I believe it was Dean Upson that posted these instructions a while back. Saved them for my first change.
Quote from Dean
1. Drain the fuel.
2. Remove top from canister with a 1 1/8" wrench. Don't use the square drive hole, you will crack the top.
3. Remove old filter and discard the old O ring.
4. Wipe out canister with clean lint free rag or towel.
5. Put in new filter.
6. Put oil or diesel fuel on the new O ring and replace top of canister. It will turn a bit hard because of the seal. I just get mine "snug". Do not prime the canister.
7. At this point, make sure the drain is closed.
8. Turn key to "start" but just hit it without starting vehicle.
You will hear the fuel pumping into the cannister for about 22
seconds. I do this a second time, I don't know that it is
necessary.
9. Start truck and let run for a minute or so, check for leaks around cylinder and you are done. Pretty simple.
This is a very simple operation, just be aware that the top turns hard at first and when tightening up because of the o ring and the prime with the start function. Good luck .
Dean