New holland 54a adjustments

I have a new Holland 54a thrower I'm on my 268 baler and was wondering if there was any tips or adjustments anybody with a thrower on here makes before baling. When I'm baling it breaks maybe five or six per wagon load. you hear something squeak and then the Bale gets tossed broken... I have new thrower belts but the two belts that drive it are old although they seem in decent shape. I'm just looking to see if there's anything that you can do before heading out to the field.

New holland 54a adjustments