Turn the throttle valve of the 1st chamber until the throttle valve of the 2nd chamber begins to open.
Without changing the position of the flaps, measure the opening angle of the throttle valve of the 1st chamber, which should be within 47-53° or 5.4-6.4 mm.
If there is a deviation from the norm, bend the tongue with which the throttle valve stop of the 2nd chamber rests on the throttle valve of the 1st chamber.
Checking the opening of the throttle valve of the 2nd chamber: 1 - opening of the throttle valve of the 1st chamber; 2 - throttle valve of the 1st chamber is turned by 47-53° (5.4-6.4 mm); 3 - start of opening of the throttle valve of the 2nd chamber.
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