First i went to the Kitchen Aid web site and found a video on how to take a part the mixer. Followed the instructions from the video and it was very easy. The grease in the machine was black so i cleaned it out of the transmission and repack it with hi-heat wheel bearing grease that i got from a auto parts store it took about a 1/2 lb. then put the gasket in and back together and put the o-ring on. Have run for awhile and it is ok. Want to say that these are very well built machine.
Simple fix actually. UNPLUG mixer and remove the one screw on top that holds on the back. The Phase control board sits under and behind the paper insulator and "switch" assy. Remove the 4 wires with a pair of needle nose pliers, the one screw holding it to the back of the mixer and install the new one in reverse order.
Damaged gears in both machines. Been setting around for a few years broken. Gears broke way too soon.
Simply removed damaged gears. Very simple to do. Ordered gears. Replaced gears. Both working well ( so far. ) Machines are easy to dismantle. Just be sure to put the screws back in the holes you took them out of when dismantling...no lost screws. On the smaller model, took pictures of the wire positions to be sure they were replaced in the proper order. Larger model had no wires to remove.
I replaced the phase control board because the mixer had only one speed and was surging. I noticed from other posts that it is important to note the setting of the speed plate before you remove it in order to remove the phase control board. Also be careful removing the associated 'slip-on' terminals as it would be easy to damage the speed plate. If I ever do this again I will go ahead and replace the speed plate, probably the cheapest item to replace. The operation was a success and the mixer is back in business. Thanks.
The mixer would not spin so I assumed it was a bad worm gear
I watched a video on how to replace the worm gear. When I opened the mixer I noticed a small screw laying in the grease. I removed as much grease as I could and could not find anywhere that the screw would have come from. All the gears turned and looked fine so I replaced the grease put the mixer back together and it worked fine. I am thinking the small screw must have somehow fallen into the mixer when manufactured. So proud of my 70 year old self for getting the job done.
Plastic worm gear gave way (as designed) when the grain mill over-worked it.
I did exactly what the PartSelect video demonstrated after watching other DIY videos on the Internet, thus I did not remove the stand which seemed like a little too much for a simple straight forward repair. This is the second time I have replaced this gear. The first time was about 10 years ago when the bakelite gear broke on a 30 year old KitchenAid K -45. That mixer made hundreds of loaves of bread after grinding many pounds of wheat berries. The only reason we had to replace it was that it walked off the flour dusted counter and landed on its head when my wife had her back turned. Otherwise we would still be using it. :-) Thanks for the excellent service and instructions.
Found control backplate out of adjustment. Should be nominal 3/8".Broken speed control spring which attaches to backplate bottom. I recommend Loctite Blue to complement locknut's when adjusting RPM of "Stir" speed
