Open the battery compartment with your fingertips and nails or use a screwdriver to open it.
How to fix a wall clock pendulum.
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.
A pendulum too high causes the clock to run fast.
Dried oil and debris can clog and stop the clock mechanism.
Lengthen the pendulum by turning the screw mechanism to the left 1 2 turn.
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.
Brushing the mechanical works with a soft brush such as a paint brush should dislodge any dust or dirt.
If dried oil is visible gently brush it away.
Step 2 put on gloves and pull the batteries out with tweezers or tongs.
Check your clock with a bubble level and find where it needs to be shimmed.
Locate the adjustable weight or screw mechanism near the pendulum arm.
Too low causes the clock to run slow.
If your pendulum clock has lost its best beat you can get it back in time with a bit of beat education and simple tools.
If no pendulum is attached your mantle clock may be regulated by a balance wheel which is operated by a spring.
Dabbing a few drops of clean oil on the area then restarting the pendulum should get the clock running again.
Bend the clock verge back into position with a set of needle nose pliers instead of shimming your out of beat clock.
Shorten the pendulum by turning the screw mechanism to the right 1 2 turn.
Check to see if the spring is in working order.