Mine is a La463, but I would assume it is similar. I have never detached the fel. But I do have the manual in front of me.
1. raise the boom until the stands can be rotated down.
2-5 basically state to drop and lock the stands then drop the bucket until the front wheels come slightly off the ground. It states emphatically not to attempt to lift the front wheels with the stand but with the bucket.
shut off the engine.
Now the loader is secure on it's stands
6. remove the mounting pins 2 each per side, one on the boom, one on the end of the hydraulic cylinder that lifts the boom.
7. jiggle around the fel control stick until you have removed any hydraulic pressure.
8. remove and cap all hydraulic lines.
You should be fully detached, just back away from the loader.