Ford 5610s 3-point Hydraulic Squealing after replacing o-rings under unload valve

[Lykins Farm]

I have a Ford 5610S. Just changed the five O-rings under the unload valve on top of the Hydraulic Lift Cover. Very easy and simple job. However, when I got things back together and tightened down, there is a squealing sound coming from the rear 3-point hydraulic when lifting. I think there is more than likely air in the system, but I have no idea where to start on bleeding the air out of that is the issue.

It did not make this squealing sound prior to replacing the O-rings under the unload valve. I tried to attach video but it won't allow me. If you want to hear it, message me your email and I'll forward it

 

[Lykins Farm]

https://drive.google.com/file/d/1vHeNtJ0L-GSG9g_l_XCEgnBZOv8rCKAW/view?usp=drive_link

 

[TractorTech]

Video asking for permission. I checked viewer, but nothing happens

 

[Lykins Farm]

Video asking for permission. I checked viewer, but nothing h

I gave permission to a Ted Johnson. If that wasn't you, can you request permission and I can go to email and give the okay. Not sure why it is asking permission.

 

[Lykins Farm]

https://www.tractorforum.com/posts/451568/

for some reason the video on Tractor Forum doesn't ask for permission.

 

[TractorTech]

Is the sound coming from the unload valve?

 

[Lykins Farm]

1000011568.mp4

This video should work guys. Sorry I am not good with uploading videos.