MTU 12 V 4000 M23F Operating Instructions Manual page 174

4. Rotate crankshaft with barring tool in en-
gine direction of rotation until marking "OT-
A1" and pointer are aligned.
Diagram for 12V engines (two
crankshaft positions)
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
Diagram for 16V engines (two
crankshaft positions)
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
174 | Task Description | MS150068/01E 2014-01