backhoe loader bucket won't raise or lower

[CJRemod]

580SK backhoe 4in1 bucket was gradually getting harder to raise and lower and today it finally is stuck in the raised position, can't get it to lower, 4in1 jaws work fine only the raising and lowering function is not working. Before I start tinkering- anyone have this problem before or an idea of the problem?thanks

 

[J_J]

Check your QD's and re seat.