I just rebuilt the gate cylinders on a 535 baler. When reinstalling them i connected both ends of cylinder to the correct spot and attached the bottom fluid hose and used a bottle and small hose to refill cylinder with hydraulic fluid then attached top hose. when i tried to work the gate the belt tension cylinder worked fine but gate did not move. I double checked to make sure everthing was reinstalled properly and it is but still no movement. Do i need to break a line loose to bleed air out or does it just need worked several times to bleed itself out? Thanks if anyone can point me in the right direction.