| 1. Remove a cable of management of pressure from the spherical hinge on draft of a butterfly valve. |
| 2. Weaken the screw of fastening of two parts of a connecting level of the lever of a throttle, then move apart a connecting level at the maximum length (see the drawing). |
| 3. Move a cable of management of pressure before emergence of notable resistance forward. |
| 4. In this situation install the end a cable on the spherical hinge of draft of a butterfly valve. If necessary, adjust length of a connecting level so that the end of a cable was combined with the spherical hinge. |