The drill press in question is the Powermatic 1170. The problem is that the quill does not return to the fully retracted position. After full extention it slowly retracts about half way and then stops. If i lift up on the handle it will retract fully. It seems as though the spring does not have enough tension. Can I merely unbolt it and wind it up more or is that asking for problems? I've attached a pic of the spring assembly.