Press the generator away from the cylinder block and tighten the generator mounting bolt to the tension bar. The normal belt deflection should be within 10-15 mm when pressing hard with your thumb on the middle of the belt branch.
Adjusting the alternator drive belt tension: 1 - belt tension check point; 2 - clamping bolt for fastening the generator to the tension bar; 3 - nut of the bolt securing the tension bar to the engine
Tighten the generator bracket mounting bolt.