Disconnect the wires and vacuum hose from the spark timing sensor. Unscrew the mounting nuts and remove the sensor.
The spark timing sensor shaft is connected to the camshaft tailstock in only one position. Therefore, before installation, turn the spark timing sensor shaft to a position where the shaft coupling cams are opposite the camshaft grooves.
Place a sealing ring lubricated with engine oil on the spark timing sensor flange, install the spark timing sensor on the auxiliary unit housing in such a position that the middle division on the spark timing sensor flange is opposite the mounting protrusion on the auxiliary unit housing (see figure 41), and secure the sensor with nuts. Connect the wires and vacuum hose to the spark timing sensor, then check and, if necessary, adjust the ignition timing.
To replace any parts, disassembly is carried out in the following order.
Remove the cover 10 (figure 157), disconnect the vacuum regulator rod 3 from the sensor support plate 6, unscrew the fastening screws and remove the vacuum regulator. Unscrew the fastening screws and remove the support plate 6 together with the sensor 5 and the holder 8. Remove the spring from the coupling 1, remove the pin and remove the coupling and adjusting washers from the shaft. Remove the shaft with the centrifugal regulator 4 and washers from the housing 2.
Figure 157. Spark plug sensor parts: 1 — coupling; 2 — body; 3 - vacuum regulator; 4 - centrifugal regulator; 5 - contactless sensor; 6 - sensor support plate with bearing; 7 — bearing retainer plate; 8 — front roller bearing holder; 9 — front roller bearing holder assembled with sensor support plate; 10 — lid; 11 - lock washer; 12 - driven plate of centrifugal regulator with screen; 13 — shaft with leading plate of centrifugal regulator; 14 - weight; 15 — oil seal.
Assembly is performed in the reverse order of disassembly. When assembling, it is necessary to select adjusting washers to ensure the axial free play of the shaft of no more than 0.35 mm.
Ignition switch
To remove the ignition switch, disconnect the wire from the negative terminal of the battery, remove the steering gear shaft cover and disconnect the ignition switch wiring harness from the instrument panel wiring harness.
Insert the key into the ignition switch and turn it to position 0, unscrew the bolts securing the switch bracket, remove it, and then the ignition switch.
The ignition switch is installed in the reverse order of removal.
For disassembling the ignition switch KZ813 (hungarian production) disconnect the wires from the plug, turn the key to position 0 (off) and unscrew the lock mounting screw. Then, having sunk the locking pin, remove the lock with the contact part from the housing (there is a hole on the lock body into which the lock's locking pin fits). Unscrew the two mounting screws, disconnect the contact part of the switch from the lock and remove the lining from the contact part. Assemble the ignition switch in the reverse order of disassembly.
The ignition switch 2108-3704005-40 differs in design from the KZ813. To disassemble it, simply unscrew one screw, after which the lining and contact part are disconnected from the switch housing.