The brushes are not square, but have one corner cut off. use a flashlight to see which direction the brushes must be put back. clean the ends of them well with a cotton cloth before reinstallation.
try spinning the rotor-head by hand, then try turning it on (sometime junk is stuck between the brushes and the commutator (motor).
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Make sure that the carbon brushes are not worn out or if you have already had them out make sure that they have been put back in properly. There is one corner ground off each brush that needs to line up with a blocking corner in the brush holder. Then get your multi meter out and check the unplugged main cable for continuity to the speed control panel. Then check each half of the field assembly for continuity from the speed control plate to a brush holder. Check you have no broken wires to the speed control plate. Check that the switch on the speed control plate is functioning. If all that tests OK I'd replace the phase board, it's worth not much and worth a shot.
Remove the brush caps on the sides of the motor housing and check the carbon brushes. If they are worn out replace them. They are keyed and will only fit properly one way so be observant. If that's not the problem remove the back cover and check for broken wires on the black control plate. Make sure the switch on the bottom inside of the control plate is making contact. If still faulty check the cable for continuity to the control plate, cable connects to the black wire and the white wire on lower left of control plate. After that you need to check for continuity of the field coil windings. Only thing left after that would be the phase board pcb just above black speed control plate at the back.
Check the motor carbon brushes, remove the back cover and check for broken or disconnected wires. Using a multi meter check the main cable for continuity from wall plug to the speed control board. That will be the black wire and the white wire at the bottom on one side of the control plate. After that check fields for continuity, that will be between the 2 wires on the bottom on the other side of the control plate and the brass insert inside the brush holders. One of the wires will be a circuit through the fields to one of the brush holders.
Have you taken the brushes out of the mixer at any point? I see quite often people remove the brushes, and then they are inserted incorrectly when put back in, the brushes will fit in in any direction, but there is only one way to put the brushes in properly.
when you look at the brush, the carbon portion is square with one side cut off, the brush holder inside the mixer is shapped the same way. use a flash light to match up the brush, after installed correctly the mixer should turn on and function correctly.
If it does not then you should call into us, when around your mixer and we can do more trouble shooting over the phone.
Did you remove the carbon brushes. If so they go back in any of four ways. But only one way works correctly. If you did not remove the brushes then you need to set the speed timing on the speed control switch at the rear of the machine and you can find a YouTube video on this exact exercise on YouTube of course. You may have also reattached the wires to the speed control switch to the wrong connectors hence no work.
My first guess would be the speed control plate. It has three screws in an upside down triangular shape. The two screws on top control and adjust speeds 1 thru 6, and often times just one screw being out a 16th of a turn will shut the mixer off completely. I would venture that when you were removing the two stud bolts you moved the adjustment screws on the speed control plate. Remember that even a slight movement can shut down your mixer, take a phillips screwdriver and turn the top left screw one quarter turn while the machine is on, it can start on you so don't be shocked and jump with a loaded screwdriver in your hand at the back of an electrical device, stay calm, if no start then try the left screw a quarter turn, if it does not start go to a half turn on each screw, if still no start turn thr screws back to the start place and try the bottom screw a quarter turn left and right, if you do not start by now, then something is wrong in another place, go back to the brushes and take them out and check how you put them in, these are the two most common problems with a no start mixer. If this does not fix your problem or get the mixer to start please come back here with more info. If you motor raced in the first place then I would suspect the phase control board, but when it came back to normal speed it leades me away from the phase board. When the phse control board goes out the mixer only works at high speed. So please let us know so that we can help further.
The possible problems could be in no real order>>> 1. your power outlet in your house 2 the power cord to the mixer broken or shorted 3 the speed control plate inside the mixer needs adjusting or replaced 4 the carbon brushes inside the motor head of the mixer need replaced 5 the armature a motor part 6 the stator a motor part The first four are easy fixes the last two will require a full tear down. but there are lots of things to test first. let us know.
Hi JIM, Happy New Year! From the symptoms you describe of your sister’s mixer it appears there are a couple of issues that need to be addressed. Issue #1, when your sister found the loose governor counterweights that should have been a clue that the governor needs to be replaced. The counterweights should not come off the governor.From your description that you “put everything back together, the actual mixer runs (but a little too fast on slow)” is an indicator that although everything went back together, the governor is still not functioning properly, so it still should be replaced. Issue #2, which concerned you more, was “the arcing that is constant on the actual contact points that turn the motor on and off.” The contact points you refer to are the mixer’s electric motor brushes, and although arcing continuously occurs (that’s why the mixer head gets hot during heavy usage) under normal operation, it may be time to inspect and replace the mixer’s brushes; the more worn the brushes, the greater the arcing, which makes it more noticeable while more heat is produced. Before going too much further, be sure to have your Parts List Manual on hand, too.If you don’t have the original you can easily download a PDF version 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, KSM150P and select the file: KSM150PSWH0.pdf (773.44 KB) listed for your model that appears under Parts List (61). Check to see that this matches your sister’s mixer model. Turn to pages 8 & 9, titled “Motor And Control Parts” which provide an exploded view for the disassembly and reassembly of the mixer’s motor and electrical control components.Locate Illus. Nos. 29 and 19, Governor Assembly and Carbon Brush, respectively.These are the parts that I would replace – one governor and two carbon brushes. 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. 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. 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 and have fun. I hope this helps. Howard, Burke, VA If this solution has been helpful, please rate it, thanks! – hslincoln
This is common problem among kitchenaid mixers. If you are hearing no motor sound what so ever, The likely cause is the carbon brushes are worn or gone completely, and will need to replaced, they are located at the left and right sides of the unit and only fit ONE way. part number for both brushes is W10260958 and comes one in a package. These are a wearable part and when gone will not create an electrical field for the motor to run. If however these are visually OK, the next probable cause of this will be the motor control board, this can cause a great deal of electrical burning smell when it goes. part number for the board is W10119326. The board can be replaced but does require some know how of the unit.Hope this helps