Craftsman 315.119100 Operation Manual - Page 15

CHUCK REMOVAL See Figures 13- 15, The chuck may be removed and replaced by a new one. [] Lock the switch trigger by placing the direction of rotation selector in center position. [] Insert a 5/16 in. or larger hex key into the chuck of the drill and tighten the chuck jaws securely. [] Tap the hex key sharply with a mallet in a clockwise direction. This will loosen the screw in the chuck for easy removal. [] Open the chuck jaws and remove the hex key. [] Using a screwdriver, remove the chuck screw by turning it in a clockwise direction. NOTE: The chuck screw has left hand threads. [] Insert the hex key into the chuck and tighten the chuck jaws securely. Tap sharply with a mallet in a counterclockwise direction. This will loosen the chuck on the spindle. It can now be unscrewed by hand. TO RETIGHTEN A LOOSE CHUCK The chuck may become loose on the spindle and develop a wobble. Also, the chuck screw may become loose, causing the chuck jaws to bind and prevent them from closing. To tighten: [] Lock the switch trigger by placing the direction of rotation selector in the center position. [] Open the chuck jaws. [] Insert the hex key into the chuck and tighten the chuck jaws securely. Tap the hex key sharply with a mallet in a clockwise direction. This will tighten the chuck on the spindle. [] Open the chuck jaws and remove the hex key. [] Using a screwdriver, tighten the chuck screw by turning in a counterclockwise direction. CHUCKJAWS REX KEY SCREWDRIVER MALLET Fig. 13 Fig. 14 MALLET REX KEY 15 Fig. 15