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How do I replace a Worm Gear in a Stand Mixer?

The worm gear drives the vertical shaft and pinion gear. The worm gear should be replaced if the attachment isn't rotating.

Follow these steps to fix your issue:

  1. Shut off the electricity

    The power cord needs to be unplugged.

  2. Remove the end cover

    Pull off the end cover with the mounting screw.

  3. Remove the trim band

    Attach the ends of the trim band to the 2 screws by removing the trim band.

  4. Remove the pedestal

    The mixer should be put on a cradle. Don't remove the pedestal hinge pin set screw. The hinge pin needs to be pushed out. The mixer pedestal needs to be lifted.

  5. Remove the planetary gear housing

    Use a slot screwdriver and hammer to remove the planetary ring. To remove the pin that holds the planetary gear housing to the vertical center shaft, use a 5/32-inch drift punch and hammer. To remove the planetary gear housing, use 2 slot screwdrivers.

  6. Remove the bottom cover

    The strain relief can be slid out of the slot in the bottom cover to remove the power cord. The planetary gear has 5 screws. The screws are on the cover. There is a lock washer on one of the screws. The mounting screw needs to be removed along with the lock washer. Lift the bottom cover with the help of the drift punch. Lift the center shaft with the drift punch and remove the bottom cover. The bottom cover should be on the work surface. Grease should be transferred from the worm gear to the upper housing.

  7. Remove the worm gear

    The worm gear brackets have 3Phillips screws and washers on them. The worm gear assembly needs to be pulled up and off.

  8. Install the new worm gear

    Line up the mounting holes by positioning the new worm gear assembly on the bottom cover. The mounting screws and washers need to be reinstalled. Grease the worm gear assembly.

  9. Reinstall the bottom cover

    Lift the bottom cover and align the gears with the help of the drift punch. To get the gears back into place, lower the bottom cover and twist the center shaft. Lower the bottom cover into the upper housing once the gears mesh. The planetary gear has screws around it. Remove the cover mounting screws. The lock washer is on the rear mounting screw.

  10. Reinstall the planetary gear housing

    The center shaft has the planetary gear housing on it. Align the mounting pin holes in the housing with the hole in the center shaft using the drift punch. The mounting pin needs to be reinstalled. Use a rubber mallet to gently tap the ring back onto the housing.

  11. Reinstall the pedestal

    Line up the hinge pin holes on the bottom cover of the pedestal. The hinge pin needs to be put back in place. Use the slot screwdriver to tighten the hinge pin set screw. The power cord strain relief has to be reinstalled. If necessary, use a rubber mallet to tap the hinge pin.

  12. Reinstall the trim band

    Attach the trim band to the upper housing with the screws.

  13. Reinstall the end cover

    Line up the screw holes by placing the end cover on the upper housing. The end cover has a mounting screw. If you pinch wires, you will not be able to reinstalling the end cover.

  14. Restore power

    The power cord needs to be re connected.

Time required:

30 minutes.

You would need the following tools:

1 square head driver, drift punch, hammer, phillips screwdriver, putty knife, rubber mallet, shop towel, slot screwdriver, work gloves.

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