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17
MAINTENANCE
REMOVING THE CHUCK
See Figures 14, 15, and 16.
Follow these steps to remove the chuck.
■ Lock the trigger switch by placing the rotation selec-
tor in the center position.
■ Insert a 5/16 inch or larger hex key wrench into the
chuck of the drill and tighten the chuck jaws securely.
■ Tap the hex key wrench 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
wrench.
■ Remove the chuck screw by turning it in a clockwise
direction.
Note: The screw has left-handed threads.
■ Insert the hex key wrench in the chuck and tighten
the chuck jaws securely.
■ Tap sharply with a mallet in a counterclockwise
direction. This will loosen chuck on the spindle. It can
now be unscrewed by hand.
TIGHTENING THE CHUCK
See Figures 14 and 15.
The chuck may become loose on the spindle and begin to
shake when using the drill. Also, the chuck screw may
become loose causing the chuck jaws to bind and prevent
them from closing.
Follow these steps to tighten the chuck.
■ Lock the trigger switch by placing the rotation selec-
tor in center position.
■ Open the chuck jaws.
■ Insert the hex key wrench into the chuck and tighten
the chuck jaws securely.
■ Tap the hex key wrench sharply with a mallet in a
clockwise direction. This will tighten chuck on the
spindle.
■ Open the chuck jaws and remove the hex key
wrench.
■ Tighten the chuck screw.
Note: The chuck screw has left-handed threads.
20
5
Fig. 15
20
5
Fig. 16
HEX KEY
20
5
CHUCK JAWS
KEYLESS
CHUCK
MALLET
Fig. 14
SCREWDRIVER