Kenmore ice maker new the arm don't drop after ice is made gets stuck on the up position I push down slightly falls then starts again, and gets stuck again in same spot.

You have a problem with a microswitch in the ice maker. Here is a manual: https://dl.dropbox.com/u/8010163/R-1...e%20Manual.pdf
https://dl.dropbox.com/u/8010163/Whi...e%20Manual.pdf
Test the microswitches in that icemaker and replace the one that is bad.