http://www.youtube.com/watch?v=J3Pb40cgyqw

Upon initial installation the sump should be drained once every couple of days to determine if contaminants are present.  After a few tanks of diesel have been used, weekly sump draining should be fine.

Inspection of the internal fuel screen is another story.  Depending on the condition of the fuel tank as well as how well the tank was cleaned will determine how often the screen should be cleaned.  Trucks in commercial use have been driven 2500 miles without any noticeable power concerns.

TFB Global recommends inspecting the screen every 500 miles for the first 2000 miles in order to establish a maintenance interval for that particular truck.

If the screen becomes restricted between inspections and a power loss in observed, a 10 minute cleaning will have you back on the road, no parts needed!

To access the fuel screen , open the quick drain by pushing uo and rotating CCW.  Un-screw the knurled ring and remove the fuel bowl.

Once the fuel bowl is removed from the head, remove the seal.  There should never be any sealant on the seal.  Clean and dry as needed.

Using a flat blade small screwdriver....

Carefully get behind the fuel screen and lift the screen off the filter head.  A slight resistance may be felt as the screen fits snug over the fuel inlet port.

Once the screen is removed, simply wash in reverse flow any accumulated debris.  Brake Kleen, solvent, clean diesel or even water may be used.  Be careful of any loose screen wires to avoid puncture wounds.  Occasionally loose screen wires may be trimmed with scissors or small wire cutters.  

Once the screen is clean, reinstall over the fuel inlet port.  Be sure the screen is installed in the same orientation as it was removed.  The center bore of the screen will be flared slightly.  The flare and rough screen ends should face the bowl drain.

Next, place the seal over the screen.  A couple dabs of Dow Corning #4 or light grease will aid in holding the seal in place.

Next position the bowl up against the seal and thread the knurled ring onto the filter head.  Tighten the knurled ring only snug enough where the filter bowl will not rotate with light force.

No not over tighten.

Start and run the engine for 2 or 3 minutes.  Shut down the engine and inspect for leaks.