Simpson MS31025H User manual

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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, and birth defects or other reproductive harm. In
addition, some cleaning products and dust contain chemicals known to the State
of California to cause cancer, and birth defects or other reproductive harm. Wash
hands after handling.
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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.
SAVE THESE INSTRUCTIONS
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 1/2" (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-venti-
lated 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' (1.2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 contain-
er, 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.
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4- ENG
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 or near a location
occupied by humans or animals.
• Some cleaning fluids contain
substances which could cause injury
to skin, eyes or lungs.
• Use only cleaning fluids specifically rec-
ommended 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.
DONOT TREAT FLUID INJECTION
ASA SIMPLE CUT! See a physician
immediately!
• Inspect the high-pressure hose regularly.
Replace the hose immediately if it is
damaged, worn, has melted from
contacting the engine, or shows any signs
of cracks, bubbles, pinholes, or other
leakage. Never grasp a high-pressure
hose that is leaking or damaged.
• Never touch, grasp or attempt to cover a
pinhole or similar water leak on the high-
pressure hose. The stream of water IS
under high pressure and WILL penetrate
skin.
• Never place hands in front of nozzle.
• Direct spray away from self and others.
• Make sure hose and 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.
• 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 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.
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5- ENG
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 lockwhen 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.
• 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 children 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 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.
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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. Seri-
ous injury or death can result. Fuel or
oil leaks will damage carpet, paint or
other surfaces in vehicles or trailers.
• Oil could fill the cylinder and damage
the engine if the unit is not stored or
transported in an upright position.
•If pressure washer is equipped with a fuel
shut-off valve, turn the valve to the OFF
position before transporting to avoid fuel
leaks. If pressure washer is not equipped
with a fuel shut-off valve, drain the fuel
from tank before transporting. Only trans-
port fuel in an OSHA-approved container.
Always place pressure washer on a
protective mat when transporting to
protect against damage to vehicle from
leaks.
Always transport and store unit in an
upright position. Remove pressure
washer from vehicle immediately upon
arrival at your destination.
DANGER: 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 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.
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7- ENG
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 spray acids, gasoline, kerosene,
or any other flammable materials with this
product. Use only household detergents,
cleaners and degreasers recommended
for use with pressure washers.
• Wear protective clothing to protect
eyes and skin from contact with sprayed
materials.
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 using
the oil spout. 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 Owners 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 the
back of the unit.
2Connect High
Pressure Hose to
Pump
Thread the high pressure
hose to the pump outlet.
See Label #2 on the
back of the unit.
3Connect High
Pressure Hose to
Spray Gun
Thread 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 cou-
pler 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 Engine
Switch is turned
to the ON
Position
See Label #8 on the
side of the engine.
OFF
ON
9Verify the Choke
Pin is Pulled Out
to the CLOSED
Position
The Choke Pin has been
preset by the factory to be
in the CLOSED Position.
See Label #9 on the
side of the engine.
10 Pull the Recoil
Starter Grip
Pull the
recoil starter grip to
start the engine.
See Label #10 on the
side of the engine.
11 Push the Choke
Pin to the OPEN
Position
Gradually move the Choke
Pin to the OPEN Position
after engine starts.
See Label #11 on the
side of the engine.
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.
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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
C
B
E
1
D
H
A
K
I
J
L
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 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.
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11- ENG
G. Handle
H. Frame
I. Pump Outlet
J. Pump Inlet
K. Quick Connect Nozzles
L. Nozzle Holder
BASIC ELEMENTS OF AN ENGINE
Refer to the engine 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. 1– 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 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. Place the nozzle holder (L) onto the panel (located on the handle assembly)
and push each nozzle holder into place.
5. Remove colored quick connect nozzles (K) from plastic bag and insert them
into correct grommet on the nozzle holder. NOTE: Nozzles are color coded to
match colored nozzles on panel.
L
K
L
G
H
22A
6. Connect wand (E) to gun (D). Tighten securely.
7. Attach high pressure hose (C) to gun (D). Tighten securely.
E
4
D
C
3
D
NOTE: The pump on this unit is maintenance free and requires no oil. If
there is a problem with the pump, contact our Customer Service Group on
www.simpsoncleaning.com as soon as possible.
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12- ENG
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.
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 (P): When the temperature inside the pump 5P
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 meth-
ods.
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 How To Use Spray Wand.
NOTICE: DO NOT attempt to increase pump pressure. A higher pressure setting
than the factory set pressure may damage pump.
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 location and spray pattern. Refer to the following
chart to choose the correct nozzle for the job to be performed.
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.
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13- ENG
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). 6
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 snap ring is fully
engaged (forward) before squeezing gun trigger.
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˚ intense cleaning of
larger areas metal, concrete or wood
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.
*NOTICE: The high pressure spray from your pressure washer is capable of caus-
ing 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.
HOW TO APPLY CHEMICALS/CLEANING SOLVENTS (FIG. 7)
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.
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14- ENG
To Apply Chemicals:
1. Ensure detergent siphon hose (F, Figure 7) is F
7
attached 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 low pressure (black) nozzle into quick connect fitting of spray wand, see
How To Use Spray Wand paragraph in this section.
4. After use of chemicals, place detergent siphon hose into container of clean
water and draw clean water through chemical injection system to rinse sys-
tem 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. 8–11)
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 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!
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.
• Never run engine in doors or in en closed, poorly ven ti lat ed areas. En gine exhaust
con tains carbon mon ox ide, 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.
NOTICE: Risk of property damage. 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 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.
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15- ENG
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 Owners Manual for correct
procedure.
2. Check engine oil level. See Engine Owners 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 (M) is in water inlet of pump. NOTE: Cone side faces
out.
5. Connect water source (N) to pump inlet (J). NOTE: Water source must provide
a minimum of 5 gallons per minute at 20 psi.
6. Connect
high pressure hose (C) to pump outlet (I).
C
I
10
9
N
J
M
8
WARNING: To reduce the possibility of contamination always protect
against backflow when connected to a potable water system.
7. 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.
8. Turn water source on.
NOTICE: Risk of property damage. Failure to do so could cause damage to the
pump.
9. Remove all air from the pump and high pressure hose by depressing trigger
until a steady stream of water is present.
10. Start engine. See Engine Owners 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/spray wand firmly with both hands. Expect the gun to kick when
triggered.
12. Release trigger to stop water flow.
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16- ENG
WARNING: Risk of injury from spray. Always engage the 11
O
trigger lock (O) 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.
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 Owners 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
The pump was filled with oil at the factory. The pump on this unit is maintenance
free and requires no oil to be added or changed. If there is a problem with the pump
contact us at www.simpsoncleaning.com
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. 12)
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:
Please contact us for further information at www.allpartsinc.com

17- ENG
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 wand. 12 K
K
N
Remove any obstructions with the nozzle cleaning tool
provided and backflush with clean water.
5. Direct water supply (N) into spray wand 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. 8)
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: Cone side faces out.
NOTE: Do not operate the pressure washer without filter properly installed.
STORAGE
ENGINE
Consult the Engine Owners Manual for manufacturer’s recommendations for
storage.
PUMP
NOTICE: The manufacturer recommends using a pump protector/winterizer when
storing the unit for more than 30 days and/or when freezing temperatures are
expected. FREEZE DAMAGE IS NOT COVERED BY THE WARRANTY.
Pump protector/winterizer is usually available at the store where the pressure
washer was purchased. If a pump protector/winterizer is not available, RV
antifreeze needs to be run through the pump.
NOTE: Using a pump protector/winterizer or RV antifreeze is to provide proper
lubrication to the internal seals of the pump regardless of temperature or
environment.
PRESSURE WASHER
1. Drain all water from high pressure hose and wrap it onto hose wrap.
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.
Please contact us for further information at www.allpartsinc.com

18- ENG
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 MS31025H
PSI Max* 3100 psi
GPM Max* 2.5 gpm
High Pressure Hose 25 ft. (7.6 m)
Presure of Inlet Water 20–100 psi
Inlet Water cold tap
Soap Consumption Rate 10% max
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In our effort towards Continuous Improvement, specifications are subject to
change without notice.
SERVICE INFORMATION
Do not return this product to your retailer. Please contact our customer service
department at www.simpsoncleaning.com
LIMITED WARRANTY
90 DAY LIMITED WARRANTY ON PRODUCT COMPONENTS EXCLUDING PUMP
SIMPSON®warrants to the original purchaser that the wheels, gun, hose, wand, spray
nozzle(s) and other components of the SIMPSON®pressure washer covered under this
warranty are free from defects in material and workmanship for 90 days from the date
of purchase.
ONE YEAR LIMITED WARRANTY ON PUMP AND FRAME
SIMPSON® warrants to the original purchaser that the pump of the SIMPSON®
pressure washer covered under this warranty is free from manufacturer’s defects in
material and workmanship for one year from the date of purchase. The one year limited
warranty applies to the pump only.
SIMPSON® will repair or replace, at SIMPSON®'s option, products or components
which have failed within the above warranty periods. Service will be scheduled
according to the normal work flow and business hours at the service center location,
and the availability of replacement parts. All decisions of SIMPSON®with regard to this
limited warranty shall be final.
This warranty gives you specific legal rights, and you may also have other rights which
vary from state to state.
Please contact us for further information at www.allpartsinc.com

19- ENG
ENGINE WARRANTY
The engine warranty is covered under the terms and conditions as outlined by the
engine manufacture’s warranty contained herein and is sole responsibility of the engine
manufacturer.
RESPONSIBILITY OF ORIGINAL PURCHASER (INITIAL USER):
•To process a warranty claim on your SIMPSON®pressure washer, report the
concern to www.simpsoncleaning.com for authorization and direction to the
nearest authorized service centre in your area.
•Retain original cash register sales receipt as proof of purchase for warranty work.
•Use reasonable care in the operation and maintenance of the product as described
in the Owners Manual(s).
THIS WARRANTY DOES NOT COVER:
•Merchandise sold as reconditioned, used as rental equipment, or floor or display
models.
•Merchandise that has become damaged or inoperative because of ordinary wear,
misuse, cold, heat, rain, excessive humidity, freeze damage, use of improper
chemicals, negligence, accident, failure to operate the product in accordance
with the instructions provided in the Owners Manual(s) supplied with the product,
improper maintenance, the use of accessories or attachments not recommended
by SIMPSON®, or unauthorized repair or alterations.
•Repair and transportation costs of merchandise determined not to be defective.
•Costs associated with assembly, required oil, adjustments or other installation and
start-up costs.
•Expendable parts or accessories supplied with the product which are expected to
become inoperative or unusable after a reasonable period of use, including but not
limited to springs, nozzles, o-rings, washers, and similar accessories.
•Merchandise sold by SIMPSON®which has been manufactured by and identified
as the product of another company, such as gasoline engines. The product
manufacturer’s warranty, if any, will apply.
•ANY INCIDENTAL, INDIRECT OR CONSEQUENTIAL LOSS, DAMAGE,
OR EXPENSE THAT MAY RESULT FROM ANY DEFECT, FAILURE OR
MALFUNCTION OF THE PRODUCT IS NOT COVERED BY THIS WARRANTY.
Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you.
•IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM
THE DATE OF ORIGINAL PURCHASE. Some states do not allow limitations on
how long an implied warranty lasts, so the above limitations may not apply to you.
Please contact us for further information at www.allpartsinc.com

20- ENG
TROUBLE SHOOTING GUIDE
OPERATIONAL
ISSUE POSSIBLE CAUSE SOLUTION
Engine will
not start (see
Engine Manual
for further
engine
troubleshooting)
No fuel Add fresh fuel
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. Attach spark plug wire.
Engine switch in OFF
position Place engine switch in ON 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
Move choke to the "No Choke"
position
No or low
pressure
(initial use)
Spray wand not in
high pressure See How to Use Spray Wand instructions in the
Operation Section
Low water supply Water supply must be at
least 5 gpm @ 20 psi
Leak at high pressure
hose fitting Repair leak. Apply sealant tape if necessary
Nozzle obstructed See Nozzle Cleaning instructions
in the Maintenance section
Water filter screen
clogged Remove and clean filter.
No or low
pressure
(initial use)
Air in hose 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. Re-connect
water source to pump inlet and
turn on water source. Squeeze
trigger to remove remaining air
Choke in the
“Choke” position Move choke to the “No Choke” position
High pressure hose
is too long Use high pressure hose under 100 feet (30m)
Please contact us for further information at www.allpartsinc.com