DeWalt DWH303DH User manual

ENGLISH
1
English (original instructions)
Definitions: Safety Alert Symbols and Words
This instruction manual uses the following safety alert symbols and words to alert you to hazardous situations and your risk
of personal injury or property damage.
DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or seriousinjury.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or seriousinjury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderateinjury.
(Used without word) Indicates a safety related message.
NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in propertydamage.
WARNING! Read all safety warnings and all
instructions. Failure to follow the warnings and
instructions may result in electric shock, fire and/or
seriousinjury.
WARNING: To reduce the risk of injury, read the
instructionmanual.
If you have any questions or comments about this or
any
DeWALT
tool, call us toll free at:
1-800-4-
DeWALT
(1-800-433-9258).
1 Dust extraction system
2 Base release buttons
3 Dust collection box
4 Dust collection box
release buttons
5 Telescope
6 Depth adjustment
button
7 Length adjustment
button
8 Dust extraction head
9 Dust brush
10 Side handle
11 Side handle support
groove
12 Filter cleaning
mechanism
Fig. A
24
6
5
7
1
8
9
11 10
3
8
12

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IMPORTANT SAFETY
INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE
USING THIS DUST EXTRACTOR
WARNING:To reduce the risk of fire,
electric shock, or injury:
• DO NOT allow to be used as a toy. Close attention
is necessary when used by or nearchildren.
• USE ONLY as described in this manual. Use only
manufacturer’s recommendedattachments.
• DO NOT use with damaged cord or plug. If
appliance is not working as it should, has been
dropped, damaged, left outdoors, or dropped into
water, return it to a servicecenter.
• DO NOT handle plug or appliance with
wethands.
• DO NOT put any object into openings. Do not use
with any opening blocked; keep free of dust, lint,
hair, and anything that may reduce airflow.
• KEEP hair, loose clothing, fingers, and all parts of
body away from openings and movingparts.
• TURN OFF all controls beforeunplugging.
• USE EXTRA CARE when cleaning onstairs.
• DO NOT use to pick up flammable or combustible
liquids, such as gasoline, or use in areas where
they may bepresent.
• DO NOT pick up anything that is burning
or smoking, such as cigarettes, matches, or
hotashes.
• DO NOT use without dust bag and/or filters
inplace.
SAVE THESE INSTRUCTIONS
Personal Safety
a ) Prevent unintentional starting. Ensure the switch
is in the off-position before connecting to battery
pack, picking up or carrying the appliance.
Carrying the appliance with your finger on the switch
or energizing appliance that have the switch on
invitesaccidents.
b ) Disconnect the battery pack from the appliance
before making any adjustments, changing
accessories, or storing appliance. Such preventive
safety measures reduce the risk of starting the
applianceaccidentally.
c ) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used
with another batterypack.
d ) Use appliances only with specifically designated
battery packs. Use of any other battery packs may
create a risk of injury andfire.
e ) When battery pack is not in use, keep it away
from other metal objects, like paper clips, coins,
keys, nails, screws or other small metal objects,
that can make a connection from one terminal to
another. Shorting the battery terminals together may
cause burns or afire.
f ) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the battery may cause
irritation or burns.
g ) Do not use a battery pack or appliance that
is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior resulting
in fire, explosion or risk ofinjury.
h ) Do not expose a battery pack or appliance to
fire or excessive temperature. Exposure to fire
or temperature above 265°F (130°C) may cause
explosion.
i ) Follow all charging instructions and do not
charge the battery pack or appliance outside
of the temperature range specified in the
instructions. Charging improperly or at temperatures
outside of the specified range may damage the
battery and increase the risk offire.
Additional Safety Information
WARNING: ALWAYS use safety glasses. Everyday
eyeglasses are NOT safety glasses. Also use face or
dust mask if cutting operation is dusty. ALWAYS WEAR
CERTIFIED SAFETYEQUIPMENT:
• ANSI Z87.1 eye protection (CAN/CSA Z94.3),
• ANSI S12.6 (S3.19) hearing protection,
• NIOSH/OSHA/MSHA respiratoryprotection.
WARNING: Some dust created by power sanding,
sawing, grinding, drilling, and other construction
activities contains chemicals known to the State
of California to cause cancer, birth defects or
other reproductive harm. Some examples of these
chemicalsare:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other
masonry products, and
• arsenic and chromium from chemically-
treatedlumber.
Your risk from these exposures varies, depending on how
often you do this type of work. To reduce your exposure to
these chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are
specially designed to filter out microscopicparticles.
• Avoid prolonged contact with dust from power
sanding, sawing, grinding, drilling, and other
construction activities. Wear protective clothing and
wash exposed areas with soap and water. Allowing
dust to get into your mouth, eyes, or lay on the skin may
promote absorption of harmfulchemicals.

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• Do not use without dustbox and/or filter inplace.
• Do not use the appliance to pick up flammable or
combustible liquids, such as gasoline, or use in areas
where flammable or combustible liquids arepresent.
• Do not pick up anything that is burning or smoking,
such as cigarettes, matches or hotashes.
• To avoid spontaneous combustion, empty dust box
after eachuse.
• Do not leave dust extractor unattended when
battery is installed. Remove battery pack when not in
use and beforeservicing.
• Do not put any objects into the openings. Do not use
with any opening blocked; keep free of dust, lint, hair and
anything else that may reduce airflow.
WARNING: Use of this tool can generate and/
or disburse dust, which may cause serious and
permanent respiratory or other injury. Although the
filter material removes 99.97% of airborne particles
0.3 microns or greater, the dust extration system
may not capture all of the dust created by the drilling
operation. Always use NIOSH/OSHA approved
respiratory protection appropriate for the dust
exposure. Direct particles away from face andbody.
WARNING: Always wear proper personal hearing
protection that conforms to ANSI S12.6 (S3.19)
during use. Under some conditions and duration
of use, noise from this product may contribute to
hearingloss.
CAUTION: When not in use, place tool on its side
on a stable surface where it will not cause a
tripping or falling hazard. Some tools with large
battery packs will stand upright on the battery pack
but may be easily knockedover.
• Air vents often cover moving parts and should be
avoided. Loose clothes, jewelry or long hair can be
caught in movingparts.
SAVE THESE INSTRUCTIONS FOR
FUTURE USE
COMPONENTS (FIG. A)
WARNING: Never modify the power tool or any part
of it. Damage or personal injury couldresult.
Refer to Figure A at the beginning of this manual for a
complete list ofcomponents.
INTENDED USE
Your dust extraction system DWH303DH has been designed
for the extraction of dust in professional hammerdrilling
in masonry or concrete, and with solid drill bits mounted
to the power tool. DO NOT use for drilling plastic, wood or
metal. DO NOT use with hollow bits or corebits.
This dust extraction system will fit
DeWALT
20V Max cordless
SDS Plus hammers DCH273 andDCH274.
DO NOT use under wet conditions or in presence of
flammable liquids orgases.
The dust extraction system is an attachment for use with
professional powertools.
DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
thistool.
SPECIFICATIONS
Max Drilling Depth 4" (100 mm)
Max Drill Bit Length 6" (150 mm)
Max Drilling Diameter 5/8" (16 mm)
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of serious personal
injury, turn off tool and disconnect the tool
from the power source before making any
adjustments or removing/installing attachments
or accessories. An accidental start-up can
causeinjury.
Attaching and Removing the Dust
Extraction System
To Attach the Dust Extraction System
(Fig. A–C)
WARNING: To reduce the risk of personal injury,
ALWAYS operate the tool with the side handle
properly installed and securely tightened. Failure
to do so may result in the side handle slipping during
tool operation and subsequent loss of control. Hold
tool with both hands to maximizecontrol.
1. Remove the drill bit, side handle and the depth
adjustment rod, if attached to the rotaryhammer.
2. Attach supplied side handle 10 to thehammer.
3. Ensure the base release buttons 2 are depressed and
locked in the open position before attempting to fit the
dust extraction system to the rotaryhammer.
4. Insert hammer into the extractor, ensuring that both the
electrical connectors 13 14 and side handle support
groove 11 and locator 17 align. The base released
buttons will click into the closed position when hammer
is properly seated in theextractor.
Fig. B
11
17
2
3

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Fig. C
13
14
5. Test to see if the dust extractor is properly installed on
the rotary hammer:
a. Install the dustextractor.
b. Start your drilling operation and stop after 1/4"
(6mm).
c. Lift the tool and check if the dust extraction is
working. There should be nodebris.
d. If the dust extractor is operating properly continue
yourwork.
To Remove the Dust Extraction System
(Fig. B)
To remove the dust extraction system, press the two
extractor base release buttons 2 and lift the rotary hammer
off the duct extractionsystem.
The side handle must be removed to store the dust
extractor properly in thekitbox.
OPERATION
WARNING: To reduce the risk of serious personal
injury, turn off tool and disconnect the tool
from the power source before making any
adjustments or removing/installing attachments
or accessories. An accidental start-up can
causeinjury.
WARNING: For your own safety, read the tool
instruction manual before using any accessory.
Failure to heed these warnings may result in personal
injury and serious damage to the tool and the
accessory. When servicing this tool, use only identical
replacementparts.
WARNING: Do not use the tool without the filter
inplace.
Proper Hand Position (Fig. D)
WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.
WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a
suddenreaction.
Proper hand position requires one hand on the main handle
of the hammer and one hand on the side handle. The side
handle must be installed for properuse.
Fig. D
Switch
The extraction system automatically starts when the rotary
hammer is turnedon.
Filter Cleaning Mechanism
The filter cleaning mechanism is a feature that uses the
motor in the rotary hammer to force air through the HEPA
filter. Refer to Emptying the Dust Collection Box for
instructions on properuse.
Electronic Switch-off Delay
After turning the rotary hammer off, the extraction system
will run for a few seconds longer to vacuum the remaining
dust particles in the internal parts and collect the dust in the
dust collectionbox.
Setting the Drilling Depth (Fig. A)
Press the depth adjustment button 6 on top of the front
slider and move it to the desired drilling depth. Release
thebutton.
Adjusting the Drill Length (Fig. A)
1. Insert the appropriate drill bit. The dust extractor head is
designed for bits up to 1" (25.4 mm)diameter.
2. Hold the dust extraction head 8 against awall.
3. Push the tool to make the drill bit touch thesurface.
4. Press the length adjustment button 7 on top of the
back slider and move it to the desired length. Release
thebutton.
5. Gently withdraw the tool assembly from the wall,
taking care that the spring-loaded mechanism does
notrelease.
Emptying the Dust Collection Box
(Fig. A, E, F)
WARNING:ALWAYS use eye protection (CAN/
CSA Z94.3).All users and bystanders must wear eye
protection that conforms to ANSI Z87.1.
WARNING: ALWAYS use proper NIOSH/OSHA/
MSHA respiratory protection when performing
thisprocedure.
CAUTION: Do not clean with water or compressedair.
The dust collection box 3 should be emptied as soon as the
performance has noticeably decreased or isfull.

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1. Press the dust collection box release buttons4
and pull the dust collection box away from the dust
extraction system. Once the catch mechanism is clear
of the dust extraction system the upper joint will
also release allowing the dust collection box to be
removedcompletely.
2. To empty the dust collection box 3 position it over a
suitable container to catch the dust contained within
it. Lift up the assembly release latch16 to open the
dust collection box, separating the canister from the lid.
Gently tapping the dust collection box will encourage
any dust trapped within the filter to also be removed.
Once the filter lid and canister are empty reattach them,
ensuring the assembly release latch 16 is securely
fastened. Refer to FigureE.
3. To reattach the dust collection box to the dust
extraction system first insert the rounded profile of
the upper joint into the recess on the dust extraction
system. Pivot the dust collection box down so that the
release buttons click back into place. Refer to FigureE.
4. With the dust collection box properly installed, depress
the filter cleaning mechanism 12 and squeeze
trigger on tool. Allow the system to run for 5 seconds
and release trigger. This should be done after every
emptying of the dust collectionbox.
Fig. E
4
12
4
16
Fig. F
MAINTENANCE
WARNING: To reduce the risk of serious personal
injury, turn off tool and disconnect the tool
from the power source before making any
adjustments or removing/installing attachments
or accessories. An accidental start-up can
causeinjury.
Your dust collector has been designed to operate over
a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends on
proper tool care and regular cleaning. Empty the dust
extractor periodically or when the performance has
noticeablydecreased.
Replacing the Dust Collection Box Filter
Assembly (Fig. A, E)
WARNING: Wear approved eye protection and
approved dust mask when performing thisprocedure.
NOTE: The filter should be replaced after every 350 cycles
ofuse.
1. Press the dust collection box release buttons4
and pull the dust collection box away from the dust
extraction system. Once the catch mechanism is clear
of the dust extraction system the upper joint will
also release allowing the dust collection box to be
removedcompletely.
2. Discard dust collection box 3 replace with a new
DWH302DH filterbox.
3. Reattach the dust collection box to the dust extraction
system. First insert the rounded profile of the upper joint
into the recess on the dust extraction system. Pivot the
dust collection box down so that the release buttons
click back intoplace.
Replacing the Dust Extraction Head
(Fig. A, G)
WARNING:ALWAYS use eye protection (CAN/
CSA Z94.3).All users and bystanders must wear eye
protection that conforms to ANSI Z87.1.
WARNING: Use of this tool can generate and/
or disburse dust, which may cause serious and
permanent respiratory or other injury. Always use
NIOSH/OSHA approved respiratory protection
appropriate for the dustexposure.
The dust brush will wear during use and will need to be
replaced at the same time as thefilter.
1. Push the snap-fit button 15, and pull the dust
extraction head 8 out of the headholder.
2. Push the new extraction head back into the head
holder. The centering pin will stick into the open end of
the dust brush and secure it inplace.

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Fig. G
15
Cleaning
WARNING: Wear approved eye protection and
approved dust mask when performing thisprocedure.
WARNING: Do not use a brush to clean the dust
collector orfilter.
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.
During intensive use the dust collector becomes clogged
with dust. Refer to Replacing The Dust Collector Box Filter
Assembly, underMaintenance.
Accessories
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.
Recommended accessories for use with your tool
are available at extra cost from your local dealer or
authorized service center. If you need assistance in
locating any accessory, please contact
DeWALT
Industrial
Tool Co., 701East Joppa Road, Towson, MD 21286, call
1-800-4-
DeWALT
(1-800-433-9258) or visit our website:
www.dewalt.com.
Repairs
The charger and battery pack are notserviceable.
WARNING: To assure product SAFETY and
RELIABILITY, repairs, maintenance and adjustment
(including brush inspection and replacement, when
applicable) should be performed by a
DeWALT
factory
service center or a
DeWALT
authorized service center.
Always use identical replacementparts.
Register Online
Thank you for your purchase. Register your product nowfor:
• WARRANTY SERVICE: Registering your product will
help you obtain more efficient warranty service in case
there is a problem with yourproduct.
• CONFIRMATION OF OWNERSHIP: In case of
an insurance loss, such as fire, flood or theft, your
registration of ownership will serve as your proof
ofpurchase.
• FOR YOUR SAFETY: Registering your product will
allow us to contact you in the unlikely event a safety
notification is required under the Federal Consumer
SafetyAct.
Register online at www.dewalt.com/register.
Three Year Limited Warranty
DeWALT
will repair, without charge, any defects due to
faulty materials or workmanship for three years from
the date of purchase. This warranty does not cover part
failure due to normal wear or tool abuse. For further detail
of warranty coverage and warranty repair information,
visit www.dewalt.com or call 1-800-4-
DeWALT
(1-800-
433-9258). This warranty does not apply to accessories
or damage caused where repairs have been made
or attempted by others. THIS LIMITED WARRANTY IS
GIVEN IN LIEU OF ALL OTHERS, INCLUDING THE IMPLIED
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, AND EXCLUDES ALL INCIDENTAL
OR CONSEQUENTIAL DAMAGES. Some states do not
allow limitations on how long an implied warranty lasts or
the exclusion or limitation of incidental or consequential
damages, so these limitations may not apply to you. This
warranty gives you specific legal rights and you may have
other rights which vary in certain states orprovinces.
In addition to the warranty,
DeWALT
tools are covered
byour:
1 YEAR FREE SERVICE
DeWALT
will maintain the tool and replace worn parts
caused by normal use, for free, any time during the first year
afterpurchase.
90 DAY MONEY BACK GUARANTEE
If you are not completely satisfied with the performance of
your
DeWALT
Power Tool, Laser, or Nailer for any reason, you
can return it within 90 days from the date of purchase with
a receipt for a full refund – no questionsasked.
LATIN AMERICA: This warranty does not apply to products
sold in Latin America. For products sold in Latin America,
see country specific warranty information contained in
the packaging, call the local company or see website for
warrantyinformation.
FREE WARNING LABEL REPLACEMENT: If your warning
labels become illegible or are missing, call 1-800-4-
DeWALT
(1-800-433-9258) for a freereplacement.