The clock mechanism was last replaced in 1848. Over the past two centuries, the clocks have stopped several times: during the Great Patriotic War, in the 1990s, and in 2014 when the tower was left without a keeper. In 2017, an 11th-grade student named Ivan Pershin, who was passionate about clocks, climbed the tower with a friend and started the mechanism. Since then, he has been the tower's keeper, maintaining its mechanism and working as a guide, telling tourists about its history.