I have a JD 4100 with a 410 loader I purchased used. If I have the loader up with a load in the bucket, and I want to raise it some more, as soon as I move the joystick, the bucket drops until I have moved the stick enough to get the pressure back so it will rise again. It seems there should be a valve of some sort that maintains the pressure. I've never used a loader on any other tractor that does this.
What seems to be the issue and how do I repair it? Thanks in advance for your advice!