| 1. To uncover the starting arrangement (see rice. Carburetor 1B3 details). |
| 2. Completely to open a butterfly valve. |
| 3. To connect the vacuum gage and the vacuum pump to a pneumatic actuator of the air gate. To create depression of 100 Mbar in a pneumatic actuator. If the pneumatic actuator is tight, depression should not decrease more than by 5 Mbar in a minute and decrease less than to 40 Mbar. |
| 4. To bring depression to 200–300 Mbar. |
| 5. To measure by means of probes a starting gap And between the air gate and a wall of a mouth of the first step of the air gate. For cars with five-step mechanical transmission it has to be (2,3±0,15) mm, and for cars with automatic transmission (2,1±0,15) mm. If necessary to adjust a gap the screw of adjustment of the course of a diaphragm of a pneumatic actuator located in a pneumatic actuator cover end face. |
| 6. To close a cap an atmospheric opening of a pneumatic actuator of the air gate. To create depression of 200 Mbar which should not change within 1 min. if the pneumatic actuator is tight in a pneumatic actuator. |
| 7. To measure by the probe a starting gap And the second step of the air gate which (3,0±0,15) mm have to be. |
| 8. If it is necessary, to adjust a gap the screw in an end face of a rod of a pneumatic actuator of the air gate. |
| 9. Coupling guard. |
| 10. The lower bolts of fastening of a case of coupling to the block of cylinders. |