Clock Repair

I have a Hermle 451-050H (94CM) movement. The quarter hour…

Customer Question
I have a Hermle 451-050H...
I have a Hermle 451-050H (94CM) movement. The quarter hour chimes will not strike (thus the hour also does not strike). The chain moves on the sproket and I have the heavy weight on the right hand chain. The hammers start but do not seem to have enought "oomph" to finish. Any suggestions. Thank you.... Read full answer
I have a Hermle 451-050H (94CM) movement. The quarter hour chimes will not strike (thus the hour also does not strike). The chain moves on the sproket and I have the heavy weight on the right hand chain. The hammers start but do not seem to have enought "oomph" to finish. Any suggestions. Thank you.
Submitted: 7 years ago.Category: Clock Repair
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Answered in 8 minutes by:
4/17/2012
Clock Repair Expert: Mike, Consultant replied 7 years ago
Mike
Mike, Consultant
Category: Clock Repair
Satisfied Customers: 4,399
Experience: I've been active in clock repair for 14 years - NAWCC member.
Verified

Hi! My name is XXXXX XXXXX it is my pleasure to assist you. Look at the melody chime hammers that strike the rods (usually on the right of the movement)
to see if any of the chime hammers are in a position other than at rest. If you see one or more out further than the others,
the hammers have become jammed. Pulling back on them and releasing might get it started again. Look at the strike hammers (usually on the left of the movement) and check for the same symptoms. As a clock ages the oils and lubricants become gummy and the chimes start slowing down and then finally come to a stop or it may become dry and the same problem may happen. It may need cleaning and oiling as they should about every 5 years.

 

If you would like to try to clean the movement yourself this is how I do in my shop.

 

Recipe for Brass
For clocks that are made of brass, use this recipe: 1 tsp. of salt, 1 cup of white vinegar
and enough flour to create a paste. First, dissolve the salt into the vinegar and then add the flour.
Rub it on as you would with any other type of cleaner, but be gentle with the parts.
Rinse the parts off with water, rubbing them dry and making sure there is no residue or water left.
This recipe will not damage brass, and gloves are not required.

 

Instructions
Things You'll Need
Screwdriver
Compressed air
2 lint-free cloths
Clock cleaning solution
Cotton swabs
Clock oil


1
Remove the back of the clock using a screwdriver, if required.
Inside, you should see numerous gears, springs, and weights.
If your clock is equipped with a pendulum, remove it.

2
Point the compressed air nozzle at the gears and spray bursts of air
into the movements to remove fine dust and particles.
Angle the nozzle in different directions to ensure you hit hard-to-reach areas.

3
Dip your lint-free cloth into clock cleaning solution. Do not over saturate.
Begin carefully wiping all visible gears to remove excess oils and grit. Over time,
oil combined with grit can hinder the movement of the gears. Ensure large, visible particles are removed.

4
Dip a cotton swab into the clock cleaning solution and gently rub areas that you were unable to reach with the cloth.
Be sure to remove any particles left behind with the cotton swab. After cleaning,
rub a clean cotton swab over all visible parts to remove any excess cleaning solution.

5
Check the movement of the gears to ensure they are working smoothly by gently turning the gears with your fingers.

6
Dip a lint-free cloth into clock oil. Do not use WD-40 or any other oil.
Clock oil is specially blended to lubricate clock works without gumming up the parts.
Gently lubricate all moving gears using a lint-free cloth. Dip a cotton swab in clock oil
to access areas that you cannot reach with the cloth.

7
Replace the pendulum if your clock requires one. Replace the backing of the clock using a screwdriver if needed.

 

If you don't feel comfortable doing this yourself If you want I can find a clock repair company in your area just let me know your location and by what major cities and I'll find a few in your area.

 

 

Ask Your Own Clock Repair Question
Customer reply replied 7 years ago
Thank you. XXXXX posted the question I "fooled" a little more with the clock and the quarter hour chimes worked for a day but they were very slow. The hour chimes worked fine when they should have. After a day the quarter hour chimes stopped again. Based on your answer I believe that the movement needs to be cleaned. The movement was installed in 1999 and has never been oiled. It is actually the second movement, as I built the clock in 1979, but never cleaned or oiled the first movement. I have actually built four clocks, but have never done anything with the movements after they have been installed. Any thoughts? Thank you.
Clock Repair Expert: Mike, Consultant replied 7 years ago

Just follow the instructions that I posted in my first answer for cleaning. This will do wonders for your clock and add life and enjoyment to your clock. Upkeep on the clock should be done every 3 to 5 years. Thanks Mike

 

Mike
Mike, Consultant
Category: Clock Repair
Satisfied Customers: 4,399
Experience: I've been active in clock repair for 14 years - NAWCC member.
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