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OPERATION
CHUCK REMOVAL
See Figures 12, 13, and 14.
The chuck must be removed in order to use some
accessories.
To remove:
■
UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■
Close chuck jaws. Insert chuck key into chuck and
tap sharply with a mallet in a clockwise direction.
See figure 12. This will loosen chuck screw for
removal.
■
Open the chuck jaws and remove the chuck screw
by turning clockwise with a flatblade screwdriver.
See figure 13. NOTE: Chuck screw has left hand
threads.
■
Insert chuck key into chuck and tap sharply with a
mallet in a counterclockwise direction.
■
This will loosen the chuck on the spindle.
■
It can now be unscrewed by hand.
See Figure 14.
■
Remove chuck key and return to storage area.
TO RETIGHTEN A LOOSE CHUCK
The chuck may at times become loose on the spindle and
develop a wobble. Also, after several drilling operations the
chuck screw may become loose. Periodically check chuck
screw for tightness. A loose screw will cause the chuck jaws
to bind and prevent them from closing.
To tighten, follow these steps:
■
UNPLUG YOUR HAMMER DRILL.
WARNING:
Failure to unplug your hammer drill could result in
accidental starting causing serious injury.
■
Open the chuck jaws.
■
Insert chuck key into chuck and tap sharply with a
mallet in clockwise direction.
■
This will tighten the chuck on spindle.
■
Tighten chuck screw. NOTE: Chuck screw has left
hand threads.
■
Remove chuck key and return to storage area.
CHUCK KEY
MALLET
SCREWDRIVER
CHUCK
CHUCK
JAWS
CHUCK KEY
CHUCK
MALLET
Fig. 12
Fig. 13
Fig. 14
Summary of Contents for craftsman 315.101390
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