What does a general movement overhaul entail?

Below is a abbreviated list of items either checked or repaired in a general overhaul

1.  All wheel pivots are checked for roughness.  There were not pivots that needed polishing.
2.  Inspect all clicks for wear.  All three chain wheels  had good clicks and springs.
3.  Inspect all pivot holes for wear.  Found 11 pivot holes that needed rebuilding.  The original hole was cut out and a new piece of brass was installed.  This new piece of brass was then reamed out to the exact size of the pivot.  Then the hole was polished and hardened for a longer lasting repair.  The outside of the hole both inside and out was beveled for a smooth fit.  After the pivot hole was rebuilt, the wheel was placed between the plates and spun.   The wheel must spin smoothly or else the clock will not operate correctly.  Every wheel hole tested  great.
4.  The escapement wheel was inspected for wear.  In better clocks there is not usually a problem here.  This is what was found with this clock.
5.  Pallets were inspected.  This too was found to be in great condition.
6.  Strike and chime wheel pins were inspected for bentness (if that is a word).  All were in great shape.
7.  Wheel teeth were inspected.  They all looked great. 
8.  Fans on both the  chime and strike trains were inspected.  These fans act as a throttle to regulate the speed of the chime and strike.  If the fan is too loose, the sound plays much too fast.
9.  Complete disassembly and cleaning in an ultrasonic cleaner.


Once the movement is placed on the test stand final adjustments are made.  Here is a short list of the adjustments made on the clock:
1.  Chime cam is adjusted so that the chime plays and stops at the proper time.
2.  Strike cam is adjusted so that when the strike lever falls off the rack, the strike hammers are not in a lifting position.
3.  The chime drum is adjusted so that the melody starts and ends at the proper sequence.   

When all the adjustments are completed.  The movement is oiled with hi-grade clock oil and the hands are attached.  When the hands are attached, it is possible to check the speed of the clock.  If the clock runs too fast, the pendulum is lengthened and if the clock runs too slow, the pendulum is adjusted shorted.  There is a regulation nut at the bottom of the pendulum ball that is used to accomplish this.

Mike's Clock Repair
Centennial, Colorado 80112
www.eclockfixer.com
(720) 333-6309
"For a Good Time, Call Mike"

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