Whirlpool WP9709231 Worm Gear OEM Part

This time I replaced the front and rear bearings and thrust bearing and all the gears. The hardest part is thoroughly cleaning out all the old grease. After re-greasing and assembly mixer ran like new. I wish a more robust worm gear was available. A snap ring plier is a must for this job.

Opened up transmission housing and removed all gearing to inspect for worn parts. The Professional 6 is all metal (except for the transmission housing cover) so just a couple of gears looked worn. Planetary needed adjustment, although the gearing was solid. Replaced the transmission housing cover with a new metal version. Cleaned out the old grease (all that grease...) and repacked the gears. Closed it up, ran it for 30 minutes to set in the new grease, and everything sounds smooth and quiet. Two things if you decide to try this very doable rebuild: You will need high-quality snap ring pliers. I fought with that thing for over an hour because my snap ring pliers were substandard. Also, be prepared to deal with grease. Lots and lots of grease. I also give Appliance Parts Pros highly my highest recommendation for quick service and high-quality parts. They were a pleasure, start to finish (especially Tiffany B).

I make a lot of bread doughs with my KitchenAid mixer, and it's used 2-3 times a week for large batches of dough. The gears began slipping, and I decided to take the mixer apart, and replace the worn gears. Replacing the transmission housings plastic cover, with the newer metal one will probably result in me not having to repeat this process, as the plastic one broke at the screw holes under pressure. I also replaced the worm gear, and the sleeve bearings.

Looked online for parts and drawings to see how it went together and found appliance parts pro. They had the most complete set of parts in stock of several places I checked. The drawings were great so I could see how it came apart. Went out to the garage with it and took it apart. Checked the drawings and watched the video (video was an older mixer but close enough.) Found a worn worm gear and the mating gear with several missing teeth. Ordered parts with 2 day shipping. Cleaned all the old grease and metal shavings out (that was the most time consuming part of the project), regressed it and put it back together. Really appreciated the drawings because I forgot which end a set of ball bearings went on and the it was easy to tell from the drawings. Back to making bread again.

My brother saw the parts on the counter when they came for dinner. Well that was it, he loves doing that kind of stuff so I said go for it. It was a Kitchen Aid professional mixer, it took him about 30 minutes to complete Works great was a lot easier then I thought it would be.