Checking and adjusting start of fuel delivery Fig. 5 Remove screw plug А on governor housing. 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 fitted, take out blocking pin Б . If the pointer is exactly in the centre of the inspection hole, the pump plunger for cylinder 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: 5 a. Light signal transmitter Fig.
6 3 4 Push light signal transmitter into socket in gov- ernor housing. Ensure that the lug В fits in the groove Г . Tighten the knurled nut Д by hand. Fig. 7 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. 5 6 6 Slowly turn the engine further until lamp (B) comes on too. The injection pump is now at start of delivery. A B 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 engine back and repeat the procedure.
The picture shows the light signal transmitter KDEP 1601, which is energised by its own power supply. 7 28 1 2