MTU Detroit Diesel 183 Series Technical Publication page 249

Task Description
20080/1 E 98-12
Valve seat surface reconditioning
Insert pilot (5) (11.9 mm dia.) into valve guide until
slotted rod stop contacts valve guide; if necessary,
press down slotted rod with screwdriver. Secure with
mandrel inserted at top and bottom of pilot (arrows).
Valve seat rotating tool
Secure cutting tool (3) with clamping screw to support
Note
Ensure that cutting tool is secured to support with
correct scale setting.
Release locknut to deactivate free support. Mount crank
on arm marked with appropriate scale setting, (see
Tolerance and Wear Limits List 05-4532 or 05-4532a).
Release locking screw (7) of pilot rest (6).
Group
Subgroup
Page
366 589 00 69 00
05
4532
3