Cuckoo Clock Repair How Can I Get The Birds On My Cuckoo Clock To Work And Cuckoo?

How can i get the birds on my cuckoo clock to work and cuckoo? - cuckoo clock repair

My father, my mother bought recently, a cuckoo clock to an antique shop. The clock was in the store But now he is not home. The weight will not move in pendulum and cuckoo birds do not come out and cuckoo. How can we solve this problem? BTW the cuckoo whistles work as well as the bellows not only birds and weight.