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My KitchenAid mixer is leaking oil from the spindle the beaters attach to.

Customer
My kitchen aid mixer is leaking oil from the spindle the attachments attach to. Is there someone in my area could check out this problem?
Support
I will need the model number of your mixer. The model number can be found under the base of the mixer on a label. You will need to tip your mixer on its side to see it.
Customer
I found two numbers PHB 14138-5 and 240151. No label found, these were engraved on the bottom of the mixer.
Support
Neither of those will be the model number. Lets try a different way to identify the mixer. Is it a tilt head style mixer, where the bowl twist and locks into the base of the mixer? Or is it the style where the bowl lifts up and down toward the head of the mixer?
Customer
The first one you described. On the Warranty card, I did not mail in, has a number of GWN01-01.
Support
To be sure this is a KitchenAid stand mixer, correct?
Customer
Yes
Support
Ok, so you said it is leaking oil, the spindle you are refering to is it where the beaters attach, or the attachements like the food grinder or pasta makers attach?
Customer
Where the beaters attach.
There was a puddle of oil on the bowl base this morning from overnight.
Support
Ok, so you have either a 4.5 or 5 quart tilt head mixer, both of those take the same parts. What you need to do is replace the grease inside the mixer, and also the gearbox gasket should be replaced. Basically KitchenAid uses a vegetable based grease, which over time can break down, and turn into an oil which leaks from the mixer. The grease is normally a very thick substance, and usually lasts several years.

We have a full service manual which will assist you in taking the mixer apart, cleaning out all the grease and replacing it with new grease.

And here is a link to the special grease KitchenAid recommends:

The grease only comes in a 30 ounce can, which is enough to service 4-5 mixers
Customer
Thanks for your help.
Support
Oh, and also here is a link to the gasket you need to replace