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Board fails, causing motor runs at high speed only
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.
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.
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 .
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.
motor would surge after a few moments of running then die.
so easy to remove the switch. I first marked the wires, 1-2-3-4 and then removed them from the old switch. removed the old switch and replaced with the new one and plugged in the wires as per markings. tried it out before replacing the top and it works perfectly. no longer timid about effecting repairs on my own. the diagrams on the website were a great help. this is a great company to do business with. part was here in 3 days.
Unplugged wires from old switch, plugged them into the new switch. The new Switch have the mounting brackets in different places from the old one. Be sure to match up the numbers by the posts with the correct wires
Unscrew the top and remove it , 4 more screws to remove the top of gear box , wipe out the old grease , lift the gears , but to remove the center gear you need a special narrow tip plier to remove the snap ring . Changed the center gear , apply new food grade grease and with reverse order putting back all remaining parts . Worked fine .