955h fuel filter ?

Bob,
Take the 4 3/8" nuts off top of filter housing and replace the filter,put top back on, bleed filter.
Good luck
Bob

Bob from IL - The primary filter bowl you removed, should have an unscrewable center piece .. which is brass, and which comprises a heap of small brass washer elements, stacked on a square section center bolt .. which screws into the top of the housing that the bowl is attached to.

Uncrew this little brass filter, and wash it, being careful not to lose any of the brass washers, then reinstall it. This little element is your primary filter and catches all the major crud from the tank, and the gaps between the washers plug with that crud. A wash as described above, will bring back full fuel flow ability for the primary filter.

Once you have done this, move on to the secondary filter, the tower alongside the injection pump .. and once you have removed the cap and old filter element .. unscrew the plug at the bottom of the tower , drain the old diesel and crud from it, and thoroughly clean the filter housing with the likes of a rag on a big screwdriver. Flush the filter housing when you have all the crud loosened, re-install the drain plug, and 2/3rds fill the housing with perfectly CLEAN diesel. Install the filter element slowly and carefully, then top up the filter housing with more clean diesel .. then install the cap and tighten the 4 nuts firmly and evenly.

You then unscrew the bleed valve on top of the filter housing, and pump the priming pump until clean, bubble-free diesel is flowing from the bleed screw. Tighten the bleed screw and fire her up, and your fuel pressure gauge should be in the green, and you should have an increase in power. If neither is happening, you need to check the fuel line outlet on the tank, to ensure it isn't plugged with crud as well.

I removed the top of secondary filter and lifted element out. It was coated iwth slime and the was a small amount of water also. Im going to get a new filter tomorrow from napa. Im certain it will solve the problem. Thanks so much for the information.