Craftsman 315.115510 - Manual (Page 17)

MAINTENANCE
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
rotation 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.
MALLET
HEX KEY
Fig. 13
Open the chuck jaws and remove the hex key. Using a
screwdriver, remove the chuck screw by turning it in a
clockwise direction,
NOTE: The chuck screw has left hand threads.
SCREWDRIVER
HEX KEY
Fig. 15
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
rotation 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.
■ Tighten the chuck screw.
Fig. 14
Insert the hex key into the chuck and tighten the
chuck jaws securely. Tap sharply with a mallet in a
counterclockwise direction. This will loosen the chuck
on the spindle. It can now be unscrewed by hand.
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