I've done a lot of reading on here, but this is my first post.

I'm putting a filter head from an '88 7.3 on my '85 F250 6.9 (and removing the original water separator), and have a few questions:

It looks like a pressure or vacuum switch threaded into a port next to the outlet. What is that, what is it for, etc.? Is that something I can remove and plug the port?

I would guess I should use the fuel heater in the filter head and not the original heater on the inlet tube. Is that correct?

Would filling the filter with fuel before screwing it onto the filter head be a good idea?

Can bleeding the fuel lines at the injectors be a one man job? (I have a push button switch that I can connect to the starter solenoid to crank it over.) As I bleed the lines, I assume that the engine will start running after I've bled a few lines - is that correct?

Thanks for your help - this thing has almost, but not quite, exceeded my ability to learn new things.

 

I recently swapped a 7.3 for my 6.9 but kept my original 6.9 filter assembly.

If its not the schrader valve for bleeding the system, I think its the sensors for the water separator.

Yes fill the filter as full as possible before putting it on, will help keep you from cranking the engine all day to pump fuel into the filter.

While its helps to have 2 people, you can do it yourself.

 

Not sure might just be a fuel filer light never even noticed it on mine, Depending on the temp in your area just use the one on the filter head, Yes fill the filter with your choosen product ATF Diesel Kleen or just Diesel no need to bleed anything if your system is up to snuff.

 

That would be the one on the under side,Oil floats on water.

 

Youre welcome and welcome aboard!

 

Filling it with fuel is good; filling it with Diesel Kleen is better. But you'll need the better part of a 32-oz bottle to do so (around here, about $17).

 

I usually refill mine with, ATF. Its cheap and works great.

 

Beware of that pesky red dye, though, if you're in a state that dips fuel tanks.

 

True but I've never had that issue here in Oregon.

Lol, I would not mind if they dipped my fuel right now, thinned vegetable oil makes a good conversation starter.

 

Check post #7 in this Thread for a Diagram of the 7.3 filter head:

https://www.ford-trucks.com/forums/1...l#post13077038

Mark