Chuck Removal - Craftsman 10137 - 1/2 in. Corded Hammer Drill Operator's Manual

CHUCK REMOVAL
See Figures 9 - 11.
The chuck can be removed and replaced with a new one.
[] Unplug the drill.
[] 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
[]
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.
LLET
[]
CHUCK
HEXKEY <
Fig. 9
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.
HEX KEY
Fig. 11
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:
[] Unplug the drill.
[] Open the chuck jaws.
[] Insert a hex key into the chuck and tighten 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. 10
15