Fuel tank algae

Just use the one from the primary. It should work.

 

Just get a head like mine in the pic. About $20, mount it anywhere you like, between pump and filter on the block. Mine each have a different threads for filters, that is I can’t swap them around. But in your case, another head, just like the one on the engine, and a bracket should do the trick.

 

As long as The fittings are not smaller and restricting flow it does not matter how many strokes it has. If you are just using as a spotter smaller ports would not matter. Work through the trash and take it off for the road.
Primary filters normally were between the fuel tanks and fuel supply pump on many engines.
They were more or less a bird catcher to protect the supply pump.
The secondary filter was between the supply pump and in injection system, be it an injection pump or electronic injectors. It brings filtration down to what these components require.
I assume you are talking about an NTC that I thank I have seen you post about. The PT pump did it all and only ran one filter in most cases. I thank they ran about a 10 micron filter.
These new engines are running 2 and 4 micron filters. They are running 10 and 12 micron filters as primaries.
You can research on you bases and the filters that fit them. Those old Cat primary screens were probably something like a 100 mesh screen. You even buy 100 mesh spin ons.
That serviceable screen filter I mentioned is something like a small version of a Tee Jet inline strainer. You could even use use one of those and take it off when all is clear.
Even on a Cummins the big advantage of a primary and secondary filter is the primary catches all the big stuff. This extends the life of the secondary. The secondary is not pushed to extremes as often. Injection system should benefit from cleaner fuel and free flow.
Anyway I hope that is explained enough. I believe if you clean the tanks out on the truck and do additives as others have said you with be fine. Cheers!

 

You got Me thinking, maybe I should run my primary on the supply side of the fuel pump. It make bettor sense. I wonder if I would need shutoffs on both sides, or a check valve on the tank side? To keep from losing prime.

 

I need to check the microns on my secondary, It a Detroit 5207, or Donelson equivalent 556915, I’m guessing it’s higher than 10 microns. Do I need a lower micron filter on secondary, since primary is 10 microns? I just want to keep my new injectors clean.

 

I’ve only got 1 shutoff on supply side of secondary, I shut it off when I change filters. That’s the only kind of shutoff I’ve had on any of my Trucks. The new style shutoff valve on top of my tanks are known for leaking and causing problems with fuel flow.I’ve been told to eliminate it, and plumb a T in its place. I try not to touch it at all.