Question about KitchenAid ProLine 600 Stand Mixer

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The mixer, Professional 550 HD, makes a prominent grinding sound every time we run it. We have not tried to repair it.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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ricardok45
  • 135 Answers

SOURCE: Kitchenaid mixer makes a clanging noise

Hi. If your mixer is under warranty, call Kitchenaid. They are very good at replacing mixers under warranty.

If you are out of warranty, this is where the fun begins, NOT!

Remove the silver band from around the top of mixer. Remove 4 screws that secure the top cover, remove cover and at the front top of the machine locate the transmission cover. Inspect this cover carefully for cracks. If you find cracks in it...You have just discovered Kitchenaid's dirty little secret. A cheap plastic transmission housing! The failure of this cheap part is the cause of all of the rest of the damage inside the mixer, which may include a destroyed worm gear and shaft, destroyed bearings and their seats. You're not alone. I estimate that thousands of these plastic parts have failed causing great damage to the rest of the mixer

Kitchenaid's replacement housing is made out of metal. If you feel up to the task of repairing the mixer yourself goto the Kitchenaid website and do a search for the parts catalog for your mixer model, these will assist you with disassembly, reassembly and parts ordering.

If you're not up to the task, take it to an authorized repair place once you have put the cover back on.
Even if you're out of warranty, you may be able to have Kitchenaid pay for the replacement parts, they did for my mixer. Be persistent with them and try to get to a manager with your complaint. This cheap piece of plastic has no business being installed on a high-priced machine.

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

Posted on Mar 20, 2009

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  • 118 Answers

SOURCE: kitchenaid professional....

It sounds like you need to change the brushes. You can look up your parts manual online here and then buy them online. Should be under $10.

Posted on Nov 30, 2008

ricardok45
  • 135 Answers

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

Posted on Mar 31, 2009

  • 143 Answers

SOURCE: grinding sounds and slower mixer speeds

It sounds like you may have a broken worm gear inside your mixer which is a common problem.It is a wearable part which transfers the power from the motor to the main drive. It may be chipped or damaged right now, and running it will cause more damage. Part number for the worm gear is W10112253. This does however require some know how to replace. Hope this helps

Thanks

Posted on Nov 22, 2009

hslincoln
  • 235 Answers

SOURCE: Mixer infected by foul demons makes bad noises

Hi, JSTEWART431, are you sure it’s the motor or could it be the transmission gears where the noise is coming from? Are you sure it's the motor or could it be the transmission?
It 'sounds' like you've got some transmission gear issues. It could be as simple as through normal use the gears have shifted slightly in the transmission and the gear teeth are making different contact, hence the grinding noise. The higher the speed, the louder, higher pitched sound you'll get. Alas, the noise may also be indicative of a potential gear failure, similar to my wife’s mixer where the mixer’s increasing noisiness finally ended with a broken tooth on the bevel gear and the mixer 'froze'.
If you are DITY type person, feel adventurous, and your mixer is not under warranty you can troubleshoot it yourself. Be sure you have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website: http://www.kitchenaid.com/flash.cmd?/#/page/home. Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use KSM90P, and select the first file listed under Parts List (16) and then check to verify this matches your mixer model.
Turn to pages 4 & 5, titled: Case, Gearing And Planetary Unit for the disassembly and reassembly of your mixer, along with all the parts. Locate Illus. No. 36, Worm Gear Bracket & Gear, including Illus. No. 7, Worm Gear. I suspect this is the weak link in your mixer’s transmission and causing the problems. After clearing all the grease away, check to see if the gear is just loose, exceedingly worn or broken. If it’s worn or broken you can order a replacement part and install it yourself. While you’ve got your mixer this far apart you can check for any other unseemly wear and tear on the on the gears and other components. Besides a replacement gear, and grease you might consider replacing the gasket, too. You should use a food-grade grease that you can order online (although I’ve seen automotive bearing grease used too – your call).
The next possibility to check would be with the motor itself, but electric motors are pretty simple mechanisms and generally don't fail. Using the parts list, you can see what needs to be inspected and determine if any motor parts need replacement. (Generally only brushes wear out, but I don’t think that would cause your grinding sound.)
Here are five potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com; and Grainger.com. You should search for ‘food grade grease’. Prices can vary widely between vendors, so do your comparison shopping.
It can be messy but quite gratifying to diagnose and repair your mixer yourself.
Finally, here’s a link to an excellent site for disassembling/fixing your KA Mixer: http://www.neilcrockett.com/mixer.htm and another link to a site that details the disassembly and replacement of mixer’s grease, which might be helpful, too. http://www.foodonthefood.com/food_on_the_food/2009/04/how-to-repair-a-kitchenaid-mixer-yourself.html
If you feel troubleshooting and repairing is beyond your capability, then I would seek out a local small appliance repair shop in your area. KA Customer Care can give you names of local KA authorized repair shops in your area, but you can also do an online search to supplement what KA may provide you. Call to explain your circumstances and find out their hourly rate and get an estimate of what they think it would cost to repair your mixer. Also, always obtain three or more estimates – do some comparison shopping.
Good luck. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

Posted on Dec 05, 2009

Testimonial: "Haven't gotten to attempting a fix on the mixer yet, but this reply has been very informational and will certainly be helpful. It is much appreciated!"

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It would be helpful to get the model number and serial number off of the bottom of the mixer. This will help determine if the gearing has changed at all.

Usually when a mixer is making a lot of noise after replacing the gears we can find a small nick or gouge in the gear. even the smallest damage can cause these mixers to make a lot of noise. Also if you have an older mixer there was a change in the worm gear from 53 teeth to 60 teeth on the gear. If your mixer originally took a 53 tooth gear, and you replaced it with the 60 tooth gear it will make a lot of noise like you are describing.

So first check your serial number, if the first 4 digits are after WL45 your mixer would have a 60 tooth gear, however if it is a WL44 or before you would have originally had a 53 tooth gear and this is what is causing the loud noise.

If your mixer is new enough that it took the 60 tooth gear, then take the mixer apart, clean and remove all gears, clean them off with wd-40 and inspect closely, even the smallest chip can cause a ton of noise.

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http://www.samstores.com/product-kitchenaid-5ksm5ebu-heavy-duty-mixer-for-220-volts-%28cobalt-blue%29-16220.html

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Follower. As time goes on, the metal filings from the damaged follower will eventually destroy the Follower and the Planetary will stop rotating.
Sooner or later that gear need to be replaced. Also remember to use new Grease after
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