Question about KitchenAid Food Mixers
I have a hand-me-down Kitchenaid K45 Mixer. Its an older one with the screw on terminals and says on the bowl base plate it was made by Hobart. The problem is mixer turns on but only runs at one high speed. I have read elsewhere that this is caused by the phase control board. Well my mixer doesnt have a phase control board like this one i see being sold everywhere. Wiring appears different, attachment to unit is different http://www.amazon.com/KitchenAid-Mixer-Phase-Control-9706595/dp/B000PJ7YHI/ref=pd_bxgy_k_img_y I have also read it could be the capacitor, which i am going to try to replace (part #4160325) first. I also am looking for a decent copy of the parts diagram, all the ones i could find on the web or crappy copies or for the newer K45 which doesnt diagram the older version, with the wiring terminals, capacitor and older speed control. I am just trying to get this thing working, if anyone can help with any info that would be great and thanks in advance.
Http://www.scribd.com/doc/176382158/Kitchen-Aid-K45-Service-Manual-For-Hobart-Made-Vintage-Mixers the resistor value is mentioned for r53 as two values of 90 ohms and 180 ohms when measured with a ohm meter. You may be able to hook up a potentiometer of a high power rating and adjust it till you get this resistance value when connected to the motor. then disconnect it and measure the value of the resistance. I can't guarantee that 90 ohms and 180 ohms is the value unloaded from the motor or if the manual is referring to the resistor value while it is across / paralleled across the motor load. The model you have looks like it is a hobart made model
Posted on May 09, 2014
Here's a link to the older non-solid state KA mixer service manual:
I have read on multiple threads that the capacitor is a 1microfarad capacitor that can be found at radio shack for about $2. It's smaller than the original, but should work. The purpose is to reduce arcing on the speed control points.
Also note the speed control calibration setting procedure in the above service manual....
Posted on Apr 22, 2014
Is it a K45 or a K45SS? If it is a K45 you will have to replace the filters inside and probably the speed control plate, if it is a K45SS then you need a new phase control board. The K45 is pre 1978 and the K45SS is post 1978. Your information is correct on pre 1978 K45 models that the capacitor is bad, but it might be cheaper to go garage sale hunting and find a second machine as the parts are no longer made and having spares on hand may be a significant advantage in the future, also there are a great many of the K45SS parts that will also repair the K45 mixer so it may not be a practical solution. Watch ebay regularly for K45 parts, they come up every couple of months. On the parts diagram also look for the K5 diagram as it is identical to the K45, one is a 5 quart mixer and the other one is 4.5 quart, same parts same motor same everything.
Posted on Apr 18, 2013
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Posted on Jan 02, 2017
I just fixed my 8 yo mixer! Would only work at highest speeds... first took it apart because it was making a terrible noise. Tthrough this site I figured out how to take it apart and replace the grease. Gears were in good shape, but a small nut fell out of the back while I was working on it. Finished putting it back together, found the spot where the nut belonged- holding the metal housing of the motor to the head. I turned it on and all I could get were the two highest speeds so I took the back panel off again and played with the bottom screw- it seems to adjust something on the wire that controls the speed. So take a philips screwdriver and adjust that screw and see if you get all the speeds back.
Posted on Dec 09, 2011
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