Repairing the Number 2 Mantel Clock of Attorney General Sessions, Part Three

Repairing the Number 2 Mantel Clock of Attorney General Sessions, Part Three

Servicing Mainsprings in a Seth Thomas Type 89 Movement Clock

Servicing the mainsprings in a Seth Thomas Type 89 movement clock requires careful attention and adherence to horological best practices. While there may not be specific instructions for the Type 89, a general procedure can be followed.

Disassembly and Preparation

1. Carefully remove the clock movement from the case, taking detailed photographs or notes during disassembly to ensure proper reassembly.
2. Release any tension on the mainspring carefully to prevent injury. This can be done by fully unwinding the mainspring with a clock mainspring winder or by controlled letting down of power.

Removing the Mainspring

1. Remove the barrel cover or drum containing the mainspring.
2. Carefully take out the mainspring; it may be coiled tightly under tension and can be dangerous if it slips.
3. Inspect the mainspring for rust, cracks, breaks, or kinks.

Cleaning the Mainspring

1. Clean the mainspring in a clock-safe solvent or degreaser to remove old oil, dirt, and rust.
2. Use a soft brush to gently scrub away residue.
3. Rinse and dry thoroughly before reinstallation.

Lubrication

1. Apply a specialized clock mainspring lubricant lightly along the mainspring to prevent sticking and wear. Never use general-purpose oils as they can gum up or damage the spring over time.

Reassembling

1. Carefully re-coil the mainspring into the barrel using a mainspring winder tool to ensure even tension and avoid kinks.
2. Replace the barrel cover securely.
3. Reinstall the barrel into the movement.

Testing

1. Wind the mainspring partially and check for smooth operation.
2. Reassemble the clock and test for correct timekeeping and power delivery to the gears.

Additional Tips

• Work in a clean, well-lit area with appropriate tools like mainspring winders, screwdrivers, and cleaning supplies designed for clocks.
• Mainsprings can be dangerous if mishandled—consider consulting or hiring a professional clockmaker if you are uncertain.

For precise, movement-specific instructions, clockmaker manuals or guides for Seth Thomas Type 89 movements may be required. These can often be found in horological forums, specialized books, or from professional restorer services.

Since the Seth Thomas Type 89 is an antique clock, original parts can sometimes be sourced from reputable antique clock parts dealers if replacement is needed.

In the next part of the series, we will cover bushing work, re-assembly, and testing.

1. Servicing a vintage Seth Thomas Type 89 clock involves not only servicing the mainsprings but also maintaining the overall lifestyle of the clock, keeping it in harmony with home-and-garden decor and the advancements in technology.
2. A crucial aspect of clock repair for the Seth Thomas Type 89 movement involves purchasing clock movements from reputable antique clock parts dealers, where parts can be acquired for replacement or restoration.
3. As technology advances, innovative clock repair tools and techniques may become available, potentially streamlining the process of servicing clock movements such as the Seth Thomas Type 89, thereby preserving the beauty and function of these vintage clocks.

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