so if you are replacing the whole piece, make sure you get the correct one:
A 1/4" O.D. fuel line:
https://www.steinertractor.com/IHS966-Carburetor-Elbow-with-strainer-assembly-for-14-OD-fuel-line-
And the 5/16" O.D. fuel line:
https://www.steinertractor.com/IHS1124-Carburetor-Elbow-with-strainer-assembly

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Stanton
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Circle of Safety: Y
Location: Lone Jack, MO

Re: Carb Inlet Fitting

Postby Stanton » Thu Feb 20, 2020 7:29 am

Dale Finch wrote:FYI, Steiner has two different "Carburetor Elbow With Strainer Assemblies", so if you are replacing the whole piece, make sure you get the correct one:
A 1/4" O.D. fuel line:
https://www.steinertractor.com/IHS966-Carburetor-Elbow-with-strainer-assembly-for-14-OD-fuel-line-
And the 5/16" O.D. fuel line:
https://www.steinertractor.com/IHS1124-Carburetor-Elbow-with-strainer-assembly


Thanks, Dale. I missed that one. If my AV originally took a 1/4"OD fuel line, that could be why I'm having trouble finding a 5/16" sized one. The search continues... :hattip:
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