5
6
7
Checking and adjusting start of fuel delivery
26
Fig. 5
Remove screw plug À on governor housing.
If fitted, take out blocking pin Á.
Caution:
If the injection pump is blocked the cam-
shaft must on no account be loaded or
turned because parts of the blocking pin
may break off and fall into the governor.
Non-compliance with this may result
in severe damage to the injection
pump.
If the pointer is exactly in the centre of the inspec-
tion hole, the pump plunger for cylinder no. 1 is at
start of delivery. However, it is possible to deter-
mine exactly whether or not the pump is at start of
delivery only by means of the following special
tools:
1. Light signal transmitter
Fig. 6
Push light signal transmitter into socket in gover-
nor housing. Ensure that the lug fits in the groove.
Tighten the knurled nut by hand.
Turn engine by hand so that piston in cylinder no.
1 in the compression stroke comes close to the
start of delivery.
Lamp (A) comes on shortly before start of delivery
is reached.
Fig. 7
Slowly turn the engine further until lamp (B) comes
on too. The injection pump is now at start of
delivery.
Note:
If only lamp (B) comes on during this
test, the engine has been turned past the
start of delivery. In this case turn the en-
gine back and repeat the procedure.
If only lamp (B) comes on during this test, the en-
gine has been turned past the start of delivery. In
this case turn the engine back and repeat the pro-
cedure.
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