GERALD´S CADILLACS


WWW.ELDORADO-SEVILLE.COM

1974 CADILLAC DIGITAL ROTARY DRUM CLOCK REPAIR AND SERVICE

I'm working on my 74 over the winter and just replaced the heater core. Today I took out the clock as it was so easily accessible while the dash was apart.
The clock still works on warm summer days or when the heat is on, but it can get stuck from time to time and does not work on colder days at all.
Its a clear sign that it needs a good cleaning and some fresh oil. My guess is that it was never serviced as the car is a low mileage beauty which was stored for longer periods of time.
While I have successfully brought some regular clocks from 1958 to 1967 back to life in the past , I have never worked on a digital rotating drum clock before, and somehow I can't find any information on the internet about it...
I have already showed it to the clockmaker in my town and asked if he could service it, but he did not even want to touch it...

edge
The removed clock out of my 74.
edge
The 1974 Cadillac clocks were produced by General Time Corp. They were used up to 1978, but 1978 had different connectors on the back.

I contacted the excellent Cadillac La Salle Club forum and got valuable tips on how these clocks can be serviced by oneself.
Unfortunately these tips came a little late as I had already sent out the clock to a professional clock restorer in the USA. A company called "The Clockworks" will do the service for me. I cant wait to get the clock back hopefully by the end of February 2016.

Nevertheless here are the instructions on how the clock could be repaired by user "Aprules2" who was so kind to take pictures and upload them to the CLC forum:
All pictures and description © Aprules2



"OK, I finally got around to getting some pictures for you. The clock is super simple, nothing like what you're used to. I apologize that its dirty I apparently took it apart, cleaned and oiled it and never put it back together and it sat in my tool box all this time.So this is a picture of the front of the clock - this part wont come off.edgeOnce this case is open you'll be able to see this. This is the black cover that protects the clock motor. Just carefully get under that silver ring and work it off so you can remove the cover.edgeNow you'll be looking at this that thin round piece standing in the middle is what I was calling the little record - thats actually the armature of the motor. Try not to get any oil on it but it's not the end of the world if you do. Just drip some on the ends of the shaft it rides on and put a bunch on any gear you see including the one on the end of the shaft the record rides on. If you do get oil on the armature just wipe it carefully with a q tip with rubbing alcohol on it.edgeHeres another shot of the motor that round brown part is what I called the record.edgeMake sure to really oil these gears you want to try and get oil on every tooth you see. This isn't like the old school mechanical clocks that wont run right with too much oil. These seem to run better when oiled.edgeHeres the back side of the clock put a liberal amount of oil between each reel, and you'll notice the real with the seconds on it has a gear built into it try to oil all those teeth too. Sometimes once it's running Ill dribble some on while it rotates.edgeOnce you've done all that plug it in with it still apart. If it doesn't start instantly, give the clock a slight shake or GENTLY roll the record just to get it started, it should start spinning and your clock will now keep time. I usually leave it to run all night, and if it stops in the middle of the night I add some oil and restart it. Im pretty sure it's the same issue as most old mechanical clocks and watches the oil dries up and becomes sticky and because the motor has very little torque it cant keep the clock running. But adding the slot car oil loosens it up, its just got to migrate through all the friction points. So it's not uncommon to have it stop 2 or 3 times, before it starts running reliably, which is why I like to bench test them. "


Thank you Aprules2 for this great description - whenever I need to service another clock like this in the future I will definitely do it myself.

blog comments powered by Disqus