| NEWBIE: Replace Fuel Line from Fuel Tank to Onan [message #341399] |
Sat, 02 March 2019 08:40  |
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Dutch Marc
Messages: 101
Registered: March 2017
Location: Full TIme Nomad
Karma: 1
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O hi there!
Having to replace my fuel line from my Tank to my Onan. My GMC is a 1973 Canyon Land.
I have never worked on my Fuel tanks before so I am asking for some advice/input. I have been reading the GMC - X7425 Main Manual.
The diagrams are good, but the photos are almost black. No luck there..
I have been told that I might be able to put my "small" hand in between and pull the line from the tank without lowering the tank. Not sure if this is going to work or not.
Are there any photo posted on the forums that would show me some tricks to get this done?
Many thanks in advance !
Grtx Dutch Marc
1973 26' Canyon Land (Mello Yello) (TZE063v101302)
Full Time GMC Nomad ('98 NL 2 USA)
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| Re: NEWBIE: Replace Fuel Line from Fuel Tank to Onan [message #341403 is a reply to message #341399] |
Sat, 02 March 2019 10:14  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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The way to get it done is drop the tanks and do it correctly with new barrier hose, if this hasn't been done. If you can reach in and remove the old hose and fit a new piece remember, it goes tonear the bottom of the tank and thus should be secured with a clamp
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: NEWBIE: Replace Fuel Line from Fuel Tank to Onan [message #341404 is a reply to message #341399] |
Sat, 02 March 2019 10:26 |
Melbo
Messages: 144
Registered: August 2018
Location: Albuquerque NM
Karma: 0
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Dutch
I just finished reinstalling my tanks. I added an extension to the onan fuel pick up BUT I think you are correct that a small hand could install a new fuel line on the barbed fitting without dropping the tank. Be sure to get good fuel hose and you may need a long extension with a small socket to tighten up the hose clamp in the small space above the tank don't over tighten it. A mirror may help you see what you are doing but a video scope would make it much easier if you have one.
Good luck getting it done with the tank in place. Dropping the tank is not bad but messing with all the vent and fuel lines is kind of a pain.
HTH
Melbo
Albuquerque NM Bus Conversion 1978 MCI 1973 GMC
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| Re: NEWBIE: Replace Fuel Line from Fuel Tank to Onan [message #341411 is a reply to message #341399] |
Sat, 02 March 2019 12:28 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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For goodness sake. The tanks are not that hard to take down. put the coach up on ramps like these.
http://www.gmcmhphotos.com/photos/my-ramps/p65472-ramps.html
That puts it up high enough to use a floor jack under it. Bolt a 16" X 16" piece of plywood to the floor jack. Drain the tanks, loosen the old fuel lines, unbolt the brackets holding the tanks up and drop the tanks with the floor jack. Roll them out and replace the Ines. IMHO replace them with steel lines. Done right, you will never have to do them again. While you are in there, stick your fuel pumps in the tanks, and go a long way to eliminating vapor lock. Illuminate the fuel selection valve and control the two pumps with the same tank selector switch on the dash. Do these things the first time, and make it the last. JMHO
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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