It is possible to measure the characteristics of the vacuum and centrifugal ignition timing controllers only on special equipment.
Loosen the capacitor screw with a screwdriver.
To check the capacitor, a special device is required, but you can first assess its condition with an ohmmeter. First, we connect the output of the capacitor to its body so that it is discharged. We connect one ohmmeter probe to the body, and the second to the wire tip (it is better to switch the ohmmeter to the upper limit of measurements). For a working capacitor, the arrow should sharply deviate to the side «0», and then smoothly return to the end of the scale, to the symbol «infinity». If you change the polarity, then the arrow should deviate even more towards «zero».
We change the faulty capacitor.
We remove the slider (see Replacing the distributor rotor).
key «on 7» unscrew the nut of the low voltage contact,...
... while holding the screw with a screwdriver.
Shooting pucks...
... take out the screw, remove the insulator and the wire tip from it.
We unscrew the two screws securing the contact group (see Adjustment of the angle of the closed state of the breaker contacts).
We remove the contact group.
We check the condition of the contacts, if necessary, level their surface with a needle file. If the contacts are badly worn (melted down) - change the contact group assembly.
We knock out the cotter pin with a thin beard.
Remove the oil deflector and washer from the shaft.
We take out the roller from the distributor housing.
Prying with a thin screwdriver, remove the lock washer and thrust from the pivot plate pin.
We unscrew the two screws securing the vacuum ignition timing regulator..
...and take it off.
Loosen two screws (the screw on the side of the plastic insert secures «mass») …
... and take out the bearing with the rotary plate.
The bearing during rotation should not seize and have play. We replace the defective bearing.
We assemble the ignition distributor in the reverse order of disassembly.