Have a 2008 (5103) 3150 I just got. Learning the ropes.
Previous owner had about 500lbs of concrete block on the very back of a disc harrow.
Three Point would not raise.
Took blocks off, and it would raise, but with a good bit of throttle.
Raise rocker arms all the way up and turn off engine, and the arms go back down.
Any ideas on what to look for?