Replacing an Acroprint motor and cam:

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Steps:

• Unplug the clock.
• Set the clock so that the time shows any hour, and the minutes on 12 - straight-up.
• Cut the motor wires about an inch away from the motor
• Remove and discard the ribbon
• Remove the minute hand.  Note that there is a locknut underneath the hand, and a very small, specialized screw for the hand.
• Using a flat blade screwdriver, get under the hour hand right at the center and wiggle it up and off.  It's on a sleeve.
• Remove the 4 face screws and the face.  This exposes the frame.
• Using the allen wrench, remove the cam and put the allen screw aside.
  --  Note:  You will be reusing the allen screw.
• It's okay to force (twist and turn) the cam position, the motor is going away, anyway.
• Remove the 4 large screws on the fork. 
• Wack the back side of the motor frame assembly to release it.
• The large black gear controls the minute alignment.
  --  It is adjustable after you put it back together to center the minutes
       if you need to.
   
• See the allen set screws, it's easy to figure out.
• Remove the motor screws. Sometimes there is one long screw and one short.
   Note that the long screw goes at the bottom.  Some machines have two different screws, some don't. Get it right.
• Replace the motor.  We put a drop of locktite (or nail polish) on the motor mounting screws.
• When replacing the cam, make the cam flush with the end of the motor - closest to you, not the frame.
• Leave just the siightest space between the cam knob (minute impulse knob) and the motor frame.  It should not rub.
                        Nearly.....Done!
• Put the motor and gear assembly back on.  Lower it in place with the black gear centering in the movement.
• Put the big screws back in and make them tight.
• Shorten the motor wires, install wire nuts, or at least wrap them in electrical tape.  
• Replace the cam.  Remember that the nub goes to the inside, facing the frame, not you.
• When replacing the cam, make the cam flush with the end of the motor - closest to you, not the frame.
  Leave just the siightest space between the cam knob (minute impulse knob) and the motor frame.  It should not rub.
• Tighten it to th