440's were a trouble prone rig by design and have several known issues. Also, for what it is worth when you start paying 40 per hour plus parts (that are getting scarce too)you can quickly reach a point where it is cheaper to replace it with a newer used rig. Furthermore that rig is 30 years or more old and is at or near end of life cycle and even if repair now could fail again because of other old parts going belly up too. I understand rig may have some sentimental value but there comes a time when you walk away from it and use it as a book end, a conversation piece or a door stop.