DeWalt DPD3100 User manual

DPD3100
Pressure Washer
INSTRUCTION MANUAL
If you have questions or comments, contact us.
1-800-4-DEWALT • www.dewalt.com

2

A. Panel assembly
B. Nozzle holder
C. Professional Spray gun
D. Side Handle
E. Quick-connect
spray wand
F. Frame
G. Engine dipstick/oil plug
H. Engine switch
I. Starter grip
J. Engine
K. Choke control
L. Throttle control lever
M. Fuel valve lever
N. Gas cap
O. Handle assembly
P. High-pressure hose
Q. High-pressure pump
DPD3100 PRESSURE WASHER

Refer to the engine instruction manual for location and operation of
other engine controls.

DeWALT MAINTENANCE FREE DESIGN
The high pressure pump is maintenance free and requires no oil. If
there is a problem with the pump contact a DeWALT factory service
center, a DeWALT authorized service center or other qualified service
personnel.
FIG. 1
J
C
E
P
K
O
A
F
B
Q
H
G
N
L
M
I
D

3

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)

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 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.

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.

MODEL WEIGHT HEIGHT WIDTH LENGTH PSI MAX* AVERAGE
OPERATING
PSI
GPM MAX* AVERAGE
OPERATING
GPM
ENGINE
DPD3100 83.6 lbs 26.5" 23" 40" 3100
(21373 kPa) 2780 (19167 kPa) 2.8
(10.6 L/min)
2.7
(10.3 L/min)
DeWALT
196 cc OHV,
5.5 Net HP, 6.5
Gross HP **
* Maximum PSI and GPM ratings determined in accordance with the Pressure Washers Manufacturers Association (PWMA)
standard PW101
** Horsepower rating (shown as maximum output @ 3600 rpm) is in accordance with SAE J1349 for Net HP and SAE J1995 for Gross HP.
Actual engine power will be lower. Engine power depends on the application, operating speed, operating conditions and other variables.

4

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 BY TRAINED
OPERATORS.
WARNING: This product may not be equipped with a spark-
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
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, known to the
State of California to cause cancer, and birth defects or other
reproductive harm.Wash hands after handling.

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 pres-
sure 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 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operatepressure
washer in an area containing
dry brush or weeds.

5

 • 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, 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.
 • 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: RISKTO 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 garag-
es, basements, etc.
 • Neveroperateunitina
location occupied by
humans or animals.
DANGER: RISKTO BREATHING (ASPHYXIATION) CONTINUED
 • 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.
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.

6

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 FLUID INJECTION AND LACERATION
CONTINUED
 • 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!
 • 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.
 • 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 mainte-
nance 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.

7

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oper-
ation 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.
 • 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.

8

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 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.
Remove pressure washer
from vehicle immediately upon
arrival at your destination.
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.

9

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.
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 seri-
ous 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.



10



1. Place handle assembly (O) onto frame, depress
F
O
the snap buttons, and slide the handle assembly
onto the frame (F) until snap buttons are secured
in place.
CAUTION: Risk of personal injury. Avoid placing
hands between handle and frame when assembling
to prevent pinching.
2. Attach high-pressure
E
P
hose (P) to spray gun.
Make sure it is
secure.
3. Connect wand (E) to
spray gun. Make sure
connection is secure.
4. Thread the side handle (D) into spray
D
gun extension and tighten to desired
position.
5. Place the nozzle holder (B) onto the
panel assembly (A) and push each
nozzle holder into place.
6. Removethefivecoloredquick-connect
nozzles from the plastic bag and
insert them into
B
A
correct grommet on
the nozzle holder.
Nozzles are color
coded to match
colored nozzles on
panel assembly.
NOTE: The high pressure pump is maintenance free and requires
no oil, if there is a problem with the pump contact a DeWALT factory
service center, a DeWALT authorized service center or other qualified
service personnel.
WARNING: Risk of bursting. Use a tire pressure gauge to check the
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.


Thepressure setting ispreset at thefactory to achieveoptimumpres-
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.
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.
CAUTION: DO NOT attempt to increase pump pressure. A higher
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.

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.