In the other thread that you started on this exact same issue I told you you need to turn the selector valve on the hydraulic block (Slotted screwdriver valve on the side of the block) to get the three point to work with the loader removed.
So go do that then report back on if the three point is working normally with the valve in the bypass position.
If it is the problem lies in the loader valve, either the detent or linkage is hanging it up and not letting it center or the spool is damaged and that is not a repairable issue, you will need to replace the loader valve.
Once you report back, I will put the two thread together to keep the confusion to a minimum!