MTU Detroit Diesel 183 Series Technical Publication page 295

Task Description
Preparatory operations:
Drain fuel from duplex filters
Remove fuel lines (07-5500 and 07-5501).
Removal
Remove tubes on vent valves.
Remove vent valves.
Remove filter elements (see Operating Instructions).
Remove filter head from carrier.
Inspection and repair
Clean all components.
Remove corrosion and/or water stains in filter head with brush.
Using red penetrant dye method, crack-test filter head surfaces; replace components as necessary.
Replace filter elements (see Operating Instructions).
Pressure-test filter with diesel fuel - test pressure 6 bar.
Replace vent valves as necessary.
Inspect vent valve hoses; replace as necessary.
Installation
Install fuel duplex filter on carrier.
Install vent valves (with new hoses if necessary).
Install fuel lines (07-5500).
20080/1 E 98-12
Group 07
Subgroup 5580a
Page 3