1. Loosen the tension of the alternator drive belt (see "Alternator drive belt - condition check and tension adjustment").
2. Having shifted the generator to the engine block, remove the belt from the generator pulley and from the crankshaft pulley.
3. First we put the belt on the crankshaft pulley and then on the generator pulley.
4. Adjust the belt tension (see "Alternator drive belt - condition check and tension adjustment").