back prime the fuel system?

Noiseydiesel · Jan 21, 2023

Well, the truck has been sitting far too long while I play with it. I am about to fire it off in another few days after I play with more things, and I am wondering.
Is it possible to remove the shraeder valve from the top of the fuel filter, stuff a rubber hose over that valve and back fill the fuel system?
I figure to use a cheapy TEMPORARY electric pump and prime the fuel system so it hopefully fires off quickly after the glow plugs cycle once.
I figured that would fill the filter, lines and the IP.
I did order a Pegusus pump just now to add in line back by the switching valve. That will be an in~line back up pump to the mechanical pump.

Booyah45828 · Jan 21, 2023

I wouldn't. That schrader is after the filter and would be filtered fuel. I assume you won't be filtering the fuel that your inserting? Pushing fuel into there will only fill the filter and line to the injection pump. It won't do anything for the IP or the injector lines. Cranking it while holding your foot to the floor is all you really need to do. You can pre fill the filter through the outer holes if you'd like, but with a good system it doesn't take much cranking.

Nero · Jan 21, 2023

If you have clean fuel, it'll work. I do something similar to engines at work, where I fill them on the post-filtered side. Just don't make a habit of it.

Noiseydiesel · Jan 21, 2023

I figured to use a 5 gallon bucket of diesel with the hose stuffed about 12 inches down into it. Far off the bottom and away from dirt/water.
My desire was to fill the filter and fuel line from the mechanical lift pump up to the I/P. The filter is 99% filled up, I just don't desire to crank the engine waiting to fill the filter, etc.
It would be nice to see it fire and run with no problem.

Farmer Rock · Jan 21, 2023

Stick a compressed air line(blow gun) in the fuel fill, and stuff a rag around it to pressurize the system. If done right, it works well

Rock

Black dawg · Jan 26, 2023

Farmer Rock said:
Stick a compressed air line(blow gun) in the fuel fill, and stuff a rag around it to pressurize the system. If done right, it works well

Rock

This.....and if you do it with the cold advance solenoid energized, injection pump will be full also.

Noiseydiesel · Jan 26, 2023

Well, the weather guessers are calling for some cold weather for the next week roughly and I am not going to even try to start this toy in less than 35 degrees when ~I~ don't even go outside to play. So it will sit for a week starting tomorrow.

Booyah45828 · Jan 27, 2023

Black dawg said:
This.....and if you do it with the cold advance solenoid energized, injection pump will be full also.

How does it get past the transfer pump?

Black dawg · Jan 27, 2023

Booyah45828 said:
How does it get past the transfer pump?

I always assumed some could get through, But I usually do a few short cranks while the tank is pressured or electric pump running. If I know that there is most likely still fuel in the injection lines I will do all of this with the wire pulled from the fss.

captain720 · Jan 27, 2023

I always get a little confused by the whole priming the fuel system thing, I can change my filter, change my lines, change my manual lift pump, and still fire off in a few cranks with fuel only in the tanks and maybe a little hanging around inside the IP. What’s the need for it? Maybe I have just had good luck.

Farmer Rock · Jan 27, 2023

captain720 said:
I always get a little confused by the whole priming the fuel system thing, I can change my filter, change my lines, change my manual lift pump, and still fire off in a few cranks with fuel only in the tanks and maybe a little hanging around inside the IP. What’s the need for it? Maybe I have just had good luck.

You'll find out soon enough.....lol

Rock

back prime the fuel system?

Noiseydiesel

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Booyah45828

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Nero

HD Diesel nut

Noiseydiesel

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Farmer Rock

just a fella' without a 10mm socket

Black dawg

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Noiseydiesel

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Booyah45828

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Black dawg

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captain720

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Farmer Rock

just a fella' without a 10mm socket

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