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Replaced total gear worm. Replaced all parts. Now machine won't turn on.

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Posted on Jan 02, 2017

hslincoln
  • 235 Answers

SOURCE: just replaced the worm gear and cleaned out old

Hi PEGNGEORGE. I can understand your frustration after getting all that work done for the gear and grease replacement just to find that it won’t run. Makes you want to scream. But before screaming, let's see what might be causing problems.
If your machine is not getting power to the motor, and you’re confident that the motor was not damaged by the stripped worm gear, which necessitated the replacement in the first place, then there are a few things that we can look at.
The easiest to check are the motor’s brushes. During your disassembly, did you remove either or both of the motor’s brushes (from the side of the mixer’s head)? If yes, then you need to check their alignment on the armatures’ commutator. The concave contact face should be resting completely on the comutator. If you've turned it 90 degrees too much, it wont' seat properly and you'll get no 'juice' to the electric motor so it won't start.
If the answer is no, and you said the mixer worked, but not well after the worm gear stripped, that would lead me to suspect the problem most likely will be with your speed control assembly.
Since you’ve already replaced the stripped worm gear, I imagine you have your mixer’s Parts List manual on hand, but if you don’t, 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 K45SSW, and select the file listed under Parts List (1), K45SSWH0.pdf (341.41 KB). Check to ensure it matches your mixer model.
Turn to pages 6 & 7, titled: Motor And Control Parts, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. You’ll want to focus on Illus. No. 25, Control Plate Assembly.
First inspect around the control plate assembly to ensure all the wire connections are OK. It's possible a connection has come loose. Unfortunately the whole controller assembly is fabricated on a little PC board which was not meant to be 'home fixed', and my 'expertise' ends there. A local small appliance repair shop should be able to determine if the controller assembly is functioning properly or not, or you can just order replacement parts without the testing.
As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping.
You may already know about the website links below when you replaced your worm gear, but it’s always good to keep these sites in your ‘toolbox’. Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

Posted on Dec 15, 2009

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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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Download a Copy of the Kitchenaid Service manual.

http://www.kitchenaidparts.be/centers/servicemanual/mixer.pdf

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It is not a good idea to modify anything in the unit to make part(s)
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When you replace the worm gear, you should be able to see if you need more grease. This will have been the "oil" you saw escaping.

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Hi PEGNGEORGE. I can understand your frustration after getting all that work done for the gear and grease replacement just to find that it won’t run. Makes you want to scream. But before screaming, let's see what might be causing problems.
If your machine is not getting power to the motor, and you’re confident that the motor was not damaged by the stripped worm gear, which necessitated the replacement in the first place, then there are a few things that we can look at.
The easiest to check are the motor’s brushes. During your disassembly, did you remove either or both of the motor’s brushes (from the side of the mixer’s head)? If yes, then you need to check their alignment on the armatures’ commutator. The concave contact face should be resting completely on the comutator. If you've turned it 90 degrees too much, it wont' seat properly and you'll get no 'juice' to the electric motor so it won't start.
If the answer is no, and you said the mixer worked, but not well after the worm gear stripped, that would lead me to suspect the problem most likely will be with your speed control assembly.
Since you’ve already replaced the stripped worm gear, I imagine you have your mixer’s Parts List manual on hand, but if you don’t, 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 K45SSW, and select the file listed under Parts List (1), K45SSWH0.pdf (341.41 KB). Check to ensure it matches your mixer model.
Turn to pages 6 & 7, titled: Motor And Control Parts, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. You’ll want to focus on Illus. No. 25, Control Plate Assembly.
First inspect around the control plate assembly to ensure all the wire connections are OK. It's possible a connection has come loose. Unfortunately the whole controller assembly is fabricated on a little PC board which was not meant to be 'home fixed', and my 'expertise' ends there. A local small appliance repair shop should be able to determine if the controller assembly is functioning properly or not, or you can just order replacement parts without the testing.
As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping.
You may already know about the website links below when you replaced your worm gear, but it’s always good to keep these sites in your ‘toolbox’. Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.
Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it, thanks! - hslincoln

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