This article is from the Locksmithing FAQ, by Joe "Spike" Ilacqua spike@indra.com and Henry Schaffer hes@ncsu.edu, major data collection effort by Scott Anguish sanguish@digifix.com with numerous contributions by others.
0) Open the door. (If you can't, call a locksmith!)
1) Dismount outer knob from door (the screws are on the indoor side.)
2) Depress spring retainer and remove spindle.
3) Reach in through spindle opening and gently release spring.
retainers by pushing towards center. This can be done -- VERY
awkwardly -- with a pair of narrow screwdrivers. Or you can get a
Kwikset Removal Tool (inexpensive), which is just a short piece of
sheet steel of the correct width with a "U" chomped into the end.
The points of the U engage the tips of the retainers and move them
automagically. (see drawing and measurements below)
4) Cylinder will pop out of knob. Rekey normally.
5) When done, snap everything back together and reinstall.
Kwikset cylinder removal tool - cut from a piece of metal
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