Checking and setting
46
The pointer should then be aligned such
that its measuring edge exactly coincides
with the “OT” mark on the scale disc.
In order to enable the engine to be rotated
manually during adjustments, there is a
plate with a central hexagon driver fitted
to the front of the crankshaft pulley (bar-
ring device).
Checking
Remove screw plug (1) on governor hous-
ing. If fitted, take out blocking pin (2).
If the pointer is exactly in the centre of the
inspection hole, the pump plunger for cyl-
inder no. 1 is at start of delivery. However,
it is possible to determine exactly whether
or not the pump is at start of delivery only
by means of the following special tools:
a. Light signal transmitter
80.99605-6002
21
Push light signal transmitter into socket in
governor housing. Ensure that the lug (3)
fits in the groove (4). Tighten the knurled
nut (5) by hand.
Connect up power supply of light signal
transmitter (red terminal = +). Turn engine
by hand so that piston in cylinder no. 1 in
the compression stroke comes close to
the start of delivery.
4
3
5 6
Lamp (A) comes on shortly before start of
delivery is reached.
Slowly turn the engine further until lamp
(B) comes on too. The injection pump is
now at start of delivery.
When the pump is in this position the de-
gree scale on the flywheel housing must
also indicate the specified start of delivery.
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