What is the procedure for changing the fan clutch on a 2004 f-250 6.0 liter diesel?

remove front fan shroud and upper radiator supports loosen fan which is right hand thread normal. you can remove the four 15mm bolts that hold the back shroud on two top and two bottom and pull the fan and rear shroud out at same time remove the 10mm bolts that hold the fan to the fan clutch and reinstall.