Question about KitchenAid KSM90 Ultra Power Series Stand Mixer
My Kitchenaid mixer has started to leak oil. We used it yesterday to make cookies, it has not leaked before. Any suggestions??
I called KitchenAid about this issue with my mixer. The agent on the phone told me they are aware that it tends to happen to some mixers after they sit for some time. Basically, a "lifetime" of grease has been packed into the assembly and it is normal for it to release grease on occasion. I was told to run the mixer at 10 for at least 2 minutes to get it going and I should see a reduction in the oil leak. I had about a tablespoon worth of oil dripping down off the assembly. I was told that if over time it seemed to amount to about 1/4 cup then I should call to see about repairs due to a potentially bad seal. I was also told that the repair for that would most likely NOT cost the same as a new appliance.
Posted on Nov 24, 2007
I have the same problem. It is not oil, but the oil residue from the grease that surrounds the gear box. There is a very heavy grease that is wrapped around the gears. I am assuming that the leak is the broken down grease that seeped out from the gasket. Here is what I did: Remove the chrome ring(pound down on it gently, it will come off very easily) remove the pin on the shaft. Clean all the oil out of the assembly. Remove the motor cover. Remove all the screws from the large gear(about 5 of them)this will allow ou to pull the top of the mixer off. There are 2 screws holding the band around the mixer, remove them. There are 4 screws holding the top of the mixer to the bottom, remove them. You should be able to lift the top of the mixer off. Remove the black gasket, inspect it for cracks. I cleaned mine and put the same one back on. I thing all that was wrong was the screws were loose letting the grease leak out. It runs fine now. no leaks yet. You will find all the diagrams at this web site: http://www.appliancepartspros.com/partsearch/model.aspx?model_id=239812
Posted on Dec 18, 2006
Mixer's detailed solution was music to a handyman's heart!
But in starting into his fix for the first time this unit has been apart in 12 yrs., I found that KAid had intentionally designed that drip ring into the unit because it's too expensive to make a vertical shafted gearhead leakproof. When you see oil, it's simply a sign that the ring gear unit's grease, and possibly some of the upper gearcase's as well, has broken down and overflowed the drip ring, and, at least, needs to be cleaned. But I'd suggest only dismantling the bottom gearcase cover by removing the shaft pin, carefully prying off the cover, and cleaning out the entire ring gear assembly. Then thoroughly mix a grape sized qood quality grease with powdered graphite, apply to several spots in ring gear and a little on the pinion, and reassemble. This quantity is small enough that it can't ever overflow, and the graphite will keep the gears adequately lubricated. If obsessive about quantity, check the drip ring from time to time if unit is heavily used, and replenish case with a little more, depending on what you see in the ring.
The ring gear case has been designed with a sump to catch what should drop into it, but when the head is tipped for bowl removal, the sump will drain out and collect in the drip ring. The upper gearcase output shaft may also contribute "oil" by leaking into the ring gear case as well.
Posted on Apr 07, 2008
Great article. This is not difficult to disassemble. DO NOT FORCE ANYTHING and TAKE YOUR TIME. Get the spouse to help you - great for the marriage! The oil is coming out of suspension in the grease. In our mixer I found about a cup of grease in the gear case. Way too much! We cleaned most of that out, leaving enough to keep the gears coated, and put the top half back on the bottom half. We applied a waterproof grease (you can get from bike shops) on the planetary ring and gear before inserting the planetary on the shaft. I also discovered that we had all steel gears.
Posted on Aug 09, 2007
Very good video showing how to replace grease in the gearbox.
Posted on Dec 06, 2012
The oil leaks when the grease has broken down. One way to fix this is to take the mixer apart. Click on link to see how.
Clean the old grease out and google (KitchenAid mixer grease) and you'll find new grease on amazon for around $17.
Repack and it should be as good as new.
Posted on Aug 14, 2010
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Posted on Jan 02, 2017
Found this,may be helpful.
Why do I see oil leaking from the beater shaft of my stand mixer?
Some KitchenAid® stand mixers that are not used very often or have been tipped may experience slight oil leakage from the shaft or hub attachment. To avoid the oil leakage, KitchenAid suggests that you run the mixer weekly for short periods of time. Generally, the mixer may lose approximately X cup of oil before repair is necessary. The oil used is FDA approved and is not harmful to consume, should any get into the food that you are preparing.
Posted on Dec 15, 2008
First off -- if it's still under warrantee, you'll want to go to kitchenaid.com and find the nearest service center. The next thing I say starts with "void the warrantee" steps. :)
It's very simple to open a stand mixer to see if you've got a simple problem or a bad one.
Follow the aluminum "Kitchen Aid" band to the back of the unit, there's one main screw. Remove this, and set it aside with the band which should come right off at this point.
Now, there should be two screws on each side of the unit where the band used to be. Remove each of these. They're all identical, so no worries if you mix them up.
Now you can lift the top off of the unit and see inside. The motor is at the back of the unit, the gear box at the front is where the oil is coming from. Try (GENTLY) to tighten the screws that hold the gearbox together. With a little luck, the gearbox screws had come loose and it was oozing oil out through the seals. If they're all firm, then you've got more serious problems and you'll want to find a service center for it.
Posted on Aug 03, 2009
You can see that there are 5 screws holding the upper and lower gearcase together. They pinch the gasket number 26 together and prevent the oil and grease from leaking. Remove the chrome ring by prying gently around the ring. You will see the 5 screw heads. Tighten them and the leaking will stop.
If it still leaks then you may have to replace the fiber washers number 29 which will involve disassembling the lower gear case.
Posted on Mar 31, 2010
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