MTU Detroit Diesel 183 Series Technical Publication page 235

Task Description
20080/1 E 98-12
Release locknut (2). Insert rotating tool (4) via pilot (5)
coated in oil. Turn screw (1, rapid adjustment) until
cutting tool (3) contacts pilot (5). Then push rotating tool
(4) downwards until cutting tool is in centre of valve seat
insert. Hold rotating tool in this position.
Release securing screw (6) on pilot support (7), press
pilot support (7) downwards until it contacts the pilot.
Retighten securing screw (6).
Clamp cone pin (16) horizontally approx. in centre of pin
with steady rest clamp (17). The rotating tool must turn
as easily as before.
Back off screw (1) of rapid adjuster until cutting tool is in
front of valve seat insert (but not resting against it).
Tighten locknut (2). Install horizontal stop screw (8) until
it makes contact with housing and then back off 2 to 3
mm. Tighten clamping screw (9) positioned underneath.
Adjust height of cutting tool so that approx. 1 mm of
material is still under the valve seat insert after
machining.
Group 05
Subgroup 3832
Page 3