4K45SS7OB0 KitchenAid Mixer - Instructions

‘Can’t remember well enough to describe accurately. Removed one screw to remove rear cover. Removed two screws to remove bright-metal band - probably not necessary but it did yield a bit more working space. IIRC, three screws and removing wires from spade-connectors was sufficient to remove the speed control plate. Remove one more screw to remove phase control board (probably unnecessary). I took close-up pictures with my iPhone first to assure wires would get replaced on the proper lugs (only to discover the wiring diagram later). Adjusting the control plate to meet the speed criteria in the instructions was very easy. It did serve to remind me that I probably didn’t need either of the new parts; readjusting the old speed control plate would probably have done it. But I appreciate the POM brought on by the new parts.

It’s an incredible pleasure to work on something so well-made as this old Kitchen-Aid mixer. I just enjoyed handling it! Having achieved a proper repair was rather satisfying too. I just loved the entire experience!

When I took the back cover off I found two parts that "could" be the problem. The speed control plate was cracked which explained the spotty working. I ordered both parts and installed them very easily. The parts fit perfectly and resulted in the mixer working perfectly. I can't say enough about the excellent parts. They were perfect.

Used youtube movies to disassemble the mixer and found that the gear was stripped. I kept the screws in labeled ziploc baggies so I wouldn't forget which screws went where. Once the part arrived, it was very simple to replace the gear. I regreased the mixer and then reassembled. The trickiest part was how greasy everything was! It was also hard to get the pin through the beater hub - I found a video that suggested using a very slim screwdriver to thread the hole before inserting the pin. This was the most involved part replacement I've done on my own, and it was very satisfying to get my mixer back in working order!

We have the classic Hobart-made KitchenAid mixer from the mid-1980s. The original cord sheathing was disintegrating. The replacement cord is actually a better design, but the housing needs to be filed down to slide the cord into place. The old housing channel on my mixer only allowed for something basically the cord width to fit through. The part of the cord that now fits tight against the housing is much thicker and sturdier than the original. I started with a metal file to widen the housing channel, which was working but taking a long time. My son the electrical engineer suggested a Dremel, which was indeed faster on the thick aluminum housing. We used a small circular sanding tip to avoid damaging any adjacent workings. My son also saw that the slim strain relief collar at the top of the cord was pushing and bending the wires too much against the rest of the unit, so he took an X-acto knife and gently rolled the cutting edge along the base of the top collar until he could tear away that extra collar and let the wires lie more naturally in the space. We also managed to break the paper gasket meant to shield the motor from vented flour (in my case lots of years of cocoa powder! Time to vacuum here), but taped that back together with black electrical tape. After the adjustments were made, the cord replacement itself took about 2 minutes. If your mixer is more modern, you may not need to make any adjustments like we did. Just take a picture of how the wires attach and duplicate that with the new wires in the cord.

i disassembled the mixer until i could remove the worm gear; is in a housing that that includes another gear and shaft. make sure you have a magnetic tray to put parts in as you work or you will spend more time looking for parts than reassembling the mixer. once you have the gear housing out you will need a small diameter punch to drive out the pin that holds the gears in the housing(i used a 5/32 transfer punch.) make sure you punch the pin out where it will be caught or you will need to order that part because you will not find it. after knocking the pin out it is just a matter of removing the old gear, putting the new one in, and reversing the steps and getting everything reassembled.

I watched the university of YouTube videos, and followed their instructions.

Removed back cover, disconnected the 2 push-on connectors, removed ground wire screw. Reversed the process to install new cord.

With the mixer being over 30 years old we believed it has going to have to be replaced. However, my husband jumped on uTube and looked at reviews for the problem. Motor was only running on high speed. Reviews said to replace the phase control board. Repair was very quick by just taking off the cover. Removing the old board and connecting the new. Mixer is working awesome once again. In such a disposable society it is great to be able to fix vs trash. Happy Baker.

We simply replaced the gear with the new one. It was very easy to install.

followed the emailed instructions from your company
worked perfectly
thanks

I decided to update the motor brushes in our KitchenA id mixer even though it operated perfectly for years. After installing the motor brushes, you sent,I plugged the cord attached to the mixer into the outlet. I selected 1 on the speed selector and nothing occurred. The mixer would not operate. I then checked the outlet to insure there was voltage present; there was voltage present. I again plugged the cord of the mixer into the outlet, selected 1, then 5, and finally 10, with no results. The mixer would not operate. Finally, I removed the motor brushes I had received from you and installed the old brushes that were originally in the mixer, plugged it in the outlet, selected 1 and the mixer operated perfectly as it did BEFORE installing the brushes you sent.

Tried new brushes but alas it looks like it was a controller. Wife needed it asap so Ii bought her a new one. Service and delivery were quick but couldn't wait for a second part to try and repair it again.

just as the you tube instructions said.

Really no help from Kitchen Aid sources; but phone call to PartSelect solved the problem. Kitchen Aid repair line didn't even know the part #! Thanks to Part/Select, Christmas cookies are being made.

To access the interior of the mixer, I first removed the single screw holding the cup-shaped part at the rear. Then I removed the 4 large screws on the under surface of the mixer head. Next I removed the bright metal ring around the planetary gear area by prying it off. I then pried the dish-shaped part off the shaft using a large-bladed screwdriver. This exposed 5 screws on the circumference of the planetary gear. By removing them, one can pull up the gears and see into the area below. I found the worm gear had fractured. By removing 3 screws at the base I extracted it for closer inspection, checking for any loose pieces. Beware of the jelly-like grease. The replacement part goes into position, and one then follows the steps in reverse.