Turning nut 1 opens the damper, and tightening nut 2 closes the damper.
1. Press all the way down on the accelerator pedal. In this case, the throttle valve of the first chamber should open completely. This can be determined by the position of the throttle control sector, which should move to the extreme position.
2. Release the accelerator pedal, while the throttle valve of the first chamber should be completely closed. The throttle control sector should move all the way in the opposite direction. If this does not happen, adjust the drive.
3. To adjust, loosen one of the adjusting nuts. By tightening another nut, achieve such a position that the throttle valve opens and closes completely. Then tighten the nut that was loose (see note).