I have a refurbished KitchenAid KP26M1X LC 575 watt stand mixer that is binding up when under load: I was making a stiff dough recipe today using a beater blade; the mixer began to bind up and would get stuck as it tried to spin the dough. I stopped and let it cool down and split up the dough ball, but the mixer now stops turning whenever there is a load on the attachment. The mixer turns fine when the bowl is empty; it rotates and the planetary motion works fine. It's only when it's under load that it stops and binds. I'm assuming a gear is stripped, but am not sure which one. I'm comfortable with taking it apart and replacing the part, but would appreciate some guidance. Thanks!

SOURCE: KitchenAid 600, Stand Mixer -

Hi. Stop using your mixer. If your mixer is still covered by warranty, call Kitchenaid Customer Service, they are very good with warranty repairs.

If your mixer is out of warranty, remove the silver band that surrounds the top of mixer. Remove the top cover. At the front of the mixer, locate the transmission housing which is now exposed. Examine this housing carefully for cracks. If you find cracks anywhere in this housing, you have found the under-engineered plastic transmission housing. Kitchenaid's replacement housing is made of metal. Your plastic housing has no business being in a mixer that is marketed as being able to mix bread dough. It cannot!

If you're confident that you can make the repairs yourself, go to the Kitchenaid website and download the parts drawings. Remove the Trans. housing, remove the worm gear shaft assembly which is driven by the motor.. Remove and save as much grease as necessary to thoroughly inspect the worm gear. Inspect the worm shaft bearings. Look for cracks, or missing pieces on the bearings. Look for crunched cogs on all gears. Be prepared to wait at least a month for your parts to arrive after you order them. The replacement grease should be Shell Darina 2, or Chevron FM ALC EP 2.

If you're not confident about repairing this yourself, call Kitchenaid and determine the nearest "approved" repair shop.

You may be able to pressure Kitchenaid to pay for the damaged parts in your mixer. They are still installing these plastic Trans. housing on new mixers. Insist on a metal cover when replacing. Apparently, Kitchenaid feels no shame in their manufacturing process, and will not issue a recall notice for these housings. They are substandard at best.

If you found this solution helpful, please rate it. Good luck! ricardok45.

SOURCE: Thumping Noise Under Duress

Hi. Your problem probably lies in the plastic transmission housing. This cheap piece of plastic has no business in a high priced mixer, as it has two important shafts that depend on the integrity of this housing for their bearing seats

Remove the top cover from the mixer. At the front top of the mixer is the trans. housing. Examine this housing carefully for cracks. If you find cracks, then you have new damage inside the mixer. If, when you replaced the three gears, I suspect that you did not discover the cracks in the trans. housing and reinstalled it after you replaced the gears, or you may have missed internal damage from the first breakdown.

When this cheap plastic part fails, it can destroy the worm gear, it's bearings and the bearing seats and possibly more.

Kitchenaid's replacement housing is made of metal. Kitchenaid markets these mixers saying it can handle bread dough. The ugly truth is they cannot!

You must open the unit up, remove and save the grease if it's relatively new. You must check every moving part in the mixer's transmission. You have to remove grease from these parts in order to find the damage. When you have the unit repaired, sell it!

I had the same problem with my mixer. I replaced all of the broken parts, and sold it. Since then, I bought a used Hobart N50 ( 5 quart), and an A200 (20 quart) mixers, both of which are commercial mixers. Both of these can handle heavy dough and they do so with ease.

Kitchenaid, to this date, have refused to recall these trans. housings, even though thousands of these cheap plastic housings have failed. Good luck with this saga!

If this solution has assisted you, please rate it. ricardok45

SOURCE: The dough hook is stuck in the beater shaft of kitchenaid mixer

It sounds like it got overloaded when you last mixed dough. It will only come off the way it went on. If it has been bent on, it may need a bit of gentle encouragement.

SOURCE: I have a KitchenAid Professional

Don't worry about the Worm Gear for now. You have to make sure that the Motor
is fully functional by itself: Remove the Transmission Housing Cover (4 screws) and
the two screws holding the Motor down. Lift the Motor off the Worm Gear and set it
on the side (be careful of AC voltages from the Motor and Control Assembly).
Select Stir setting and observe the motor shaft. Is the Motor running? If it is,
Select other speeds to see how the motor performs.
With the motor now fully functional, you can now check the Worm Gear Follower
for worn out/broken teeth. Remember the motor drives the Worm Gear, it then in
turn drives the Worm Gear Follower (you may have to remove the grease to see it)
The Bevel Gear sits right on top of the Follower and drives the Attachment Gear.