How to revive your Arrow Ball Clock or Arrow Domino Clock



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Very important!  Do NOT pull the electric wires off the motor. There is no reason to do so and you will end up breaking the extremely fine copper windings. I've seen this many times and people are ruining perfectly good motors by pulling the wires out.    

CAUTION!!!  These motors were not meant to be taken apart by Consumers. You risk electric shock by improperly handling the motor. If you are comfortable taking things apart, then proceed, otherwise I suggest sending the motor to me for repair.

     The below procedures will show you how to replace the gears in your Ball Clock motor (WG-1420, WG-1420-2, WG-1420-3, WG-5094, WG-1450).   This motor is used in both the original Arrow Handicraft Ball Clocks as well as the Domino Clocks. In most cases the reason your motor is no longer working is because the plastic armature gear and or idler gear have crumbled or decayed from age. Even if the motors were never used these gears need to be refreshed due to their age. Keep in mind there are subtle differences in the motor housing from one clock to another so use this information as a general guide to perform the repair. The procedure is effectively the same for the Domino Clocks but the plastic motor casing has to be cut open in order to get at the Intermatic motor. Additionally my gear kit will repair the WG-1450 found in the Olympia Beer Barrel Motion Sign.

Update: If you are repairing the Sanyko motor from a digital clock with motor WG6B9A, you will have to widen the hole in the idler gear with a 1/16th drill bit.

Motor Repair Procedures

(Click thumbnails for enlarged view)

  1. Determine how the faceplate of the plastic motor housing is held in place. Some versions of the motor housing have 2 Phillips head screws that hold the plate on. Others need to be carefully pried apart. Your motor may also have a mounting screw with a silver metal locking clip. You will need to carefully remove the clip so you can get the Phillips head screw out. Don't worry about breaking the silver clip. It is not needed and was only installed to keep people from opening the motor. (See figure 1).

      Figure 1

  2. Remove the face plate from the motor housing. Take note of how the motor sits inside the casing and also note the orientation of the electrical cord. Be careful not to pull on the wire leads that go into the motor. There is no need to remove the wires (See figure 2).

    Ball Clock Motor Housing with Face Plate Removed
         Figure 2

  3. Carefully lift the motor out of the casing and position it as shown in figure 3. Using a pliers, very carefully bend the 2 pins circled in red as shown in figure 4 and figure 5. From my experience I only needed to bend these 2 pins outward a little bit to lift the metal cover off. You should not need to touch the center pins (circled in blue) to remove the cap. 

    WG-1420 Motor Removed from plastic casing  Needle nose pliers used to bend one of the pins
    Figure 3     Figure 4     Figure 5

  4. Carefully lift the metal cover off the motor as shown in figure 6.

    Intermatic Motor with metal cover removed
      Figure 6

  5. Remove the Armature, Idler and spacer as shown in figure 7. The spacer is no longer required with the replacement gears. Remove the spacer and discard it as shown in figure 8. The new gears will not fit properly if you fail to remove the spacer. Figure 9 shows the motor with all 3 old pieces removed. With the gears now removed, it would be a good opportunity to apply some lubricant to the 2 shafts. I used Dielectric grease on mine. TIP:  The metal shafts in this motor DO NOT turn.  Only the gears turn.  If you plug the motor in with the armature gear removed, the motor will behave as if it is not plugged in and will be totally lifeless.   When the armature gear has gone "bad" the motor will also appear lifeless. 

  6. Old gears and spacer. The spacer is no longer needed and must not be installed with the new gears. Notice after you remove the armature and Idler gear there is a silver spacer. You MUST remove this. You will no longer need it. 
     Figure 7     Figure 8    Figure 9 

  7. Install the new armature gear onto the shaft as shown in Figure 10. Install the new Idler gear as shown in Figure 11. See the cut-out in Figure 12 for correct orientation of the arm on the idler. In order for the motor to run clockwise, the Idler gear must be installed as shown. If you position the motor as shown in figure 12, you should be able to spin the Idler gear clockwise. 

        Important:  If you are repairing an Olympia Beer sign or the Arrow Handicraft Coin clock, the motor spins counterclockwise. See figure 12A for correct orientation of the arm for counterclockwise spinning.

    New Armature Gear installed on motor shaft   Idler Gear installed on motor shaft   This cut-out picture of the Idler gear shows you which way to position the arm Figure 13 - CounterClockwise
      Figure 10    Figure 11            Figure 12     Figure 12A

  8. Now simply replace the metal cover on the motor. It should snap back into place. Use your pliers to push on the 2 pins that were bent in step 3 (See Figure 13).  Place the motor back into the plastic casing (Figure 14).

    Intermatic Motor with cover replaced  Intermatic Motor repositioned in plastic housing
     Figure 13  Figure 14

  9. Close up the plastic casing and replace the screws. If your motor casing was pried open, you will have to glue the faceplate back on. I suggest rubber cement so you can easily open the motor again for future repairs.

  10. You're done!  Your clock will run perfectly for a long time to come!


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