– Read the angle in degrees at the in-
spection hole in the connecting housing,
and compare it with the desired value in
Section 4. To take the reading, remove
the plastic plug: see Fig. 134.
On engines without a connecting
housing, the fixed mark is stamped on
the crankcase.
Note:
On engines built before or in 1980, the
angle in degrees is only stamped on the
engine for the first (timing-end) cylinder;
only two marks are provided for the other
cylinders. The short mark (half diameter
of inspection hole) shows the angle for
the start of delivery, the long mark (full
diameter of inspection hole) shows the
piston top dead centre point.
– If necessary, correct the start of fuel de-
livery as follows:
If the reading is smaller than the
desired value:
= fuel delivery starts too late.
Remove shims.
If the reading is larger than the desired
value:
= fuel delivery starts too soon.
Add more shims.
Note:
Use a dial gauge as follows to determine
the thickness of the shims needed to cor-
rect the value:
– Set the dial gauge to „0“ at the actual
start of fuel delivery, and turn the fly-
wheel to the desired start of fuel
delivery.
The dial gauge will now show the thik-
kness of the shims to be inserted or re-
moved.
– Repeat the measurement procedure;
the fuel drip from the overflow pipe on
the adjusting device must start precisely
when the desired value is reached.
– Carry out the measuring procedure at
all injection pumps.
3
L / M . . 09.96
134
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