5KSM125ECU5 KitchenAid Mixer - Instructions

I took out the worm gear and replaced it with the new one. It is important to have the correct punches that are just under the diameter of the pins.

Easy removal of old screw cap, but new one didn't just drop in. Had to scrape paint and a little aluminum to make it fit. Finally did, and it works fine now.

Per a video on this site, I removed the stand part, then removed the rear electrical cover and aluminum band which wraps around the mixer. Next, remove the drip ring and planetary gear (use a punch). Then remove the 4 screws securing the bottom housing and the 5 screws around the planetary gear housing. You should be able to pull the upper and bottom housings apart now. This exposes the control lever. Just unscrew it and replace it. Re-install all parts in reverse order.

Wish that I had known about the video before disassembling. I did not know if it needed a part or was just jammed. It was clear that i needed a worm gear. So I ordered that. It turned out that I needed the Pinion Shaft w/ gear too. So another order. The shipping far exceeded the cost of the parts. NOTE: Clear off as much grease as necessary to be certain that there are no stripped gears anywhere, the order the parts. I took the mixer head off of the stand. I would suggest that you take a bath towel, roll each end towards the center, and place the mixed head so that it is supported on both sides by the towel rolls. NOTE2: Shipping was great 2 days or less. One part arrived on a Saturday. P>S> I do not know the age of this mixer. The age drop down menu should have an UNKNOW option.

1. Removed the mixer from the base by removeing the pivot pin at the mixer base support. 2. removed the retainer ring from the housing. 3. removed the pin from the shaft. 4. removed 5 philips machine screws from the round base. 5. removed the round base from the mixer housing. 6. removed the o-ring from the shaft. 7. removed the shaft and large worm/pinion gear from the shaft. 8. pressed out the pinion drive gear from the mixer. The reverse operation repaired the mixer to new condition.

Order part through parts select. it only took 3 days to receive part. The mixer was very easy to take apart and to replace the gear. it was back together in about 20 min. The video from kitchen aid to repair the unit is awsome. Thanks

Followed directions video on line. good directions.

Repair was easy. Remove the seal ring with a flat blade screwdriver and drive out retaining pin. Pry out lower unit using two screwdrivers, one on each side. Once apart, use spring clip pliers to remove snap ring. Pull out shaft and replace. Clean and lubricate as you reassemble in reverse. Google the model number to get detailed instructions.

Unscrewed 3 Philips screws. Pried out the old screw cap. It had been there for 25 years and had flour, egg, etc. build up over the years. Did use a needle nose plier to lift it out. Put in the new one. Needed a rubber mallet to snug it down. Design has changed slightly over the years. Put the 3 screws back in and as they say in England, "you have an uncle named Bob."

Remove the mixer head from the base by removing the 4 Phillips head screws. Pry off the ring around the rotating part with a flat head screwdriver. Punch out the pin holding the rotating part and remove. Remove the trim strip by removing the two Phillips screws at the rear of the unit. Remove the 4 screws at the bottom of the mixer head. Carefully separate the bottom of the head from the top using a flat screw driver. There will be the power wires connecting the top to the bottom of the unit. It is best to disconnect these wires to avoid breaking them during rest of the procedure. There will be a lot of grease in the gear box of the mixer. The assembly holding the damaged worm gear can now be removed by removing the three screws holding it to the bottom of the mixer head. At this point I removed the grease from the worm gear assembly to allow better inspection. Punch out the pin holding the worm gear to its shaft and remove the shaft. The worm gear is now free and can be replaced. Add some extra grease to the new gear and reassemble the mixer in the reverse order.

removed one screw from back cover, loosened two screws holding speed control plate, removed one wire at a time from old unit to new, screwed two top screws back on mixer,plug mixer back in, adjust speed control screws until I reached correct speed, put back cover back on

Replaced gears and cleaned and re-greased gears

followed the instruction on you tube

Took the mixer down to the gear box. Found the plastic drive gear had a few stripped teeth. Did a search on the internet for the mixer gear. Found a couple of suppliers. Ordered the needed gear, pin and a bearing block just in case it was worn. The bearing block did not need to be replaced. Cleaned the broken off teeth from the gear grease and put the mixer back together. All worked fine when I plugged it in.

I found a video on how to repair mixer that would not turn. Watched video several times and replaced worn worm gear. Getting the old worm gear was the most difficult part of the job. I had to go purchase a pin punch ($5.50) with the correct tool is was easy.