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Topic: Correct fittings for fuel hose replacemant (Read 978 times) previous topic - next topic

Correct fittings for fuel hose replacemant

We're going to be replacing the fuel lines here shortly and I am trying to gather all of the necessary  parts before we begin.  I am going to be using the Trident Barrier Lined A1-15 hose that I've seen mentioned by a couple of forum members.  I am going to be using 1/2 and 3/8 I.D. inch hose to replace the existing hoses which are 0.41" I.D. for the engine supply, 0.31" I.D. for engine return, and 0.38 for the generator fuel lines.  There is a fifth 0.38 I.d. hose coming from the fuel tank that I'm unsure of where it goes but will replacing also.

My question is in regards to the fittings that we will need.  I am going to need flared swivel fittings at the fuel tank and the engine but don't know which ones are correct.  The fittings that I have found that look most similar to OE are Parker 22 Series  hydraulic fittings, but I don't know if I'll need the JIC 37 degree flare or the 45 SAE flare. 

Does anyone knows if those are the correct style of fittings and/or what the correct flare is, or how I could go about figuring it out?

I have attached a couple photos of the original fittings.

Thanks in advance,
Tyler
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #1 –
Link below shows the visual difference between the two types.  You might be able to eyeball the fuel tank male fittings and verify type.

Air Dryer Bypass Demo
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Correct fittings for fuel hose replacemant

Reply #2 –
Those fittings look like the are reusable.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Correct fittings for fuel hose replacemant

Reply #3 –
I agree, it looks like your fittings are re-usable, but I am not certain they can be used with push on type hose.  Perhaps others with more experience will chime in.  Your fittings are are different than the push on type fittings on our 1997 which are also re-usable.

The fittings on the tank of our 1997 are  45deg SAE.  I re-used all but one.  I thought they were 37 deg JIC, but they are not.  Ordered two different JIC sizes (3/8 and 1/2).  One was too small so placed a second order and it was too large.  Started assuming it was SAE but was not certain.

Ended up taking the tank fitting off (had to heat it to get it to break loose) and going to a local supplier and said I want a straight swivel by 3/8" hose barb (generator return line) to mate with the fitting.  Guy told me it was  number 6 SAE and he was out of stock on swivels...only had JIC, so I ordered from Grainger and pick it up Monday.    Barbed Hydraulic Hose Fitting, Fitting Material Brass x Brass, Fitting Size 3/8 in x 3/8 in.  AEROQUIP, incidentally, is the brand of hose I pulled out.  I also re-installed the Trident.

There is a gauge to measure 37 vs 45, but it is almost $100.  My eyeball and experience are not good enough for an accurate assessment, but the guy at the part store knew without hesitation....said he had been doing it for over 30 years.

By the way, I also learned fitting go by "dash" or "-" sizes which are often printed on the hoses too.  Dash 6 is 3/8, etc.  Google will provide a complete list.
40ft 1997 U320

Re: Correct fittings for fuel hose replacemant

Reply #4 –
I used the old fittings with push on tubing. Great fit and put a tyrap on it too like B Beane
Johnh
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
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jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Correct fittings for fuel hose replacemant

Reply #5 –
I will do some Googling to confirm, but I think the fittings in the picture are for braid covered hose like also shown in the picture.  The Trident hose is not braid covered, so I think it will require a different style fitting.  Not in my area of expertise, so will see what others and Mr Google say.

This page has good photos and a video referencing AN fittings which as I understand it is similar to JIC but made to a higher specification.
AN Hoses and Fittings Guide — Kanga Motorsports
40ft 1997 U320

Re: Correct fittings for fuel hose replacemant

Reply #6 –
Some great information, thanks everyone!  The current fuel hoses are all Aeroquip products, the engine hoses are braided and the generator hoses are rubber.  The fittings may be reusable but I prefer to replace them.  If the barbed style fittings are available I might go with them, they're cheap enough to buy a couple variations to make sure we get the right ones.  The fittings on the tank are a little too far back for me to reach without sliding the tank forward and we're not quite to that stage yet. 
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #7 –
This is what I learned from when I replaced my fuel hose regarding fittings.

I would, if doing it again, I would re use the original brass fittings, and buy the hose from the same company as the original, Eaton Aeroquip.  That would be an Aerpquip hose designed for those barbs and current diesel fuel.  That is because now I realize how high quality these fittings were, and the town I lived in had an Eaton Aeroquip hose dealer.  Heavy Duty Truck & Industrial Parts | Sales, Repair, Service | Myrmo

The Eaton Aeroquip website will give you your closest distributor. Where to Buy | Eaton PowerSource to Buy&gclid=CjwKCAiAq8f-BRBtEiwAGr3Dgdx08bkwVNQY9onTH3NNiA5ursXIrs4Jb_pijXw1LVnxA52tDpsTEhoCxMYQAvD_BwE

I ended up using Gates hose with steel crimped on fittings, all made by Gates.  I was fortunate that the hydraulic hose shop warned me of carefully tightening steel fittings on to brass fittings.  This is because brass is softer, and over tightening can easily damage the fitting. 
97 U295 40, Build #5040, 6C8.3 325 HP
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Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
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Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan

Re: Correct fittings for fuel hose replacemant

Reply #8 –
I might have to try and reuse the fittings for the 1/2 line.  I'm not having any luck finding -8 fittings that are SAE - Hose Barb.  Grainger has 1/2 in JIC but not in SAE.  It has me wondering if the 1/2 might be JIC, guess we're going to have to pull the tank to know for sure.
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #9 –
Quote from: The Soft Boulders –
I might have to try and reuse the fittings for the 1/2 line.  I'm not having any luck finding -8 fittings that are SAE - Hose Barb.  Grainger has 1/2 in JIC but not in SAE.  It has me wondering if the 1/2 might be JIC, guess we're going to have to pull the tank to know for sure.
Only way to know for certain is to pull the tank and fitting.  The cut sheet makes it seem like there is a 4797 universal SAE/JIC fitting.

40ft 1997 U320

Re: Correct fittings for fuel hose replacemant

Reply #10 –
Quote from: The Soft Boulders –
I might have to try and reuse the fittings for the 1/2 line.  I'm not having any luck finding -8 fittings that are SAE - Hose Barb.  Grainger has 1/2 in JIC but not in SAE.  It has me wondering if the 1/2 might be JIC, guess we're going to have to pull the tank to know for sure.

You might try different hydraulic hose stores in your area.

If you are in the Tulsa, Oklahoma area the following may help.
tulsa oklahoma hydraulic hose - Google Search
97 U295 40, Build #5040, 6C8.3 325 HP
Oregon Continuous Traveler
Samsung Residential #RF20HFENBSR,
Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
Extreme Full Body Pt w/hdlmps, new furn/floor, 4 down Lexus 2004 GX470 AWD curb weight 4,740 lbs
Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan

Re: Correct fittings for fuel hose replacemant

Reply #11 –
I currently live in Edmond OK. I know American Airlines has their depot facility there. Must be many places to get Aeroquip fittings of all sizes since airlines and civil aviation uses them. If the previous suggestion doesn't pan out, try an aviation parts supply business as well.
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Re: Correct fittings for fuel hose replacemant

Reply #12 –
I used Trident hose and push loc fittings, no clamps. AN style fittings. I reused all my old fittings.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Correct fittings for fuel hose replacemant

Reply #13 –
Would something like these Summit Racing AN fittings work if I can't get the OE fittings to work?  There's so many different variations of hose and fittings, I'm starting to lose track.  This is one of the bigger projects on Pearl that we've attempted and I'm a bit nervous ha.
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #14 –
We're not in Oklahoma anymore, we'll be in Carrizozo, NM until April and we're quite a ways from any place that would have a selection of fittings.  I appreciate everyone's input.
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #15 –
If you have to there is a hydraulic hose shop in Roswell on S Main just down the street from NAPA. (corner of 380 and 285)  When we are out at our place in Queen Roswell is the go to place for most supplies.

Pamela & Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Correct fittings for fuel hose replacemant

Reply #16 –
Quote from: The Soft Boulders –
Would something like these Summit Racing AN fittings work if I can't get the OE fittings to work?  There's so many different variations of hose and fittings, I'm starting to lose track.  This is one of the bigger projects on Pearl that we've attempted and I'm a bit nervous ha.

Hope you are enjoying Carrizozo.  I love the cherry and raspberry juices from that area.

My understanding is JIC and AN fitting are dimensionally identical with AN being made to a more exacting tolerances for aircraft use, ect, so JIC and AN fittings should be interchangeable.

I believe the fittings in your link are for braided style hose (the additional info section states Hose Style: Summit braided nylon; Summit premium braided nylon; Summit stainless steel braided.)

If you are using Trident A1-15, I believe you will want the push on style fittings.  Just based on the catalog sheet, not personal experience, it appears the Eaton Areoquip 4797 series fittings are designed with a dual seat to be compatible with JIC 37 deg and SAE 45 deg.  Wikipedia indicates JIC/AN and SAE share the same thread size for hose dash sizes 2, 3, 4, 5, 8, 10, 14, and 16, so with the exception of -6,  I believe you can use 4797 series JIC 37 deg female fittings even if the mating surface is SAE 45 deg.
40ft 1997 U320

Re: Correct fittings for fuel hose replacemant

Reply #17 –
I ordered two of the Aeroquip 4797 fittings in -8 to have on hand, I can get -6 fittings at the Napa in Alamogordo if need be.  My plan is to raise the bus, remove all of the bolts holding the tank in and then let the suspension back down again.  The wind can really get to ripping through here and I don't want to be dead in the water, sitting on stands with the suspension stuck at max height.
Hannah and Tyler Phillips
1993 U280 Grand Villa AKA Pearl
Basement Air
Cummins 6CT8.3
Build Number 4196

Re: Correct fittings for fuel hose replacemant

Reply #18 –
Seems like all models are a little different, so your hose sizes could be different than ours, but the engine supply on our 1997 is 5/8" (-10) and the return is 1/2 (-8).  The generator supply and return are 3/8 (-6).

Like you, I raised and blocked the coach for most of the work as it make access to the underside easier for pulling the hose at the rear.    I used a portable air compressor to fill the coach tanks via air aux hose which is plumbed to the wet tank to raise/lower as needed.

I also tilted the coach to one side to help in pumping out the fuel.    Just a reminder, there might be a drain plug.  If so, the tank needs to be lifted about 3/4" before sliding it out....I elected to not remove the drain plug...just pumped the tank as low as possible.

Good luck on your project!
40ft 1997 U320