Changing springs

This grey spring has weakened with time. The one on the left is the new one.

The new spring on the left is tighter, and pushes hard against the jack, allowing for repeated playing. Every time the jack slots underneath the hammer but, the note can be repeated. This speed of return is important for fast piano playing.

With the spring removed, glue is applied to fit the new spring in tightly

A small dob of glue is applied to the groove.

Each key has it’s own spring below the jack, this enables the jack to push back under the hammer but after escapement.

Close up of the bottom half of a Baldwin console action showing the jack, jack spring, and bridal strap. The jack is the key component of escapement.

New spring being placed in a small slot on the flange

New spring has much better tension, and is able to allow the pianist to strike play the key in rapid succession.

Screwing the flange back onto the action

While doing so, the jack must be underneath the hammer butt, in its correct position to avoid any breakages.

Replacing jack springs

Changing springs