MTU Detroit Diesel 183 Series Technical Publication page 253

Task Description
20080/1 E 98-12
Outer valve seat correction
Raise turning device and release securing screw (7) of
pilot rest (6).
Release locknut (2). Turn rapid adjusting screw (1) so
that cutting tool (3) rests on outer valve seat edge.
Tighten locknut (2).
Note
Carefully position rotating tool on valve seat edge.
Press down pilot rest (6) until it contacts pilot. Tighten
securing screw (7).
Release securing screw (9) and turn knurled wheel (8)
counter-clockwise approx. ½ line of graduation.
Retighten securing screw (9).
Hold crank arms (13/16) with both hands and apply light
pressure to turn turning device in stages around pilots.
Repeat two working steps until required valve seat
width is achieved.
Group 05
Subgroup 4532
Page 7