You have to dissassemble it to remove crane lock and crane to disassemble the cylinder.
Hard to reassemble though.......
This is off the old DW website:
DISASSEMBLY, REASSEMBLY INSTRUCTIONS FOR DAN WESSON DESIGN LARGE AND SUPERMAG FRAME SERIES REVOLVERS
MAKE SURE REVOLVER IS UNLOADED
REMOVE GRIP SCREW AND GRIP
REMOVE MAINSPRING GUIDE RETAINING SCREW
COCK HAMMER AND INSERT MAINSPRING GUIDE RETAINING SCREW INTO BOTTOM OF MAINSPRING GUIDE AND THREAD IN 2-3 COMPLETE TURNS TO RETAIN MAINSPRING TENSION
RELAX HAMMER
USE DRIFT PUNCH TO TAP OUT HAMMER/TRIGGER PIN FROM EITHER SIDE OF THE RECEIVER
USE PUNCH OR SCREWDRIVER TO DEPRESS TRIGGER GUARD LATCH
PULL BACK ON TRIGGER AND REMOVE TRIGGER ASSEMBLY DOWNWARD
REMOVE HAMMER UPWARD
USE 1/16" DRIFT PUNCH TO REMOVE STRUT RETAINING PIN
REMOVE STRUT, STRUT PLUNGER AND STRUT SPRING
REINSTALL HAMMER MAKING SURE THAT IT IS PROPERLY SEATED IN THE MAINSPRING
COCK HAMMER
POSITION TRIGGER ASSEMBLY BACK INTO BOTTOM OF RECEIVER MAKING SURE THAT THE CONNECTOR AND HAND ARE IN FRONT OF THE HAMMER
PULL TRIGGER TO "FIRE" POSITION AND PRESS TRIGGER ASSEMBLY UPWARDS AS FAR AS IT WILL GO
RELAX TRIGGER
DEPRESS TRIGGER GUARD LATCH AND PUSH TRIGGER ASSEMBLY UPWARDS TO ORIGINAL POSITION
RELAX TRIGGER GUARD LATCH ALLOWING IT TO GO INTO POSITION IN THE RECEIVER
ALIGN HAMMER HOLE WITH HAMMER/TRIGGER PIN HOLE IN RECEIVER AND REINSERT HAMMER/TRIGGER PIN
COCK HAMMER
REMOVE MAINSPRING GUIDE RETAINING SCREW FROM BOTTOM OF MAINSPRING GUIDE AND RETURN TO ITS ORIGINAL POSITION
http://www.gunsworld.com/exploded/dan44.htm