Order of execution
1. Remove starter cover (see fig. Details of the carburetor 2E2).
2. Pull the choke control lever down and secure in this position.
3. Connect a vacuum gauge and a vacuum pump to the air damper actuator.
4. Create a vacuum of 100 mbar in the pneumatic actuator. If the actuator is sealed, the vacuum must not fall by more than 5 mbar per minute and decrease to less than 40 mbar.
5. Bring the vacuum in the pneumatic actuator to 200–300 mbar.
6. Measure starting gap A with feeler gauges (see fig. Details of the carburetor 1B3) first stage air damper, it must 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. Details of the carburetor 2E2).
7. Close the atmospheric opening of the pneumatic drive with a plug and create a vacuum of 200 mbar in it, which should not change for 1 min if the drive is tight.
8. Use a feeler gauge to measure the starting gap A of the second stage air damper, which should be (4,0±0,15) mm for vehicles with manual transmission and (3,9±0,15) mm for vehicles with automatic transmission.
9. If necessary, adjust the clearance with a screw in the end of the air damper rod.
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