This diagram shows a Remington Rand KMC that may be a bit older than mine – note the glass top keys
Many, many thanks to Richard Polt of The Classic Typewriter Page and The Typewriter Revolution blog for allowing me to post this parts diagram. I found it in his great listing of typewriter user’s manuals and service manuals on his Classic Typewriter Page site.
Knowing specific part names helped me research basic operation of our typewriter.
myoldtypewriter 
Want to know maintenance on this brand. I want to use to write my life story on this
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Though not Remington Rand KMC-specific, I recommend Richard Polt’s Classic Typewriter Page or his very good book, The Typewriter Revolution. It is packed with practical tips on how to take care of your typewriter.
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there seems to be a broken belt in my kmc remington rand 1939 typewriter. i don’t see it on the parts diagram. can someone help find a replacement? thanks.
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Hi Steven, I had a broken drawband on my KMC that I repaired with fishing line:
https://myoldtypewriter.com/2015/03/12/broken-drawband-repair-on-a-1948-remington-rand-kmc-using-fishing-line/
You can use fishing line or strong upholstery twine or thin flat webbing to replace your broken drawband. I’ve even used shoelaces!
Here is a video from Phoenix Typewriter of a drawband repair on a 1959 Remington standard (fairly similar to your KMC) that shows a good technique for replacement:
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