Bucket won't stay up after cylinder repair

[bturner425]

I have a DuAl 105 front end loader on my Ford tractor. I removed the cylinders to have them rebuilt. After reinstallation, the bucket end won't stay up. When I put a load in it it just dumps it out. I have filled the reservoir with hydraulic oil and I also ran all the cylinders on the tractor from full extend to full retract to get any air out. The arms of the loader work fine. They stay where I put them without falling. Any ideas on why the bucket will not stay in one position? Do I need to bleed the operating valve or something? It's like the fluid is just going through the valve without control.

(Not sure if I have used all the right terminology here, so I hope you understand what I am getting at.

 

[kneedeep]

It may take a while to get all the air out of the lines and cylinders.