I just purchased a m5700 cab. every time I engage the pto a buzzer goes off for aprox 10 seconds talked to the dealer they didn't know anything about it has anyone had this happen?
My tractors have an alarm that goes off if you leave the seat with the pto engaged. If I don't have enough weight/pressure on the seat it will set it off. It goes off after a short time. Sounds like thats what you may be hearing.