Clock movements are precisely engineered so that each gear meshes with the next with as little friction as possible. Keeping these gears in alignment while reducing the friction is the key to allowing a clock to run properly. When I repair a clock, I always take the movement completely apart to clean and inspect all of the parts. Typically with clocks, if one part is worn or broken, another is about to fail.
My Repair Method
- Step 1
First I disassemble the movement and inspect for any defects/damage.
- Step 2
I then clean all of the parts in an ultrasonic cleaning machine. This machine uses ultrasound and a cleaning solution to remove any dirt and grime that has collected over the years.
- Step 3
I then use a lathe to polish all of the pivots (the ends of the gear shafts) to a smooth finish. The pivots need to be smooth in order to reduce friction and prevent wear on the movement plates.
- Step 4
I reassemble the movement and check for wear between the pivots and their corresponding bushings (holes) in the movement plates. If the bushing that the pivot rotates in becomes elongated or is too large for the pivot, it must be re-bushed.
- Step 5
When re-bushing, I measure the pivot and then select the appropriate bushing. I use a bushing machine that ensures a tight and true installation of the bushing. A worn clock may require up to 20 new bushings.
- Step 6
The movement is test run for two weeks. It is tested outside of the case for the first week and back in the case for the second week. This ensures that the clock has been tested at least two complete cycles (for an 8-day clock).
Contact me to obtain a free repair quote.
Click on any of the photos to enlarge.