4KB25G1XTG5 KitchenAid Mixer - Instructions

Fast

Thank goodness for YouTube. Pretty much followed the process of taking it out. Was easy, but having a video made it a bit simpler.

using Phillips screw driver, remove 5 screws - take off cowl (cover)l. remove 2 screws holding speed control assembly
unplug old speed control assembly (4 plugs) and plug in new speed control unit - reassemble cowl .

I followed the instructional video closely. My old circuit board was labeled and laid out slightly differently than the new one, so in addition to labeling the wires with "color" or "motor" label from the old board, I also made sure to label with more identifiers that were included on both boards such as "P1" or "P2". Once I labeled the wires with all the information, removal of the old board and installation of the new board was straightforward. This isn't the first repair I've made on my KitchenAid but it was by far the simplest.

Removed 2 screws holding the switch unplugged the one at a time.
opened the gear box cover 4 Philip screws, cleaned out the grease
removed the pinion gear, removed pin, removed the planet gear assembly replaced gears in reversed order greased it up put gear cover back on and tested worked great.

Watched utube
video how to repair and ordered part, easy

3d time in 20 years, but the mixer itself is built like they did 20 yrs ago PartSelect had the part in my mail box in *20 hours* from online order!
See https://www.ereplacementparts.com/kitchenaid-4kp26m1xmc4-professional-stand-mixer-parts-c-114958_114959_115101.html for instructions.
BUT - they changed the design so a power switch previously separate from (to the left of) the circuit board is now a microswitch integrated on the board, leaving you with ONE LESS WIRE.
Attached is the fix diagram & directions for the new design.

Remover screws from top. Used snap ring pliers to remove snap ring replaced gear and reassemblied.

removed top housing, removed gear housing cover, removed all gears, cleaned out all grease, obtained gears and new housing cover, fit all gears in housing, filled with grease and put on housing cover.
Reassembled mixer.

The repair was easy, I only had to order new gear assembly parts and to replace the associated worn parts (shaft, pin, and gears).

Removed top cover of mixer which was very easy. Then marked the 4 wires so they could be plugged back to new switch correctly. Removed 2 attaching screws to remove switch and one squeeze connector. Installed new switch after plugging on 4 wires. Snapped squeeze connector in place. Reinstalled top cover.

Remove and replace gear case. Apply food grade grease secure with screws.

1. Removed the decorative band then the upper motor cover.
2. Removed the upper gear case cover. Found one of the two alignment pins broken.
3. Inspected gears.
4. Cleaned out old grease.
5. Repacked with new food grade grease.
6. Reassembled.

Remove covers, open gear box, remove lock ring and gears to deterime which gears were bad. Remove old grease, install new gears and pack with new grease.

replace worm gear