2. Install the stroboscope and connect the vacuum pump to the corrector.
3. Start the engine and gradually increase the vacuum in the vacuum corrector by directing the stroboscope beam at the installation marks.
4. The ignition advance angle should gradually increase. If the vacuum corrector holds a vacuum, then the ignition advance mechanism plate in the distributor is jammed. If the ignition advance angle does not increase and the vacuum corrector leaks air, replace it.
Replacement
5. Remove the rotor from the axle.
9.6 To remove the vacuum corrector from the distributor, unscrew the two mounting screws (indicated by arrows)...
6. Unscrew the vacuum corrector fastening nuts (9.6).
9.7...then tilt it, remove it from the pin on the breaker and remove it from the distributor
7. Disconnect the connecting link from the pin on the breaker and remove the vacuum corrector (9.7).
8. Installation is carried out in the reverse order of removal.