3020 Steering-Turns slow to right sometimes

Now remember,it don't always do this, and it's only when it's turning to the right. My question is this: Did I bleed the column long enough? I only saw a small amount of air in the clear tubing when I first turned it to the right while bleeding it. I let it run about 5 minutes and stopped because I didn't see any more air. I've looked at the lines around the steering motor, and don't see any damage, or leaks anywhere in the system. The hydrolics work great, the lift is strong too. I haven't bled it since I changed the oil. Now the steering wheel turns all the way, but the wheels still take a couple of seconds to catch up. (the steering wheel started turning all the way to the right after it had run for the first time after about 15 minutes.) Any advice from someone that has had the same problem would be great. This is the only 3020 around here with the RollaMatic front end. It don't look as if it has ever been snapped off. The steering wheel has never turned on it's on. Thanks in Advance; Barney in South Ga.