Craftsman 315.101531 Operator's Manual page 14

CHUCK REMOVAL
See Figures 9, 10, and 11.
The chuck must be removed in order to use some
accessories. To remove:
• Lock the switch trigger by placing the direction of
rotation selector in center position. See Figure 2.
• 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. See Figure 9. This will loosen the screw in
the chuck for easy removal.
MALLET
CHUCKJAWS
KEYLESS
CHUCK
• Insert the hex key in chuck and tighten the chuck jaws
securely. Tap sharply with a mallet in a counterclock-
wise direction. This will loosen the chuck on the spindle.
It can now be unscrewed by hand. See Figure 11.
MALLET
HEXKEY
Fig. 9
• Open the chuck jaws and remove the hex key. Remove
the chuck screw by turning it in a clockwise direction.
See Figure 10.
Note: The screw has left hand threads.
SCREWDRIVER
Fig. 11
TO RETIGHTEN A LOOSE CHUCK
The chuck may become loose on the spindle and develop
a wobble. Periodically check the chuck screw for tight-
ness.
To tighten, follow these steps:
• Lock the switch trigger by placing the direction of
rotation selector in center position. See Figure 2.
• 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.
• Tighten the chuck screw.
Note: The chuck screw has left hand threads.
Fig. 10
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