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Craftsman 315.277180 Owner's Manual page 14

Adjustable variable speed - reversible double insulated 3/8 in. professional hammer drill

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CHUCK
REMOVAL
See Figures 13, 14, and 15.
The chuck must be removed in order to use some
accessories. -
To remove:
Unplug your hammer drill.
_k
WARNING:
Failure to unplug your hammer ddll
could result in accidental starting causing sedous
injury.
Line up hole in spindle with slot in gear housing
and insert a 118 in. diameter nail or pin in
spindle shaft.
Insert a 5/16 in. or larger hex key wrench (allen
wrench) into the chuck of your drill and tighten
the chuck jaws securely.
Tap the hex key sharply with a mallet in a
clockwise direction. See Figure 13. This will
loosen the screw in the chuck for easy removal.
MALLET
1/8In. DIAMETER
)R PIN
KEYLESS
CHUCK
HEXKEY
WRENCH
Fig. 13
Open chuck jaws and remove heX"key wrench.
Remove the chuck screw by turning it in a
clockwise direction. See Figure 14. Note: The
screw has left hand threads.
SCREWDRIVER
Insert hex key wrench into chuck and tighten
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. See Figure 15.
Fig. 15
Unlock spindle by removing nail or pin from slot
in gear housing.
TO RETIGHTEN
A LOOSE CHUCK
The chuck may at times 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, follow these
steps:
Unplug your hammer drill.
WARNING:
Failure to unplug your hammer drill
could result in accidental starting causing serious
injury.
Line up hole in spindle with slot in gear housing
and insert a 118 in. diameter nail or pin in
spindle shaft.
Insert hex key wrench into chuck and tighten
chuck jaws securely, Tap hex key wrench sharply
with a mallet in a clockwise direction. This will
tighten chuck on the spindle.
Open the chuck jaws and remove hex key
wrench.
Tighten the chuck screw. Note: The chuck screw
has left hand threads.
Unlock spindle by removing nail or pin from slot
in gear housing.
!
Fig. 14
14

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