The head seems loose

Are you engaging the head lock during operation? if not that is why it is loose. If you are it is not uncommon for the head to move around a little under heavy loads, when I make bread the head is always trying to come up so I have to use the head lock switch whenever I use the mixer on bread. It is the only time I lock it down.

This could be the pivot rod between the head and the column being loose and out of place. Or it could be the hook activated by the lock lever not engaging properly. See the following Service Manual:

http://www.kitchenaidparts.eu/documents/pdf/service-manual/classic-svc-manual-new-email-version.pdf

What model number is your machine? Try turning it on it's side and shake a little, take a very small screwdriver and grind away to crack the brush and shake it out. Otherwise it is a full tear down to take the brush holder out. Hope this helps if not get back to us for help

If you have also tightened up the screw that you can see from the front in the middle where the hinge pivots when head us up then that's where your problem is. That is the head height adjustment and is to set the flat paddle to just clear the bowl when the head is down.

I am sure you are locking the tilt head in the down position when your using it right? If so then check to see if the beaters are hitting the bottom of the bowl. If they are then there is an adustment screw that sets the height of the head in the down position.

The BUSH on the spindle is worn out. You will notice that liquid blending might make the liquid to flow out through this . If so it is confirmed. This is usual as the food particles gets caught on and wear off the bush in due time.
the blade unit has to be taken out and the bush must be changed after choosing the right bush for the steel spindle.
You can confirm rotating the spindle and see if this shakes.
Hope this tip confirms the fault.

the solution to this is to tighten the screw visible through the base that intersects the pin. Turn the machine upside down and using a long flat screwdriver tighten the screw.

Hi MJANKOW520. I?m going to assume your KA mixer is a ?Tilt-Head? mixer. You don?t say specifically. Based on your description of the symptoms you mixer exhibits, I would say that your head locking mechanism (or a component) of it is either broken, worn or loosened due to normal wear and tear and need to be readjusted (or repaired) for it to keep your mixer head stationery. The inspection and troubleshooting of the inside of your mixer is a DITY capability, particularly if your mixer is out of warranty. Just be sure to have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website: http://www.kitchenaid.com/flash.cmd?/#/page/home. Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case, try K45SSW, and select the file listed under Parts List (check to see it this matches your mixer model). This parts list manual provides an exploded view for the disassembly and reassembly of your mixer, along with all the part name and numbers. Turn to page3, titled: Base and Pedestal Unit. You?ll want to focus on Illus. #9, Link & Lever Latch assembly, which locks the mixer head to the pedestal when run your mixer. Check to see if something is just loose, exceedingly worn or broken. If something has broken, you can order replacement parts and install yourself. As far as parts go, here are four potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com. Prices for the same part can vary widely between vendors, so do your comparison shopping. Once apart you can check for any other unseemly wear and tear on other mixer components. It can be messy but quite gratifying to diagnose and repair your mixer yourself. Finally, here's a link to an excellent site that details the disassembly and replacement of a mixer's grease, which might be helpful, too. http://www.foodonthefood.com/food_on_the_food/2009/04/how-to-repair-a-kitchenaid-mixer-yourself.html If you feel this is beyond your capabilities and would be too difficult to do yourself you can take your mixer to a local small appliance repair shop and have them troubleshoot and fix your mixer. KA Customer Care can provide you with the name and phone # of the closest authorized KA repair shop in your area or you can do a Online web search, but be sure to get at least three estimates before deciding to commit to one repair shop. Good luck. I hope this helps. Howard, Burke, VA If this solution has helped you, please rate it, thanks! - hslincoln

Remove the back housing by removing one screw and liftingand pulling rearward.
Remove two screws holding the metalic edge trim. This uncovers the seam. Screws are on the back.
Remove four visible screws from the bottom of the head around and near the pillar.
Now gently using a screw driver, push the metallic ring on the mixing head down and off.
This uncovers five more screws about the mixing head. Remove them.
Using a very small screw driver or punch, puch the pin out of the mixing head shaft.
Remove the mixing head housing.
Lift up on the motor housing to remove it.
The motor/gear housing is the top protion of the mixer. Its loaded with grease so do this over a covered countertop or some place easy to clean. The grease won't run, but it can fall out in gobs.
Make sure all sealing surfaces are clean, especially the gasket around the gears. This will insure a good seal. No gear grease in your famous cookies!
Reinstall in reverse.

Lay the mixer on its side and look up through the base. You willnotice a small set screw. This holds the pin tight. If the set screw gets loose the pin willl begin to move out and the head will wobble. Simply tighten the set screw. I just did this to my Kitchenaid mixer 10 minutes ago and it now works fine.