I changed the title of the thread to reflect the correct tractor and moved it to the correct forum. This will help you to get the info you need!
If you have soemthing heavy on the back, it might fall in a matter of a half day or a week. With nothing on the back, they should not drop.Well, maybe this won't stump the crowd - it is not normal for the rocker arms (raised) to drop when the engine is turned off is it?