chrisgreenup

Sorry about the blank post!
I'm gettting ready to change out feed and return fuel lines from Engine to Tank, Thanks for all the info I recieved from everyone, especially Infidel for all the great links and information!!!!
I just got some hose from House of Hose EVCO they sent me Gates 30R7 but wanted to make sure it would be ok to use before I went to the pain to get in on the truck. I found this link to Gates and a PDF file could'nt figure out how to insert it on this post but here is the link a little long but worth checking out! If someone can figure how to upload it to the DTR it might be helpful to others.

http://www.gates.com/common/download...chtipsform.pdf

Gates recommends using the 30R9 hose and 30R10 in the tank.
Which brings me to my next Q! how do you replace to the fuel feed supply line inside the tank?
I can reach it easily enough but just wanted some help from someone who has replaced this line. also is there a filter or screen that can be replaced on the fuel sensor in the tank?
Back to the hose. I will call House of Hose on Mon. to see if I can get the 30R9 from them. and 30R10 for tank!!
Has anyone else used the Gates hose for the fuel lines? If so has it held up well?

infidel

By reading the Gates page it seems like they are saying that on the one type of hose only the inner wall that contacts the fuel is resistant to fuel. If you stick it in the tank the outside of the hose might turn funny on you.
Seems that either type of hose would be ok outside of the tank.
I always use Trident #365 hose http://www.tridentmarine.com/stage/fuel.htm
but have never replaced an in the tank line.


Here's the Gates pdf

Avoid comebacks, install permeation-resistant fuel line hose

Fuel line hoses carry gasoline from the tank to the

fuel pump, to the fuel filter, and to the fuel injection

system. While much of the fuel lines are rigid tube,

sections of it are made of rubber hose, which

absorb engine and road vibrations.

There are two basic types of fuel hose: Fuel and oil

hoses that meet the SAE 30R7 standard, and fuel

injection hose that meets the requirements of SAE

30R9.

Standard fuel and oil (SAE 30R7) hose is rated for

low-pressure applications at 50 psi working

pressure up to 3/8" size, and 35 psi for sizes over

3/8". This general-purpose hose contains a light

reinforcement, and the rubber materials can be any

compound that is suitable for fuel, oil and vapors.

However, Gates Corporation engineers warn

installers that fuel formulations at many US

refineries are constantly changing as proprietary

blends are introduced according to government

mandates and seasonal influences. At times, more

aggressive fuels can extract the oils that give SAE

30R7 hose its flexibility. The result is a brittle, stiff

tube that will greatly reduce the performance and

service life of the hose.

Fuel injection (SAE 30R9) hose or MPI (multi-port

injection) hose is reinforced to handle higher

pressures up to 180 psi. It can be used on all

injection systems that use hose clamps. It is not

designed to replace coupled assemblies on fuel

injection systems.

Fuel injection hose is designed for low permeation

contact with a wide variety of alcohols, alcohol fuel

blends, and diesel fuel. It allows 15g/m2/day

permeation whereas standard SAE 30R7 hose

allows 550g/m2/day. (Gates fuel injection hose

routinely performs at 1 to 2g/m2/day of fuel loss,

well below the allowable standard.)

Gates SAE 30R9 hose uses a laminated tube of

Fluoroelastomer, as a thin wall inner layer backed

by traditional compounds. This first layer protects

the rest of the hose from attack, swelling or

permeation from aromatics, oxidized gasoline (as

can occur in fuel injection systems), ethanol or

oxygenate additives and a wide range of petroleum

based products.

The laminated tube will resist cracking caused by

"sour gas," which forms when unused gas is

returned to the fuel tank. As an added benefit, this

hose construction reduces emissions because fuel

can't evaporate through the hose walls.

SAE30R9 hose is also recommended for diesel

fuel because its fluoroelastomer tube resists

deterioration caused by some diesel fuel additives.

As refineries produce cleaner fuels and lower

allowable permeation rates during the “vehicle at

rest” condition, older hose specifications such as

SAE 30R7 are becoming less reliable. This type of

hose is no longer specified on OEM automotive

fuel applications because of stringent permeation

standards.

Therefore, Gates engineers assert that the best

choice for automotive fuel line hose applications

today is fuel injection SAE30R9 hose. For

installers, it is the best choice for reduced

comebacks and for high performance, assured

trouble free service in a changing fuel environment.

Finally, for submersible applications such as on the

in-tank fuel pump, only SAE30R10 hose should be

used, because when the hose fails, the pump will

fail. Hose construction consists of low swell

fluoroelastomer compounds in the tube and cover

that resist gasoline and diesel fuel permeation and

aging. Standard hoses have these fuel-resistant

characteristics in the tube portion only.

Contact your Gates jobber for information on Gates

MPI/fuel injection hose and submersible fuel line

hose.

Gates Corporation

PO Box 5887, Denver, Colorado 80217

chrisgreenup

Looks like the Gates 30R10 is designed to be submerged.
Trident looks like a superior hose overall.
Can you buy the lengths you need from Trident?
I was a little disapointed when I got the hose from House of Hose. I was hoping they would have sent a diesel rated hose when I asked for it! This Gates 30R7 seems to really only be rated for gas even by the discription the Gates company provides. I asked for a diesel Marine hose from House of Hose I hope they will work with me maybe they carry the Trident hose!!!
I will call tomarrow.
P.S. Infidel I hope you did'nt have to write out all that Gates stuff It looks like the link I provided works!!
Thanks for the extra effort and another source of hose.

infidel

No way!
On the pdf toolbar right next to the hand icon there is symbol that looks like an 'I' just click it then you can highlight, copy and paste any part of the text that you like.
I buy the Trident in 50' rolls, does two and half trucks from American Hose in Seattle 800-877-8041.
Never asked but assume they also sell cut lengths.