Tip & How-To about Food Mixers

Kitchen mixer brush repair and yearly maintenance.

If your unit has not been serviced in a while, or never, you could have one or more problems. 1'st watch the armature through the slots at the rear of the unit. This is where the brushes are. While operating the unit see if they are arcing serverely. If so you will need to replace them. You should be able to get them at www.repairclinic.com Replacement should be straight forward. Lay it on it's side. Remove all screws holding the case on. Removing the brushes is different on every unit but the procedure should be obvious. Inspect the armature for grooves and wear. You may have to get a new armature also. If the armature is not too bad using crocus cloth (very fine sandpaper on cloth, it comes in a roll, available at Lowe's) smooth out the armature before replacing the brushes. While you have it apart clean any old grease and dirt out of it. Lubricate the bushings on the ends of the shaft with light machine oil such as 3-in-one. Wipe up any excess. If your unit has a gear reduction and it is accessable lubricate it with light grease, do not overdo it, you only need a small amount. Reassemble the unit and you should be good to go. To keep your unit running it's best you should perform the lubrication/cleaning procedure every year.

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revolves slowly, smoke from back


Houston we have a problem!

Smoke is from only one of two issues:
1 (The ugliest) you have an abundance of food dust (flour) in the mixer and it is burning. You will need to do a full tear down and clean everything and re-assemble (Yuck City)

2 (The most unknown) you have electric problems and it could be any of five different parts that need to be replaced

Possible problems are
1 plastic coating on wiring has rubbed off and it is touching metal, unlikely as it would cause a full short and trip a breaker but not unheard of especially if it is the negative line.
2 (The worst) your motor is going or gone. It comes in two parts the armature (most likely) and the field assembly (less likely)
3(The best) the speed control switch has developed a short and needs to be replaced
4 (The hardest) Slow turning may indicate that a bearing is bad at the front of the armature or at the rear (there are two in the machine) causing the armature to bind and smoke
5 (The best) the carbon brushes are worn down to the nubs and they are burning on the commutator part of the armature causing smoking and slow revolutions. my recommendation is to replace the brushes first as they are the cheapest and easiest to fix. After that you are into a full tear down of the machine which will require new gasket new gear grease additional parts to repair with and re-timing the machine to get the speed correct. I realize that there are no directions to accomplish any of the possible solutions. That is for another discussion, first you have to decide if you want to do it yourself or have it done by a KA tech. Please let us know what you want to do as there is help available.

Oct 06, 2013 | KitchenAid 32685 Mixer

1 Answer

worked fine, then didn't- getting power


The easiest thing to check is the brushes. There are two large "buttons" on the sides of the mixer. They have a large slot in them. You can use a quarter to stick in the slot and turn the button counterclockwise. Once removed you will see a spring sticking out. Now this is important. On the other end of the spring is a small carbon bar (the brush) which is square and about half an inch long. Note that there is one corner of the carbon bar, the brush, which is removed forming a flat on that corner. Note the position of the flat so that you can replace the brush in the same position. If you don't then the brush will not contact the armature and the unit will never run!

Once removed examine the end of the brush to see if there is some crud on it, most likely charred flour. Carefully scrape the crud off the brush and re-insert it remembering the above . . .make sure it slides easily into position. If it is sticky then remove it again and clean out the brass hole with a q-tip.

Do this to both brushes and the unit will most likely run.

Of course make sure the outlet you are using has power to it!

If it still doesn't run then there is a problem with the control board or the motor.

Mar 27, 2010 | Food Mixers

1 Answer

mixer will not start


The motor slides in from the rear, which in held on by just a couple of screws. I would check the brushed first to be sure they are not worn. They are the two big plastic slotted screws to either side. I have seen them actually melt from the heat as they get worn. You may need to clean the armature with a glass brush when cleaning them.

Nov 28, 2008 | KitchenAid K45SS Classic Stand Mixer

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