Disassemble sunbeam model 100-86659 - Sunbeam Kitchen Appliances - Others

You don't, you just throw it out and buy a new one. They aren't made to be taken apart and this is the sum total of 'spares'!

https://spares.bigwarehouse.com.au/index.php?cPath=81834_84179_90569

No one has ever taken one apart.

https://www.google.com/search?q=SUNBEAM+STICK+MIXER+MODEL+SM6200+TYPE+737+disassembly

Inside is all you will find is an overclocked direct drive electric motor.
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Question edited for clarity.
Question moved from Sunbeam Cars

There are no instructions on disassembly because it is so old. There will be screws underneath. Oil will be grease that is degrading.

https://www.google.com/search?q=sunbeam+oskar+4816-8+disassembly

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Service manual, but this isn't a motor issue, it is a speed controller issue. It has a PCB board.

https://www.manualslib.com/manual/1117962/Sunbeam-Mx8900.html#manual

http://spares.bigwarehouse.com.au/common_faults.php?cPath=81834_84061_84067

Disassembly will probably be similar to the EM-3 here

https://www.google.com/search?q=sunbeam+mixmaster+mx8900+disassembly

Or return it to Sunbeam under a warranty claim.
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This is not something I would attempt as a consumer. To properly oil this model requires disassembly. Take it to a reputable repair shop.

This is not something I would try as a consumer. Proper oiling requires disassembly. Take it to a reputable repair shop.

try the following sites
www.eserviceinfo.com/equipment_type/model###
www.freeproductmanual.com/manufactures_name/model###
www.info.com/manuals
www.s-manuals.com/manufactures_name/model###

at the browser type the following information
sunbeam disassemble procedures for make/model ###

you could look at www.youtube.com/disassembling mixmaster model 2351

To disassemble a sunbeam mixmaster 2370, find four plastic snappers arranged at 1, 5, 7 and 11 o'clock around the front circle of vents. They can be seen with the help of a good flashlight. un-snap them and the top and bottom shells will separate. From there on, it is clips and screws. Good luck!

Yes, you do have to remove the knob.
you can see a step by step disassembly, with pictures, here:
http://www.lahabraheights.net/SunbeamCG_WaffleMaker/SunbeamCG_Disassemble.html