In 1978 I built a grandmother clock for my wife. It has run all those years and within the last year it has stopped chiming the minutes and some of the hours. OK I know it needs oiled, but it is 40 years old. There is little room to work and frustration builds till it bursts. I put it all back together and now it chimes the hours and minutes perfectly, but it won't run. I am so frustrated I just put it back for another day when my nerves settle down. Maybe have a cold one and chill.