Knocking sound, pin loose

Try pushing the pin in from the other side, forcing it in is better than making the hole any bigger as a loose pin will allow head wobble when mixing. Get the pin thru the pedestal without the motor, then get the pin through the motor neck then put them together and get the pin thru both parts. You need to have the locking lever in the release position to do this more easily. Make sure the pin isn't damaged on the end. It shouldn't be damaged on both ends unless you've been abusing it.

That is indicative of worn motors brushes or a speed regulation circuit board problem. It is worth getting it fixed.

I just checked and my diagnosis is sound :>)

I have a kitchen aid stand mixer. model #rkt2651x. it goes - Fixya

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52 mins ago - i have a kitchen aid stand mixer. model #rkt2651x. it goes very fast when turned on then shuts off. it will go - Food Mixers question. SOLVED: Mixer goes really fast then stops
29 Dec 2007
Questions, Troubleshooting Help & Support Page 3
28 Jul 2006
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You didn't say which model KitchenAid mixer you have. Assuming that it is a tilt-head, and that the metal portion of the motor housing joining it to the base did not break, the Service Manual can be had at:

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

Remove the chrome drip ring by knocking it downwards with a flat screwdriver and a hammer.....carefully. Then you can get a couple of flat screwdrivers in as levers between the now visible screw heads and the planetary.

Good Morning,

There is a spring inside your mixer attached to the speed control switch and speed control arm, the spring can sometimes get caught on the slide bar that is just below it inside the mixer. The other reason is that the speed control switch plate in the rear of the machine (that the spring attaches to) vibrates the three speed adjustment screws out or in and the spring will pull the speed switch (control arm that you use to control mixing speed when using the mixer) back to the stir position after you try to turn the mixer off.

If it is a spring problem you will have to do a full tear down to get at the spring and either free it or replace it. If it is a problem with the adjustment screws on the speed plate, that can be handled at the rear of the machine and is twice as easy to get at but sometimes much more frustrating to adjust. There are "YouTube" videos on the internet that will walk you through the process of adjusting your speed control plate just Google "adjusting speed on kitchenaid mixer" I hope this helps. please let us know if it does and if you have other questions just post them here and we will "FixYa"

Are you are referring to the pivot pin that joins the mixer head to the stand?

If so, it can be slid in place after you turn the whole mixer on its side and look up the underside of the stand. There is a screw which locks the pin in place. Loosen the screw and the pin will go into place. Tighten the screw afterwards.

Sounds like a worm gear problem to me, it's impossible for the motor (armature) to move far enough to not drive the gear. There are driving pins in the system from fuse gear to paddle.
1) in the fuse gear
2) inside gearbox above planetary joining shaft to bevel gear
3) through planetary and shaft

There is also one joining the little gear inside the planetary to the shaft, doubt you'd break that one though.

The armature will not normally make a knocking noise, even on low speed it is turning at hundreds of revolutions per minute so you will only get a whirr not a knock. Most common knocking is the plastic fuse gear missing a tooth or two. That is the first gear driven directly from the end of the armature. What you should have done is break it down slowly while always keeping it together enough to run it with one component less each time. Remove planetary.....run it. Split gear case apart....run it. That sort of process will give you a clue where you need to be looking for the fault.

Something is out of balance, the front or rear bearing sounds like the culprit. the rear bearing is a relatively easy fix from the rear of the machine the front bearing is a little harder and will require a full tear down,


There is a sometimes problem that can fix a bearing problem that is actually not a bearing problem but a loose nut problem. At the rear of the mixer after you have removed the rear end cover get down to eye level with the rear of the mixer look to the right and left of the copper and black plastic speed switch plate and you will see a 3/8 nut on each side of the rearing housing, these sometimes get over tightened or come loose, you need a nut driver to operate them. tighten them up and turn on the mixer if there is a noticeable change in the pitch or sound of the mixer or the knocking gets worse turn them back the other way and listen again, if the knocking goes away then it was the nuts, it is only a sometimes fix, but it can be the problem,
if it is not the bearings i would generally start my fix by going to the gears first, The worm gear can be going and that will also take a tear down to fix but easy to do, you will need a new gasket, grease, a new worm gear and plenty of paper towels, it's messy. how long has it been thumping? how old is the machine? the worm gear fix has several really good you tube vids for this, just type in broken kitchenaid and you will get several, please let us know if this helps

I think that the motor is still fine. Get a Copy of the Repair Part List from Kitchenaid.com.
First thing I would do is to check the two Motor Brushes (one on each
side of the Motor Housing). Make sure they are not worn out, and when
inserted, they must both make contact with the Motor Coils. If even
one of them is not in contact with the coils, the motor will not run.
You can also remove the Motor Housing and visually verify that they
are touching the Coils.