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No, the motors if noisier than usual run a sealed ball bearing and they either need replacement or replace motor. unless you are at all mechanical the latter is probably the better option as the motor needs to be stripped down to press the bearings on and off.
Thanks for the clarification. I have never seen this problem previously in a Kirby. I wonder if the belt keeps sliding off because it's been stretched out? After about 1-2 years, the belts on the Kirby will stretch out to a point where there can possibly slide off the motor shaft. Have you tried just replacing the belt on the unit first?
If you're sure that it's not the belt that may be stretched out, and you'd like to replace the motor shaft, you certainly may do this. The only problem with this is the motor shaft is not sold by itself as a separate part. The only way to purchase this motor shaft is to purchase the entire fan assembly, which includes a new fan, and the hardware necessary on the fan assembly.
In terms of installing it, we've actually recorded a video repair on how to replace the fan assembly, which involves removing the motor shaft in order to get the fan off. Since you have to purchase the fan assembly anyways in order get the motor shaft, you may want to go ahead and replace your fan assembly at this time also. Even though your fan may not be broken, on Kirby's the fans can become coated with dirt and fine dust, which can sometimes lead to the Kirby exhausting a bad smell. If you'd rather not replace the fan, you may remove the motor shaft without disassembling the entire machine, you'll just need to secure the fan somehow so that the fan doesn't spin while you're using a nail to turn the motor shaft off.
Anyways, here's the video repair that we recorded. I hope that this helps you. If you found this helpful, please kindly rate my repair helpful by clicking the thumbs up icons in the top right hand corner of the repair. This is really what keeps Fixya repair professionals continue to give free repairs online.
Here's Part 1 of the video:
Here's Part 2 on Replacing the motor shaft and fan:
If you have any follow up questions, I'd be more then happy to answer them for you, please just add another comment here on the repair page, and I'll be more then happy to answer any follow up questions that you have. Thanks again for rating the repair, I greatly appreciate this.
2.How come it continues to rotate? Motor armature consists of multiple coils and just some of them burned so even though it keeps spinning it does not function properly.
3.Do I need to replace the armature? We have switch replacement instructions HERE and they will take you as far as accessing the motor. We do not have motor assembly instructions yet but if you get that far - motor is not that hard to reassemble. You may have to spend some time getting tolerance ring back in and make sure you install finger spring properly.
Try taking it to a local kirby office and ask them if there is anyone in your area that can refurbish the motor instead of replacing everything. If that doesn't work ask a local dealer or call the dealer that you bought it from and tell them that you would like to trade your old one in for a newer one. I used to work for Kirby and I can guarentee that the Kirby itself, straight from the factory only runs about $200!
check the cord. see if there are any frays. or broken spots. usually it is one of 3 things. 1, faulty electric cord. 2. the attachment or floor nozzle not being properly attached( kind of a duh issue LOL) 3. a faulty switch assy. the switch can be kind of a bear to replace. I hope it is the cord. if not i would take it to a kirby repair person, because it is very easy to damage the motor assy when replacing a kirby switch. trust me i have damaged a few learning how to do it
The carbon brushes in the motor need to be replaced. Very IMPORTANT....... DO NOT run the Kirby anymore until you get this fixed. If you do, the armature will be in danger of being damaged. (and that part is expensive!) The carbon brushes are reasonably priced, and you can use this online guide to get to them and change them. It's a guide for replacing the power switch, but it will help you change the carbon brushes too. Hope I've helped...