Man D 2866 LE 401, Repair Manual

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Checking and adjusting start of fuel delivery
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Checking start of delivery
Fig. 1
For the purpose of checking the start-of-delivery
setting, an ”OT” (= TDC) mark and a scale (2) from
10 ... 50
_
before TDC are engraved on a disc fitted
in front of the torsional vibration damper. The scale
marks are read against a pointer (1) fitted to the
crankcase.
Fig. 2
To turn the engine over manually during the setting
work, a plate with a central hexagon bolt is located
on the front side of the crankshaft pulley.
Figs. 3 and 4
There is another scale engraved on the flywheel
which can be read through an inspection hole in
the flywheel housing but access may be difficult.
The scale should be used for readjusting the
pointer after the vibration damper has been re-
moved or replaced.
Before the vibration damper with the scale disc is
installed, the engine should be positioned at ”OT”
(= TDC) by means of the scale on the flywheel.
The pointer should then be aligned such that its
measuring edge exactly coincides with the ”OT”
mark on the scale disc.
2590
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2
3390
2591
2452