MTU Detroit Diesel 183 Series Technical Publication page 291

Task Description
Preparatory operations:
Drain fuel from duplex filters
Remove fuel lines (07-5500 and 07-5501).
Removal
Remove nuts and securing screws,
Remove fuel duplex filter from carrier.
Remove carrier from engine.
Remove overflow valves.
Remove filter elements (see Operating Instructions).
Inspection and repair
Clean all components.
Remove corrosion and/or water stains in filter housing with brush.
Using red penetrant dye method, crack-test filter housing and filter head surfaces; replace components as
necessary.
Pressure-test filter housing with diesel fuel at 6 bar.
Use emery cloth to polish out slight wear and pitting; replace filter housing if necessary.
Check filter head for warping and wear; replace component as necessary.
Check condition of screws
Replace filter elements (see Operating Instructions).
Replace valves for constant venting as necessary.
Check carrier for flatness and defects; smooth with oilstone as necessary, check thread for ease of movement;
rechase as necessary.
Replace O-rings.
Installation
Install filter elements (see Operating Instructions).
Install carrier with securing screws.
Install fuel duplex filter with screws, spring washers and nuts on carrier.
Install overflow valves.
Install fuel lines (07-5500).
20080/1 E 98-12
Group 07
Subgroup 5580
Page 3