After removing the screw and inserting the allen wrench shift the drill to the LOW position and turn the clutch to the drill only position. Use an allen wrench about the size of the chuck capacity so that it will not flex when hitting it with a mallet. Sometimes they are stubborn because of the torque but this should work. Put the allen wrench at about a 30deg angle and hit the wrench. I support the chuck on a workbench or a block of wood will do fine. The chuck has standard threads.
Open the chuck fully and remove the scre inside by turning clockwise. insert allen short side in to the chuck & tighten the chuck. hold the drill & hit the allen counter clockwise & do it again as needed.
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After removing the screw and inserting the allen wrench shift the drill to the LOW position and turn the clutch to the drill only position. Use an allen wrench about the size of the chuck capacity so that it will not flex when hitting it with a mallet. Sometimes they are stubborn because of the torque but this should work. Put the allen wrench at about a 30deg angle and hit the wrench. I support the chuck on a workbench or a block of wood will do fine. The chuck has standard threads.
Open the chuck fully and remove the scre inside by turning clockwise. insert allen short side in to the chuck & tighten
the chuck. hold the drill & hit the allen counter clockwise & do it again as needed.