Okay i finally got mad today, I been meaning to get around to a leak on the fuel filter housing...from the heater which is sucking air into the fuel system.
I looked high and low on the internet could not find a FAQ on how to do this.
Here goes, This is for the Stanadyne Model 80 fuel filter housing head
1,Remove the electrical connections, and fuel lines on the fuel filter head on the engine.
2,Remove the assembly from the engine and and drain diesel fuel, and remove filter from filter head.
3, Make a clean work space so you can set things up.
4, Ok first order of the day remove the heater, get a pair of pliers and firmly grip the top portion of the heater heat and slowly pull up ward.... it will pull straight out you will see an 'O ring' around the head base. ( note there are 2 styles of heater one that has a solid core and one that has more of and heater element look to it.) lots on scale and debris in here bad blockage.
5, filter change sensor, note in 1990 this was deleted.
ok there's a metal tang around this that helps to hold it in place...use a very small screw drive and gently pry it tang very slowly working in a clock wise fashion until it comes out...the idea is not to score the base bore, you will then see an 'O ring' behind it in the filter base, go ahead and remove it.
6,Water in fuel sensor, perhaps the easiest one, just undo to small bolts on back. remove sensor.
7,Remove the air bleed valve and the water drain valve.
8, Remove the filter head bracket and electrical connector bracket, 4 x 10mm bolts
9, Okay fully stripped down, time for a chem dip bath for a few hours.
10, Pull out and blast it clean with carb cleaner to remove any leftover dirt or grime. Clean out the drain hole, air bleed hole, and inlet, and outlet holes. Use shop air to dry and blast any left over scaling or dirt out.
Pay special attention to the heater hole on top of the fuel filter head lots of scale in here and dirt.
11, Assembly is the reverse of removal, install new 'O-ring' seals the new ones are made out of vitron..
Don't use the old 'O-rings' they will leak...... ultra low sulfur diesel eats away at the older type of O-Ring seal really badly.
As soon as i can figure out how to load the pictures I get them up here.