My Z about a week old.
I recently purchased a complete set of used gauges. My gauges, actually my oil & temp gauge was fluctuating after I thought I had solved the problem. So I removed my 46 year old gauge and installed a 46 year old gauge. Much to my surprise upon trying the oil & temp gauge, it worked perfectly. Then I tried hooking up the clock. It didn’t work. Because I have a functioning clock that I built I had nothing to loose and opened it up. I hooked a 9 volt battery to it and watched as the motor tried to wind the spring but it seemed weak. I tried it on 12v from the car. It acted the same. I removed the motor (simple to do) then carefully wound the gear the motor was supposed to wind. It started ticking, a good sign. Decided to spray the clock gears with 3n1 penetrating spray to get gunk off of the gears. Tried the motor again with the same results. Decided to take the brush assembly out of the motor. I didn’t see anything wacky but wondered if the motor was just tired. When the motor was operating outside of the clock, it ran well. Looking at the brushes and armature I could see there wasn’t noticeable wear. Thinking through how electricity works best, I took the brushes out and bent them closer together. Inserted the brush assembly back together and ran the motor. It seemed stronger. I attached the motor back into place. Using the 9v battery the motor was able to wind the main spring. That’s when the magic happened. Tick tick tick, a working original clock. I would have made a video of the motor repair but I would have had to bleep every other word. If anyone wants to tackle this motor fix I can help you do it bleep free. I am not guaranteeing your clock will work but it might. 1972 clock probably built early 1971.
Phil Smith