That's a common problem with all float detents of every make. Often it is easy to fix.
Look at the loader control valve. The valve spool with the longer end cap is the one that contains the detent mechanism. That end cap has a vent which can let dirt and water in & corrodes the detent ball and spring. The common cure is to take off that end cap and clean things up.
Be careful not to loose the spring and detent ball when you slide the end cap off.
Luck,
rScotty