MAINTENANCE
REMOVING THE CHUCK
See Figures 12, 13, and 14.
Follow these directions to remove the chuck.
■Unplug the hammer drill.
WARNING:
Failure to unplug the tool could result in accidental starting causing possible serious injury.
■Open the chuck jaws by turning the chuck collar counterclockwise.
■Insert a 5/16 in. (7.9 mm) or larger hex key into the chuck.
■Tighten the chuck jaws using the chuck key pro- vided.
■Loosen the chuck screw by tapping the hex key sharply with a mallet in a clockwise direction.
■Open the chuck jaws and remove the hex key.
■Remove the chuck screw by turning it in a clockwise direction with a screwdriver.
NOTE: The screw has left hand threads.
■Reinsert the hex key into the chuck.
■Tighten the chuck jaws securely using the chuck key provided.
■Loosen the chuck by tapping the hex key sharply with a mallet in a counterclockwise direction.
■Unscrew the chuck by hand.
TIGHTENING THE CHUCK
See Figures 12 and 13.
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 directions to tighten the chuck.
■Unplug the hammer drill.
WARNING:
Failure to unplug the tool could result in accidental starting causing possible serious injury.
■Open the chuck jaws by turning the chuck collar counterclockwise.
■Insert a 5/16 in. (7.9 mm) or larger hex key into the chuck.
■Tighten the chuck jaws using the chuck key pro- vided.
■Tap the hex key sharply with a mallet in a clockwise direction to tighten the chuck on the spindle.
MALLET
CHUCK
JAWS
CHUCK
HEX KEY
Fig. 12
SCREWDRIVER
Fig. 13
MALLET
HEX KEY
CHUCK JAWS | CHUCK |
Fig. 14
■Open the chuck jaws and remove the hex key.
■Tighten the chuck screw by turning it in a counter- clockwise direction with a screwdriver.
NOTE: The screw has left hand threads.
14
