Checking and adjusting start of fuel delivery Fig. 5 Remove screw plug А on governor housing. If fitted, take out blocking pin Б . 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: 5 a. Light signal transmitter Fig. 6 Push light signal transmitter into socket in gover- nor housing. Ensure that the lug В fits in the groove Г . Tighten the knurled nut Д by hand. 4 3 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. 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 en- gine back and repeat the procedure. A This figure illustrated the KDEP 1601 light signal- ling device. This functions on its own battery-driven electricity supply. 7 30 1 2