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Old 10-13-2013, 16:29   #1 (permalink)
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1975 E150 5.8L - What size flex hose on the fliller neck??

The rubber on my filler neck hose is cracked and leaking fuel every time fill up. I know o'reilly sells hose by the foot, but I don't know what diameter. Help me out?

The van's in great shape other than the leaky filler neck.
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Old 10-13-2013, 17:06   #2 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

Would be easiest to take it off and match it up.


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Old 10-13-2013, 17:33   #3 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

Quote:
Would be easiest to take it off and match it up.
Do you mean take a match to it :-) Don't under any circumstances be tempted to use ordinary rubber as it will create static electricity and most likely subsequent explosion. It's suicidal. Fortunately (or is it unfortunately for some) fuel filler hoses are one of those items that usually last a very, very long time (often outlasting the car) and as they are not often replaced the need for the correct type of hose isn't something that comes up often. Therefore it is a common mistake to think any old rubber hose can be used. Gates, Dayco etc sell special fuel filler hose by model as well as harder to get cut to length filler hose.

It's the same reason you don't fill up plastic containers not designed for fuel with fuel and if for some silly reason you do you never ever shake them. Also the explosion usually happens when the static gets a chance to earth and that's usually when you take off the fuel cap or you poke an earthed filler hose in so you get real close up look and feel of the outcome.


See: http://www.hbdthermoid.com/images/in...troduction.pdf
Quote:
STATIC ELECTRICITY WARNING
Serious bodily injury, death, property damage or other loss, can result from the use of hose in hazardous or explosive atmospheres due to the buildup of static electricity from the movement of conveyed materials through the hose as well as movement or vibration of the hose against the other surfaces.

Hose, as well as the entire system or application, used in such atmospheres must be properly grounded or bonded. For this reason, HBD/Thermoid recommends only hose with static wire be used.

Static electricity, as a source of ignition for flammable vapors, gases and dusts, is a hazard common to a wide variety of industries. A static spark can occur when an electrical charge accumulates on the surfaces of two materials that have been brought together and then separated (between two solids, between a solid and a liquid, or between two immiscible liquids, i.e., incapable of mixing).One surface becomes charged positively and
the other surface becomes charged negatively. If the materials are not bonded or grounded, they will eventually accumulate a sufficient electrical charge capable of producing a static spark that could ignite flammable vapors, gases and dusts. Some common processes capable of producing a static ignition are as follows:
ï The flow of liquids (for example, petroleum or mixtures of petroleum and water as well as any flammable fluids) through hose, pipes or fine filters.
ï The settling of a solid or an immiscible liquid through a liquid (e.g.rust or water through petroleum).
ï The ejection of particles or droplets from a nozzle (e.g. water washing operations or the initial stages of filling a tank with oil).
ï The vigorous rubbing together and subsequent separation of certain synthetic polymers (e.g.the sliding of a polypropylene rope through PVC gloved hands).
Preventing and/or dissipating static electricity as an ignition source can be accomplished through bonding, grounding or possibly selecting a different non-static conducting material. Bonding is the process of connecting two or more conductive objects together by means of a conductor. Grounding, or earthing, is the process of connecting one or more conductive objects to the ground.**
Certain Thermoid hose incorporates a static wire, which if properly coupled can be used to ground the hose assembly. Other parts of the application or equipment may have to be grounded as well. Hosethat does not contain a ground wire will nevertheless have to begrounded if used in an explosive or hazardous atmosphere. In allapplications, it is the user ís responsibility to ensure the hoseassembly and equipment it is used on, is properly grounded to earth.
**Excerpts from Process Safety Handling Hazardous Chemicals, 1/97:Standards &
Guidelines ñ Occupational Safety and Health Administration.
http://www.unece.org/fileadmin/DAM/t...-84-inf02e.pdf



Quote:
Lately the most prominent example has been the release of a new minicar in England. 500 new models had already been delivered when the manufacturer stopped the production on 3rd September 2001 after two fires had occurred during the first refuelling of the new model in England. According to the German newspaper "Handelsblatt" [3], it was found that the conductive but insulated fuel hose inside the car got so highly charged by the flowing fuel that sparkover took place. As this sparkover happened in the area of explosive fuel vapours an ignition of these vapours could result. For this reason the cars were called back and an earth cable between fuel hose and car body was installed. This modification solved the problem. The ignition hazard arose because the minicar had been tested in countries with gas recovery systems only. England is, however, a country without gas recovery system. As a consequence, more fuel vapours were set free during refuelling creating an explosive atmosphere in the sparkover region.


snip-----------------------------[

3.3.4 Fuel pipes and hoses
When fuel flows in a pipe or hose, charge separation occurs between the fuel and the internal surface of the pipe producing electrostatic charges of opposite polarity on the liquid and the inner pipe wall. The extent to which the charges are retained depend on the liquid, the pipe material and the flow velocity. Highly charged insulated pipe surfaces could even lead to electric breakthrough and puncture of the pipe wall. Such a wall puncture will lead to fuel leakage which is hazardous and harmful to the environment. Low breakthrough voltages are acceptable only in the case of very short pipes in combination with flow velocities lower than
1 m/s.
The explosive BMW Mini Recall notice is here: http://www.problemauto.com/IMG/pdf/R...01_Jul-Dec.pdf

There was also a Virginian trucking litigation case: http://www.virginia-trucking-litigat...rkplace-safety

Quote:
435,000 Settlement- Wrong fuel hose leaves trucker with severe burns

Fairfax, Va.; truck driver burned when fuel vapor ignited while he refueled his truck. The hose sold to driver's employer was nonconductive, allowing a dangerous build up of static electricity. The defective hose sparked a fireball when it discharged

And any ethanol base fuel will also dissolve plain rubber away over time. Most fuel filler hose has a high carbon content in the rubber to provide grounding as well as spiral winding to prevent hose collapse and an additional earth path.

Quote:
Certain materials commonly used with gasoline may be incompatible with high-level ethanol blends, causing them to degrade and contaminate the fuel. Metals that have been shown to degrade over time in the presence of high-level alcohol blends include brass, lead, zinc and lead-based solder. Degradable nonmetallic materials include natural rubber, polyurethane, cork gasket material, leather, polyvinyl chloride polyamides, and certain thermoplastic or thermoset polymers.

Black iron, bronze, and unplated, nickel-plated and stainless steels have shown resistance to ethanol corrosion. Nonmetallic materials like reinforced fiberglass, Neoprene rubber, polypropylene, nitrile rubber, Viton and Teflon meet acceptable usage standards.
Straight rubber is not impervious to fuel as well it needs the right blend to make it fuel resistant.
Also see for the types of rubber suitable for fuel hose.
Trelleborg AB - Rubber Types http://www.trelleborg.com/en/Career/...l/Rubber-Types



Quote:
Nitrile rubber (NBR) - for use with oil
Nitrile rubber is a copolymer of acrylonitrile and butadiene. It is the most common polymer for products that are in contact with oil and fuel.
Nitrile rubber is used in inner tubes for fuel and oil hoses, for example.

In any event Gates Product Catalog and Dayco Dayco | power transmission and cooling system components make relatively cheap universal fit fuel filler pipes/hoses. Just measure the diameter of the old hose and select the appropriate size and length from the Gates or Dayco catalogue.
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Old 10-13-2013, 17:50   #4 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

See Dayco - Fuel filler hose
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Old 10-13-2013, 17:52   #5 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

and Gates Fuel fill Hose | Gates Unitta
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Old 10-13-2013, 18:57   #6 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

O'Reilly sell 3 foot lengths of Gates fuel filler hose in straight flexible as well as moulded bent with 45 degree and 90 degree bend see List: Fuel Filler Hose - Universal | O'Reilly Auto Parts
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Old 10-14-2013, 18:35   #7 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

Right I was talking about bulk fuel filler hose, not just any rubber hose, but my question is what is the size?

I cant take it off and match it up because I only have one car right now. If I take it off I cant drive. If they dont have the right size... even worse.

Is there no way to find out the correct size without removing the old one?


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Old 10-15-2013, 22:43   #8 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

Vernier calipers; get under measure the outside diameter or email Gates.
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Old 10-15-2013, 22:56   #9 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

http://www.gates.com/contact/prod_ap...ion=automotive
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Old 10-16-2013, 00:28   #10 (permalink)
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Re: 1975 E150 5.8L - What size flex hose on the fliller neck??

Its 2"

Rear Main Rubber Fuel Tank Filler Hose Ford Econoline E1TZ9047B | Filler Neck Supply Co.

http://www.fillernecksupply.com/serv...NE-1975/Detail
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