Open the back door of the clock carefully with a small screwdriver.
How to fix a wall clock pendulum.
Too low causes the clock to run slow.
Check to see if the spring is in working order.
Bend the clock verge back into position with a set of needle nose pliers instead of shimming your out of beat clock.
Wind the spring as far as it will go.
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.
Shorten the pendulum by turning the screw mechanism to the right 1 2 turn.
The verge is the wire from which the pendulum hangs.
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.
Check your clock with a bubble level and find where it needs to be shimmed.
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.
Open the battery compartment with your fingertips and nails or use a screwdriver to open it.
Dabbing a few drops of clean oil on the area then restarting the pendulum should get the clock running again.
A pendulum too high causes the clock to run fast.
Dried oil and debris can clog and stop the clock mechanism.
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.