DeWalt DH4240B User manual

DH4240B
PressureWasher
INSTRUCTION MANUAL
If you have questions or comments, contact us.
1-877-FNA-GAS1 (1-877-362-4271)•www.dewaltpw.com

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A. Panel assembly
B. Nozzle Grommets
C. Professional Spray gun
D. Wheel
E. Quick-connect
spray wand
F. Frame
G. Engine dipstick/oil plug
H. Engine switch
I. Starter grip
J. Engine
K.Throttle control lever
L. Choke control
M. Fuel valve lever
N. Gas cap
O. Handle assembly
P. High-pressure hose
Q. High-pressure pump
DH4240B PRESSURE WASHER
Engine
Refer to the engine instruction manual for location and
operation of other engine controls.
Pump Specications
GENERAL PUMPTX1510A
Oil Capacity: 14 Ounces
For best results, pump oil designed specifically for
pressure washers is recommended, as these contain
a rust inhibitor and an anti-foaming agent. If this oil is
not available, an SAE 30W non-detergent oil may be
used.
H
FIG. 1
J
C
E
P
ABQN
DF
O
G
K
L
M
IENGINE

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Denitions: Safety Guidelines
The definitions below describe the level of severity
for each signal word. Please read the manual and pay atten-
tion to these symbols.
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 seri-
ous injury.
CAUTION: Indicates a potentially hazardous
situation which, if not avoided, may result in minor or moder-
ate injury.
NOTICE: Indicates a practice not related to personal injury
which, if not avoided, may result in property damage.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS
CONTACT US AT: www.dewaltpw.com or 1-877-FNA-GAS1
(1-877-362-4271)
Specications
MODEL WEIGHT HEIGHT WIDTH LENGTH PSI MAX* AVERAGE
OPERATING
PSI
GPM MAX* AVERAGE
OPERATING
GPM
ENGINE
DH4240B 145 lbs 25.5" 28" 45" 4200
(29,958 kPa) 4100 (28,269 kPa) 4.0
(15.4 L/min)
3.9
(14.7L/min)
HONDA
389 cc OHV
* Maximum PSI and GPM ratings determined in accordance with the Pressure Washers Manufacturers Association (PWMA)
standard PW101
Important Safety Instructions
DANGER: Carbon Monoxide. Using an engine indoors can kill
you in minutes. Engine exhaust contains high levels of carbon
monoxide (CO), a poisonous gas you cannot see or smell. You
may be breathing CO even if you do not smell engine exhaust.
WARNING: This product and its exhaust contain chemicals
known to the State of California to cause cancer, and birth
defects and other reproductive harm.
 NEVER use an engine inside homes, garages, crawlspaces or
other partly enclosed areas. Deadly levels of carbon monoxide
can build up in these areas. Using a fan or opening windows and
doors does NOT supply enough fresh air.
 ONLY use outdoors and far away from open windows, doors and
vents. These openings can pull in engine exhaust.
 
home. ALWAYS
alarm in your house. Read and follow all directions for CO
alarm before using. 
move to fresh air immediately. See a doctor. You could have
carbon monoxide poisoning.

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WARNING: Do not operate this unit until you read this instruction
manual and the engine instruction manual for safety, operation and
maintenance instructions.
WARNING: When using this product basic precautions should
always be followed, including the following:
1. Read all instructions before using the product.
 
a product is used near children.
 
thoroughly familiar with the controls.
4. Stay alert–watch what you are doing.
5. Do not operate the product when fatigued or under the influence
of alcohol or drugs.
6. Keep operating area clear of all persons.
7. Do not overreach or stand on unstable support. Keep good
footing and balance at all times.
8. Follow the maintenance instructions specified in the manual.
DANGER: RISK OF INJECTION OR SEVERE INJURY. KEEP
CLEAR OF NOZZLE. DO NOT DIRECT DISCHARGE STREAM AT
PERSONS.THIS PRODUCT ISTO BE USED ONLY BYTRAINED
OPERATORS.
WARNING:         
arresting muffler. If the product is not equipped and will be used
around flammable materials or on land covered with materials such
as agricultural crops, forest, brush, grass or other similar items, then

           
         

arrester, as defined in section 4442, and maintained in effective
         
Forest Service land and may also be legally required under other
statutes and ordinances.
WARNING: This product and its exhaust contain chemicals
known to the State of California to cause cancer, and birth
defects or other reproductive harm. In addition, some cleaning
products and dust contain chemicals known to the State of
California to cause cancer, and birth defects or other reproduc-
tive harm.Wash hands after handling.
Save theSe inStructionS
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Spilledgasolineandit’s
vapors can become ignited
from cigarette sparks,
electrical arcing, exhaust
gases and hot engine
components such as
the muffler.
 • Shutoffengineandallow
it to cool before adding fuel
to the tank.
 • Usecareinfillingtankto
avoid spilling fuel. Move
pressure washer away
from fueling area before
starting engine.
 • Heatwillexpandfuelinthe
tank which could result in
spillage and possible fire
explosion.
 • Keepmaximumfuellevel
1/2" (12.7 mm) below
bottom of filler neck
to allow for expansion.
 • Operatingthepressure
washer in an explosive
environment could
result in a fire.
 • Operateandfuelequipment
in well-ventilated areas free
fromobstructions.Equip
areas with fire extinguisher
suitable for gasoline fires.

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 • Materialsplacedagainstor
near the pressure washer
can interfere with its proper
ventilation features causing
overheating and possible
ignition of the materials.
 • Neveroperatepressure
washer in an area
containing dry brush or
weeds.
 • Mufflerexhaustheatcan
damage painted surfaces,
melt any material sensitive
to heat (such as siding,
plastic, rubber, vinyl or the
pressure hose, itself), and
damage live plants.
 • Alwayskeeppressure
washer a minimum of 4'
(1.2 m) away from surfaces
(such as houses, automo-
biles or
live plants) that could be
damaged from muffler
exhaust heat.
 • Improperly stored fuel could
lead to accidental ignition.
Fuel improperly secured
could get into the hands of
childrenorotherunqualified
persons.
 • StorefuelinanOSHA
approved container, in a
secure location away from
work area.
 • Useofacids,toxicor
corrosive chemicals,
poisons, insecticides, or
any kind of flammable
solvent with this product
could result in serious injury
or death.
 • Donotsprayflammable
liquids.
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Breathingexhaustfumes
will cause serious injury
or death! Engine exhaust
contains carbon monoxide,
an odorless and deadly
gas.
 • Operatepressurewasherin
a well-ventilated area. Avoid
enclosed areas such as
garages, basements, etc.
 • Neveroperateunitinor
near a location occupied by
humans or animals.
 • Somecleaningfluids
contain substances which
could cause injury to skin,
eyes or lungs.
 • Useonlycleaningfluids
specifically recommended
for high-pressure washers.
Follow manufacturers
recommendations. Do not
use chlorine bleach or any
other corrosive compound.

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 • Donotallowhosetocontact
muffler.
 • Neverattachorremove
wand or hose fittings while
system is pressurized.
 • Whenusingreplacement
lances or guns with this
pressure washer, DO NOT
use a lance and/or lance/
gun combination that is
shorter in length than
what was provided with
this pressure washer as
measured from the nozzle
end of the lance to the gun
trigger.
 • Injuriescanresultifsystem
pressure is not reduced
before attempting
maintenance or
disassembly.
 • Torelievesystempres
sure, shut off engine, turn
off water supply and pull
gun trigger until water stops
flowing.
 • Use only accessories rated
equaltoorhigherthan
the rating of the pressure
washer.
DANGER: RISK OF FLUID INJECTION AND LACERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Yourpressurewasher
operates at fluid pressures
and velocities high enough
to penetrate human and
animal flesh, which could
result in amputation or
other serious injury. Leaks
caused by loose fittings or
worn or damaged hoses
can result in injection
injuries. DO NOT TREAT
FLUID INJECTION AS
A SIMPLE CUT! See a
physician immediately!
 • Inspectthehighpressure
hose regularly. Replace
the hose immediately if it is
damaged, worn, has melted
from contacting the engine,
or shows any signs of
cracks, bubbles, pinholes, or
other leakage. Never grasp a
high-pressure hose that
is leaking or damaged.
 • Nevertouch,graspor
attempt to cover a pinhole
or similar water leak on the
high-pressure hose.The
stream of water IS under
high pressure and WILL
penetrate skin.
 • Neverplacehandsinfront
of nozzle.
 • Directsprayawayfromself
and others.
 • Makesurehoseandfittings
are tightened and in good
condition.Never hold onto
the hose or fittings during
operation.

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DANGER: RISK OF INJURY FROM SPRAY
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Highvelocityfluidspray
can cause objects to break,
propelling particles at high
speed.
 • AlwayswearANSIapproved
Z87.1 safety glasses.Wear
protective clothing to protect
against accidental spraying.
 • Neverpointwandator
spray people or animals.
 • Lightorunsecuredobjects
can become hazardous
projectiles.
 • Alwayssecuretriggerlock
when wand is not in service
to prevent accidental
operation.
 • Neverpermanentlysecure
trigger in pull-back (open)
position.
DANGER: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Unsafeoperationofyour
pressure washer could lead
to serious injury or death to
you or others.
 • Donotusechlorine
bleach or any other
corrosive compound.
 • Becomefamiliarwiththe
operation and controls of
the pressure washer.
 • Keepoperatingareaclear
of all persons, pets and
obstacles.
 • Donotoperatetheproduct
when fatigued or under
the influence of alcohol or
drugs. Stay alert at all times.
 • Neverdefeatthesafety
features of this product.
 • Donotoperatemachine
with missing, broken or
unauthorized parts.
 • Neverleavewand
unattended while unit
is running.

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 • Ifproperstartingprocedure
is not followed, engine can
kickback causing serious
hand and arm injury.
 • Ifenginedoesnotstartafter
twopulls,squeezetrigger
of gun to relieve pump
pressure. Pull starter cord
slowly until resistance is felt.
Then pull cord rapidly to
avoid kickback and prevent
hand or arm injury.
 • Thespraygun/wandis
a powerful cleaning tool
that could look like a toy
to a child.
 • Keepchildrenawayfrom
the pressure washer at all
times.
 • Reactiveforceofspray
will cause gun/wand to
kickback, and could cause
the operator to slip or fall
or misdirect the spray.
Improper control of gun/
wand can result in
injuries to self and
others.
 • Donotoverreachorstand
on an unstable support.
 • Donotusepressurewasher
while standing on a ladder.
 • Gripgun/wandfirmlywith
both hands. Expect the
gun to kickback when
triggered.
DANGER: RISK OF INJURY OR PROPERTY DAMAGE
WHENTRANSPORTING OR STORING
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Fueloroilcanleakorspill
and could result in fire or
breathing hazard. Serious
injury or death can result.
Fuel or oil leaks will damage
carpet, paint or other
surfaces in vehicles
or trailers.
 • Oilcouldfillthecylinder
and damage the engine
if the unit is not stored or
transported in an upright
position.
 • Ifpressurewasheris
equippedwithafuelshut
off valve, turn the valve to
the OFF position before
transporting to avoid fuel
leaks.If pressure washer
isnotequippedwithafuel
shut-off valve, drain the fuel
from tank before transport-
ing.Only transport fuel in an
OSHA-approved container.
Always place pressure
washer on a protective mat
when transporting to protect
against damage to vehicle
from leaks.
Always transport and store
unit in an upright position.
Remove pressure washer
from vehicle immediately
upon arrival at your
destination.

9
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WARNING: RISK OF BURSTING
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Over inflation of tires could
result in serious injury and
property damage.
 • Useatirepressuregauge
to check the tires pressure
before each use and while
inflating tires; see the tire
sidewall for the correct tire
pressure.
NOTE: Air tanks,
compressors and similar
equipmentusedtoinflate
tires can fill small tires similar
to these very rapidly. Adjust
pressure regulator on air
supply to no more than the
rating of the tire pressure.
Add air in small increments
andfrequentlyusethetire
gauge to prevent over
inflation.
 • Highvelocityfluidspray
directed at pneumatic tire
sidewalls (such as found
on automobiles, trailers and
the like) could damage the
sidewall resulting in serious
injury.
 • Onpressurewashersrated
above 1600 psi (11032 kPa)
use the widest fan spray
(40º nozzle) and keep the
spray a minimum of 8"
(20 cm) from the pneumatic
tire sidewall. Do not aim
spray directly at the joint
between the tire and rim.
WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Contactwithhotsurfaces,
such as engines exhaust
components, could result in
serious burn.
 • Duringoperation,touch
only the control surfaces
of the pressure washer.
Keep children away from
the pressure washer at all
times.They may not be able
to recognize the hazards of
this product.

10
English
WARNING: RISK FROM MOVING PARTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Movingpartssuchasthe
pulley, flywheel, and belt
can cause serious injury if
they come into contact with
you or your clothing.
• Neveroperatewithguards
or covers which are dam-
aged or removed.
• Keepyourhair,clothing,
and gloves away from mov-
ing parts.Loose clothes,
jewelry, or long hair can be
caught in moving parts.
WARNING: RISK OF CHEMICAL BURN
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Useofacids,toxicor
corrosive chemicals,
poisons, insecticides, or any
kind of flammable solvent
with this product could result
in serious injury or death.
 • Donotsprayacids,
gasoline, kerosene, or any
other flammable materials
with this product. Use only
household detergents,
cleaners and degreasers
recommended for use with
pressure washers.
 • Wearprotectiveclothing
to protect eyes and skin
from contact with sprayed
materials.
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Spraydirectedatelectri
cal outlets or switches, or
objects connected to an
electrical circuit, could
result in a
fatal electrical shock.
 • Unpluganyelectrically
operated product before
attempting to clean it. Direct
spray away from electric
outlets and switches.
WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Seriousinjurycanresult
from attempting to lift too
heavy an object.
 • Thepressurewasheristoo
heavy to be lifted by one
person. Obtain assistance
from others before lifting.
Save theSe inStructionS
For Future uSe
inStaLLation
Pressure Washer Assembly (Fig. 1)
Verify the fuel and oil tanks are empty prior to installing the handle.
RefertotheHondaengineowner’smanualfordetails.Ifthefueland
oil tanks are not empty, raise the machine and provide adequate
support before performing this installation.
Always provide adequate support before performing these
operations.

11
English
5. Attach high-pressure
E
P
hose (P) to spray gun.
Make sure it is
secure.
6. Connect wand (E) to
spray gun. Make sure
connection is secure.
7. Place the grommets (B) onto the panel assembly (A) and push into
place.
B
A
 8.Removethefivecoloredquickconnectnozzlesfrom the plastic
bag and insert them into correct grommet on the nozzle holder.
Nozzles are color coded to match colored nozzles on panel
assembly.
NOTE: The high-pressure pump was filled with oil at the factory.
Always check oil level before using (refer to Maintenance for more
information).
WARNING:  
tires pressure before each use and while inflating tires; see the tire side-
wall for the correct tire pressure.
NOTE:Airtanks,compressorsandsimilarequipmentusedtoinflate
tires can fill small tires similar to these very rapidly. Adjust pressure
regulator on air supply to no more than the rating of the tire pressure.
Addairinsmallincrementsandfrequentlyusethe tire gauge to
prevent over inflation.
Tools required (Not included):
1/2" (13 mm) open-end wrench
1/2" (13 mm) socket or 1/2" (13 mm) wrench
Hardware (Included with your machine):
1 Handle (F)
1 Leg Assembly (DD)
4 Bolts (EE)
8 Flat Washers (FF)
4 Nuts (GG)
1. Remember to secure/support the machine before removing or
loosening the bolts. Use the wrench and socket to remove the
leg assembly bolts (EE, GG).
2. Position/slide the handle (O) into the frame (F) and on the out-
side of each side of the foot bracket assembly (DD).
3. Align the holes in the Handle with the mounting holes in the
frame and leg assemblies.
4. Fasten the handle (O) to the foot bracket (DD) and frame (F) with
the hardware (EE, FF, GG) from step 1 as shown and tighten
each nut until snug.
EE FF
O
DD
F
GG
FF
GG
FF EE
FF

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9. The pressure washer is now ready for handling.Make sure to fol-
lowtheOwner’sManualinstructionsbeforestartingthepressure
washer.
oPeration
Pressure Adjustments
The pressure setting is preset at the factory to achieve optimum
pressure and cleaning. To lower the pressure, follow these instruc-
tions.
1. Back away from the surface to be cleaned.The further away you
are, the less the pressure will be on the surface to be cleaned.
2. Change to the 40˚ nozzle (white). This nozzle delivers a less
powerful stream of water and a wider spray pattern. Refer to
Spray Wand Nozzles.
NOTICE:         
pressure setting than the factory set pressure may damage pump.
3. Reduce the speed of the gasoline engine (RPM). Slow the
engine down and the water pressure will go down with it.
Spray Wand Nozzles (Fig. 1)
The nozzles for the spray wand are stored in the nozzle holder (B) on
the panel assembly (A). Colors on the panel identify nozzle location
and spray pattern. Refer to the following chart to choose the correct
nozzle for the job to be performed.
Nozzle Color Spray Pattern Uses Surfaces*
Red
0˚ powerful
pinpoint for
very intense
cleaning
metal or
concrete;
DO NOT use
on wood
Yellow
15˚ intense
cleaning of
small areas
metal, concrete
or wood
Green
25˚intense
cleaning of
larger areas
metal, concrete
or wood
White
40˚covers wide
areas of
cleaning
metal, concrete,
wood or vinyl
Black
low pressure applies cleaning
solutions metal, concrete, wood or vinyl
* NOTICE: The high-pressure spray from your pressure washer
is capable of causing damage to surfaces such as wood, glass,

         
be cleaned to assure yourself that it is strong enough to resist
damage from the force of spray.
CHANGING NOZZLES ON SPRAY WAND
DANGER: 
    es or any pets or animals.


13
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WARNING: 
 attempt to change nozzles while pressure washer is running.
Turn engine off before changing nozzles.
 1.Pullquickconnectcouplerbackandinsert
nozzle.
 2.Release quickconnect coupler and
twist nozzle to make sure it is secure in
coupler.
WARNING: Flying object could cause risk


connect snap ring is fully engaged (forward)
before squeezing gun trigger.
Chemicals and Cleaning Solvents
Applying chemicals or cleaning solvents is a low-pressure operation.
NOTE: Use only soaps and chemicals designed for pressure washer
use. Do not use bleach.
TO APPLY CHEMICALS AND SOLVENTS
1. Press chemical hose (S) onto barbed fitting
S
located near high pressure hose connection
of pump as shown.
2. Place the other end of chemical hose with
filter on it into the container holding chemi-
cal/cleaning solution.
NOTE: For every 10 gallons (38 liters) of
water pumped 1 gallon (3.8 liters) of chemi-
cal/cleaning solution will be used.
 3.Installlowpressure(black)nozzleintoquickconnectfittingofspray
wand, refer to SprayWand Nozzles.
NOTE: Chemicals and soaps
will not siphon if the black soap nozzle is not installed on the
spray wand.
4. After use of chemicals, place chemical hose into container of clean
water and draw clean water through chemical injection system
to rinse system thoroughly. If chemicals remain in the pump it
could be damaged. Pumps damaged due to chemicals will not be
covered under warranty.
Starting
WARNING: 
instruction manual and the engine instruction manual before starting
pressure washer.
DANGER: 
high-pressure setting,   allow the high-pressure spray to
           

• Your washer operates at fluid pressures and velocities high
enough to penetrate human and animal flesh, which could result
in amputation or other serious injury. Leaks caused by loose fit-
tings or worn or damaged hoses can result in injection injuries.
DO NOT TREAT FLUID INJECTION AS A SIMPLE CUT! See a
physician immediately!
WARNING: Risk of fire, asphyxiation and burning. NEVER fill fuel
tank when engine is running or hot. Do not smoke when filling fuel
tank.
 

fuel spillage from engine and equipment before starting engine.
  run engine indoors or in enclosed, poorly ventilated
       
and deadly gas.
           
muffler during or immediately after use of your pressure
washer. Damage to hoses from contact with hot engine


14
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NOTICE: NEVER pull water supply hose to move pressure washer.
This could damage hose and/or pump inlet.
 
  turn water supply off while pressure washer engine is
running or damage to pump will result.
 
T
two minutes at a time. Pump operates in
bypass mode when spray gun trigger is not
pressed. When the temperature inside the
pump rises too high the thermal relief valve (T)
will open and release a gush of water in an
effort to lower the temperature inside the pump.
The thermal relief valve will then close.If pump is left in bypass
mode for more than two minutes internal components of the
pump can be damaged.
START-UP PROCEDURE
 1.Inawellventilatedoutdoorarea,addfresh,highquality,unleaded
gasoline with a pump octane rating of 86 or higher. Do not overfill.
Wipe up spilled fuel before starting the engine. Refer to engine
instruction manual for correct procedure.
2. Check engine oil level. Refer to the engine instruction manual for
correct procedure.
3. Connect the water hose to the water source.Turn the water source
on to remove all air from the hose. When a steady stream of water
is present, turn the water source off.
4. Verify the filter screen (U) is in water inlet of pump.
U
The cone side faces out.
5. Connect the cold water source (V) to pump inlet.
NOTE: Water source must provide a minimum of
5 gallons per minute at 20 psi (138 kPa).
WARNING: To reduce the possibility of contamination always pro-

6. Connect high-pressure hose (P) to pump
V
P
outlet.
7. If applying a chemical or cleaning solution,
refer to Chemicals and Cleaning Solvents.
8. Turn the water source on.
NOTICE: property damage.Failure to do
so could cause damage to the pump.
9. Remove all air from the pump and high pressure hose by depress-
ing trigger until a steady stream of water is present.
10. Turn the engine ON/OFF switch (H) to the ON position.
11. Place the fuel valve lever (M) in the ON postion.
12.
If the engine is cold, move the choke (K) to the CLOSED position
as shown.
M
H
K
13. WARNING: 
until resistance is felt. Then pull starter grip (I) rapidly to avoid

NOTE: Do not allow the starter grip to snap back. Return it gently
by hand.
WARNING:         
after two pulls, squeeze trigger of gun to relieve pump pressure.Pull
starter cord slowly until resistance is felt. Then pull cord rapidly to


15
English
NOTE: If the oil level in the engine is low, the engine will not start.
If the engine does not start, check the oil level and add oil as
needed.
14. As the engine warms up, move the choke to
the OPEN position.
15. Depress trigger on gun to start water flow.
WARNING:     
on a stable surface and grip gun/wand firmly with
       
triggered.
16. Release trigger to stop water flow.
DANGER: X

accidental spraying.
17. Adjust spray for the task being performed
by changing quick connect nozzle. Refer to
Spray Wand Nozzles.
Shutting Down
1. If chemicals were applied, place the chemical hose into a
container of clean water and draw clean water through chemical
injection system to rinse system thoroughly.
NOTICE:   property damage Failure to do so could cause
damage to the pump.
2. Place the engine ON/OFF switch (H) to the OFF Position.
3. Place the fuel valve lever (M) in the OFF
postion.
NOTICE:  turn
water supply off while pressure washer engine is
running or damage to pump will result.
4. Turn water source off.
5. Pull trigger on spray gun to relieve any water pressure in hose or
spray gun.
6. Refer to Storage for proper storage procedures.
Maintenance
WARNING: burning. When performing maintenance, you
may be exposed to hot surfaces, water pressure or moving parts that

WARNING:         
the engine cool and release all water pressure before performing
any maintenance or repair. The engine contains flammable fuel. Do

To ensure efficient operation and longer life of your pressure washer,
a routine maintenance schedule should be prepared and followed.
If the pressure washer is used in unusual conditions, such as high
temperatures or dusty conditions, more frequent maintenance
checkswillberequired.
Engine
Consult the engine instruction manual for the manufacturer's recom-
mendations for any and all maintenance.
NOTE:Thepressurewasherframeisequippedwithanoildrain
hole to help make changing the engine oil easier.
Pump
NOTE: The pump was filled with oil at the factory.
Change pump oil after the first 50 hours of operation and every 300
hours thereafter.
TO CHECK OIL
The oil level should come to the dot in the middle of the sight
glass (AA).

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HOW TO CHANGE BB
AA
CC
PUMP OIL
1. Loosen pump dipstick/oil
plug (BB).
2. Place a container under
the oil drain plug (CC).
3. Remove pump oil drain
plug.
4. Afteroilisdrained,replace
oil drain plug.Tighten securely.
5. Remove pump dipstick/oil plug and fill with 30W non-detergent
oil.
6. Replace pump dipstick/oil plug and tighten securely.
Nozzle Cleaning
If the nozzle becomes clogged with foreign materials, such as dirt,
excessive pressure may develop. If the nozzle becomes partially
clogged or restricted, the pump pressure will pulsate. Clean the
nozzle immediately using the nozzle kit supplied and the following
instructions:
1. Shut off the pressure washer and turn off the water supply.
2. Pull trigger on gun handle to relieve any water pressure.
3. Disconnect the spray wand from the gun.
4. Removethehigh-pressurenozzlefromthe Y
spray wand. Remove any obstructions
with the nozzle cleaning tool (Y) provided
and back flush with clean water.
5. Direct water supply into spray wand to
back flush loosened particles for 30
seconds.
6. Reassemble the nozzle to the wand.
7. Reconnect spray wand to gun then turn on water supply.
8. Start pressure washer and place spray wand into high pressure
setting to test.
To Clean the Water Inlet Filter
This filter screen (U) should be checked periodically and cleaned if
necessary.
1. Remove the filter screen (U) by grasping the
U
end and removing it from water inlet of
pump.
2. Clean filter by flushing it with water on both
sides.
3. Reinsert filter into water inlet of pump. Cone
side faces out.
NOTE: Do not operate pressure washer without
filter properly installed.
To Remove Tires
1. Using a 1/8" hex head wrench loosen set
screw in hub collar.
2. Slide hub collar from axle and remove the
tire.
StoraGe
Engine
Consult the engine instruction manual for the manufacturer's
recommendations for storage.
Pump
The manufacturer recommends using a pump protector/winter-
izer, such as DeWALT winterizer (DP80) when storing the unit
for more than 30 days and/or when freezing temperatures are

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expected. DeWALT winterizer (DP80) is availabe at the store
where the pressure washer was purchased. If a pump protector/
winterizer is not available, RV antifreeze can be used as outlined in
the following steps.
NOTE: Using a pump protector/ winterizer or RV antifreeze helps to
provide proper lubrication to the internal seals of the pump regard-
less of temperature or environment.
1. Obtain a funnel, 6 oz. (170 mL)
of RV antifreeze and 16–36"
(40–91cm) of garden hose with a
male hose connector attached to
one end.
NOTICE: 
     
antifreeze is corrosive and can dam-
age pump.
2. Disconnect spark plug wire.
3. Connect length of garden
hose to water inlet of pump.
4. Add RV antifreeze to hose as shown.
5. Pull engine starter rope slowly several times until antifreeze
comes out of high-pressure hose connection of pump.
6. Remove garden hose from water inlet of pump.
7. Reconnect spark plug wire.
Pressure Washer
1. Drain all water from high-pressure hose, coil it and store it in
cradle of the pressure washer handle.
2. With nozzle pointed down and the spray gun and wand in a
verticalposition,squeezetriggertodrainall waterfromspray
gun and wand. Store in gun holder.
3. Store chemical hose so it is protected from damage.
CAUTION:
handle and frame when assembling to prevent pinching.
NOTICE: 
in an upright position.
acceSSorieS
Recommended accessories for use with your tool are available for
purchase from your local dealer or authorized service center. If you
need assistance in locating any accessory for your tool, please con-
tact the FNA Group at www.dewaltpw.com, 1825 Greenleaf Avenue,
Elk Grove Village, Il 60007, or call (877) FNA-GAS1.
DANGER: When using replacement lances
or guns with this pressure washer,   use a lance and/or
lance/gun combination that is shorter in length than what was pro-
vided with this pressure washer as measured from the nozzle end
of the lance to the gun trigger.
WARNING: The use of any other accessory not recommended for
use with this tool could be hazardous. Use only accessories rated
equal to or higher than the rating of the pressure washer.
Service inForMation
Please have the following information available for all service calls:
Model Number ____________ Serial Number ___________
Date and Place of Purchase ____________________________
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment should be performed by a FNA factory service
center,aFNAauthorizedservicecenterorotherqualifiedservice
personnel. Always use identical replacement parts.

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Limited Warranty
This pressure washer is warranted for three years from date of pur-
chase.We will repair, without charge, any defects due to faulty mate-
rials or workmanship. This warranty does not cover parts that are
damaged through misuse or abuse, or parts which must be replaced
from time to time due to normal pressure washer operation. Normal
wear parts include, but are not limited to, the engine air filter, spark
plug, pump valve seals and O rings.This warranty does not apply to
accessories or damage caused where repairs have been made or
attempted by a repair center not authorized by FNA. This warranty
gives you specific legal rights and you may have other rights which
vary in certain states or provinces. For further details of warranty
coverage and warranty repair information, visit www.dewaltpw.com
and click on Service and Support or call 1-877-FNA-GAS1 (1-877-
362-4271).
LATIN AMERICA: This warranty does not apply to products sold in
Latin America. For products sold in Latin America, see country spe-
cific warranty information contained either 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 1-877-FNA-GAS1 (1-877-362-
4271)for a free replacement.

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Glossary
Bypass mode: Allows water to re-circulate within pump when the gun trigger is not pulled.
Chemical hose: Feeds cleaning agents into the pump to mix with the water. Refer to Chemicals and Cleaning Solvents.
Chemical injection system: Mixes cleaners or cleaning solvents with water to improve cleaning effectiveness.
Choke control: Opens and closes carburetor choke valve.
CU: Cleaning Units. GPM multiplied by psi. (GPM x PSI = CU)
Fuel valve lever: Opens/closes connection between fuel tank and carburetor.
GPM: Gallons Per Minute.The unit of measure for the flow rate of water.
PSI:PoundsperSquareInch.Theunitofmeasureforwaterpressure.Alsousedforairpressure,hydraulicpressure,etc.
kPa (kilopascal): Metricpressuremeasurement.1kilopascalequal1000pascals.
Quick-connect spray wand: Allowstheusertoquicklychangeouthighpressurenozzles.RefertoSprayWandNozzles.
Thermal relief valve: When the temperature inside the pump rises too high the valve will open and release a gush of water in an effort to
lower the temperature inside the pump.The valve will then close.
Water supply: Allpressurewashersmusthaveasourceofwater.Theminimumrequirementsforawatersupplyare20psi(138kPa)and
5 gallons per minute.

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Troubleshooting Guide
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The
operatorormaintenancepersonnelcanperformsomecorrectiveactions,andothersmayrequiretheassistanceofaqualifiedFNAtechni-
cian or your dealer.
Problem Code
Engine will not start ......................................................................................................1, 2, 3, 4, 5, 6, 7, 8, 36
(refer to the engine's instruction manual for further engine troubleshooting)
No or low pressure (initial use)......................................................................................9, 10, 11, 12, 13, 14, 15, 16
Will not draw chemicals.................................................................................................16, 17, 18, 19, 20, 21
No or low pressure (after period of normal use)...........................................................22, 23, 24
Water leaking at gun/spray wand connection................................................................25, 26
Water leaking at pump...................................................................................................25, 26, 27, 28
Oil leaking at pump........................................................................................................29, 30, 31, 32, 33, 34, 35
Pump Pulsates...............................................................................................................12
Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 No fuel. Add fuel.
2 Low oil. Addrequiredamountofoil.
3 Pressure builds up after two pulls on the recoil starter or after initial
use. Squeezeguntriggertorelievepressure.
4 Choke lever in the NO CHOKE position. Move choke to the CHOKE position.
5 Spark plug wire not attached. Attach spark plug wire.
6 Engine ON/OFF switch in OFF position. Place engine ON/OFF switch in ON position.
7 Choke lever in the CHOKE position on a hot engine or an engine
that has been exposed to thermal heat for a long period of time. Move choke to the NO CHOKE position.