Execution order
1. Remove the starter cover (see Fig. Carburetor parts 2E2).
2. Pull the air damper control lever down and secure it in this position.
3. Connect a vacuum gauge and a vacuum pump to the air damper pneumatic drive.
4. Create a vacuum of 100 mbar in the pneumatic drive. If the pneumatic drive is hermetically sealed, the vacuum should not drop by more than 5 mbar per minute and decrease to less than 40 mbar.
5. Bring the vacuum in the pneumatic drive to 200–300 mbar.
6. Measure the starting gap A using feeler gauges (see Fig. Carburetor parts 1B3) of the first stage of the air damper, it should be (1.8±0.15) mm. If necessary, adjust the gap by turning the diaphragm stroke adjustment screw, which is located at the end of the pneumatic drive cover (see Fig. Carburetor parts 2E2).
7. Close the atmospheric hole of the pneumatic drive with a plug and create a vacuum of 200 mbar in it, which should not change for 1 minute if the drive is sealed.
8. Measure the starting gap A of the second stage of the air damper with a feeler gauge, which should be (4.0±0.15) mm for a car with a manual transmission and (3.9±0.15) mm for cars with an automatic transmission.
9. If necessary, adjust the gap with the screw at the end of the air damper pneumatic actuator rod.
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