4KB25G1XMC5 KitchenAid Mixer - Instructions

After removing the single philips screw from the back of the unit, the metal band will come off. Under the band you will find 4 phillips screws. Remove them to get the cover off of the unit. Once open, access the gear box in front by removing the four philips screws holding the gear box cover down. Remove any old grease from the unit as there may be pieces of broken gear in the grease that will damage the new gears. I used a small plastic scraper, some paper towel, rubber gloves and q-tips to get all of the grease out. Try to make a note of how much grease you removed and from where, so that you can replace about that amount later and in the correct spots. To remove the bevel gear remove the split ring holding the bevel gear down on the vertical drive shaft. Once the ring is removed it will be easier to move the bevel gear, but I found that it was somewhat press fitted on the shaft and I needed to use some channel locks to gently rock it back and forth to get it moving up the shaft. I then, also, (since I was in there) replaced the worm gear underneath the bevel gear by tapping the retaining pin out of the hole above the worm gear and then tapping down on the vertical drive shaft with a hammer to push the planetary gear down and out of the unit. Once free, I then regreased the planetary and reinserted it in the holder taking care to align the gears on the shaft and the panetary housing. Then I tapped the worm gear all the way down to the base taking care to keep the recessed notch on the top of the worm gear parallel to the pin hole above it. Then I replace then pin and tapped the bevel gear down onto the top of the worm gear and replaced the split ring. Realigned all of the horizontal and vertical gears and then repacked the grease. Closed up the gear box and test ran the unit on low. THen closed up the rest of the unit in reverse of opening.

Remove the top cover , inspect the gears . In my case the worm gear and the gear follower worn out . I removed the damage gears and the old grease , clean the inside and reinstalled everything . Now , the mixer is working good again.

First and foremost, I am not mechanical at all. I typically refer to parts as thing-a-ma-jigs, and whatca-ma-call-its. When it froze up and started to make a loud grinding noise, I guessed it was a gear problem. I decided to try to take it apart, What did I have to lose? If I couldn't figure it out, I would be down a mixer. I was already down one as it was. It was very easy to take apart and I could immediately see what gears needed to be replaced. Parts Select made it very easy to see what parts I needed. And delivery was lightning fast; the next day after it shipped! I found a PDF on line on how to dis-assemble and re-assemble the mixer. I got it together and it mixed for a few minutes and froze again. I took it apart and realized that I didn't have the whatcha-ma-call-it (worm gear) seated properly. Fixed it and put it back together and put it to the test. Working just fine now! Thank you Parts Select for making this very easy!