Hermle 141-030 Clock Movement
The Hermle 141-030 clock movement is a little unusual as it is 14 day movement. It is spring driven amd it has a single gong on the half hour and the regular gong at the top of the hour. The equivilant Seth Thomas model is A208-012. As you are looking at the movement in the video, it takes a #11 spring barrel on the right and a #10 spring barrel on the left.
How to Oil a Clock Movement
OK you are sitting there and you are trying to remember the last time your clock was oiled. The general rule is that it needs to be oiled every 3 years. To oil your clock just follow these steps:
1. Open the bezel and remove the hands. Most of the time they are held on with a nut but some (old Seth Thomas comes to mind) have a pin that needs to be removed first. Make sure to put them in a sandwich bag now. If you drop it or loose it you will have a hard time trying to find another that matches the thread on your dial (been there done that and it sucks).
2. Now remove the 4 screws inside the case that mounts your movement to the case. At this point you should be holding the movement in your hand.
3. Next grab your oiler and starting with the strike mainspring (S #1) apply a couple drops of oil, go to the next pivot hole in the strike train and do the same. Continue to do this all the way up the strike train. When you have completed the strike train, repeat the process on the time train. Now just flip the movement over and repeat the process on this side.
4. Now we will oil the mainsprings, some people recommend using 30 weight car oil and other people will tell you something different. I will let you sort that one out.
5. I like to oil the cannon pinions and the verge also. The thought process is the easier the gears turn the smoother the clock will run.
6. Reassemble, your clock should be happy now.
You might also like: How to Speed Up or Slow Down Your Clock Using It's Pendulum
How to Easily Clean and/or Fix Your Clock Movement
This is the easiest way to properly clean your clock movement. If your clock has stopped working try this technique and you may save yourself the time and money from taking it to a clock repair shop. One thing I did forget to mention in the video is to put the hands and dial nut in ziploc bag and store them in a secure place. It can be very difficult trying to find another one with the correct thread and size if you loose them.
How To Determine a Clocks Pendulum Length
OK so you bought a clock and its missing the pendulum. If its an American 8 day clock movement just cut your pendulum rod a little long and keep trimming it down until it is keeping accurate time (+\- 3-4 minutes per week is standard). If it is a German clock movement you need to first determine which pendulum leader you need as there are quite a few different styles. Below are some pictures of the different pendulum leaders and the corresponding clock manufacturer.
Hermle Pendulum Leaders
Kieninger Pendulum Leader
Jauch Pendulum Leader
Once you have identified the correct pendulum leader you will need to determine the correct length. The back plate of most German clock movements has a stamp with "XX cm". The "XXcm" is the length from the suspension post to the bottom of the pendulum. So now it is just a matter of adding the length from the suspension post to the bottom of the movement, and then add that number to the length of the pendulum. Take that total and then subtract it from the "XX cm" number that was stamped on the back of the movement. This will tell you how long your pendulum leader needs to be.
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