Open the battery compartment with your fingertips and nails or use a screwdriver to open it.
How to fix a wall clock pendulum.
Understanding the mechanics of your cherished time piece will help you fix problems that can occur without having to drag the clock to a repair specialist.
Wind the spring as far as it will go.
The verge is the wire from which the pendulum hangs.
Check to see if the spring is in working order.
If dried oil is visible gently brush it away.
Shorten the pendulum by turning the screw mechanism to the right 1 2 turn.
Brushing the mechanical works with a soft brush such as a paint brush should dislodge any dust or dirt.
Step 2 put on gloves and pull the batteries out with tweezers or tongs.
Lengthen the pendulum by turning the screw mechanism to the left 1 2 turn.
Too low causes the clock to run slow.
Open the back door of the clock carefully with a small screwdriver.
A pendulum too high causes the clock to run fast.
Dried oil and debris can clog and stop the clock mechanism.
If no pendulum is attached your mantle clock may be regulated by a balance wheel which is operated by a spring.
Locate the adjustable weight or screw mechanism near the pendulum arm.
Inspect the battery compartment for corrosion you will likely see a bloom of blue and white or green and white mold around the ends of a battery.
Dabbing a few drops of clean oil on the area then restarting the pendulum should get the clock running again.