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HD5G Fuel Guage Pressure Line
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Les Kerf View Drop Down
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Joined: 08 May 2020
Location: Idaho
Points: 783 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Topic: HD5G Fuel Guage Pressure Line
    Posted: 13 Aug 2024 at 8:02am
The fuel line going to the gauge blew out on my Son-in-law's HD5G. Our local NAPA store that usually supplies our hydraulic stuff told us they don't have the appropriate line or fittings to build a new piece for us.

Any recommendations are welcome.
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Codger View Drop Down
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Joined: 23 Dec 2020
Location: Utopia
Points: 2041 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 13 Aug 2024 at 11:07am
I've usually ran a 1/8" copper line with compression fittings to a Stewart-Warner gauge if that is what you have. I think I have a copper line "kit" for this at the shop also. I'll see if I can locate it yet this afternoon. I remember purchasing, but don't remember using it. 
That's All Folks!
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Les Kerf View Drop Down
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Joined: 08 May 2020
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Points: 783 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 13 Aug 2024 at 12:51pm
Originally posted by Codger Codger wrote:

I've usually ran a 1/8" copper line with compression fittings to a Stewart-Warner gauge if that is what you have. I think I have a copper line "kit" for this at the shop also. I'll see if I can locate it yet this afternoon. I remember purchasing, but don't remember using it. 

I'm pretty sure this is the original gauge (which still seems to work fine) and they used a unique fitting that none of our local shops have been able to match thus far. Son-in-law told me today that it sprung the leak because it rubbed on something, we are thinking about just cutting it and putting in a barbed coupling with hose clamps. The pressure is well under 100 psi on this application and the remainder of the hose looks serviceable.
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Ray54 View Drop Down
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Joined: 22 Nov 2009
Location: Paso Robles, Ca
Points: 4544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Aug 2024 at 4:16pm
The big swivel nuts on the fuel line have SAE NF treads the same as bolts. If you carefully use a cut off wheel on 4.5 inch angle grinder you can cut the old crimp off.  There are barbs on the existing brass,copper, bronze what ever it really is on the fitting. Just use the appropriate  size fuel hose, and a clamp.

If your close to original the extra fitting in there is to take the pulsing out so gauge is not jumping the neddle as much.
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41600 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 14 Aug 2024 at 9:07pm
The fuel line is braided with a fitting that is hard to match . 
Also as the fuel system pulses as injector operate , a restrictor is needed in line to stop pulses registering on gauge , this can be as simple as a restrictor fitting with something like a 1/16 hole in a plugged fitting . 
 I used a commercial snubber fitting to stop pulses which has a internal piston as well as flow restriction . 
 Oil lines to gauge and to filters use the same fitting to terminate the lines , again with the bypass filter system a restrictor is needed in those lines also to meter oil going to filter and to engine itself 
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41600 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2024 at 11:11pm
The AC fuel gauge has a round diaphragm on back that acts like a snubber to limit pulsing . If replacing with another gauge is where the problem comes - otherwise braze a new fitting to back of old line fitting and make new line  
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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Les Kerf View Drop Down
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Joined: 08 May 2020
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Points: 783 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2024 at 12:10pm
Thanks all for the input, life has temporarily intervened and I have had to postpone this project; I hope to get back to it in a week or so.
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