Simpson ALH4240 User manual

Part No. 7107211 Rev. 1 JAN 2014
4200 PSI
4.0 GPM
PREMIUM PRESSURE WASHER
INSTRUCTION
MANUAL
MANUEL
D’UTILISATION
MANUAL DE
INSTRUCCIONES
MODEL
MODèLE
MODELO
ALH4240
If your pressure washer is not working properly or if there are parts missing or broken,
please DO NOT RETURN IT TO THE PLACE OF PURCHASE. Contact our Customer
Service Department at 1-877-362-4271 or www.simpsoncleaning.com
Si votre rondelle de pression ne travaille pas convenablement ou s'il y a des
parties manquant ou cassé, s'il vous plaît le PAS LE RETOURNE AU LIEU
D'ACHAT. Contacter notre département de service clients à 1-877-362-4271 o
www.simpsoncleaning.com
Si su lavadora a presión no trabaja correctamente ó encuentra partes rotas
ófaltantes, por favor NO LA REGRECE AL LUGAR DONDE LA COMPRO.
Contáctese con nuestro Departamento de Servicio al Cliente llamando al
1-877-362-4271 ou www.simpsoncleaning.com
IMPORTANT: Please make certain that the person who is to use this equipment carefully
reads and understands these instructions before operating.
IMPORTANT : Assurez-vous que toute personne qui utilisera cet équipement lise
attentivement ces instructions avant de l’utiliser.
IMPORTANTE: Aségurese por favor de que la persona que vaya a utilizar este equipo lea
con cuidado y comprenda estas instrucciones antes de operar.
VEA EL ESPAÑOL EN LA CONTRAPORTADA. INSTRUCTIVO DE OPERACIÓN,
CENTROS DE SERVICIO Y PÓLIZA DE GARANTÍA. ADVERTENCIA:
LÉASE ESTE INSTRUCTIVO ANTES DE USAR EL PRODUCTO.
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conServe eStaS inStruccioneS Para futuraS conSultaS
Please contact us for further information at www.allpartsinc.com

2- ENG
SAFETY GUIDELINES - DEFINITIONS
This manual contains information that is important for you to know and understand.
This information relates to protecting YOUR SAFETY and PREVENTING
EQUIPMENT PROBLEMS. To help you recognize this information, we use the
symbols below. 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.
NOTICE: Indicates a practice not related to personal injury which, if not avoided,
may result in property damage.
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.
• 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.
• Evenwhentheengineisusedcorrectly,COmayleakintoyourhome.ALWAYS use
abattery-poweredorbatterybackupCOalarminyourhouse.Read and follow all
directions for CO alarm before using. Ifyoufeelsick,dizzyorweakatanytime,
move to fresh air immediately. See a doctor. You could have carbon monoxide
poisoning.
WARNING: Do not operate this unit until you read this instruction manual and
the engine instruction manual for safety, operation and maintenance instructions. If
you have any questions regarding the product, please contact our customer
service department at www.simpsoncleaning.com.
DANGER: Risk of injection or severe injury. Keep clear of nozzle. Do not
direct discharge stream at persons or live animals. This product is to be used
only by trained operators.
WARNING: This product and its exhaust contain chemicals known to the State
of California to cause cancer, birth defects or other reproductive harm. In addition,
some cleaning products and dust contain chemicals known to the State of
California to cause cancer, birth defects or other reproductive harm. Wash hands
after handling.
Please contact us for further information at www.allpartsinc.com

3- ENG
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.
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DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
• Spilled gasoline and it’s vapors can
becomeignitedfromcigarettesparks,
electrical arcing, exhaust gases 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spillingfuel.
Movepressurewasherawayfromfueling
areabeforestartingengine.
• Heatwillexpandfuelinthetankwhich
could result in spillage and possible
fireexplosion.
• Keepmaximumfuellevel1/2"(12.7mm)
below bottom of filler neck to allow for
expansion.
• Operatingthepressurewasherinan
explosiveenvironmentcouldresultin
afire.
• Operate and fuel equipment in well-
ventilated areas free from obstructions.
Equipareaswithfireextinguishersuitable
forgasolinefires.
• Materials placed against or near the
pressure washer can interfere with
itsproperventilationfeaturescausing
overheating and possible ignition of
thematerials.
• Neveroperatepressurewasherinanarea
containingdrybrushorweeds.
• Muffler exhaust heat can damage
painted surfaces, melt any material
sensitive to heat (such as siding,
plastic, rubber, vinyl or the pressure
hose,itself),anddamageliveplants.
• Alwayskeeppressurewasheraminimum
of4'(1.2m)awayfromsurfaces(suchas
houses, automobiles or live plants) that
could be damaged from muffler exhaust
heat.
• Improperly stored fuel could lead to
accidental ignition. Fuel improperly
secured could get into the hands of
childrenorotherunqualifiedpersons.
• StorefuelinanOSHAapprovedcontain-
er, in a secure location away from work
area.
• Use of acids, toxic or corrosive
chemicals, poisons, insecticides, or
any kind of flammable solvent with
this product could result in serious
injuryordeath.
• Donotsprayflammableliquids.
Please contact us for further information at www.allpartsinc.com

4- ENG
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
• Breathing exhaust fumes will cause
serious injury or death! Engine
exhaust contains carbon monoxide,
anodorlessanddeadlygas.
• Operate pressure washer in a well-
ventilated area. Avoid enclosed areas
suchasgarages,basements,etc.
• Never operate unit in or near a location
occupiedbyhumansoranimals.
• Some cleaning fluids contain
substanceswhichcouldcauseinjury
toskin,eyesorlungs.
• Use only cleaning fluids specifically rec-
ommended for high pressure washers.
Follow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nozzle.
• 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operation.
• Donotallowhosetocontactmuffler.
• Never attach or remove wand or hose
fittingswhilesystemispressurized.
• 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supplyandpullgun
triggeruntilwaterstopsflowing.
• Use only accessories rated equal to or
higher than the rating of the pressure
washer.
Please contact us for further information at www.allpartsinc.com

5- ENG
DANGER: RISK OF INJURY FROM SPRAY
WHAT CAN HAPPEN HOW TO PREVENT IT
• High-velocity fluid spray can cause
objectstobreak,projecting 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
washercouldleadtoseriousinjury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ation and
controls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compromisethesafetyfeaturesof
thisproduct.
• Do not operate machine with missing,
brokenorunauthorized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
cleaning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operatortosliporfallormisdirect
the spray. Improper control of gun/
wandcanresultininjuries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.
Please contact us for further information at www.allpartsinc.com

6- ENG
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.
Serious injury or death can result.
Fuel or oil leaks will damage carpet,
paintorothersurfacesinvehicles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pressurewasherisnotequipped
with a fuel shut-off valve, drain the fuel
fromtankbeforetransporting.Onlytrans-
portfuelinanOSHA-approvedcontainer.
 Always place pressure washer on a
protective mat when transporting to
protect against damage to vehicle from
leaks.
 Always transport and store unit in an
upright position. Remove pressure
washer from vehicle immediately upon
arrivalatyourdestination.
DANGER: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
• Spray directed at electrical outlets or
switches,orobjectsconnectedtoan
electricalcircuit,couldresultinafatal
electricalshock.
• Unpluganyelectricallyoperatedproduct
beforeattemptingtocleanit.Directspray
awayfromelectricoutletsandswitches.
DANGER: RISK OF CHEMICAL BURN
WHAT CAN HAPPEN HOW TO PREVENT IT
• Use of acids, toxic or corrosive
chemicals, poisons, insecticides, or
anykindofflammablesolventwiththis
productcouldresultinseriousinjuryor
death.
• Do not spray acids, gasoline, kerosene,
oranyotherflammablematerialswiththis
product.Useonlyhouseholddetergents,
cleaners and degreasers recommended
forusewithpressurewashers.
• Wear protective clothing to protect
eyes and skin from contact with sprayed
materials.
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7- ENG
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
engine exhaust components, could
resultinseriousburn.
• During operation, touch only the control
surfaces of the pressure washer. Keep
childrenaway from the pressurewasher
at all times. They may not be able to
recognizethehazardsofthisproduct.
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
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8- ENG
qUICk SETUp GUIDE
WARNING: To reduce the risk of injury, read the pressure washer instruction manual and
the engine instruction manual before operating pressure washer.
aInstall the Handle
Slide the handle
assembly onto
the frame and secure with
saddle bolts and knobs.
BAdd/Check Oil
The engine is
shipped without
oil. Before starting engine,
add the oil provided.
Check oil level prior to
each use. Refer to Engine
Owner’s Manual for
complete procedure.
cAdd Gasoline
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 Owner's Manual
for complete procedure.
qUICk START GUIDE
DANGER:
• Neverrunengineindoorsorinenclosed,poorlyventilatedareas.Engineexhaustcon-
tains carbon monoxide, an odorless and deadly gas.
• Riskoffluidinjectionandlaceration.Whenusingthehigh-pressure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.
1Connect Garden
Hose to Pump
Thread the garden
hose to the pump inlet.
See label #1 on unit.
2Connect High
Pressure Hose to
Pump
Connect the high pressure
hose to the pump outlet.
See label #2 on unit.
3Connect High
Pressure Hose to
Spray Gun
Connect the other end
of the high pressure
hose to the spray gun.
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9- ENG
4Connect Spray
Wand to Spray
Gun
Thread the spray wand into
the end of the spray gun.
5Connect QC
Nozzles to Spray
Wand
Pull quick connect
coupler back and insert
nozzle. Release quick
connect coupler and
twist nozzle to make sure
it is secure in coupler.
6Turn Water
Faucet
Completely On
Do not run the unit
without water supply
connected and turned on.
Use Cold Water Only.
7Release Air from
System
Release all air from
pump and high pressure
hose by depressing
trigger until a steady
stream of water is present.
Approximately 30 seconds.
30 S
8Verify the Fuel
Switch is in the
ON Position
See label #8 on unit.
9Verify the Engine
Switch is turned
to the ON
Position
See label #9 on unit.
OFF
ON
10 Move the Choke to
the CLOSED Position
See label #10 on unit.
WARNING: This Guide is not a substitute for reading the operator's manual. User must
read and understand operator's manual before using this product.
11 Pull the
Recoil Starter
Grip
Pull the recoil
starter grip to start
the engine.
See label #11 on unit.
12 Move the
Choke to the
OPEN Position
Gradually move
the Choke to the
OPEN Position after
engine starts.
See label #12 on unit.
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10- ENG
GET TO kNOW THE pRESSURE WASHER
NOTE: Photographs and line drawings used in this manual are for reference
only and do not represent a specific model.
Compare the illustrations with your unit to familiarize yourself with the location of
various controls and adjustments. Save this manual for future reference.
G
B
E
1
D
H
C K
I
J
A
L
M
BASIC ELEMENTS OF A pRESSURE WASHER (FIG. 1)
A. High Pressure Pump: Increases the pressure of the water supply.
B. Engine: Drives the high pressure pump. Refer to the Engine Owner's Manual
for location and operation of engine controls.
C. High Pressure Hose: Carries the pressurized water from the pump to the gun
and spray wand.
D. Spray Gun: Connects with spray wand to control water flow rate, direction and
pressure.
E. Quick-Connect Spray Wand: Allows the user to quickly change out high
pressure nozzles. See How To Use Spray Wand instructions in Operation
section.
F. Detergent Siphon Hose (not shown): Feeds cleaning agents into the pump to mix
with the water. See
How To Apply Chemicals/Cleaning Solvents instructions
in
Operation section.
G. Handle
H. Frame
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11- ENG
I. Pump Outlet
J. Pump Inlet
K. Quick Connect Nozzles
L. Nozzle Holder
M. Dial-N-Wash®Adjustable Pressure Regulator: Use the Dial-N-Wash to
increase and decrease the pressure. Refer to the Dial-N-Wash Adjustment
paragraph.
BASIC ELEMENTS OF AN ENGINE
Refer to the Engine Owner's Manual for location and operation of engine controls.
Choke Control: Opens and closes carburetor choke valve.
Starter Grip: Pulling starter grip operates recoil starter to crank engine.
Engine Switch: Enables and disables ignition system.
ASSEMBLY INSTRUCTIONS (FIG. 2–4)
1. Locate and remove all loose parts from the carton.
2. Cut four corners of the carton from top to bottom and lay the panels flat.
3.
Slide the handle assembly (G) onto
G
H
22A K
K
L
L
the frame (H) and secure with saddle
bolts and knobs.
NOTICE: Risk of personal injury. Avoid
placing hands between handle and frame
when assembling to prevent pinching.
4. Remove colored quick connect
nozzles (K) from plastic bag and insert them into the nozzle holder (L).
NOTE: Nozzles are color coded to match colored nozzles on panel.
5. Connect wand (E) to gun (D). Tighten securely.
6. Attach high pressure hose (C) to gun (D). Tighten securely.
E
4
D
C
3
D
NOTICE: The engine is shipped without oil. Before starting engine, add the oil
provided. Damage to the engine will occur if the engine is run without oil, this
damage will not be covered under warranty.
NOTICE: The high-pressure pump was filled with oil at the factory. Always check
oil level before using (refer to Maintenance for more information).
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12- ENG
OpERATION
pRESSURE WASHER TERMINOLOGY
PSI: Pounds per Square Inch. The unit of measure for water pressure. Also used
for air pressure, hydraulic pressure, etc.
GPM: Gallons Per Minute. The unit of measure for the flow rate of water.
CU: Cleaning Units. GPM multiplied by PSI equals CU.
Bypass Mode: Allows water to re-circulate within the pump when the gun trigger is
not pulled. This feature allows the operator to release the trigger gun and reposition
themselves without having to turn the engine off in between cleaning actions.
NOTICE: Allowing the unit to run for more than two minutes without the gun trigger
being pulled could cause overheating and damage to the pump. Do not let the
pressure washer run for more than two minutes in Bypass Mode. Turn off the engine
and relieve the pressure in the gun during these extended situations.
Thermal Relief Valve (Q, Fig. 5): When the temperature inside the 5
Q
pump rises too high, this valve will open and release a gush of
water in an effort to lower the temperature inside the pump. The
valve will then close.
Detergent Injection System: Mixes cleaners or cleaning solvents
with the water to improve cleaning effectiveness.
Water Supply: All pressure washers must have a source of water.
The minimum requirements for a water supply are 20 PSI and 5 Gallons Per Minute.
If your water source is a well, the garden hose length can only be 30ft. (9m) max.
WARNING: To reduce the possibility of contamination always protect
against backflow when connected to a potable water system.
pRESSURE WASHER OpERATING FEATURES
pRESSURE ADJUSTMENTS
The pressure setting is preset at the factory to achieve optimum pressure and
cleaning. If you need to lower the pressure, it can be accomplished by these
methods.
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. Use the Dial-N-Wash to increase and decrease the pressure. Refer to the
Dial-N-Wash Adjustment paragraph.
NOTICE: DO NOT attempt to increase pump pressure. A higher pressure setting
than the factory set pressure may damage pump.
DIAL-N-WASH ADJUSTMENT (FIG. 6, 7)
1. Choose the correct high pressure nozzle (0˚, 15˚, 25˚ or 40˚) for the job to be
performed. Refer to How To Use Spray Wand.
2. The Dial-N-Wash is shipped in the MAX pressure setting, the MAX pressure
bar is aligned with the arrow (R) on the collar as shown in Figure 6.
Rotating the Dial-N-Wash (M) counterclockwise until it stops places it in the
MIN pressure setting, the arrow (R) will align with the MIN pressure bar as
shown in Figure 7.
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13- ENG
7
R
M
6
R
Adjust the pressure by rotating the
Dial-N-Wash (M) clockwise for
higher pressure or
counterclockwise for lower
pressure, aligning the arrow with
the desired pressure bar on the
Dial-N-Wash.
NOTE: To apply chemicals the black low pressure nozzle must be installed and
the Dial-N-Wash must be in the MAX pressure setting.
HOW TO USE SpRAY WAND
The nozzles for the spray wand are stored in the nozzle holder on the panel assembly.
Colors on the panel identify nozzle 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 spot cleaning
of hard, unpainted
surfaces or for
high reach areas
unpainted metal
or concrete;
DO NOT use on wood
Yellow
15˚ intense cleaning
of unpainted
hard surfaces
grills, driveways, concrete
or brick walkways,
unpainted brick or stucco
Green
25˚ standard cleaning
nozzle for most
applications
yard tools, sidewalks,
lawn furniture, unpainted
siding, stucco, gutters
and eaves, concrete,
brick surfaces
White
40˚ cleaning of painted
or delicate surfaces auto/RV, marine, wood, painted brick and stucco,
vinyl, painted siding
Black
low pressure applies cleaning
solutions Low pressure spray is safe on all
surfaces. Always verify
compatibility of cleaning
solution prior to use.
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14- ENG
*NOTICE: 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, and 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 the spray.
CHANGING NOzzLES ON SpRAY WAND (FIG. 8)
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 (E) back and insert nozzle (K). 8
KE
2. 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 quick-connect collar is fully engaged
(forward) before squeezing gun trigger.
HOW TO AppLY CHEMICALS/CLEANING SOLvENTS (FIG. 6, 9)
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:
1. Ensure detergent siphon hose (F, Figure 9) is attached
F
9
to barbed fitting location near high pressure hose
connection of pump as shown.
2. Place other end of detergent siphon hose with
filter on it into container holding chemical/cleaning
solution. NOTE: For every 7 gallons of water pumped
1 gallon of chemical/cleaning solution will be used.
3. Install the black low pressure nozzle into the quick connect fitting of the spray
wand and rotate the Dial-N-Wash (M) to the MAX pressure setting as shown in
Figure 6. See How To Use Spray Wand paragraph in this section.
NOTE: To apply chemicals the black low pressure nozzle must be installed and
the Dial-N-Wash must be in the MAX pressure setting as shown in Figure 6.
4. After use of chemicals, place detergent siphon 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 chemical residue will not be covered under warranty.
NOTE: Chemicals and soaps will not siphon if the black soap nozzle is not installed
on the spray wand.
STARTING (FIG. 10–13)
WARNING: To reduce the risk of injury, read the pressure washer instruction
manual and the engine instruction manual before starting pressure washer.
Please contact us for further information at www.allpartsinc.com

15- ENG
DANGER: Risk of fluid injection and laceration. When using the high
pressure 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!
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.
• Breathingexhaustfumeswillcauseseriousinjuryordeath!Engineexhaust
contains carbon monoxide, an odorless and deadly gas.
• Operate pressure washer in a well-ventilated area. Avoid enclosed areas
such as garages, basements, etc.
• Neveroperateunitinornearalocationoccupiedbyhumansoranimals.
WARNING: Risk of Fire, Asphyxiation and Burn. 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.
• 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.
NOTICE: Riskofpropertydamage.Neverpullwatersupplyhosetomovepressure
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modewhensprayguntriggerisnotpressed.Ifpumpisleftinbypass
mode for more than two minutes internal components of the pump can be
damaged.
If you do not understand these precautions, please contact our customer service
department at www.simpsoncleaning.com
Prior to starting, refer to your engine manual for proper starting 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 Owner's Manual for correct
procedure.
NOTICE: Useoffuelswithgreaterthan10%ethanolare
notapprovedforuseinthisproductperEPAregulations
andwilldamagetheunitandvoidthewarranty.
2. Check engine oil level. Refer to Engine Owner's Manual for correct procedure.
3. Check pump oil level. The oil level should come to the dot in the middle of the
sight glass. Refer to the Pump paragraph under Maintenance.
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16- ENG
4. 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.
5. Verify the filter screen (O) is in water inlet of pump. NOTE: Convex side faces
out.
6. Connect water source (N) to pump inlet (J). NOTE: Water source must provide
a minimum of 5 gallons per minute at 20 PSI.
7. Connect
high pressure hose (C) to pump outlet (I).
I
12
C
11
N
J
O
10
WARNING: To reduce the possibility of contamination always protect
against backflow when connected to a potable water system.
8. Choose the correct nozzle for the job to be performed. See How To Use spray
Wand instructions in this section. NOTE: If applying a chemical or cleaning
solution, see How To Apply Chemicals/Cleaning Solvents instructions in this
section.
9. Turn water source on.
NOTICE: Risk of property damage. Failure to do so could cause damage to the
pump.
10. Remove all air from the pump and high pressure hose by depressing trigger
until a steady stream of water is present.
11. Start engine. See Engine Owner's 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.
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.
12. Depress trigger on gun to start water flow.
WARNING: Risk of unsafe operation. Stand on a stable surface and
grip gun/spray wand firmly with both hands. Expect the gun to kick when
triggered.
13. Release trigger to stop water flow.
WARNING: Risk of injury from spray. Always engage 13
P
the trigger lock (P) when gun is not in use. Failure to do so
could cause accidental spraying.
SHUTTING DOWN
1. After each use, if you have applied chemicals, place
detergent siphon hose into container of clean water and
draw clean water through chemical injection system to
rinse system thoroughly.
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17- ENG
NOTICE: Risk of property damage. Failure to do so could cause damage to the
pump.
2. Turn engine off. See Engine Owner's Manual.
NOTICE: Risk of property damage. NEVER turn the water off with the engine
running.
3. Turn water source off.
4. Pull trigger on spray gun to relieve any water pressure in hose or spray gun.
NOTE: Failure to release system pressure will prevent removal of high pressure
hose from spray gun or pump connection.
5. See Storage section in this manual for proper storage procedures.
MAINTENANCE
WARNING: Risk of burn hazard. 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 hazard. 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 Owner's Manual for the manufacturer's recommendations
for any and all maintenance. NOTE: The engine drain plug is located at the rear of
the unit.
pUMp (FIG. 14)
NOTE: The Pump was filled with oil at the factory. The preferred oil is SIMPSON®
Premium Pump Crankcase Oil. If this oil is not available, an SAE 15W-40 oil may
be used. Change the pump oil after the first 50hours of operation and every 100
hours thereafter, or every 3 months.
TO CHECk OIL
Theoillevelshouldcometothedotinthemiddleofthe 14 BB AA
CC
sight glass (AA).
HOW TO CHANGE pUMp OIL
1. Loosen pump oil fill plug (BB).
2. Place a container under the pump oil drain
plug (CC).
3. Remove pump oil drain plug.
4. After oil is drained, replace pump oil drain plug. Tighten securely.
5. Refill pump using SIMPSON®Premium Pump Crankcase Oil. If this oil is not
available, an SAE 15W-40 oil may be used.
6. Replace pump oil fill plug and tighten securely.
If there is a problem with the pump contact us at www.simpsoncleaning.com
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18- ENG
CONNECTIONS
Connections on pressure washer hoses, gun and spray wand should be cleaned
regularly and lubricated with light oil or lithium grease to prevent leakage and
damage to the o-rings.
NOzzLE CLEANING (FIG. 15)
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. Remove the high pressure nozzle (K) from the spray 15 K
K
N
wand. Remove any obstructions with the nozzle cleaning
tool provided and backflush with clean water.
5. Direct water supply (N) into nozzle to backflush loosened
particles for 30 seconds.
6. Reassemble the nozzle to the wand.
7. Reconnect spray wand to gun and turn on water supply.
8. Start pressure washer and place spray wand into high
pressure setting to test.
CLEAN THE WATER INLET FILTER (FIG. 10)
This screen filter should be checked periodically and cleaned if necessary.
1. Remove filter by grasping end and removing it from water inlet of pump.
2. Clean filter by flushing it with water on both sides.
3. Re-insert filter into water inlet of pump. NOTE: Convex side faces out.
NOTE: Do not operate the pressure washer without filter properly installed.
STORAGE
ENGINE
Consult the Engine Owner's Manual for manufacturer’s recommendations for
storage.
PUMP
The manufacturer recommends using SIMPSON®/ POWERWASHER®Pump
Guard or equivalent when storing the unit for more than 30 days and/or when
freezing temperatures are expected. SIMPSON®/ POWERWASHER® Pump Guard
is environmentally friendly.
NOTE: Using pump guard helps provide proper lubrication to the internal seals of
the pump regardless of temperature or environment.
NOTICE: Risk of property damage. Use only SIMPSON® / POWERWASHER®
PumpGuardorequivalent.Otherproductscouldbecorrosiveand/orcontainalco-
hol which may cause pump damage.
pRESSURE WASHER
1. Drain all water from high pressure hose and wrap it onto hose wrap.
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19- ENG
2. Drain all water from the spray gun and wand by holding spray gun in a vertical
position with nozzle end pointing down and squeezing trigger. Store in gun
holder.
3. Wrap up and secure detergent siphon hose so it is protected from damage.
ACCESSORIES
DANGER: Risk of fluid injection. When using replacement spray wands or
guns with this pressure washer, DO NOT use a spray wand and/or spray gun/
wand combination that is shorter in length than what was provided with this
pressure washer as measured from the nozzle end of the wand to the gun
trigger.
NOTICE: The use of any other accessory not recommended for use with this tool
could be hazardous. Use only accessories rated equal to or greater than the rating
of the pressure washer.
SpECIFICATIONS
Model ALH4240
PSI Max* 4200 PSI
GPM Max* 4.0 gpm
High Pressure Hose 50 ft. (15.24 m)
Presure of Inlet Water 20–100 PSI
Inlet Water cold tap
Soap Consumption Rate 10% max
*RatedPressureandRatedWaterFlowiswithinmanufacturingtoleranceof
(+/- 10%).
In a continued commitment to improve quality, the manufacturer reserves the right
to make component changes, design changes, or specification changes when
necessary and without notice.
SERvICE INFORMATION
Do not return this product to your retailer. Please contact our customer service
department at www.simpsoncleaning.com
LIMITED WARRANTY
The manufacturer of this product agrees to repair or replace designated parts that
prove defective within the warranty period listed below at the manufacturer’s sole
discretion. Specific limitations/extensions and exclusions apply.
This warranty covers defects in material and workmanship and not parts failure
due to normal wear, depreciation, abuse, accidental damage, negligence, improper
use, maintenance, water quality or storage. To make a claim under the terms of
the warranty, all parts said to be defective must be retained and available for return
upon request to a designated Warranty Service Center for warranty inspection. The
judgments and decisions of the manufacturer concerning the validity of warranty
claims are final.
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20- ENG
These warranties pass through to the end user and are non-transferable. As a
factory authorized and trained Warranty Service Center, the factory will honor the
terms of all component warranties and satisfy claims of the appropriate warranty
provisions.
Normal wear items include, but are not limited to, valves and seals, which are not
covered by this warranty.
This warranty replaces all other warranties, express or implied, including without
limitation any warranties of merchantability or fitness for a particular purpose and
all such warranties are hereby disclaimed and excluded by the manufacturer. The
manufacturer’s warranty obligation is limited to repair and replacement of defective
products as provided herein and the manufacturer shall not be liable for any
further loss, damages, or expenses – including damages from shipping, accident,
abuse, acts of God, misuse, or neglect. Neither is damage from repairs using parts
not purchased from the manufacturer or alterations performed by non-factory
authorized personnel. Failure to install and operate equipment according to the
guidelines put forth in the instruction manual shall void warranty.
This warranty does not cover the following: machines used for rental purposes,
damage resulting from shipping (claims must be filed with freighter), accident,
abuse, act of God, misuse, or neglect. Neither is damage from repairs or
alterations performed by non-factory authorized personnel or failure to install and
operate equipment according to the guidelines put forth in the instruction manual.
The manufacturer will not be liable to any persons for consequential damage, for
personal injury, or for commercial loss.
WARRANTY DOES NOT AppLY TO FAILURES DUE TO:
• Freightdamage
• Damage due to chemical deterioration, scale build up, rust, corrosion or
thermal expansion
• Freezedamage
• Damage caused by parts or accessories not obtained from an authorized
dealer or not approved by the manufacturer.
• Normalwearofmovingpartsorcomponentsaffectedbymovingparts.
ENGINE
Covered by engine manufacturer warranty. See engine manual.
HIGH pRESSURE pUMp (DEFECTS IN MATERIAL AND WORkMANSHIp)
Two (2) years from date of purchase.
FRAME (DEFECTS IN MATERIAL AND WORkMANSHIp)
Ten (10) year from date of purchase.
OTHER COMpONENTS (DEFECTS IN MATERIAL AND WORkMANSHIp)
Includes nozzles, hoses, spray guns, wands, tires, feet
Ninety (90) days from date of purchase.
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