Volvo Penta TD520GE Workshop Manual page 50

Assembly, complete engine
60
At top dead center the piston is still approx. 1°.
To find the top dead center, the procedure below
must be performed.
47. Turn the crankshaft through 350° in the engine ro-
tation direction until 8 mm (0.32") before top dead
centre (dial gauge turning point). Set the protractor
to "0".
48. Turn the crankshaft through 350° in the opposite
engine rotation direction until 8 mm (0.32") before
top dead center (dial gauge turning point). Read
the value.
Example: 50°.
49. Turn the crankshaft until you reach half of the
value you have determined on the protractor.
Example: (0° + 50°)/2 = 25° ACTUAL value.
This is the same as the top dead centre and
should correspond with the top dead center on the
dial gauge.
50. Set the protractor to "0".
NOTE! Leave the protractor on for the next phase, in
order to determine the injection angle.
Group 21