Maintenance - DeWalt DWD450 Instruction Manual

NOTE: When using hex shank or three sided shank bits be sure to align
the flat sides of the bit with the chuck jaws to ensure the bit is properly
engaged by the jaws.
REMOVAL OF KEYED CHUCK (FIG. 9)
Remove the left-handed clutch screw using a T25 torx wrench,
rotating clockwise to loosen.Tighten the chuck around the shorter
end of a hex wrench (not supplied) of 3/8" (10 mm) size. With the tool
braced securely, use a soft hammer and strike the hex wrench sharply
in the counterclockwise direction when viewed from the front of the
tool. This will loosen the chuck so that it can be removed by hand.
KEYED CHUCK INSTALLATION (FIG. 10)
Screw the chuck on by hand as far as it will go. Insert the shorter end
of a hex wrench (not supplied) of 3/8" (10 mm) size and strike it in
the clockwise direction with a soft hammer. Reinstall the left handed
clutch screw.
FIG. 9 FIG. 10
MAINTENANCE
_WARNING: To reduce the risk of injury, turn unit off
and disconnect R from power source before installing and
removing accessories, before adjusting or when making
repairs. An accidental start-up can cause injury.
Motor Brushes
DEiWALT uses an advanced brush system which automatically stops
the drill when the brushes wear out. This prevents serious damage to
the motor. New brush assemblies are available at authorized DEWALT
service centers. Always use identical replacement parts.
Lubrication
Your tool was properly lubricated before leaving the factory. In from
two to six months, depending upon use, take or send your tool to a
DEWALT Service Center or other qualified service organization for a
complete cleaning, inspection and relubrication.
Tools used constantly on production or heavy duty jobs or exposed
to heat may require more frequent lubrication. Tools "out of service"
for long periods should be relubricated before being put back into
service.
Cleaning
i_ WARNING: Blow dirt and dust out of all air vents with clean, dry air
at least once a week. To minimize the risk of eye injury, always wear
ANSI Z87.1 approved eye protection when performing this.
A WARNING: Never use solvents or other harsh chemicals for
cleaning the non-metallic parts of the tooL These chemicals may
weaken the plastic materials used in these parts. Use a cloth
dampened only with water and mild soap. Never let any liquid get
inside the tool," never immerse any part of the tool into a liquid.
Accessories
i_WARNING: Since accessories, other than those offered by
DEWALT, have not been tested with this product, use of such
accessories with this tool could be hazardous. To reduce the risk of
injury, only DEWALT recommended accessories should be used with
this product.