Order of execution
1. Remove starter cover (see fig. Details of the carburetor 1B3).
2. Fully open throttle.
3. Connect a vacuum gauge and vacuum pump to the air damper actuator. Create a vacuum of 100 mbar in the pneumatic actuator. If the pneumatic actuator is sealed, the vacuum must not decrease by more than 5 mbar per minute and decrease to less than 40 mbar.
4. Bring the vacuum to 200–300 mbar.
5. Use a feeler gauge to measure the starting gap A between the air damper and the neck wall of the first stage of the air damper. For vehicles with a five-speed manual transmission, it must be (2,3±0,15) mm, and for vehicles with automatic transmission (2,1±0,15) mm. If necessary, adjust the gap with the pneumatic actuator diaphragm stroke adjustment screw located at the end of the pneumatic actuator cover.
6. Close the atmospheric opening of the pneumatic actuator of the air damper with a plug. Create a vacuum of 200 mbar in the pneumatic drive, which should not change within 1 min if the pneumatic drive is tight.
7. Use a feeler gauge to measure the starting gap A of the second stage air damper, which should be (3,0±0,15) mm.
8. If necessary, adjust the clearance with a screw in the end of the air damper rod.
9. Clutch shield.
10. Lower bolts securing the clutch housing to the cylinder block.
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