Fuel Filter, Replace (X 20 DTL, X 20 DTH, Y 20 DTH, Y 22 DTR)
Remove, Disconnect
Remove fuel filter housing - see operation "Fuel Filter Housing, Remove and Install (X 20 DTL, X 20 DTH, Y 20 DTH, Y 22 DTR)".
Remove fuel filter housing cover (1).
Remove fuel filter housing (3) - collect fuel.
Remove fuel filter element (2) from fuel filter housing and in place in suitable container.
Drain fuel residue from fuel filter housing in suitable container.
Clean
Clean fuel filter housing cover and inside of fuel filter housing with clean cloth.
Assemble
Insert fuel filter element. Top up fuel filter housing almost to rim with fresh diesel fuel.
Connect components as illustrated - use new gaskets.
1
Central bolt
2
Gasket, central bolt
3
Fuel filter housing cover
4
Fuel filter housing cover gasket
5
Fuel filter element gasket
6
Fuel filter element
7
8
Fuel filter housing
Install fuel filter housing - see operation "Fuel Filter Housing, Remove and Install (X 20 DTL, X 20 DTH, Y 20 DTH, Y 22 DTR)".
Tighten central bolt (1) - tightening torque 6 Nm / 4 lbf. ft.
Remove, Disconnect 
Clean 
Assemble 