Maintenance - Craftsman 315.119100 Operator's Manual

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 rota-
tion 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 turn-
ing 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 counter-
clockwise 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 rota-
tion 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 turn-
ing in a counterclockwise direction.

MAINTENANCE

CHUCK jAWS
SCREWDRIVER
15
mALLET
HEX KEY
HEX KEY
KEYLESS
CHUCK
Fig. 13
Fig. 14
mALLET
Fig. 15