Question about KitchenAid K5SS Heavy Duty Commercial Stand Mixer
So I shredded the nylon gear in my Kitchen Aid K5SS 325W. How can I tell if the motor control board is bad as well? Motor makes no noise when the speed control lever is moved.
Hi DELUNAY. The only way to tell if your speed control assembly is bad it to remove it and test it a local repair shop, but I think from the symptoms you describe, you’ve already answered your own question and your speed control assembly is shot. The fact that your motor is not making any noise indicates to me that it’s not getting power. That can only be caused by two things; a bad speed control board or a burned out electric motor. When you shredded your nylon worm gear, did the motor exude a ‘bad/burnt’ smell (other than possibly ozone)? If not, then I would look at replacing your speed control board/assembly.
Since you know you’ve got to replace the worm gear, you might as well replace the speed control assembly. The inspection and troubleshooting of the mixer transmission is a DITY capability, particularly if your mixer is out of warranty. Just be sure to have the correct Part List manual around when you start to disassemble your mixer. If you're lacking one, you can download it from the KA website (http://www.kitchenaid.com/flash.cmd?/#/page/home).
Click on Customer Care>Locate Manuals& Guides> and enter the 6 character model number, in your case use KSM50P and then select the first files under Parts List (definitely check to see if it matches your mixer. If it doesn’t, continue to look at other manuals until you find the correct manual that does match.)
Turn to pages titled ‘Case, Gearing & Planetary Unit, for the disassembly, troubleshooting, and reassembly of your mixer, along with all the parts. This is where you’ll find your
Besides your shredded worm gear, you can check for any other unseemly wear and tear on the other gears, etc. You may find more parts that need replacement than just a bad gear. You should also consider replacing the grease, particularly if there are gear particles suspended in it.
Besides needing a replacement gear and grease, you might consider replacing the gasket, too. I recommend using a food-grade grease that you can order online (although I’ve seen automotive bearing grease used too – your call).
As far as parts go, 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. Oh and don’t forget to replace the speed control board and associated components, tool
Here are some links to several excellent websites that detail the disassembling/greasing and reassembly of a KA Mixer.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it. hslincoln
Posted on Dec 11, 2009
Testimonial: "Thanks for the advice and sources. Much more helpful than calling Kitchen Aid."
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