Re: Old Fuel Lines Reply #50 – February 21, 2014, 11:21:20 am Good info! I could be wrong, but it seems to me that the plastic lines likely have less internal friction to the passage of fuel and therefore a somewhat smaller diameter may be required with the old style. They told me that this is the same line they use on the IH45's (ISX's). I took that to mean the same diameter, but I could be wrong about that to... DonQuote from: rsihnhold – February 20, 2014, 05:48:50 pmJust to keep this information in one spot for anybody thinking about doing it themselves, all the ports on the top of the fuel tank for both supply and return are 1/2" NPT female connections with a 90 degree male NPT to flare fitting installed.The supply for the Cummins has a 5/8" flare connection on it with the Aeroquip 2556-10 hose and all others are a 3/8" (flare 37 degrees) or -6AN flare fitting with Aeroquip 2556-6 hose. Connections at the primary and secondary fuel filters were also 5/8" flare.I find it interesting that on J.D.'s coach that FT replaced the 2556-10 hose (0.63" or 5/8" inside diameter) with the Parker HTFL 10B hose which is less than 1/2" ID at 0.441". While some parts of the hose look fine, other areas have visible diesel permeation and plenty of cracking. The worst offender is the line between the primary and secondary fuel filters on the Cummins, the return fuel line, and pretty much everything on top of the fuel tank. Everything that was enclosed in the ducting and protected (barring the fuel tank area) shows no signs of permeation. Quote Selected
Re: Old Fuel Lines Reply #51 – February 21, 2014, 11:23:58 am Quote from: John Haygarth – February 21, 2014, 10:56:24 am Peter, I could be wrong but seem to remember someone saying that the older GVs do not have the same type of lines and do not break up like the later models. Sure someone will correct me if I am wrong.JohnHPeter, Here's what I found on my '91: When new fuel lines? Quote Selected
Re: Old Fuel Lines Reply #52 – February 21, 2014, 09:55:56 pm Quote from: prfleming – February 21, 2014, 10:03:34 amOn our '91 I'm sure the fuel lines are original and this thread got me thinking. I didn't see a reply on the cost to have FOT do the replacement...can someone prepare me for what we might be in for please...you can put it in terms of "coach bucks" Two coach bucks at FOT. Another owner reported to me that they had spent five coach bucks for fuel line replacement at a big brand truck/engine shop.As others have reported, this issue seems to be showing up in models built in the later '90s. Ours is a 1997. First symptom for us was that the generator would not run. It would start after filter was purged of air, but would immediately shut down and filter would again have air in it. Quote Selected
Re: Old Fuel Lines Reply #53 – February 22, 2014, 06:27:50 am Mine was 3100 at FT to replace all the lines. It was 22 hours of labor and parts and tax. I have the metal beam in the drivers side so the could only work from one side. It took two days with three people and probably a lot more than 22 man hours. Quote Selected
Re: Old Fuel Lines Reply #54 – March 01, 2014, 06:46:58 pm I have finished the project and it wasn't for the faint of heart. I removed the propane tank and thought that I would be able to get at the center of tank connections for generator and engine supply. I could see them but there were so many other hoses/etc. that ran through the access slot that I just couldn't get enough access to get them off or put the new fittings back on. I was really, really hoping I could get it done without removing the fuel tank but it didn't work out that way. I drained the 60 gallons of fuel into 2 plastic barrels I had and pulled it out. The empty fuel tank is surprisingly light but do be aware that there is a drain plug on the bottom drivers side which will prevent you from being able to push the tank straight out until it has been lifted a bit. Don't ask me how long it took to figure out what was holding everything up. The curb side fill spout will also catch on pretty much every hose and wire loom as you try to push it out.Here are the barbed connectors that I used with the Trident 365 hose. They haven't leaked at all and fit nicely into the hose. Just dip the end of the hose into hot water for 30 seconds prior to pushing the barb in. Anderson Metals Brass Push-On Swivel Hose Fitting, Connector, Barb x Dual SeatMy engine supply hose was extremely cracked and deformed at the tank connection. It had been visibly leaking which you could see with the tank removed. There was a film of diesel all over the top of the tank near the supply connections. This was not something you could see until the tank was removed. The engine runs noticeably smoother after changing out the fuel hoses, as does the generator. Quote Selected As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Topic: Old Fuel Lines