In the system the relief dumps the fluid from the from the tilt circuit back to the lift circuit so the the cylinders either extend or retract accordingly. With out the relief in the system, everything locks up. The linkages and cylinders continue be pushed as the lift cylinders continue to move. Something has to give at some point. When something gives... it's scary. I have seen one practically explode due to a malfunctioning relief.
Do you really know what you are talking about, the operation of the leveling
system has been explained, operaters who have had some experience with
FELs will avoid the danger areas, the main two being , lifting the bucket
while it is the fully dumped position or lowering it
with the bucket fully retracted. On any loader I have used one or both these
situations were best avoided.