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How to Replace a Sligh Grandfather Clock Movement
Replace Sligh Clock Movement: A Step-by-Step Guide
Sligh Clocks
Sligh grandfather clocks are known for their elegance, craftsmanship, and precision.However, over time, the movement, the heart of the clock, may wear out due to constant use or age and eventually stop working altogether. If your Sligh clock isn’t keeping accurate time or has stopped completely, it might be time to replace the movement. This guide will walk you through the process of replacing the movement in a Sligh grandfather clock, ensuring your timepiece runs smoothly for years to come.
Understanding the Movement in a Sligh Grandfather Clock
Before diving into the replacement process, it’s essential to understand what the movement does in your Sligh clock. The movement controls the hands of the clock and ensures the proper timing of the chimes, pendulum, and overall mechanism. In most Sligh clocks, Hermle, a renowned clock movement manufacturer, often produces the mechanical movement. These movements are built to last, but even the best mechanisms eventually require replacement.
Parts You’ll Need for Replacement
To replace the movement in your Sligh grandfather clock, you will need a few key parts and tools. Having everything ready before starting the process will save you time and ensure a smoother replacement. Here’s what you’ll need:
- Replacement Movement: Ensure you have the correct Hermle movement model compatible with your Sligh clock. You can find this information by looking at the back plate of your current movement.
- Clock Hands: While you may reuse the existing hands, it’s always good to have replacements available in case something damages them during the process.
- Pendulum: Again, you can reuse the pendulum, but if it’s damaged or out of balance, consider getting a replacement.
- Weights: Verify that the weights are in good condition.
- Screwdriver Set: A small set of screwdrivers, both flathead and Phillips, will be essential for removing and installing the movement.
- Pliers: Pliers help when detaching wires or parts connected to the movement.
- Cleaning Supplies: If you plan to clean your clock while it’s open, consider clock cleaning and oiling kits.
If you need to purchase any of these parts or tools, you can find a variety of replacement movements, clock hands, cleaning kits, and other accessories at Clockworks, Inc.

Step-by-Step Guide to Replacing the Movement
Now that you have all the parts and tools ready, it’s time to begin the replacement process. Follow these steps carefully to ensure your Sligh grandfather clock is back in working order.
Stop the Clock
Before you begin, stop your clock by removing the pendulum. This will prevent any movement in the mechanism and allow you to safely work on the clock without causing damage to its internal components.
Remove the Weights and Pendulum
Carefully detach the weights by lifting them off the chains or cables. Set them aside in a safe place to avoid any damage. Next, remove the pendulum by gently lifting it from its hook. Be cautious during this step to avoid bending or damaging the pendulum rod.
Detach the Clock Hands
Using a small screwdriver, loosen the nut or pin holding the clock hands in place. Carefully remove the hands from the clock face, starting with the minute hand and then the hour hand. Set the hands aside for reinstallation later. If you plan to replace the hands, ensure that you have the correct replacement parts ready.
Remove the Movement
Once you remove the hands, you can access the movement behind the dial. In most Sligh clocks, screws attach the dial to the case. Use a screwdriver to remove these screws and carefully lift the dial away. With the dial removed, you can now see the movement.
Mounting brackets typically hold the movement in place. Use your screwdriver to loosen and remove the screws holding the movement in place. Gently slide the movement out of the clock case. Be mindful of any wires or chains connected to the movement, and detach them as needed.
Install the New Movement
Before installing the new movement, double check that it is the correct model for your Sligh grandfather clock. Compare it with the old movement to ensure all connections and mounting points match.
Slide the new movement into place, aligning it with the mounting brackets. Use the screws to secure the movement to the clock case. Make sure the movement is securely fastened but avoid overtightening, which can damage the brackets or movement.
Reattach the Clock Hands
Now, it’s time to reattach the clock hands. Begin with the hour hand, pushing it gently onto the hour hand shaft. Next, attach the minute hand and secure it with the nut or pin. Ensure you align the hands properly so they do not touch each other or the clock face.
Reinstall the Dial
Carefully position the dial back onto the clock case, aligning it with the movement. Use the screws you previously removed to secure the dial in place. Take care not to overtighten the screws, as this can crack or damage the dial.
Reattach the Weights and Pendulum
Reattach the weights by hooking them back onto the chains or cables, making sure each weight is positioned correctly for time, chime, and strike functions. Finally, reattach the pendulum by hooking it onto the pendulum leader attached to the new movement.
Test the Clock
Once the weights and pendulum are in place, start the clock by gently swinging the pendulum. Listen for the ticking sound, which indicates the movement is functioning. Check the hands to ensure they move correctly and keep accurate time.
Allow the clock to run for at least 24 hours to ensure everything is working smoothly. If the clock isn’t keeping time correctly, you may need to make minor adjustments to the hands or pendulum.

Final Thoughts
Replacing the movement in a Sligh grandfather clock may seem like a daunting task, but with the right tools, parts, and careful attention to detail, you can do it successfully. Following this guide will ensure your clock functions properly for years to come. If you’re unsure about any step or would prefer professional assistance, Clockworks, Inc. offers clock cleaning, oiling, and repair services to help keep your clock in perfect working order.
For more information on clock parts, tools, or repair services, visit clockworks.com or contact us at [email protected].
