OK, I've about got myself talked into tackling the fuel lines...just have to do it when it is cool in the mornings..lol..Will be dropping the tanks in order to do it right and need to know where everyone got the correct parts for the fuel filler line and fuel filler pipe to tank hoses. One of the hoses from the fuel filler pipe is a tee and the rear/main tank has an elbow that attaches. Mine is the older style with the elbow being 2 different sizes on the ends. Some said earlier you have to cut a piece of hose to place on the tank and then put the elbow over that in order to get it to fit as that elbow only comes in the same size on each end now. What size are the tees and elbows? PO used some hose on the rear tank that had wire in it and tried to bend for the curve but I think it is collapsed due to the small space. Anyone found these parts locally? When dropping the tanks to replace all the hoses I suspect you unbolt the tank at the front (while supported by straps or a jack) then loosen rear and lower at an angle in order to get to the hoses or do you have to completely remove the tanks? Also any part number for the tank selector on the frame in case I need to replace it? Also if I replace the fuel line on top of the tanks with steel what size tubing did others use and did you just connect it to the tank fittings and fuel tank selector using a small piece of rubber fuel line with clamps? Is the fuel line 3/8 from the tanks to the fuel selector and then 3/8 from there to the metal line at the front and then from metal line to engine fuel pump? What about the fuel line to the generator, looks like 1/4 in the generator compartment, does that come off the rear tank 1/4 or 3/8 to the connector in the generator compartment and then 1/4 to the generator fuel pump (these sizes are all inside hose sizes)? Thanks for all your help and I'm only requesting this info so I can get it all in one place as I've read so much and have had replies from some of you guys but now the clock is ticking and I'm about done working on wiring issues..lol... Glenn

Glenn,
I just did a complete RCPRR (remove, clean, pain, replace & reinstall) on my fuel tanks and lines this past fall. I used 3/8" & 5/16" vinyl coated brake line and I used only SAE 30 R9 and SAE 30 R14 rated rubber fuel lines (3/0" & 5/15" for fuel and vent and 1/4" for the gen) . These lines have a poly inner liner that is rated for todays junk fuels that we run. There are several good albums on the photo site that show tank lines and fuel tank work. I used brass fittings for the lines and hoses and they are available at most good hardware stores.

The Fuel filler hoses, the 4" straight and 90 deg are avail from Jim K, Cinnabar and others, Jim had the best pricing.
http://www.appliedgmc.com/prod.itml/icOid/859
http://www.appliedgmc.com/prod.itml/icOid/567
Check the fuel section on his website for misc parts.

JR Wright
78 Buskirk Stretch
75 Avion
Michigan

On Jul 6, 2014, at 12:54 PM, Steve Southworth wrote:

> As far as I have ever heard these rubber fuel system parts are only available from the GMC vendors.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for working on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
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OK, I've about got myself talked into tackling the fuel lines...just have to do it when it is cool in the mornings..lol..Will be dropping the tanks in order to do it right and need to know where everyone got the correct parts for the fuel filler line and fuel filler pipe to tank hoses. . Glenn

Glenn,

I am not commenting on hoses as you have great answers, already. I would just say that after you drain gas, and drain gas and drain gas... be prepared for about 400 gallons to dump right up your shirt sleeve and run all the way up to your arm pit the second you tip a tank. I am just saying...

It's raining this morning, but cooler. I've been studying the process of RnRing the fuel system but as with everything else you don't know for sure what is what until you start dismantling. Then the surprises pop out. I think the fuel vent lines have long been disconnected from the canister, so will need to look closer at that. I did notice that on the main tank there was a plug or cap put on the hose fitting that comes out of the fuel filler side of the tank about midway, need to see where and what that was for (maybe a return line)? As this is still in the planning stage I can get this all figured out ahead of time..as with any project the hardest part is getting started..lol...Glenn

Hey Steve, like I said you don't know what is what until you get started, that is interesting about that separator, I will have to look at the reserve tank and see if it also has that fuel neck on it. I don't remember seeing one but who knows. I will be glad to get this thing running off its own fuel tank eventually. I'm going to order the parts for the fuel system as soon as I crawl back under there and survey everything again, think I'll take pictures so I can remember what I looked at later..lol...I know I definitely need the elbow for the rear but I could swear I saw a rubber tee at the reserve tank inlet. Thanks, Glenn