DEWALT DP3400 Pressure Washer Instruction Manual
- September 16, 2024
- Dewalt
Table of Contents
DP3400 Pressure Washer
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Specifications
- Model: DP3400
- Weight: 114 lbs (51.7 kg)
- Height: 73.7 cm
- Width: 61.0 cm
- Length: 101.6 cm
- Max PSI: 3400 (3443 kPa)
- Operating PSI: 3060 (1099 kPa)
- Max GPM: 3.0
Product Usage Instructions
1. Assembly
Follow the instructions in the manual to assemble the handle,
frame, high-pressure pump, engine, and other components as shown in
Fig. 1.
2. Engine and Pump
Refer to the engine instruction manual for location and
operation of engine controls. Use DP70 oil with an oil capacity of
14 oz. for the pump.
3. Safety Guidelines
Read and understand the safety guidelines provided in the manual
to prevent hazards and ensure safe operation of the pressure
washer.
4. Operating Instructions
-
Ensure you have read all instructions before using the
product. -
Supervise closely when using near children.
-
Know how to stop the product and bleed pressures quickly.
-
Avoid operating when fatigued or under the influence.
-
Maintain a clear operating area and do not overreach.
-
Follow maintenance instructions as specified.
FAQ
Q: What type of oil should be used for the pump?
A: Use DP70 oil with an oil capacity of 14 oz. for the pump.
Q: How often should maintenance be performed on the pressure
washer?
A: Follow the maintenance instructions specified in the manual
for regular upkeep of the pressure washer.
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If you have questions or comments, contact us.
1-800-4-DeWALT · www.dewalt.com
INSTRUCTION MANUAL
DP3400 Pressure Washer
DP3400 PRESSURE WASHER
A. Handle assemble
I. Engine dipstick/oil plug
FIG. 1
P
B. Frame
J. High-pressure pump
C. High-pressure hose
K. Engine
D. Spray gun
L. Choke control
K
E. Quick-connect
M. Starter grip
spray wand
N. Fuel valve lever
Q
F. Panel assembly G. Nozzle holder
O. Engine switch P. Gas cap
L
H. High-pressure pump
Q. Throttle control lever
N
dipstick/oil plug
M
ENGINE
Refer to the engine instruction manual for location and operation of other
engine controls.
Pump Specifications
I
GENERAL TX1508
Oil: Use DP70
Oil Capacity: 14 oz. (414 ml)
CF A
GD
H
E J O
B
Specifications
MODEL WEIGHT HEIGHT WIDTH LENGTH PSI MAX OPERATING GPM MAX PSI
DP3400 114 lbs
9″
4″
40″
3400
3060
(51.7 kg) (73.7 cm) (61.0 cm) (101.6 cm) (3443 kPa) (1099 kPa)
- Water flow and maximum pressure ratings determined in accordance with PWMA standard PW101.
OPERATING GPM
.9
ENGINE
Honda 9 Hp GX370
Definitions: Safety Guidelines
The definitions below describe the level of severity for each signal word.
Please read the manual and pay attention 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 serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. CAUTION: Used without the safety alert
symbol indicates a potentially hazardous situation which, if not avoided, may
result in property damage.
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)
Important Safety Instructions
WARNING: Do not operate this unit until you read and understand 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. 2.
To reduce the risk of injury, close supervision is necessary when
a product is used near children.
3. Know how to stop the product and bleed pressures quickly. Be thoroughly
familiar with the controls.
4. Stay alertwatch 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 IS TO BE USED ONLY BY TRAINED
OPERATORS.
WARNING: This product may not be equipped with a sparkarresting 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 an approved spark arrester must be installed and
is legally required in the state of California. It is a violation of
California statutes section 130050 and/or sections 4442 and 4443 of the
California Public Resources Code, unless the engine is equipped with a spark
arrester, as defined in section 4442, and maintained in effective working
order. Spark arresters are also required on some U.S. Forest Service land and
may also be legally required under other statutes and ordinances.
WARNING: This product contains chemicals, including lead, known to the State
of California to cause cancer, and birth defects or other reproductive harm.
Wash hands after handling.
SAve TheSe InSTrucTIonS
3
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN
HOW TO PREVENT IT
· Spilled gasoline and it’s vapors can become ignited from cigarette sparks, electrical arcing, exhaust gases and hot engine components such as the muffler.
· Shut off engine and allow it to cool before adding fuel to the tank.
· Use care in filling tank to avoid spilling fuel. Move pressure washer away
from fueling area before starting engine.
· Heat will expand fuel in the tank which could result in spillage and possible fire explosion.
· Keep maximum fuel level 1/” (1.7 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 obstructions. Equip areas with fire extinguisher suitable for gasoline fires.
· Materials placed against or near the pressure washer can interfere with its proper ventilation features causing overheating and possible ignition of the materials.
· Never operate 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. m) away from surfaces (such as houses, automobiles 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 other unqualified persons.
· 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.
· Store fuel in an OSHAapproved container, in a secure location away from work
area.
· Do not spray flammable liquids.
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN
HOW TO PREVENT IT
· Breathing exhaust 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 operate unit in a location occupied by humans or animals.
4
DANGER: RISK TO BREATHING (ASPHYXIATION) CONTINUED
· Some cleaning fluids contain substances which could cause injury to skin, eyes or lungs.
· Use only cleaning fluids specifically recommended for high-pressure washers. Follow manufacturers recommendations. Do not use chlorine bleach or any other corrosive compound.
DANGER: RISK OF FLUID INJECTION AND LACERATION
WHAT CAN HAPPEN
HOW TO PREVENT IT
· Your pressure washer
· Inspect the high-pressure
operates at fluid pressures
hose regularly. Replace
and velocities high enough to the hose immediately if it is
penetrate human and
damaged, worn, has melted
animal flesh, which could
from contacting the engine,
result in amputation or
or shows any signs of cracks,
other serious injury. Leaks
bubbles, pinholes, or other
caused by loose fittings or
leakage. Never grasp a
worn or damaged hoses can high-pressure hose that
result in injection injuries.
is leaking or damaged.
DO NOT TREAT FLUID INJECTION AS A SIMPLE CUT! See a physician immediately!
· Never touch, grasp or attempt to cover a pinhole or similar water leak on the highpressure hose. The stream
of water IS under high
pressure and WILL
penetrate skin.
· Never place hands in front
of nozzle.
· Injuries can result if system pressure is not reduced before attempting maintenance or disassembly.
· Direct spray away from self and others.
· Make sure hose and fittings are tightened and in good condition. Never hold
onto the hose or fittings during operation.
· Do not allow hose to contact muffler.
· Never attach or remove wand or hose fittings while system is pressurized.
· To relieve system pressure, 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.
5
DANGER: RISK OF INJURY FROM SPRAY
WHAT CAN HAPPEN
· High-velocity fluid spray can cause objects to break, propelling particles
at high speed.
HOW TO PREVENT IT
· 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 operation 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.
· Become familiar 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 operate machine with missing, broken or unauthorized parts.
· Never leave wand unattended while unit is running.
6
· If proper starting procedure is not followed, engine can kickback causing
serious hand and arm injury.
· The spray gun/wand is a powerful cleaning tool that could look like a toy to
a child.
· 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.
· 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.
· Keep children away from the pressure washer at all times.
· Do not overreach 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 WHEN TRANSPORTING 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.
· 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 transporting. 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. Remove pressure washer from vehicle immediately upon arrival at your destination.
7
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.
WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN
HOW TO PREVENT IT
· Contact with hot surfaces, such as engines exhaust components, could result in serious burn.
· During operation, 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.
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 use acids, gasoline, kerosene, or any other flammable materials in this product. Use only household detergents, cleaners and degreasers recommended for use in pressure washers.
· Wear protective clothing to protect eyes and skin from contact with sprayed materials.
8
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN
HOW TO PREVENT IT
· Spray directed at electrical outlets or switches, or objects connected to an electrical circuit, could result in a fatal electrical shock.
· Unplug any electrically 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)
1. Place handle assembly (A) onto frame, depress the snap buttons, and slide
the handle assembly onto the frame (B) until snap buttons are secured in
place.
CAUTION: Risk of personal injury. Avoid placing hands between handle and frame
when assembling to prevent pinching.
. Attach high-pressure hose (C) to spray gun (D). Make sure it is secure.
3. Connect wand (E) to spray gun. Make sure connection is secure.
4. Place the nozzle holder (G) onto the panel assembly (F) and push each
nozzle holder into place.
5. 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.
6. Using a 7/8″ wrench, remove shipping plug from pump by turning it
counterclockwise. Discard shipping plug. NOTE: The high-pressure pump was
filled with oil at the factory. Always check oil level before using (refer to
Maintenance for more information).
9
7. Remove dipstick/oil plug (H) from plastic bag and install into pump,
tighten securely. NOTE: The shipping plug must be removed and H replaced with
the dipstick/oil plug before operating pressure washer.
WARNING: Risk of bursting. 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.
oPerATIon
Pressure Adjustments
The pressure setting is preset at the factory to achieve optimum pres-
sure and cleaning. To lower the pressure, follow these instructions.
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.
. 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.
3. Adjust the pressure regulator on the
pump. Turn the pressure regulator knob (R)
R
counterclockwise to lower pressure. Once
you have finished using your pressure wash-
er, return the pressure regulator to its origi-
nal position by turning it clockwise.
CAUTION: Do not try to turn pressure regula-
tor knob past the built-in stop or damage to the
pump will result.
Spray Wand nozzles (Fig. 1)
The nozzles for the spray wand are stored in the nozzle holder (G) on the
panel assembly (F). 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 Red
Spray Pattern 0°
Uses
powerful pinpoint for very intense cleaning
Surfaces*
metal or concrete; DO NOT use on wood
15° Yellow
intense cleaning of small areas
metal, concrete or wood
5° Green
intense cleaning of larger areas
metal, concrete or wood
40° White
covers wide areas of cleaning
metal, concrete, wood or vinyl
Black
low pressure
applies cleaning metal, concrete,
solutions
wood or vinyl
10
- CAUTION: The high-pressure spray from your pressure washer is capable of causing damage to surfaces such as wood, glass, automobile paint, auto striping and trim, delicate objects such as flowers and shrubs. Before spraying, check the item to be cleaned to assure yourself that it is strong enough to resist damage from the force of spray.
CHANGING NOZZLES ON SPRAY WAND DANGER: Risk of fluid injection. Do not direct discharge stream
toward persons, unprotected skin, eyes or any pets or animals. Serious injury will occur.
WARNING: Flying objects could cause risk of serious injury. DO NOT attempt to change nozzles while pressure washer is running. Turn engine off before changing nozzles.
1. Pull quick-connect coupler back and insert nozzle.
. Release quick-connect coupler and twist nozzle to make sure it is secure in coupler.
WARNING: Flying object could cause risk of serious injury. Ensure nozzle is completely inserted in quick-connect socket and quickconnect 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 S fitting located near high pressure
hose connection of pump as shown.
. Place the other end of chemical hose with filter on it into the container
holding chemical/cleaning solution.
NOTE: For every 7 gallons (6.5 liters) of water pumped 1 gallon (3.8 liters)
of chemical/cleaning solution will be used.
3. Install low-pressure (black) nozzle into quick connect fitting of spray
wand, refer Spray Wand Nozzles.
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.
NOTE: Chemicals and soaps will not siphon when spray wand is in the high-
pressure setting.
Starting
WARNING: To reduce the risk of injury, read the pressure washer instruction
manual and the engine instruction manual before starting pressure washer.
DANGER: Risk of fluid injection and laceration. When using the highpressure
setting, DO NOT allow the high-pressure spray to come in contact with
unprotected skin, eyes, or with any pets or animals. Serious injury will
occur.
· 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 fittings or worn or damaged hoses can
result in injection injuries. DO NOT TREAT FLUID INJECTION AS A SIMPLE CUT!
See a physician immediately!
11
WARNING: Risk of fire, asphyxiation and burning. NEvER fill fuel
tank when engine is running or hot. Do not smoke when filling fuel tank.
· NEvER fill fuel tank completely. Fill tank to 1/2″ (12.7 mm) below
bottom of filler neck to provide space for fuel expansion. Wipe any
fuel spillage from engine and equipment before starting engine.
· NEvER run engine indoors or in enclosed, poorly ventilated
areas. Engine exhaust contains carbon monoxide, an odorless
and deadly gas.
· DO NOT let hoses come in contact with very hot engine
muffler during or immediately after use of your pressure
washer. Damage to hoses from contact with hot engine
surfaces will NOT be covered by warranty.
CAUTION: NEvER pull water supply hose to move pressure washer.
This could damage hose and/or pump inlet.
· DO NOT use hot water, use cold water only.
· NEvER turn water supply off while pressure washer engine is
running or damage to pump will result.
· DO NOT stop spraying water for more than two minutes at a time. Pump operates in bypass
T
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.
. 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.
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 0 PSI.
U
WARNING: To reduce the possibility of contamination always pro-
tect against backflow when connected to a potable water system.
6. Connect high-pressure hose (C) to pump
outlet.
C
7. If applying a chemical or cleaning solution,
refer to Chemicals and Cleaning
Solvents.
8. Turn the water source on.
CAUTION: Risk of property damage. Failure
V
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. Start engine. Refer to the engine instruction manual for correct
procedure.
WARNING: Risk of unsafe operation. 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.
11. Depress trigger on gun to start water flow.
WARNING: Risk of unsafe operation. Stand on a stable
surface and grip gun/wand firmly with both hands. Expect the gun to
kickback when triggered.
1
1. Release trigger to stop water flow.
DANGER: Risk of injury from spray. Engage the trigger lock (W) when gun is not in use to prevent
W
accidental spraying.
13. 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.
CAUTION: Risk of property damage Failure to do so could cause damage to the
pump.
. Turn engine off. Refer to the engine instruction manual.
CAUTION: Risk of property damage. NEvER turn water supply off while pressure
washer engine is running or damage to pump will result.
3. Turn water source off. 4. Pull trigger on spray gun to relieve any water
pressure in hose or
spray gun.
5. Refer to Storage for proper storage procedures.
MAInTenAnce
WARNING: Risk of burning. When performing maintenance, you may be exposed to
hot surfaces, water pressure or moving parts that can cause serious injury or
death.
WARNING: Risk of fire. Always disconnect, spark plug wire, let the engine cool
and release all water pressure before performing any maintenance or repair.
The engine contains flammable fuel. Do not smoke or work near open flames
while performing maintenance.
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 frequent maintenance checks will be required.
engine
Consult the engine instruction manual for the manufacturer’s recommendations
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.
1. Change pump oil after the first 10 hours of operation and every 50 hours
thereafter.
TO CHECK OIL
1. The oil level should come to the dot in the middle of the sight glass (X).
HOW TO CHANGE
H
PUMP OIL
1. Loosen pump dipstick/oil
plug (H).
X
. Place a container under
the oil drain plug (Y).
3. Remove pump oil drain
plug.
Y
4. After oil is drained, replace
oil drain plug. Tighten securely.
5. Remove pump dipstick/oil plug and fill with 14 oz. (414 ml) of
DP70 pump oil. If DP70 is not available use 30W non-detergent
oil.
13
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.
. Pull trigger on gun handle to relieve any water pressure.
3. Disconnect the spray wand from the gun. 4. Remove the high-pressure nozzle from
Z
the spray wand. Remove any obstructions
with the nozzle cleaning tool (Z) 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
end and removing it from water inlet of pump.
U
. 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.
U
To remove Tires
1. Using a 1/8″ hex head wrench loosen set screw in hub collar.
. 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/winterizer, such as DP80
when storing the unit for more than 30 days and/or when freezing temperatures
are expected. DP80 is availabe at the store where the pressure washer was
purchased. If a pump protector/ winterizer is not available, RV antifreeze or
windshield washer fluid needs to be run through the pump as outlined in the
steps below. NOTE: Using a pump protector/ winterizer, RV antifreeze or
windshield washer fluid is to provide proper lubrication to the internal seals
of the pump regardless of temperature or environment.
1. Obtain a funnel, 6 oz. (170 mL) of RV antifreeze or windshield washer
fluid, and 1636″ (4091cm) of garden hose with a male hose connector attached
to one end.
14
CAUTION: Risk of property damage. Use only Rv antifreeze. Any other antifreeze
is corrosive and can damage pump.
. Disconnect spark plug wire. 3. Connect length of garden hose to water inlet
of pump. 4. Add RV antifreeze or windshield
washer fluid to hose as shown. 5. Pull engine starter rope slowly
several times until antifreeze/ washer fluid comes out of highpressure 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 highpressure hose, coil it and store it in cradle of
the pressure washer handle.
. 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.
4. If space is needed, handles may be removed and attached as shown.
CAUTION: Risk of personal injury. Avoid placing hands between handle and frame
when assembling to prevent pinching.
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 contact DEWALT Industrial Tool
Co., 701 East Joppa Road, Baltimore, MD 186, call 1-800-4-DEWALT
(1-800-433-958) or visit our website www.dewalt.com.
CAUTION: 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 DEWALT factory service center, a DEWALT authorized
service center or other qualified service personnel. Always use identical
replacement parts.
Limited Warranty
DEWALT pressure washers are warranted for one year from the date of purchase.
DEWALT will repair, without charge, any defects due to faulty materials or
workmanship. For further detail of warranty coverage and warranty repair
information, visit www.dewalt.com or call 1-800-4-DEWALT (1-800-433-958). 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 in certain states or
provinces. The product’s engine is covered by the engine manufacturer’s
warranty.
15
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 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 1-800-4-DEWALT for a free replacement.
16
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. 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 0 PSI and 5
gallons per minute.
17
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 DEWALT technician or your dealer.
Problem
Code
Engine will not start …………………………………………………………………………………………1, , 3, 4, 5, 6, 7, 8
(refer to the engine’s instruction manual for further engine troubleshooting)
No or low pressure (initial use) ………………………………………………………………………….9, 10, 11, 1, 13, 14, 15, 16
Will not draw chemicals…………………………………………………………………………………….16, 17, 18, 19, 0, 1
No or low pressure (after period of normal use)………………………………………………….., 3, 4
Water leaking at gun/spray wand connection ………………………………………………………5, 6
Water leaking at pump ……………………………………………………………………………………..5, 6, 7, 8
Oil leaking at pump…………………………………………………………………………………………..9, 30, 31, 3, 33, 34, 35
Pump Pulsates ………………………………………………………………………………………………..1
18
CODE 1 3
4 5 6 7
8 9 10 11 1 13 14
15 16
Troubleshooting codes
POSSIBLE CAUSE
POSSIBLE SOLUTION
No fuel.
Add fuel.
Low oil.
Add required amount of oil.
Pressure builds up after two pulls on the recoil starter or after initial use.
Squeeze gun trigger to relieve pressure.
Choke lever in the NO CHOKE position.
Move choke to the CHOKE position.
Spark plug wire not attached. Engine ON/OFF switch in OFF position. 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. Fuel valve closed. Spray wand not
in high pressure. Low water supply. Leak at high-pressure hose fitting. Nozzle
obstructed. Water filter screen clogged. Air in hose.
Choke lever in the CHOKE position. High-pressure hose is too long.
Attach spark plug wire. Place engine ON/OFF switch in ON position.
Move choke to the NO CHOKE position.
Move the fuel valve lever to the OPEN position. See Spray Wand Nozzles under
Operation. Water supply must be at least 5 GPM @ 0 PSI. Repair leak. Apply
sealant tape if necessary. See Nozzle Cleaning under Maintenance. Remove and
clean filter. Turn off the engine, then the water source. Disconnect the water
source from the pump inlet and turn the water source on to remove all air from
the hose. When there is a steady stream of water present, turn water source
off. Reconnect water source to pump inlet and turn on water source. Squeeze
trigger to remove remaining air. Move choke to the NO CHOKE position. Use
high-pressure hose under 100 feet (30.48 m). Lengthen water supply hose
instead of high-pressure hose.
19
(Troubleshooting codes cont.)
CODE 17 18 19
POSSIBLE CAUSE Spray wand not in low pressure. Chemical filter clogged. Chemical screen not in cleaning solution.
0
Chemical too thick.
1
Worn seal or packing.
Chemical build up in chemical injector.
3
Worn or obstructed valves.
4
Worn unloader piston.
5
Worn or broken o-ring.
6
Loose hose connection.
7
Piston packings worn.
8
Pump head or tubes damaged from freezing.
9
Oil seals worn.
30
Loose drain plug.
31
Worn drain plug o-ring
3
Worn fill plug o-ring.
33
Pump overfilled.
34
Incorrect oil used.
35
Vent plug is clogged.
POSSIBLE SOLUTION See Spray Wand Nozzles under Operation. Clean filter. Make
sure end of chemical hose is fully submerged into cleaning solution. Dilute
chemical. Chemical should be the same consistency as water. Have parts cleaned
or replaced by authorized service center. Have replaced by an authorized
service center. Have replaced by authorized service center. Have replaced by
authorized service center. Check and replace. Tighten. Have replaced by
authorized service center. Have replaced by authorized service center. Have
replaced by authorized service center Tighten. Check and replace. Check and
replace. Check for correct amount. Drain and fill with correct amount and type
of oil. Clean vent plug; blow air through it to remove any blockage. If
problem persists, replace plug.
0
DEWALT Industrial Tool Co., 701 Joppa Road, Baltimore, MD 186
(MAR06)
Form No. A16411 DP3400 Copyright © 005, 006 DEWALT
The following are trademarks for one or more DEWALT power tools: the yellow and black color scheme; the “D” shaped air intake grill; the
array of pyramids on the handgrip; the kit box configuration; and the array of lozenge-shaped humps on the surface of the tool.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>