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INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTION MANUAL
DW250/DW270 V.S.R. Drywall Screwdriver
DW250/DW270 Tournevis pour murs secs
DW250/DW270 Destornillador para tablaroca VVR
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FIG. 5
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I
Maintenance
CLEANING
With the motor running, blow dirt and dust out of all air vents with dry
air at least once a week. Wear safety glasses when performing this.
Exterior plastic parts may be cleaned with a damp cloth and mild
detergent. Although these parts are highly solvent resistant, NEVER
use solvents.
Depth locator and adjustment collar should be removed and dust
blown out of clutch area housing at least once a week.
CHANGING CLUTCHES (FIG. 6)
1. Remove clutch housing by unscrewing in clockwise direction (left
hand thread).
2. Clamp tool or clutch housing in a resilient clamp.
3. Remove round clutch retaining rings with a very small screwdriver
or sharp pointed tool.
4. Install new clutches and new retaining rings. NOTE: If the output
spindle slides toward inside of gear case, remove dead spindle
spring and thread a 5/16"-18 bolt or cap screw into end of spindle and
lift up to expose retaining ring groove. Re-assemble dead spindle
spring allowing no more than 1/4" projecting from end of spindle.
5. Relubricate clutches. (See Lubrication.)
Lubrication (Fig. 7J
All bearings are factory lubricated for the life of the bearings. Gearing
and gear case should be relubricated every six months or when gear
case is removed for servicing as follows: (more often if the tool is used
constantly on production jobs) I
1. Remove three gear case screws from front and disassemble gear
~e. I
2. Clean out old grease and thoroughly clean all parts. I
3. Relubricate gear case and gearing with the quantity of heavy duty I
grease as called for on parts bulletin.
4. Reassemble.
Clutches should be lubricated at the same time the gearing is
relubricated in accordance with the following procedure:
1. Remove clutch housing by unscrewing in clockwise direction. (left I
hand thread).
2. Slip clutch assembly from clutch housing. I
3. Lightly brush or coat areas marked A, B with clutch grease. Coat
clutch face inside nose of gear case.
4. Reassemble clutch housing.
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IF YOU HAVE ANY QUESTIONS OR COMMEN"'(S ABOUT THIS
OR ANY DEWALTTOOL, CA~L US TOLL FREEAT:
1-800-4-DEWALT (1-800-433-9258)
ADJUSTING
COLLAR
ALUMINUM
DEPTH LOCATOR TRIGGER..-
REVERSING LEVER
SWITCH
BELT CLIP
Important Safety Instructions
WARNING: When using electric tools, basic safety precautions
should always be followed to reduce risk of fire, electric shock, and
personal injury, including the following:
READ ALL INSTRUCTIONS
Double Insulation
Double insulated tools are constructed throughout with two separate
layers of electrical insulation or one double thickness of insulation
between you and the tool's electrical system. Tools built with this
insulation system are not intended to be grounded. As a result, your
tool is equipped with a two prong plug which permits you to use
extension cords without concern for maintaining a ground
connection.
NOTE: Double insulation does not take the place of normal safety
precautions when operating this tool. The insulation system is for
added protection against injury resulting from a possible electrical
insulation failure within the tool.
CAUTION: WHEN SERVICING USE ONLY IDENTICAL
REPLACEMENT PARTS. Repair or replace damaged cords.
LOCKING BUTTON
Polarized Plugs
Polarized plugs (one blade is wider than the other) are used on
equipment to reduce the risk of electric shock. When provided. this
plug will fit into a polarized outlet only one way. If the plug does not
fit fully into the outlet, reverse the plug. If it still does not fit, contact
a qualified electrician to install the proper outlet. Do not change the
plug in any way.
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Safety Instructions For All Tools
. KEEP WORK AREA CLEAN. Cluttered areas and benches invite
injuries.
. CONSIDER WORK AREA ENVIRONMENT.Don't expose power
toolsto rain.Don't usepower toolsin dampor wetlocations.Keep
workarea welllit.Donot use toolinpresenceof flammableliquidsor
gases.
. GUARDAGAINST ELECTRIC SHOCK. Preventbody contactwith
grounded surfaces. For example; pipes, radiators, ranges, and
refrigeratorenclosures.
. KEEP CHILDREN AWAY. Do not let visitors contact tool or
extensioncord.All visitorsshouldbe kept awayfrom workarea.
. STORE IDLE TOOLS. Whennot in use, tools shouldbe stored in
dry,andhighorlocked-upplace- outof reach of children.
. DON'T FORCE TOOL. It will do the job better and safer at the rate
for whichit wasintended.
. USERIGHT TOOL. Don't force small tool or attachment to do the
job of a heavy-dutytool.Don't usetool forpurpose not intended.
. DRESS PROPERLY.Do not wear loose clothing orjewelry. They
can be caught in moving parts. Rubber gloves and non-skid
footwear are recommended when working outdoors. Wear
protectivehaircoveringtocontainlonghair.
. USESAFETY GLASSES.Also usefaceor dustmaskif operationis
dusty.
. DON'T ABUSE CORD. Never carry tool by cord or yank it to
disconnect from receptacle. Keep cord from heat, oil, and sharp
edges.
. SECURE WORK.Useclamps or a viseto hold work.It's safer than
usingyourhandand it frees both hands to operatetool.
. DON'T OVERREACH. Keep proper footing and balance at all times.
. MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for
betterandsaferperformance.Followinstructionsforlubricatingand
changing accessories. Inspect tool cords periodically and if
damaged, have repaired by authorized service facility. Inspect
extensioncordsperiodicallyand replaceif damaged.Keephandles
dry,clean,and freefromoil and grease.
. DISCONNECT OR LOCK OFF TOOLS when not in use, before
servicing, and when changing accessories, such as blades, bits,
cutters.
. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of
checking to see that keys and adjusting wrenches are removed from
tool before turning it on.
. AVOID UNINTENTIONAL STARTING. Don't carry tool with finger
on switch. Be sure switch is off when plugging in.
. EXTENSION CORDS. Make sure your extension cord is in good
condition. When using an extension cord, be sure to use one heavy
enough to carry the current your product will draw. An undersized
cord will cause a drop in line voltage resulting in loss of power and
overheating. The following table shows the correct size to use
depending on cord length and nameplate ampere rating. If in doubt,
use the next heavier gage. The smaller the gage number, the
heavier the cord.
Volts
120V
240V
Ampere Rating
More Notmore
Than Than
0 - 6 18 16 16 14
6 - 10 18 16 14 12
10 - 12 16 16 14 12
12 - 16 14 12 NotRecommended
. OUTDOOR USE EXTENSION CORDS. When tool is used
outdoors, use only extension cords intended for use outdoors and so
marked.
. STAY ALERT. Watch what you are doing. Use common sense. Do
not operate tool when you are tired.
Minimum Gagefor Cord Sets
Total Length of Cord in Feet
0-25 26-50 51-100 101-150
0-50 51-100 101-200 201-300
AWG
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. CHECK DAMAGED PARTS. Before further use of the tool, a guard
or other part that is damaged should be carefully checked to
determine that it will operate properly and perform its intended
function. Check for alignment of moving parts, binding of moving
parts, breakage of parts, mounting, and any other conditions that
may affect its operation. A guard or other part that is damaged
should be properly repaired or replaced by an authorized service
center unless otherwise indicated elsewhere in this instruction
manual. Have defective switches replaced by authorized service
center. Do not use tool if switch does not turn it on and off.
. CAUTION: When drilling or driving into walls, floors or wherever live
electrical wires may be encountered, DO NOT TOUCH ANY METAL
PARTS OF THE TOOL! Hold the tool only by insulated grasping
surfaces to prevent electric shock if you drill or drive into a live wire.
SAVE THESE INSTRUCTIONS
Switches (Fig. 1 & 2J
To start unit, depress trigger switch; to stop unit, release trigger. To lock
trigger in "ON" position for continuous operation, depress trigger and
push up locking button "A" Fig. 1, then gently release trigger~ To
release locking mechanism, depress trigger fully, then release it.
Before using the tool (each time) be sure that the lock button release
mechanism is working freely.
Be sure to release the switch locking button before disconnecting the
plug from the power supply. Failure to do so will cause the tool to start
immediately the next time it is plugged in. Damage or injury could
result.
The variable speed trigger switch permits speed contro-the farther
the trigger is depressed, the higher the speed of the unit.
For maximum tool life, use lower speed only for starting the fastener.
Continuous use at lower speed is not recommended.
The reversing switch is located above the trigger switch (Fig. 2). To
reverse the motor, release the trigger FIRST and then push the lever to
the left (when viewed as in Fig. 2). When removing screws, use
reversing switch in low speed to keep bit seated firmly in screw head.
After any reversing operations, return switch to forward position by
pushing it to the right (when viewed as in Fig'. 2).
Brushes
DEWALT uses an advanced brush system which automatically stops
the tool when the brushes wear out. This prevents serious damage to
the motor.
Changing Bit Tip (Fig. 3J
1. Pull forward on adjustment collar and remove from clutch housing:
2. Use pliers to remove worn bit.
3. Install new bit tip.
Dead Spindle Action
All DEWALT screwdrivers provide a "dead" front spindle to permit
fasteners to be located in the driving accessory. Clutches are held
apart by light spring pressure permitting the driving clutch to rotate
without turning the driven clutch and accessory. When sufficient
forward pressure isapplied to the unit, the clutches engage and rotate
the spindle and accessories.
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Depth Adjustment (Fig. 4J
1. Rotate adjustment collar. Clockwise rotation will provide deeper
seating of screws.
2. Test drive a fastener in scrap material to determine if fastener is
correctly seating.
3. Further adjustment may be necessary to increase or decrease the
fastener depth.
TO INCREASE, turn the adjustment collar so that end of bit
extends further beyond the end of locator.
TO DECREASE, turn the adjustment collar so that end of bit is
closer to end of locator.
DEWALT screwdrivers have very fine depth settings; each "click" is
.007". One complete revolution of the locator collar equals .083"
change in depth setting.
Operation
1. Install bittip in bit tip holder.
2. Adjust depth locator.
3. Check for correct rotation, start screwdriver and place screw on bit.
4. Contact work surface applying forward pressure to drive screw
until depth locator contacts work surface. Screwdriver will ratchet
automatically disengaging bit from screw.
5. This depth sensitive screwdriver is suitable for driving both deck
and drywall screws.
Tips ForDriving Screws Into Deck
1. Select proper length deck screws to insure complete anchoring
into the wood.
2. Although the screwdriver will drive drywall screws into decks, we
recommend screws specifically designed for deck assembly. Other
fasteners may not drive as well or hold as satisfactorily.
3. When using the tool for the first time to drive screws into pressure-
treated lumber, practice driving some screws in scrap material to
get the "feel" and to adjust for proper seating depth.
FIG.3
DEPTH
LOCATOR
DEPTH
LOCATOR
4. Once a screw has started driving, do not stop the screwdriver until
the screw is seated. Keep firm pressure on the tool. Because of the
high driving torque required in pressure-treated wood, the head of
the deck screw may strip if the screwdriver user fails to maintain
steady pressure on the bit.
5. More pressure can be applied to the bit ifthe screwdriver is gripped
by sliding the thumb and index finger along the side of the tool near
the top. Actuate the trigger with middle finger and/or fourth finger.
DEWALT has designed recesses along the top sides of your
screwdriver to allow for a comfortable grip. (See Fig. 5.)
6. Before driving deck screws check that there is no gap between the
boards to be fastened together.
7. Avoid driving screws through knots. Screws are difficult to start into
knots. If a knot can't be avoided, first drill a pilot hole equal in
diameter to the body diameter of the deck screw.
8. Keep a few additional bits on hand before starting any job.
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FIG. 7
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CLUTCH
- ASSEMBLY
I B
,
ADJUSTMENTCOLLAR I
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CLUTCH HOUSING (left hand thread)
Accessories
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 for your tool, please
contact your local dealer or authorized service center.
CAUTION: The use of any other accessory not recommended for use
with this tool could be hazardous.
Full Warranty
DEWALTheavy duty industrial tools are warranted for one year from
date of purchase. We will repair, without charge, any defects due to
faulty materials or workmanship. Arrangements have been made
with the Industrial Tool Division of Black & Decker (U.S.) Inc. to
provide warranty repairs for DEWALT tools. Please return the II-
complete unit, transportation prepaid, to any Black & Decker (U.S.)
Inc. Industrial Service Center or Authorized Service Station listed
under "Tools, Electric" in the Yellow Pages. This warranty does not
apply to accessories or damage caused where repairs have been
made or attempted by others. This warranty gives you specific legal
rights and you may have other rights which vary from state to state.
In addition to the warranty, DEWALT tools are covered by our:
30 DAY NO RISK SATISFACTION GUARANTEE
If you are not completely satisfied with the performance of your
DeWalt heavy duty industrial tool, simply return it to the participating
seller within 30 days for a full refund. Please return the complete unit,
transportation prepaid. Proof of purchase may be required.
Important
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment should be performed by DEWALT certified service
centers or other qualified service organizations. These service
organizations service DEWALT tools always using DEWALT
replacement parts. Black & Decker (U.S.) Inc. industrial tool service
centers are certified for servicing DEWALT industrial tools.
Imported by
Black & Decker (U.S.) Inc.,
701 E. Joppa Rd.
Towson, MD 21286 U.S.A.
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See 'Tools-Electric'
- Yellow Pages -
for Service & Sales
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