Craftsman 973.220490 Operator's Manual page 15

CHUCK REMOVAL
See Figures 19, 20, and 21.
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 11.
Insert a 5/16 inch or larger hex key wrench into the
chuck of your drill and tighten the chuck jaws securely.
Tap the hex key wrench sharply with a mallet in a
clockwise direction. See Figure 19. This will loosen
the screw in the chuck for easy removal.
CHUCK JAWS
HEX KEY
WRENCH
Open chuck jaws and remove hex key wrench.
Remove the chuck screw by turning it in a clockwise
direction. See Figure 20.
Note: The screw has left hand threads.
SCREWDRIVER
OPERATION
MALLET
KEYLESS
CHUCK
Fig. 19
Fig. 20
Insert hex key wrench in chuck and tighten chuck
jaws securely. Tap sharply with a mallet in a counter-
clockwise direction. This will loosen chuck on the
spindle. It can now be unscrewed by hand.
See Figure 21.
TO RETIGHTEN A LOOSE CHUCK
The chuck may become loose on spindle and develop a
wobble. Periodically check chuck screw for tightness. A
loose chuck screw may cause the chuck jaws to bind and
prevent them from closing.
To tighten, follow these steps:
Lock the switch trigger by placing the direction of
rotation selector in center position. See Figure 11.
Open the chuck jaws.
Insert hex key wrench into chuck and tighten chuck
jaws securely. Tap hex key wrench sharply with a
mallet in a clockwise direction. This will tighten chuck
on the spindle.
Open the chuck jaws and remove hex key wrench.
Tighten the chuck screw.
Note: The chuck screw has left hand threads.
15
Fig. 21