Question about Hobart A200 Stand Mixer

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Mixer just hums, does not turn

Brushes appear to be in good shape, Clean the armature with emery paper. Armature spills freely. mixer arm turns freely. Help!!

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Has the armature worn down so the insulation is higher than the copper plate which the brushes run on,if so trim down to below plates

Posted on Jul 07, 2010

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1 Answer

Kitchenaid connection problem?


The bad sparking can be several different things. The bad sparking at contact points or burned contracts on the switch can be caused by a faulty phase control or wrong wiring. Open the mixer, check wiring, if that is correct remove an replace the phase control board.
If the bad sparking is at the motor brushes this can be caused by worn motor brushes, rough commutator, faulty armature or shorted motor field. First remove the brushes and check that they are not worn to less that 5/16'. Replace with new brushes if excessively worn. If Brushes are fine remove and check armature. you will most likely have to replace the motor/armature assembly.
Thank you,
Colleen
MendingShed.com
800-339-9297

Jan 27, 2013 | KitchenAid KSM150PS Artisan Series Stand...

Tip

KitchenAid mixer not running or needs new brushes.


If you run your KitchenAid mixer long enough it will need new brushes. Symtoms would be eradic running, runs slow (no additional noise) or a smell of sulfur when running.

If your unit has any of these symtoms you should change the brushes. Brushes are available at http://www.appliancepartspros.com/Appliance-Parts/Kitchen-Aid-Mixer-Parts/index.aspx . They cost $3.55 each and you will need two.

First remove the screws holding in the brushes and remove the brushes.
The brushes have one corner which is shaved off at a 45 degree angle. Make a note of which direction it is facing as this is how the new brushes must be orientated in order to seat properly.

The brushes are located on opposite sides of the main mixer body under a black cover plate with a slot. Remove the cover while holding onto it as it is spring loaded. Remove the brush. Do the other side also.

Remove two screws from the rear of the unit holding the cover between the two halves of the unit (top and bottom). You will need to remove all the screws on the underside of the unit. There should be four total.

Next you will have to remove the power beater driver located at the front of the unit.The shaft located vertically has a pin in it which needs to be driven out with a punch and hammer. Then a "C" clip must be removed from the shaft. Use a "C" clip plier available at any automotive parts store. Place the ends in the holes in the tips of the "C" clip and squeeze. This will release the pressure on the shaft and allow the clip to be removed.

Next pry the bezel off around the exterior of the plate which will expose about 6 screws which need to be taken out. When all the screws are removed you can remove the head assembly as well as the top of the unit exposing the motor armature. The armature will be the blackened, segmented part of the armature directly under the brushes.

At this point you should be able to see how burnt the armature is. Using crocus cloth (available at Lowes or Home Depot) clean the armature until it shines. Do not sand it any more than necessary or sand flat spots in it. A light contact is all that is needed.

Clean the armature with any good electronics parts cleaner, available at Lowes or Home Depot, to get rid of any filings. Clean up any filings or dirt in the unit.

Relubricate The gear box with light grease if necessary. Reassemble the unit and install the new brushes. The brushes will only go in one way and work. If inserted wrong, the unit will not run. The brushes must be seated on the armature.

During the assembly process remember to use Lock Tite on all screws to avoid future problems.

Thanks for using FixYa and for the great rating.

hardrocko

on Dec 01, 2010 | KitchenAid K45SS Classic Stand Mixer

Tip

How to repair a KitchenAid mixer.


If your KichenAid mixer doesn't seem to have the power it once had try the following repair procedure.

More than likely the armature needs to be cleaned if you have made sure that the brushes are OK. The brushes are acceptable if they have 1/4 inch of carbon left. Disassembly of the unit is not that difficult.

First remove the screws holding in the brushes and remove the brushes. Make a note of which direction the 45 degree off set faces or you will have to dissable the entire unit to get the brushes in properly. Remove two screws from the rear of the unit holding the cover between the two halves of the unit (top and bottom). You will need to remove all the screws on the underside of the unit. Approximately 6.

The shaft located vertically has a pin in it which needs to be driven out with a punch/hammer. Then a "C" clip must be removed form the shaft to remove it. If you do not have a "C" clip pliers you can get them at most automotive parts distributors.

Next pry the bezel off around the exterior of the shaft which will expose about 6 screws which need to be taken out. Now you can remove the head assembly as well as the top of the unit exposing the motor armature. When reassembling this drive unit use some Loctite on the threads of the screws to prevent them backing out. This is a common problem with these units.

At this point you should be able to see how burnt the armature is. Using crocus cloth (very fine emery cloth) available at any home improvement store such as Lowes or Home Depot, clean the armature until it shines.

Clean the armature with a solvent to get rid of any filings or debris that was left from the cleaning process and wipe the entire unit clean.

Reassemble the unit and it should be as good as new. Remember to insert the brushes the proper way or the unit will not work. They are keyed.

Thanks for using FixYa and for the great rating.

hardrocko

on Nov 30, 2010 | Food Mixers

1 Answer

Sparking at brushes


This isn't abnormal although cleaning the armature with fine emery or sandpaper can help.BTW, new brushes will always need a period of run-in before their contact with the armature has reached its best.

Nov 27, 2011 | Food Mixers

1 Answer

Won't turn on after first use. 1801 220 watts hand mixer looks like 2562 250 watt mixer


It seems that the mixer is overheating and tripping the thermostat thus preventing further use. I would recommend a thorough overhaul. You will need to carefully inspect all the components, particularly Items the brush assemblies, and the commutator portion of the armature (where the brushes touch the armature), and everywhere else in the motor compartment. Any parts exposed to oil will need to be degreased and dried before reassembly. When you reassemble your mixer, the brushes can only be installed one way. Make sure the brush's concave contact face is resting completely on the armature. If it is turned it 90 degrees too much, it wont' seat properly and the motor will not get any juice.
While your mixer's apart you should check for any other unseemly wear and tear on the gears, etc. You may find more things that need fixing, adjustment or replacement.
You may find it easier to replace the brushes than degreasing them. I recommend using a food-grade grease that you can order online (although I've seen automotive bearing grease used too - your call). If you feel this is beyond your capabilities and will be too difficult to do by yourself you can take your mixer to a local small appliance repair shop and have them troubleshoot and fix your mixer.

Dec 12, 2010 | Sunbeam 2562 250 Watts Hand Mixer

1 Answer

Kitchenaid mixer won't run changed out brushes and have changed them out in all 4 different positions


The brushes need to be seated onto the armature. Try going from off to high quickly and tapping the motor housing. Once the motor starts, let it run for 15 min plus to seat the brushes. Keep clear of or remove beaters whille trying to get the moror running. In brief, the brushesaren't making good contact with armature. Good Luck

Aug 11, 2010 | KitchenAid KSM90 Ultra Power Series Stand...

1 Answer

Trying to replace carbon brushes on Kitchenaid stand mixer. I understand from reading other answers that there is a ''right way'' to insert them. I did not pay close enough attention in removing old ones...


Check the brushes. They get caked up with burned flour. Remove the brush caps and pull the brushes out by their springs, being VERY careful to note the position of them since they only go back in one way. Measure the free length of the spring before pulling it out. It is critical that you write down the length sticking out with very slight pressure on it so that it is seated against the armature when you measure.

Clean the curved surface of the carbon brushes with a sharp knife being careful not to scratch the curved surface. If you have them installed wrong they will not go all the way in and will not contact the armature and it will not run. Measure the length, as done above, of the spring to make sure it is in correctly!! If it is not in correctly the spring will stick out 1/4 inch longer than it should.

Keep turning the brush until you have the shortest amount of spring sticking out when you press it in all the way then slowly release pressure on the end of the spring. You will know when it is in correctly since the difference in length is noticable. The curvature on the front of the brush must line up with the curved surface of the armature which runs from the front of the mixer to the rear.

Apr 18, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

My mixer made a grinding noise, so i oiled it


I am assuming that when you oiled it you merely squirted oil in various places without actually taking the mixer apart. You probably did a good thing if....if....it corrects the grinding noise...but...oil is not only an excellent lubricant it is also a very good insulator and if you got oil into the switch area where it turns on then you may have got oil inside and it can be insulating the place where electrical contact is made. For a possible quickie solution you might try to use something to eliminate the oil that may have got into the switch. Best thing is probably to go to Radio Shack and buy their contact cleaner spray can and use it on the switch. That stuff is real expensive though. A cheaper solution might be to use isopropol alcohol if you have some handy or even spray carburetor cleaner as both of them will completely dry quickly. Be sure to unplug the unit before doing this and allow it to completely dry before plugging back in. You can do all of this without taking anything apart. If it then runs ok then I suspect the grinding noise is still there as the gears inside probably need a little grease. If you want to go that trouble you can remove screws and open the case up...carefully...and put a dab of auto wheel bearing grease on your finger and rub it into the area where the gear teeth are. Do not use a big gob of it ... just a little amount is all needed. If you do not have any grease handy you can use vasline if you have some in the house. If the mixer did not turn on after the above dousing of alcohol etc. from the outside then you may need to do the cleaning directly on it from inside...so if you do take the mixer apart spray the cleaner directly inside the switch. When you take the mixer apart do not remove the shaft/motor/armature or other parts...remove only the cover and enough to do the repair. The possible problem is that if you take it apart too much it will be difficult to get back together particularly if you remove the armature and contact area of the commutator where the carbon brushes are. While inside there though look at the copper commutator area where the tiny carbon brushes make electrical contact. They may be pitted or not allowing the brushes to make good connection. To correct this you can spray contact cleaner directly onto the contact area to clean it. Let it dry and reassemble and the mixer should run ok. If the mixer is very old and been used a lot then the contact area of the commutator may be worn so badly that it does not make good contact with the brushes or the brushes may be worn down so much that they no longer make good contact. In that case you would need to actually remove the armature assembly...what I told you not to do above if you are not too good at reassembling things. Once the armature is removed it is easy to take some fine grit sandpaper and clean the copper commutator making it clean and bright copper color like new again. Also if the carbon brushes are almost totally worn down you probably can find some new ones that will fit ok by taking the old ones to your local hardware store as many of them stock carbon brushes nowadays. If you do all this and are able to reassemble the mixer then it should be just about as good as new again. Hopefully you do not need to go to all the trouble of the major disassembly though. Good luck.

Aug 22, 2009 | Food Mixers

1 Answer

Which way do the brushes go on the K45SS stand KA Mixer?


Look carefully at the bruch, it should have a cupped chape that matched the curve of the armature. If it went in wrong, you may have wither broken the brush, or messed the armature. You can get new brushes online from many parts retailers, just google you part number and the word "brushes"

Jan 18, 2009 | KitchenAid K45SS Classic Stand Mixer

3 Answers

Assembled parts incorrectly


The rectangular rods are the motor brushes. They will have a rounded shape to them and as long as you have the rounded edge match the rounded shape of the armature it does not matter unless there is some kind of groove to force orientation of the brushes.

Dec 16, 2007 | KitchenAid KSM5PS Heavy Duty Stand Mixer

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