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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: 4104SoFl on August 06, 2013, 05:08:29 AM



Title: 4104 Fuel Line
Post by: 4104SoFl on August 06, 2013, 05:08:29 AM
Looking for info on replacing fuel lines.
Have a leak in the wheel well area.
Ideas / Suggestion

Thanks
Orv


Title: Re: 4104 Fuel Line
Post by: bevans6 on August 06, 2013, 05:52:26 AM
Hard line or flex line leaking?

Brian


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 06, 2013, 05:55:54 AM
It appears to me to be hard line from tank to first fuel filter


Title: Re: 4104 Fuel Line
Post by: bevans6 on August 06, 2013, 06:44:14 AM
You need to identify the exact location and cause of the leak.  If it is a crack in the line, the right way to fix it (and probably hard if not impossible) is to replace the entire line with new.  The other way is to splice it with a section of hard or flex line.  Maybe you could go half-way with a section of new line from the crack back to the engine.

Brian


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 06, 2013, 09:01:11 AM
I'm thinking along the same lines.
Can I use copper tubing?


Title: Re: 4104 Fuel Line
Post by: belfert on August 06, 2013, 11:43:33 AM
If it was me, I would probably use flexible fuel lines.  My bus has all flexible lines, but it is a 1995 model.  Fuel line technology has come a long ways since your bus was built.


Title: Re: 4104 Fuel Line
Post by: bevans6 on August 06, 2013, 12:12:21 PM
The problem with copper is that the commonly available "hardware store" alloys are prone to work hardening and cracking from vibration.  I don't know if the factory lines would have been copper or steel, but I would use steel if I had to put in a new hard line.  Of course I would also tend to use a flexible line if it could be made to work properly.  That line should be under little to no pressure if it is from the tank to the first fuel filter, it should be under suction.

Brian


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 06, 2013, 12:28:16 PM
I agree. I'm going to see about a new line material.
Have pulled the water tank out of the way to get to the lines.
It is leaking right where it goes thru the wall just before the tires
There are several lines in this area both copper and steel
Looks like just the two fuel lines are steel (Main & Return)
Looks like the correct way to fix it would have been to pull up a floor panel.
That's not going to happen


Title: Re: 4104 Fuel Line
Post by: Len Silva on August 06, 2013, 12:46:02 PM
I would replace it with plastic.  Nylon DOT air brake tubing will work well.


Title: Re: 4104 Fuel Line
Post by: Utahclaimjumper on August 06, 2013, 01:10:28 PM
 Many years ago I replaced mine with pre made up steel brake line by replacing a section at a time, the end fittings already on the lines makes it an easy job.>>>Dan


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 06, 2013, 03:13:10 PM
Well before I make up my mind, I've got to get the material that's wrap around both the copper and steel lines going thru the bulkhead in front of the tires removed. That is where the leak is. Any ideas what this stuff might be????


Title: Re: 4104 Fuel Line
Post by: bevans6 on August 06, 2013, 04:21:38 PM
Assume it's asbestos based and take appropriate precautions.  Seriously.

Brian


Title: Re: 4104 Fuel Line
Post by: luvrbus on August 06, 2013, 04:32:18 PM
It's just a corrosion barrier made of cloth


Title: Re: 4104 Fuel Line
Post by: Utahclaimjumper on August 06, 2013, 05:08:40 PM
 I agree, I've worked with the stuff a fair number of times and its only canvass.>>>Dan


Title: Re: 4104 Fuel Line
Post by: chessie4905 on August 06, 2013, 05:41:25 PM
  Just cut the line in front of bulkhead and install a coupler with ferrule on the steel line and go from there with braided ss line with appropriate connector to check valve at engine firewall. Probably has a hole from salt spray from years ago.


Title: Re: 4104 Fuel Line
Post by: Utahclaimjumper on August 07, 2013, 06:09:46 AM
 Salt spray has nothing to do with it, typically steel fuel lines rust from the inside out due to standing moisture in the fuel over the years.>>>Dan


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 07, 2013, 10:31:56 AM
Thanks for all the input.
I have been going over everything that has been entered since 2006
As I thought this appears not to be a common problem, but a problem never the less.
I started working from page 1133 back.
There are several thing I've come across.
Needless to say simply a vat full of info
Down to page 999 now. Looking at those things related to 4104's 4106's and what ever else happens to strike my fancy.


Title: Re: 4104 Fuel Line
Post by: OneLapper on August 07, 2013, 04:54:30 PM
I'll save you some time......

http://www.busconversions.com/bbs/index.php?topic=10906.0 (http://www.busconversions.com/bbs/index.php?topic=10906.0)

And......
http://www.busconversions.com/bbs/index.php?topic=11011.0 (http://www.busconversions.com/bbs/index.php?topic=11011.0)

Now you have time to enjoy a beer



Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 07, 2013, 05:27:01 PM
Thank you kind sir


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 07, 2013, 05:41:07 PM
If I'm lucky I should be able to cure this problem this weekend.
Thanks again for all the input.


Title: Re: 4104 Fuel Line
Post by: chessie4905 on August 08, 2013, 08:22:36 AM
  When you remove the bad section, could you try to determine why it failed?


Title: Re: 4104 Fuel Line
Post by: 4104SoFl on August 08, 2013, 08:57:57 AM
I will give it my best shot
maybe a picture or two also