Today I have for you a tough as nails American ASL40N Government solid brass padlock gutted, and with a simple mod.
Here's a couple shots of the lock before surgery.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_132512_zpsok8p0lvq.jpg~original
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_132711_zpsantmv24l.jpg~original
This nasty bottom we're going to do away with, plus the keyway profile.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_132725_zpswo2dpilf.jpg~original
Bam, key works.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_132822_zpsuappdvjl.jpg~original
And of course since the lock is non rekeyable, we have not a screw or an allen bit, but a rivet (for now)
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_132835_zpsfo3pqnpo.jpg~original
A quick removal of the rivet. To do so I alternated between drilling and using a tap. After about 5 minutes, it came free.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_135527_zps6ltu9qb2.jpg~original
Some guts action. Exactly what I would expect from older American locks.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_140123_zpsfgtfala1.jpg~original
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_140309_zpsgbcmekta.jpg~original
Replacing the bottom thing ( I'm honestly not sure what it's called), screw and retaining piece thing (once again, not sure what it's called) with some left in my spare parts pile from my 5200's graveyard. The big difference in parts here is that the piece the screw goes into on the 5200 has little wings to keep it from spinning. The ASL40N was free to spin, making drilling interesting.
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_141844_zps5xhk6cnu.jpg~original
Key still works, and now it's rekeyable for even more possibilities!
http://i1383.photobucket.com/albums/ah291/comradehotsauce/20150221_141902_zpszm7fnmli.jpg~original