Alter the belt tension and the arm-spring tension in the event of an uneven core or if no core is forming. The core serves as the nucleus of the bale; without proper core formation, the bale will never take shape.
Re-calibrate the full-bale switch if the actual diameter of the bale does not match the twine-wrap system monitor setting. Alternately, re-adjust the cam on the full-bale switch.
Lower the pressure of the bale-density hydraulic system if your bales are too dense. If the pressure is already low, accelerate the tractor speed and the baler's feed rate. Reverse these directions if the bales are too loose.
Decrease twine tension if twine feed is not initiated. The tension regulator is part of the electric-controlled twine-wrap system. If the problem persists, you may have to open the baler, re-direct the twine and locate any snags.
Examine the moisture content of the hay if the bales are not expelled when they reach desired size. If the percentage is not excessively high for the grass or legume in question, the tailgate may not be functioning adequately. Raise the velocity of hydraulic flow if the tailgate is unusually slow to open.