a 6-71 fuel flow question

[Jerry Campbell]

Hi Chris,
I thought I would ask you because you have Detroits.
On my 6-71 the fuel is sucked from the tank thru a 30 micron primary filter (ff5207) thru the pump then pushed thru a 10 micron secondary filter (ff5206) and into the head.
As I understand it now, I,m supposed to move the secondary filter to a point before the pump which would the give me two filters one after the other.
If this is true, could I replace the 2 filters with a larger say Racor 1000 10micron before the pump?
What do you do?
Thanks
Jerry

[cgoodwin]

What I have done is plumb it to draw through a primary filter with good flow and large surface area, into the selector valve, into the pump, out of the pump and through a standard small prefilter, then into the head. This way if the pump ever spits bits the chunks will get stopped before they hit the injectors.

[DeepRoots]

on our generators, we have two gauges, a vacuum and pressure so we know which filter is clogged.
using baldwin filters bf5800 bf5810 on all of our 71 series.

[cgoodwin]

My fuel feeds from the tanks through twin FG1000 Racors, into the fuel pump and through BF5810's into the heads. Remember that there is a restricted orifice in the return line fitting, discard it and you will loose fuel pressure.

I am replumbing to incorporate an electric pump for system priming, when not being used for priming and sitting at the dock it will be used for a fuel polishing system. Having to remove and fill filters on 160F engines in the bilge of a boat at sea is something you only do twice. Once because you have to and the second time to remind you to get off your duff and install a self priming system. Hey does anyone know hoe to get chicken curry chunks out of a bildge pump screen?

[Jerry Campbell]

Thanks DeepRoots, for the tip about the pressure guage on the output of the pump to monitor the filter.

Chris,
It sounds like you are using the Baldwin BF5810 as a secondary and both diesel and WVO pass thru it. How long between changes?
Thanks for shareing
Jerry

[cgoodwin]

No I am not, I was describing how it is factory plumbed. I am putting a stainless filter after the fuel pump just to catch any debris should the pump wet the bed. Never share filters. I will post a drawing later today.

[Jerry Campbell]

Hi Chris,
Hope all is well with you.
Just a reminder that I would like to see your drawing.
Jerry

[cgoodwin]

Here it is, pretty simple really.

[Jerry Campbell]

Thanks Chris,
What is the Stainless Steel Strainer?
Jerry

[Bus Boy]

Hi Chris,

I'm studying your DD671 fuel flow drawing because I hope that we'll be doing something similar with my DD671 powered bus conversion, as we discussed a week or two back.

I have a question regarding the location of the heat exchanger "J". The heat exchanger is for VO, yes? I would have guessed that it would be located between the VO filter "E" and feed valve "G".

I am also about as ignorant as a newbie can be regarding plumbing of VO system components, but am confused and hoped you might clue me in.

Thanks!
Bus Boy