Instructions for Hermle Mechanical Mantel Clock with an hour and half hour strike and a pendulum
note: these clocks usually have Hermle 131 Series Movement
- Take the clock, pendulum, and key carefully out of the carton. Carefully remove the protective packaging such as foam rubber, corrugated paper, rubber bands, etc. You will find these mainly where the hammers, the pendulum leader, gongs or bells are located inside the back of the clock. Please wind your clock fully every seven days for optimum performance (the clock will run about 8 - 9 days on one winding). To wind, the clock uses the enclosed key. Turn key clockwise until it stops. The left winder is for the striking, and the right winder is for the time. Hang the pendulum onto the pendulum leader, as shown in the diagram below. Move the pendulum slightly to the left or right and release it gently. You should hear an even "tic - toc" sound. If the tic-toc is uneven or the clock stops, follow the "putting in beat" instructions that follow next.
- Putting the clock in beat is an adjustment to make the tic and toc evenly spaced. There is a slip clutch mechanism in the clock's escapement (the part that makes the ticking sound and operates the pendulum). The slip clutch is operated by pushing the pendulum leader (see illustration 1) slightly past the point where you feel resistance.
- Putting the clock in beat is the responsibility of the clock owner. While the clock was on rhythm when it left the factory, it may get out of beat due to handling or not being on a level surface.
- To put the clock in beat: Listen to the tic toc. Gently push the pendulum leader slightly past the point of resistance. Listen to the tic toc again. If it is more uneven, push the leader in the opposite direction and listen to the tic tock again. After several tries, you will be able to get the tic and toc sound to be evenly spaced, and the clock is then "in beat."
- If striking is not required, do not wind up the left winding hole.
- Move the minute hand (long hand) clockwise or counterclockwise to set the clock to the correct time. The clock will strike the number of each hour and will strike once on the half-hour.
- If the clock is striking the wrong hour, move the hour hand (short hand) to point to the hour that the clock just struck. To make the clock run slower - turn the regulating nut below the pendulum to the left.To make the clock run faster - turn the regulating nut to the right. One turn of the regulating nut changes the clock's rate by approximately 1 minute per day. It is usual for the clock to be off 2-5 minutes a week.