Deuce fuel Routing - Steel Soldiers::Military Vehicles Supersite

rosco · 03-16-2010, 08:42

Immediately under the alternator is a filter canister. It has what I call, "an old time cartridge" that is washable. Its fuel. The fuel line comes from the tank, turns right and goes forward up the right side of the frame, to this filter canister. Is this a primary filter?

From here, the line goes forward, crosses under the radiator & goes into the bottom of the injection pump. then it looks like it comes out of the IP and goes over to the double filters on the top of the left rear of the engine, then back to the IP. Are these two filters the secondary filters? The part I can't follow is there is a tee at these two double filters for a line that goes straight down and back along the left frame rail. It looks like what a supply line would look like. I must loose it, because I think somewhere along the frame, the line I follow, turns into an air line. What am I missing? Regards

AceHigh · 03-16-2010, 08:51

Under the alternator is the primary. From there it goes to the two secondaries.

rosco · 03-16-2010, 08:56

From the two secondaries, what is the line that goes to the rear, down along the frame. Is that primary ever up graded to a paper type cartridge?

cessnatwin · 03-16-2010, 09:22

get a hold of jtonka and get a spin on kit! you will be glad you did! He is a great guy and very informative, he knows his stuff, throw that paper filter away, dont waiste your money replacing it with another one!

WillWagner · 03-16-2010, 09:24

The white rock lookin' filter is better than the paper type for the cartridge type filter. You can upgrade to a modern filter head so a spin on can be used.

jasonjc · 03-16-2010, 10:13

Its a retrun line going back to the tank.

rosco · 03-16-2010, 10:16

Thanks for the information about the filters, but I am trying to understand the routing of the lines. Why is there a tee at the secondaries that goes to the rear, if the primary is under the alternator?

Lee in Alaska

rosco · 03-16-2010, 10:19

Thanks jasonjc. Do you know where it crosses back over to the right side?

AceHigh · 03-16-2010, 10:58

It goes from the primary to the booster pump on the IP, then to the secondary and finals, then back to the density compensator and finally the IP head. Past the injectors to the return.

I think.

rosco · 03-16-2010, 11:20

OK, I'm starting to get it. My density compensator has been removed, so it is just tuned to run straight diesel. That is where I am loosing it. I have had the truck for about a year, and haven't had much time with it - only burned a half tank of fuel or so. But I bet the filters were half full of water and the secondary filters were rotten and had mil spec numbers on them. They have been there forever. The only reason she is still running, is a testament. There will be some up grades for her, and a new radiator & engine coolant heater. Like a lot of these trucks, they have been rode hard and put away wet. Most of the maintenance has been some light buffing on the surface.

Lee in Alaska