Pendulum stops swinging

Question

I just inheirited a Herschede grandmother clock model #325 with moon dial and the windsor chime (rod not tubular) made in Mississippi in the early 1970s. With the pendulum on, the clock keeps a regular beat but slows to a stop within an hour. Without the pendulum, the clock keeps a regular beat, though very fast, and continues without slowing or stopping. Music and strike chimes work perfectly. The weights are properly hung, the chains straight and links properly fitting on the gear and the clock is properly leveled. I would appreciate any help on tests to troubleshoot the issue or how to fix or who to call in the Cincinnati area?

Answer

try this:-The pendulum assembly begins at the top with a 1" two legged suspension spring pinned to a brass post sticking out of the back of the rear movement plate.

  Next a silver(probably) suspension leader about 5" long that hooks onto the bottom of the suspension spring and passes through the "foot" shaped forked brass piece (and must be in the center of the fork slot and not be rubbing front or back) that connects into the inside of the movement. Newer movements have a horizontal bar that fits in the brass suspension leader slot.
  Lastly the top of the pendulum hooks onto the bottom of this suspension leader. NOW if all is correctly assembled, swinging the pendulum will get it ticking. The sound of the ticking must sound even or balanced on either side. Not over-swinging one side or the other. 
  If it is not sounding even, then push with your hand the top third of the pendulum over to the side that has the excessive overswing. You may feel some resistance but gently push a bit more then try the sound of the ticking after swinging the pendulum freely. 
  If the sound is not improved in the balance then do more pushing -if it is now sounding like excessive swing in the opposite direction then push the pendulum to the other side till it sounds a pretty even tick. Clock should run then. .(There is a little slip clutch that you are adjusting when you push the "L" shaped foot to either side.)
  There are a hundred things that could be wrong- you have just taken a tour through the repair of what is wrong 98% of the time!

if not try:

 Ken-Hav Clock Svc (513) 561-8453 

6825 Main St, Cincinnati, OH

BETTER STILL: try Bradley Clock Service 3933 Thimbleglen Dr. Cincinnati, Ohio 45251

(513)746-7175 (Cell) (513)741-1337 (Home)

As I indicate in the membership directory, I work by appointment only.