I took my KitchenAid Stand mixer (K45) apart to clean now it won't start. It was working great until then. I have had it for 32 years. My husband replaced the motor brushes per instructions. It still will not work. I miss my homemade bread.
What everyone is forgetting or they just don't know is that...The K45 introduced by Hobart in 1962 and was replaced in 1978 by the K45SS are two completely different machines. With completely different wiring systems. The K45 is wired together with wire nuts and the K45SS used connectors on the Speed control switch. All of the websites posted above are for the K45SS (Stands for Solid State) The manual for he K45SS is easy to get from Kitchenaid as the mixer electronics did not change from it's introduction in 1978 to 1986 when Hobart sold the Kitchenaid division to Whirlpool. The K45 on the other hand is a product and property of Hobart NOT Whirlpool or the Kitchenaid division of Whirlpool. The K45 Manual ... well I just can't find one! They way wires are routed is totally different in the K45 from the K45SS so the diagram in the K45SS manual does not help. Also the brushes in the K45 were square not camphor-ed like they are in the K45SS so there is no right or wrong way to insert the brushes in a K45. Whereas; in the K45SS there are four ways to insert the brushes in their holder and three of them are wrong. The K45SS brushes go into a completely different brush holder than the K45. The K45SS is the same today in 2012 as it was in 1978. The K45 is the same only from 1962 when Hobart introduced it to 1978 when it was replaced with the new Solid State model. prior to 1962 it was the K4-A model and it was different entirely. So if the people asking for help say their mixer is a K45 we should be asking for clarification as to a K45 or a K45SS.
The brushes go in only one way!!!!
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! This is most likely the problem your husband caused, he put the brushes back inthe wrong orientation and they are not touching the commutator on the armature..
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.
assuming he put the brushes back correctly then the next step is to take the rear cap off and check out the control circuit, the stator and the armature. Here is the parts list with exploded view:
http://shared.whirlpoolcorp.com/assets/p...
and here is the service amnual which includes instructions on how to troubleshoot electrical problems.
http://lib.store.yahoo.net/lib/mendingsh...
Bob
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We already tried that. My husband replaced the brushes with new ones but that didn't help.
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