Mixer squeals.... where should I be looking first to solve the problem. Is it just a lubrication issue of something major? Where can I find manuals or diagrams to fix it? Thanks for the help in advance.

They are lubricated with food grade grease, not oil. Any oil dripping out is coming out of the grease as the grease gets older and starts separating liquids from solids.

Right off, it sound's like a lubrication issue. Get the Service Manual at:
http://www.kitchenaidparts.eu/documents/pdf/service-manual/classic-svc-manual-new-email-version.pdf

Go on line and Google manuals

If it slows down when mixing, it is most likely that the mixer is being asked to do more than it is capable of. If it slows down when nothing is in the bowl, then the motor/gears/lubrication needs looking after.

The Service Manual is at:

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

the speed control on my kenwood chef A901 is not working
how do i fix this.

I came across a manual for a Blakeslee f-40 60 80 and here is what it said. Hope this helps

Lubrication
The planetary and spiral-beveled gears are self-lubricated for life. The lubrication used is micromly grease and must be re-applied if gears are replaced. The transmission uses Mobil "delvic 1" synthetic oil which should last the normal life of the mixer. No lubrication is required for the auxiliary drive hub.
If lubrication is applied to the auxiliary hub a grease-like substance will possibly leak out causing damage to the product.
Applications of any lubrication will Void Warranty.

berkelsalesservice.com/PDFs/DD-40_60_80.pdf

Hi CONTACT_TOS. I’m not sure what removable cap you are referring to, unless you are referring to the two plastic caps with screwdriver indents on opposites sides of the head? Do not remove them. Those are Brush Holder Caps for access to the electric motor brushes. You do not want to remove them unless you are replacing the brushes.
Why do you want to add lubrication to your mixer? The internal gears of your mixer are factory packed with enough grease to last a 'lifetime'. Unless your mixer is quite old; greater than 10 years, you shouldn’t have to replace any transmission lubricant. Your mixer’s transmission lubricant (grease) does break down over time and usage into its components; basically oil and suspension additives, and sometimes your mixer might leak a little oil that has seeped beyond the transmission gasket and found its way out of the mixer. Gravity can be very insidious. But even then, if the amount of oil you find leaking is small and your mixer seems to be operating normally, you needn’t worry about the replacing the lost lubricant.
If you still wish to check or replace the lubricant, that’s OK, too. It never hurts to get under the ‘hood’ of your mixer and see how it all works. Before you get started though, it would be helpful to have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website at: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> and select “Consumer” for User Type, then enter the 6 character Model Number, in your case use KSM50P (Your K5SS mixer falls within this manual), and select the first file KSM50P.pdf (438.31 KB) listed under Parts List (4). (Check to verify this matches your mixer model.)
Turn to pages 4 & 5 titled: “Case, Gearing & Planetary Unit,” for the disassembly, troubleshooting, and reassembly of your mixer’s transmission gears, along with all the parts. It can get quite messy but be gratifying to diagnose and repair your mixer yourself.
Once apart you can check for any unseemly wear and tear on the gears, etc. You may also want to consider replacing all the grease, particularly if debris is suspended in it.
Besides any replacement grease you might consider replacing the gasket (Illus. No. 26), too. I recommend using a food-grade grease that you can order online (although I’ve seen automotive bearing grease used too – your call).
Here are some links to several excellent websites that detail the disassembling/greasing and reassembly of a KA Mixer. The mixers displayed in the links are different KA models, but the principles are the same.

• http://www.artisanbreadbaking.com/discussions/kitchen-aid.htm
• http://www.neilcrockett.com/mixer.htm
• http://www.foodonthefood.com/food_on_the_food/2009/04/how-to-repair-a-kitchenaid-mixer-yourself.html

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer along with replacing the lubricant if you wish to.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution has helped you, please rate it. – hslincoln

Hi . Chevron FM ALC EP-2 grease is what you need for the lubricant. This has a Mineral Oil base, allowing for it to, at some time, drip into whatever it is that you mix without concern for your health. From what I can, tell this is the only thing that needs to be done. Clean out as much of the old grease as possible.

Goto www.mendingshed.com and download for free a Kitchenaid Service Manual that will cover your mixer.

If this solution has assisted you, please rate it. Good luck! ricardok45

Hi. Your mixer needs to be serviced, have old grease and oil removed, parts cleaned, then re assembled with new grease. Remove the tapered-pin from the planetary gear, remove planetary gear, clean lubricate and re install. Chevron FM ALC EP-2 is a "Food Grade" lubricant, meaning that it's safe for human consumption if it accidentally gets into food. There are no seals, only bushings. The existing bushings will hold back the new grease. The oil has separated from the base of the grease. If you don't use your mixer very often, start it up about once a week to keep the grease properly mixed.

If you'd like more info on your mixer goto kitchenaid.com, look up your model # download the PARTS drawings. Use these drawings to re-assemble and to determine if you need any replacement parts. Be prepared to wait at least a month for your parts to arrive.

If this Solution assisted you, please rate it. ricardok45

Have recently inherited an old Kenwood Major A707A with same problem, contacted local electrical repair man, experienced with Kenwood mixers. He is fitting a new clutch, will cost about £30. I think its worth it. Anyone out there know where I can get Instruction Manual ?