A Kundo Standard 400 Day Clock That Gave Me Trouble!

May 30, 2014 | By | 9 Replies More

This is an ordinary Kundo standard-sized 400 day clock made in the 1950s. Normally, I go through my standard repair process, and the clock works well.

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This clock didn’t work well after repair. It ran, but the pendulum rotated only about 3 balls (where 4 balls is one full turn), and sometimes it would stop. Normally the pendulum rotates 3.5 – 3.8 balls with the mainspring wound 2 turns.

Each adjustment I made seemed to help, but after an hour, the pendulum motion would decrease.

  • Closed the suspension fork tines: It helped for a while, then the motion decreased;
  • Made the top block fit tighter in the saddle’
  • Bushed the second and third wheel pivot holes (because the pivots were too short for the original holes;
  • Tightened the fork on the suspension spring.

Finally, I tightened the lower block in the pendulum (this clock has a locking pendulum; and the lower block slides up and down in the top of the pendulum). I squeezed the top of the pendulum together to reduce the slot width, and the clock worked perfectly!

The pendulum rotation was as follows:

  • Escape arc (minimum pendulum rotation at which the clock will run: 2 Balls;
  • With mainspring wound 2 turns: 3.9 Balls;
  • Fully wound: 4.2 Balls.

Repair job 6319. Polished 6 pivots, cleaned, installed new .0032 inch suspension spring.


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Category: 400 Day Clock Repair

Last updated: May 30, 2014

Comments (9)

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  1. Bill Stoddard says:

    Rotate the top block – the saddle is friction mounted.

  2. Mary says:

    I replaced the suspension wire and bottom block on 1950 non locking pendulum kundo 400 day anniversary clock ,but the beat is off ,the fork swings further to the right and clock doesn’t run long . How do you adjust the beat,?this one does not have top screw to adjust it

  3. Nicole Baulkaran says:

    I have a kundo clock the pendulum wire that holds the pendulum unattached from the clock and the pendulum, do you have the instructions how to put it back together, I do not think the little Perl like wire does not seem broken? broken…

    Thanks..Waiting for your help.

  4. Nicole Baulkaran says:

    I have a kundo clock the pendulum wire that holds the pendulum unattached from the clock and the pendulum, do you have the instructions how to put it back together, I do not think the little Perl like wire does not seem broken? broken…

    Thanks..Waiting for your help.

  5. Nicole Baulkaran says:

    I have a kundo clock the pendulum wire that holds the pendulum unattached from the clock and the pendulum, do you have the instructions how to put it back together, I do not think the little Perl like wire does not seem broken? broken…

    Thanks..Waiting for your help.

  6. Arash says:

    Hi,
    Do you have suspention spring of this model for sales?
    Arash

  7. Aksel Andersenm 1950 says:

    Do you hawe a 400 days clock from 1950 for sale. Pleace give me your best price.
    Thank you wery much.
    Aksel Andersen
    DK 6000 Kolding

  8. Bill Stoddard says:

    No, 400 day clocks don’t strike or chime (except for a few rare ones).

  9. Connie Nichols Harney says:

    Does this 400 day Kundo clock chime on the hour ?

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