HD6 Rubber Fuel Lines
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=197677
Printed Date: 23 Nov 2024 at 2:04pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD6 Rubber Fuel Lines
Posted By: DieselBumpkin
Subject: HD6 Rubber Fuel Lines
Date Posted: 12 Oct 2023 at 4:15pm
| I have a 6000 motor that needs new rubber fuel lines. The old ones are the originals with the cotton jacketing that has been painted over. I took a few apart, and the fittings look like screw-on hydraulic fittings, but the diameters don't make sense. It looks as if a -8 nut is paired with a -6 inside part. Did AC have custom fittings made for extra thick hoses? |
Replies:
Posted By: Coke-in-MN
Date Posted: 12 Oct 2023 at 10:58pm
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Lot of the older AC hoses used Air Quip fittings , were replacable hose fittings and ends were reused on new hoses . Finding the hose is not easy so full replacement is sometimes easier , with factory ends already crimped to hose . ------------- 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." |
Posted By: DieselBumpkin
Date Posted: 12 Oct 2023 at 11:24pm
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Are the Aeroquip fittings which you are referring to the crimp type or the hydraulic screw type? I did a search before I posted, and I saw some post from around March of this year about a HD5 where the fittings were deemed unobtanium and the solution was to reuse the fitting but put a hose clamp on it or something. The fittings in his picture(s) look a lot different from mine. Mine are like the Parker 30 or 42 series fittings where you can put everything back together with a vise and a good flare nut or box wrench. One of the HD6 parts list books calls out the connector as being made by Sealastic. The NWO-run search engines like Google and Startpage are giving me total garbage results, but from what I can tell, the company has/had some relation to Detroit Diesel. I may just try to make due with what I have. I tried enough hydraulic hose variations that I think that I can make something work. It looks like 1/8, 1/4, 3/8, and maybe 1/2 NPT threading being involved along with -4, -6, and -8 fittings. They don't have to be tight like hydraulic lines, but at the same time, they have to not leak. My guess--and this is just a guess--is that AC overbuilt the fuel lines using hydraulic hose to make them long-lasting before steel braid fuel lines were a thing.
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Posted By: Codger
Date Posted: 13 Oct 2023 at 5:44am
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This braided fuel line is SAE100R5 series hose and is available in a plethora of sizes. It is much more expensive than standard hydraulic hose which is not DOT certified. SAE100R1 series hose is what I usually replace it with.
Much of what I've done on my own trucks is use Parker 801 "Push-Lok" hose on the low pressure side of the fuel system. ------------- That's All Folks! |
Posted By: Coke-in-MN
Date Posted: 13 Oct 2023 at 8:33am
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I used Parker replacible ends on small hydraulic lines as I use to stock them at Mfg company I serviced . They were a non skive fitting that you threaded onto hose outer cover - then it was threaded to accept a incert that expanded hose into unit. On my HD5G - I ended up replacing all the Aeroquip fttings with NPT threaded 2 braid hose from Fleet Farm , which called for making up fittings to attach to existing steel lines on machine . Lot of those steel lines also seem to have patches brazed to them after 65 years of service . Fuel lines aso replaced with NPT pipe thread fittigs in 1/4" size . ------------- 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." |
Posted By: CAL(KS)
Date Posted: 13 Oct 2023 at 9:07am
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i replaced many of mine with hyd hose and npt fittings after the fire. ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: DieselBumpkin
Date Posted: 13 Oct 2023 at 3:53pm
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Codger wrote: