Harbor Freight Tools Pressure Washer 99741 User Manual

1600 PSI  
PreSSure WaSher  
99741  
Set uP and OPeratIng InStructIOnS  
holster (10) not shown.  
distributed exclusively by harbor Freight tools .  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Visit our website at: http://www.harborfreight.com  
read this material before using this product.  
Failure to do so can result in serious injury.  
SaVe thIS manual.  
©
®
Copyright 2008 by Harbor Freight Tools . All rights reserved. No portion of this manual or any artwork  
contained herein may be reproduced in any shape or form without the express written consent of  
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing  
improvements, actual product may differ slightly from the product described herein. Tools required for  
assembly and service may not be included.  
For technical questions or replacement parts, please call 1-800-444-3353.  
 
nOtIce is used to  
address practices  
SaVe thIS manual  
Keep this manual for the safety warn-  
ings and precautions, assembly, operat-  
ing, inspection, maintenance and cleaning  
procedures. Write the product’s serial  
number in the back of the manual near the  
assembly diagram (or month and year of  
purchase if product has no number). Keep  
this manual and the receipt in a safe and  
dry place for future reference.  
not related to personal injury.  
cautIOn, without  
the safety alert  
symbol, is used to address  
practices not related to  
personal injury.  
general Pressure Washer Safety  
Warnings  
WarnIng read all safety  
ImPOrtant SaFetY  
InFOrmatIOn  
In this manual, on the labeling,  
and all other information provid-  
ed with this product:  
warnings and instructions.  
Failure to follow the warnings and  
instructions may result in electric  
shock, fire and/or serious injury.  
Save all warnings and  
instructions for future reference.  
this is the safety alert  
symbol. It is used to alert  
you to potential personal  
injury hazards. Obey all  
safety messages that  
Work area safety  
1. Keep work area clean and well lit.  
Cluttered or dark areas invite acci-  
dents.  
follow this symbol to avoid  
possible injury or death.  
2. Do not operate pressure washers in  
explosive atmospheres, such as in  
the presence of flammable liquids,  
gases or dust. Pressure washers  
create sparks which may ignite the  
dust or fumes.  
danger indicates  
a hazardous  
situation which, if not  
avoided, will result in death or  
serious injury.  
3. Keep children and bystanders away  
while operating a pressure washer.  
Distractions can cause you to lose  
control.  
WarnIng  
indicates a  
hazardous situation which, if  
not avoided, could result in  
death or serious injury.  
electrical safety  
1. Pressure washer plugs must match  
the outlet. Never modify the plug in  
any way. Do not use any adapter  
plugs with grounded pressure wash-  
ers. Unmodified plugs and match-  
cautIOn, used  
with the safety  
alert symbol, indicates a  
hazardous situation which, if  
not avoided, could result in  
minor or moderate injury.  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 3  
 
ing outlets will reduce risk of electric  
shock.  
use a pressure washer while you are  
tired or under the influence of drugs,  
alcohol or medication. A moment of  
inattention while operating pressure  
washers may result in serious per-  
sonal injury.  
2. Avoid body contact with grounded  
surfaces such as pipes, radiators,  
ranges and refrigerators. There is an  
increased risk of electric shock if your  
body is grounded.  
2. Use personal protective equipment.  
Always wear eye protection and thick  
rubber boots. Safety equipment such  
as dust mask, non-skid safety shoes,  
hard hat, or hearing protection used  
for appropriate conditions will reduce  
personal injuries.  
3. Do not expose pressure washers to  
rain or wet conditions. Water enter-  
ing a pressure washer will increase  
the risk of electric shock.  
4. Do not abuse the cord. Never use  
the cord for carrying, pulling or un-  
plugging the pressure washer. Keep  
cord away from heat, oil, sharp edges  
or moving parts. Damaged or entan-  
gled cords increase the risk of electric  
shock.  
3. Prevent unintentional starting. Ensure  
the switch is in the off-position before  
connecting to power source and/  
or battery pack, picking up or carry-  
ing the equipment. Carrying pres-  
sure washers with your finger on the  
switch or energizing pressure wash-  
ers that have the switch on invites  
accidents.  
5. gFcI PrecautIOnS  
Test GFCI (Ground Fault Circuit Inter-  
rupter) before each use as follows:  
a. Plug GFCI into power outlet and  
press reset button. Indicator  
should turn on.  
4. Do not overreach. Keep proper foot-  
ing and balance at all times. This  
enables better control of the pressure  
washer in unexpected situations.  
b. Press test button. Indicator should  
turn off.  
c. Press reset button again for use.  
Do not use if above test fails.  
The GFCI device does not protect  
against electrical shock due to con-  
tact with both circuit conductors or a  
fault in any wiring supplying the GFCI  
device.  
to allow gFcI unit to function  
properly, extenSIOn cOrdS  
muSt nOt be uSed with this  
pressure washer.  
5. Dress properly. Do not wear loose  
clothing or jewelry. Keep your hair,  
clothing and gloves away from mov-  
ing parts. Loose clothes, jewelry or  
long hair can be caught in moving  
parts.  
6. Only use safety equipment that has  
been approved by an appropriate  
standards agency. Unapproved  
safety equipment may not provide  
adequate protection. Eye protection  
must be ANSI-approved for the spe-  
cific hazards in the work area.  
Personal safety  
1. Stay alert, watch what you are do-  
ing and use common sense when  
operating a pressure washer. Do not  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 4  
 
Pressure washer use and care  
will ensure that the safety of the pres-  
sure washer is maintained.  
1. Do not use the pressure washer if  
the switch does not turn it on and off.  
Any pressure washer that cannot be  
controlled with the switch is danger-  
ous and must be repaired.  
Specific Pressure Washer Safety  
Warnings  
1. Maintain labels and nameplates on  
the equipment. These carry impor-  
tant safety information. If unreadable  
or missing, contact Harbor Freight  
Tools for a replacement.  
2. Disconnect the plug from the power  
source before making any adjust-  
ments, changing accessories, or  
storing pressure washers. Such pre-  
ventive safety measures reduce the  
risk of starting the pressure washer  
accidentally.  
2. Risk of injection or severe injury.  
Keep clear of Nozzle. Do not direct  
discharge stream at people or ani-  
mals. Keep the work area clear of all  
people and animals.  
3. Store idle pressure washers out of  
the reach of children and do not allow  
persons unfamiliar with the pressure  
washer or these instructions to oper-  
ate the pressure washer. Pressure  
washers are dangerous in the hands  
of untrained users.  
3. Use the right product for the right  
job. There are certain applications  
for which this product was designed.  
Do not use small equipment, tools, or  
attachments to do the work of larger  
industrial equipment, tools, or attach-  
ments. Do not use this product for a  
purpose for which it was not intend-  
ed.  
4. Maintain pressure washers. Check  
for breakage of parts and any other  
condition that may affect the pres-  
sure washer’s operation. If damaged,  
have the pressure washer repaired  
before use. Many accidents are  
caused by poorly maintained pres-  
sure washers.  
4. This product must continuously run  
with cold water only. Never use hot  
water. Dry running will cause serious  
damage to the seals. Make sure the  
water supply used for the Pressure  
Washer is not dirty, sandy, and does  
not contain any corrosive chemical  
products.  
5. Use the pressure washer, acces-  
sories etc. in accordance with these  
instructions, taking into account the  
working conditions and the work to  
be performed. Use of the pressure  
washer for operations different from  
those intended could result in a haz-  
ardous situation.  
5. To avoid electrical shock, never start  
and run the Pressure Washer in the  
rain. Never allow water to leak inside  
the Body of the Pressure Washer.  
Do not direct discharge stream at the  
Pressure Washer itself or at other live  
electrical equipment.  
Service  
Have your pressure washer serviced  
by a qualified repair person using  
only identical replacement parts. This  
6. Do not allow the GFCI Plug to be-  
come wet. Always place the GFCI  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 5  
 
Plug in a dry location and as far away  
as possible from the object being  
sprayed. Keep all electrical connec-  
tions dry and off the ground.  
of the unit to make sure ice has not  
formed. Do not store the unit any-  
where that the temperature will fall  
below 32° F (0° C). (See “Inspection,  
Maintenance, and Cleaning” section  
for proper storage procedures.)  
7. When using the Pressure Washer, al-  
ways maintain a firm grip on the Wa-  
ter Gun with both hands. Squeezing  
the Trigger of the Water Gun causes  
a kickback force.  
16. Do not feed already-pressurized wa-  
ter (Such as that from another pres-  
sure washer) into this washer.  
8. Do not pull or carry the Power Wash- 17. When dispensing detergent, apply  
er by its Power Cord, or pull the Cord  
around sharp corners or edges. Do  
not unplug the Power Washer by pull-  
ing on the Cord. Keep the Cord away  
from heated surfaces.  
the detergent to the cleaning area at  
low pressure only. Then, spray the  
detergent off the cleaning area by us-  
ing the adjustable Nozzle. NOTICE:  
Detergent dispensing only works  
when the spray wand is in the low-  
pressure position.  
9. Do not handle the GFCI Plug with wet  
hands.  
18. The high pressure water flow can  
damage the work surface if not used  
properly. Always test the spray in an  
open area first.  
10. Avoid unintentional starting. Make  
sure you are prepared to begin work  
before turning on the Pressure Wash-  
er.  
19. Never move the Pressure Washer by  
pulling on the High Pressure Hose.  
Use the Handle provided on the top  
of the unit.  
11. The work area should have adequate  
drainage to reduce the possibility of a  
fall due to slippery surfaces.  
12. This Pressure Washer is intended for  
outdoor residential use only.  
20. Never leave the Pressure Washer  
unattended when it is plugged into an  
electrical outlet. Turn off the Pres-  
sure Washer, and unplug it from its  
electrical outlet before leaving.  
13. Some chemicals or detergents may  
be harmful if inhaled or ingested.  
Use an ANSI approved respirator or  
mask whenever there is a chance  
that vapors may be inhaled.  
21. If water is leaking out of the Pressure  
Washer immediately shut off the unit.  
Unplug the Pressure Washer, and  
discharge all pressure before tighten-  
ing fittings or having repair work done  
by a qualified technician.  
14. Keep the High Pressure Hose con-  
nected to the Pressure Washer and  
Spray Gun while the system is pres-  
surized. Disconnecting the Pressure  
Hose while the unit is pressurized is  
dangerous, and may cause injury.  
22. People with pacemakers should  
consult their physician(s) before use.  
Electromagnetic fields in close prox-  
imity to heart pacemaker could cause  
15. Prior to starting the Pressure Washer  
in cold weather, check all of the parts  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 6  
 
pacemaker interference or pacemak-  
er failure.  
the hand, past hand injuries, nervous  
system disorders, diabetes, or Ray-  
naud’s Disease should not use this  
piece of equipment. If you feel any  
medical or physical symptoms related  
to vibration (such as tingling, numb-  
ness, and white or blue fingers), seek  
medical advice as soon as possible.  
23. WARNING: The brass components  
of this product contain lead, a chemi-  
cal known to the State of California  
to cause birth defects (or other repro-  
ductive harm). (California Health &  
Safety code § 25249.5, et seq.)  
2. Do not smoke during use. Nico-  
tine reduces the blood supply to the  
hands and fingers, increasing the risk  
of vibration-related injury.  
24. WARNING: Handling the cord on  
this product will expose you to lead,  
a chemical known to the State of  
California to cause cancer, and birth  
defects or other reproductive harm.  
Wash hands after handling. (Califor-  
nia Health & Safety Code § 25249.5,  
et seq.)  
3. Wear suitable gloves to reduce the  
vibration effects on the user.  
4. Use equipment with the lowest vibra-  
tion when there is a choice between  
different processes.  
25. The warnings, precautions, and in-  
structions discussed in this instruction  
manual cannot cover all possible con-  
ditions and situations that may occur.  
It must be understood by the operator  
that common sense and caution are  
factors which cannot be built into this  
product, but must be supplied by the  
operator.  
5. Include vibration-free periods each  
day of work.  
6. Grip gun as lightly as possible (while  
still keeping safe control of it). Let  
the equipment do the work.  
7. To reduce vibration, maintain the  
equipment as explained in this manu-  
al. If any abnormal vibration occurs,  
stop use immediately.  
Vibration Safety  
This equipment vibrates during use.  
Repeated or long-term exposure to  
vibration may cause temporary or  
permanent physical injury, particularly  
to the hands, arms and shoulders. To  
reduce the risk of vibration-related  
injury:  
SaVe theSe  
InStructIOnS.  
1. Anyone using vibrating equipment  
regularly or for an extended period  
should first be examined by a doctor  
and then have regular medical check-  
ups to ensure medical problems are  
not being caused or worsened from  
use. Pregnant women or people who  
have impaired blood circulation to  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 7  
 
to allow gFcI unit to function properly,  
extenSIOn cOrdS muSt nOt be  
uSed with this pressure washer.  
grOundIng  
tO PreVent  
electrIc ShOck  
and death FrOm  
Symbology  
IncOrrect grOundIng  
WIre cOnnectIOn:  
Double Insulated  
Check with a qualified  
Canadian Standards Association  
Underwriters Laboratories, Inc.  
electrician if you are in doubt  
as to whether the outlet is  
properly grounded. do not  
modify the power cord plug  
provided with the equipment.  
do not use the equipment if  
the power cord or plug is  
damaged. If damaged, have it  
repaired by a service facility  
before use. If the plug will not  
fit the outlet, have a proper  
outlet installed by a qualified  
electrician.  
Volts Alternating Current  
V~  
a
Amperes  
No Load Revolutions per Minute  
(RPM)  
n xxxx/min.  
0
1. Equipment marked “Double Insu-  
lated” does not require grounding.  
They have a special double insulation  
system which satisfies OSHA require-  
ments and complies with the applica-  
ble standards of Underwriters Labo-  
ratories, Inc., the Canadian Standard  
Association, and the National Electri-  
cal Code.  
2. Double insulated equipment may be  
used in either of the 120 volt outlets  
shown in the preceding illustration.  
(See Outlets for 2-Prong Plug.)  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 8  
 
e. disconnect water supply  
hose.  
SPecIFIcatIOnS  
120 V / 60 Hz / 13 A  
35 Ft. Long Power Cord  
Electrical Requirements  
note: For additional information regarding  
the parts listed in the following pages,  
refer to the Assembly Diagram near  
the end of this manual.  
Water Pressure  
Flow Rate  
1,600 PSI  
1.6 GPM  
Water Supply Required 3-4 gPm minimum  
Hose Length  
19 Ft.  
1. Check the Inlet Strainer for any block-  
age, including packaging debris. The  
Pressure Washer may be shipped  
with a plastic plug in the Inlet.  
2. Position the rear of the Handle above  
the rear of the Pressure Washer  
unPackIng  
When unpacking, check to make sure  
that the item is intact and undamaged. If  
any parts are missing or broken, please  
call Harbor Freight Tools at the number  
shown on the cover of this manual as soon  
as possible.  
body. Connect the Suction Tube from  
the top of the Pressure Washer body  
to the connector on the bottom of the  
Detergent Bottle in the Handle. Make  
sure that the Suction tube does not  
bend or get pinched during assembly.  
Lower the Handle onto the Pres-  
sure Washer Body. Then secure the  
Handle to the Pressure Washer body,  
using the Screws provided.  
aSSemblY  
read the entIre ImPOrtant  
SaFetY InFOrmatIOn  
3. Insert the Spray Wand into the Wa-  
ter Gun, and twist the Wand into the  
Extension until the Wand locks in  
place. Pull the Wand to make certain  
it is secure.  
section at the beginning of this  
manual including all text under  
subheadings therein before set  
up or use of this product.  
tO PreVent  
SerIOuS InjurY  
FrOm accIdental  
OPeratIOn:  
4. Attach the High Pressure Hose to the  
Outlet Port on the front of the Pres-  
sure Washer.  
before performing any  
inspection, maintenance, or  
cleaning procedures:  
5. Attach the female part of the Quick  
Connector Set to the Supply Port on  
the back of the Pressure Washer. At-  
tach the male part of the Quick Con-  
nector Set to a heavy-duty garden  
hose (not included). Then, pull back  
on the collar on the Female quick  
connector and insert the male Quick  
Connector.  
a. turn the Power Switch of  
the equipment to its “OFF”  
position.  
b. unplug the equipment from its  
electrical outlet.  
c. Shut off water supply.  
d. Safely discharge all residual  
water pressure.  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 9  
 
tors or a fault in any wiring supply-  
ing this device.  
cOntrOlS and SetuP  
note: Familiarize yourself with the loca-  
tion and function of all of the ma-  
chine’s controls before proceeding to  
setup of the machine.  
Should replacement of the gFcI  
Power Plug become necessary,  
only a qualified technician should  
perform the service.  
controls and features  
do not alter or disable the gFcI  
Power Plug.  
1. this item is equipped with a gFcI  
(ground Fault circuit Interruption)  
plug. read and follow these gFcI  
precautions:  
to allow gFcI unit to function  
properly, extension cords must not  
be used with this pressure washer.  
WarnIng! tO PreVent  
SPraY  
cOntrOl  
SleeVe  
PreSSure  
cOntrOl  
SleeVe  
electrIc ShOck and death:  
test gFcI (ground Fault circuit  
Interrupter) before each use as  
follows:  
IndIcatOr  
reSet  
buttOn  
FIgure b  
teSt  
buttOn  
2. The Spray Control Sleeve on the  
Spray Wand can be rotated for a  
range of spray patterns, from a full  
fan spray to a direct stream spray.  
Also, the Pressure Control Sleeve  
can be rotated clockwise for low-  
pressure spray and detergent appli-  
cation, or rotated counterclockwise  
for normal high-pressure spray.  
FIgure a  
3. The built-in Detergent Bottle located  
in the Handle allows the applica-  
tion (USING THE LOW PRESSURE  
SETTING ONLy) of pressure wash-  
ing detergent (not included) onto the  
work surface. The Pressure Washer  
will automatically mix the detergent  
and water. Note: Do not add water  
to the Detergent Dispenser.  
a. make sure the trigger is released  
and plug gFcI into power out-  
let. Press reset button. Indicator  
should turn on.  
b. Press test button. Indicator  
should turn off.  
c. Press reset button again for use.  
do not use if above test fails.  
the gFcI device does not protect  
against electrical shock due to  
contact with both circuit conduc-  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 10  
 
cautIOn! NEVER use any products not  
designed for pressure washer use,  
nor any products with chlorine or any  
caustic materials, including liquids  
containing solvents, trisodium phos-  
phate products, ammonia, or acid-  
based cleaners.  
pumpwillcavitate. Cavitationcausesthe  
pumptooperateloudlyandwilldamageit.  
2. ARRANGE FOR A PROPER ELEC-  
TRICAL SUPPLy. This unit uses  
a large amount of current, espe-  
cially during start-up. Turn off power  
switch, then connect this unit only to  
a dedicated household circuit capable  
of providing ample current to it. A  
dedicated circuit has no additional  
loads (running devices) connected to  
it; shut off any appliances that slow  
down or lights that dim while the  
washer is running. For best results,  
connect the plug to that circuit’s outlet  
that is nearest to the circuit breaker  
panel.  
Fill the Detergent Dispenser only  
when the unit is not running or  
plugged in.  
Setup  
1. CHECK THE WATER SUPPLy. Prior to  
using the Pressure Washer for the first  
time, it is ESSENTIAL to verify that the  
water supply is adequate. The Pres-  
sure Washer needs TWICE the water  
supply (or volume) than the stated  
water output (1.6 GPM). This Pres-  
sure Washer will need about 3-4 GPM  
to operate correctly and efficiently. If  
the water is being supplied by a well/  
pump, make certain that the well/pump  
produces enough water to keep up with  
the Pressure Washer’s water demands.  
Water supply hoses should be heavy  
3. MAKE SURE THE WASHER IS  
CLEAN AND READy FOR USE. En-  
sure the inlet water strainer, nozzle,  
and the rest of the Washer are com-  
pletely free of buildup or debris.  
4. PLAN OUT THE jOB: Plan out what  
areas will be cleaned, how many ses-  
sions will be necessary, and how long  
the individual sessions of work will  
need to be. Plan to clean the higher  
portions first, because the higher  
portions will typically remain cleaner  
while the other areas are cleaned.  
Plan a safe direction for runoff to  
flow while the job is being performed,  
and plan on working your way in that  
direction. you will have a clearer idea  
of the time involved to clean the area  
after doing a test run, as explained on  
page 14.  
duty to withstand the forces involved.  
5
Water hoses up to 25’ long must be / ”  
8
ID. Water hoses up to 50long must be  
3
/ ” ID. Do not use hoses longer than  
4
50’. The more minerals in the water  
(the harder the water) you use, the  
more often mineral buildup will need  
to be cleaned out from the nozzles.  
Flow rate of the water supply must nev-  
er be allowed to fall below 3 GPM.  
To determine the water supply’s flow  
rate: Run the water at full for one  
minute into a 5 gallon container, and  
measure the amount of water in the  
container.  
CAUTION! If the Pressure Washer is  
runwithaninadequatewatersupply, the  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 11  
 
5. PREPARE THE CLEANING AREA.  
Clear the cleaning area of all objects  
that are not being cleaned. If any  
water prone or delicate items cannot  
be moved, protect them. If detergent  
is to be used, cover or remove any  
plants or animals that may be dam-  
aged by the detergent.  
from any water from the cleaning  
area; select a location higher than  
the cleaning area. The pressure  
washer’s location should be close  
enough so that the hose will reach  
every portion of the job to be done  
with some slack for movement. Also,  
select an area with proper access to  
a dedicated circuit.  
6. PLACE THE PRESSURE WASHER  
IN AN APPROPRIATE LOCATION.  
The location should be protected  
properly with only part of the Wand  
installed.  
OPeratIOn  
read the entIre ImPOrtant  
SaFetY InFOrmatIOn  
section at the beginning of this  
manual including all text under  
subheadings therein before set  
up or use of this product.  
3. Connect the High Pressure Hose to  
the Pressure Washer. Make sure all  
connections are tight. Then, open  
the water supply valve fully. If leaks  
occur, shut off water and retighten  
connections.  
tO PreVent  
SerIOuS InjurY  
FrOm accIdental  
4. ImPOrtant! Prior to turning on  
the Pressure Washer, connect the  
unit to the water supply. turn on  
the water, disengage the safety,  
and squeeze the trigger until water  
flows out of the Water Gun. This  
removes air from the system and  
allows the unit to properly perform.  
Failure to follow this step can dam-  
age the Pump.  
OPeratIOn:  
turn the Power Switch of the  
equipment to its “OFF”  
position before performing  
any inspection, maintenance,  
or cleaning procedures.  
1. Attach the High Pressure Hose to  
the Port on the front of the Pressure  
Washer.  
5. Connect the GFCI plug and test it,  
as explained on page 10. Turn the  
Power Switch to the “ON” position.  
The motor will briefly run when the  
switch is first turned on to build  
up pressure and then go to standby  
until the trigger is squeezed.  
2. Attach the Water Gun into the Water  
Gun, and press and twist the Wand  
into the Extension until the Wand  
locks in place.  
nOte: The Pressure Washer will not  
pressurize if the Nozzle is not com-  
pletely assembled. It will not work  
nOte: The Motor does not run con-  
tinuously, but only when the Trigger is  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 12  
 
squeezed. If a humming noise per-  
sists while the motor is on stand-  
by, briefly discharge the nozzle in  
a safe direction.  
remain inside the unit, its High Pres-  
sure Hose, and the water inlet hose.  
Point the Water Gun in a safe direc-  
tion and discharge all remaining pres-  
sure. The high-pressure hose and  
water inlet hose can be disconnected  
after the pressure is released.  
6. Point the Nozzle in a safe direction  
and squeeze the Trigger. Switch  
the unit’s switch to the OFF posi-  
tion whenever the gun is not in use.  
Clean the area, following the tips con-  
tained in the Operating Tips section.  
9. Store the pressure washer and all ac-  
cessories according to the directions  
under Storage on page 16.  
7. When finished spraying turn the  
Power Switch to its “OFF” position,  
and turn off the water supply.  
WarnIng: do not disconnect the  
high-pressure hose or water in-  
let hose until all pressure is dis-  
charged safely.  
IF anY unexPected PrOblemS  
arISe, PleaSe reFer tO the  
trOubleShOOtIng SectIOn  
at the end OF thIS manual.  
8. ImPOrtant! When turning off  
the unit after use, high pressure will  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 13  
 
use Proper Pressure Washer  
Operation techniques:  
OPeratIng tIPS  
become Familiar With your  
machine:  
The machine may suddenly stop and  
require a rest period from time to  
time; this is normal and does not  
indicate a problem (See Trouble-  
shooting, page 20). However, cer-  
tain operating techniques may help  
reduce or even prevent the need for  
such rest periods, increasing effi-  
ciency:  
1. Before beginning work, set aside  
enough time to familiarize yourself  
with this machine’s cleaning rate  
and capacity along with all instruc-  
tions and precautions contained in  
this section, along with the Operating  
Instruction and Operating Controls  
sections.  
a. Do not release the trigger between  
sweeps. Release the trigger as few  
times as possible during use. In-  
terrupted or sporadic spraying will  
cause the unit to heat up quickly and  
will increase the need for rest peri-  
ods.  
2. This unit is intended for various light  
to moderate cleaning applications.  
If deeper cleaning is desired, it can  
be attained at times, however this is  
done at the expense of speed. This  
unit is not intended for paint stripping  
or deep concrete cleaning applica-  
tions.  
b. Make sure that all obstacles have  
been moved and the entire area is  
ready before starting.  
3. Clean a test area to satisfaction be-  
fore proceeding with the entire area,  
as stated in Cleaning Recommenda-  
tions.  
c. For small jobs, try to finish an entire  
portion of the job before taking a  
break.  
4. This unit has several settings and  
adjustments that effect the speed of  
cleaning and the water force applied  
to cleaning. Good guidelines to keep  
in mind are:  
cleaning recommendations  
1. Clean an inconspicuous test area  
to help avoid damaging the surface:  
Always begin with the fan spray at  
a distance of about 3-5 feet from  
the surface being cleaned to avoid  
damaging the surface of the object.  
Clear the test area of people and  
water-sensitive objects. If a pressure  
washing detergent is to be used, ap-  
ply the detergent to this area as well.  
After cleaning this area, switch off the  
pressure washer and inspect the area  
carefully for any damage or discolor-  
ation. If any damage is noted from  
the pressure setting, use a lighter  
setting when cleaning the rest of the  
area. If damage or discoloration is  
WIde Stream =  
quIcker cOVerage but  
lIghter cleanIng.  
narrOW Stream =  
deePer cleanIng but  
SlOWer cOVerage.  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 14  
 
noted from the detergent, do not use  
it when cleaning.  
mode and automatically shut off the  
soap dispenser for rinsing. Rinse off  
all detergent completely.  
2. First, pass over the area with a light  
cleaning, and then more thoroughly  
clean it.  
5. Hold the Water Gun at about a 45°  
angle and steadily sweep the stream  
back and forth; if a severe, head-on  
angle is used, dirt may imbed in the  
surface being cleaned. Follow a  
3a. For a vertical or sloped surface:  
a. Wash from the top down.  
steady, consistent pace during clean-  
ing; this will help prevent stripes or  
discoloration afterwards. If streaking  
or uneven cleaning is noted at the  
end of a project, go over the edges of  
the streaks with a wide fan pattern to  
help blend these lighter areas in.  
b. If possible, direct the stream in the  
same direction as the slope towards  
a draining area. This will enable  
better drainage and therefore better  
cleaning.  
3b. For a flat surface:  
a. If a thin layer of water accumulates  
on the surface, periodically use the  
stream to direct this water towards  
the drainage.  
6. If several different surfaces are to be  
cleaned, be careful not to damage  
any of the less solid surfaces while  
trying to clean the harder ones. This  
is especially a concern when cleaning  
tile and grout, bricks and mortar, or  
stones and mortar.  
b. After the major cleaning is done,  
sweep the surface with the stream to  
help direct loose debris toward the  
drainage.  
7. If wood is being cleaned, be careful  
not to damage it. Wood will usually  
require resurfacing (Sanding) and re-  
coat with a surface protectant (wood,  
stain, varnish) after it has dried. Try  
to avoid leaving water on a wooden  
surface; doing so can harm the sur-  
face.  
4. If detergent is to be applied: Only  
use pressure washing detergent; oth-  
er detergents will clog or damage the  
pressure washer. Apply the deter-  
gent at low pressure, by using the low  
pressure setting of the Spray Wand.  
Allow the detergent several minutes  
to sit and soak into the work surface;  
this will improve cleaning efficiency.  
Briefly shut off the unit and turn the  
Pressure Control Sleeve counter-  
clockwise to switch to high pressure  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 15  
 
further use. do not use damaged  
equipment.  
InSPectIOn, maIntenance,  
and cleanIng  
2. to clean, remove excess water from  
the Pump by tipping the unit to drain  
any remaining water from the inlet  
and outlet fittings. Drain the Deter-  
gent Dispenser and flush with run-  
ning water. Use only a clean cloth  
and mild detergent to clean the body  
of the Pressure Washer. Do not use  
solvents.  
Procedures not specifically  
explained in this manual  
must be performed only by a  
qualified technician.  
tO PreVent  
SerIOuS InjurY  
FrOm accIdental  
OPeratIOn:  
before performing any  
inspection, maintenance, or  
cleaning procedures:  
Do not immerse any part of the tool  
in liquid. Dry off any remaining water  
on all parts and fittings.  
Remove mineral deposits from the  
nozzle using a thin, stiff wire. The  
more minerals that are dissolved in  
the water (the harder the water) you  
use, the more often mineral buildup  
will need to be cleaned out from in-  
side nozzle.  
a. turn the Power Switch of  
the equipment to its “OFF”  
position.  
b. unplug the equipment from its  
electrical outlet.  
c. Shut off water supply.  
3. StOrage: When storing, empty  
the Pressure Washer of water. Frost  
will damage the Pressure Washer  
if the unit contains water. Store the  
Pressure Washer in a dry, frost-free  
room. Flush the unit with automotive  
antifreeze prior to long-term storage.  
Dispose of antifreeze according to  
local ordinances.  
d. Safely discharge all residual  
water pressure.  
e. disconnect water supply  
hose.  
tO PreVent SerIOuS  
InjurY FrOm PreSSure  
WaSher FaIlure:  
do not use damaged  
equipment. If abnormal noise  
or vibration occurs, have the  
problem corrected before  
further use.  
4.  
WarnIng! If the supply cord  
or plug of this pressure washer is  
damaged, it must be replaced only  
by a qualified service technician.  
1. before each use, inspect the general  
condition of the Pressure Washer.  
Check for loose screws, misalign-  
ment or binding of moving parts,  
damaged electrical wiring, damaged  
High Pressure Hose, damaged ac-  
cessories, and any other condition  
that may affect its safe operation. If  
abnormal noise or vibration occurs,  
have the problem corrected before  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 16  
 
lImIted 1 Year / 90 daY WarrantY  
Harbor Freight Tools Co. makes every effort to assure that its products meet high  
quality and durability standards, and warrants to the original purchaser that for a period  
of ninety days from date of purchase that the engine/motor, the belts (if so equipped),  
and the blades (if so equipped) are free of defects in materials and workmanship. Har-  
bor Freight Tools also warrants to the original purchaser, for a period of one year from  
date of purchase, that all other parts and components of the product are free from  
defects in materials and workmanship (90 days if used by a professional contractor or  
if used as rental equipment). This warranty does not apply to damage due directly or  
indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside our  
facilities, normal wear and tear, or to lack of maintenance. We shall in no event be liable  
for death, injuries to persons or property, or for incidental, contingent, special or con-  
sequential damages arising from the use of our product. Some states do not allow the  
exclusion or limitation of incidental or consequential damages, so the above limitation  
of exclusion may not apply to you. THIS WARRANTy IS ExPRESSLy IN LIEU OF ALL  
OTHER WARRANTIES, ExPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF  
MERCHANTABILITy AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with  
transportation charges prepaid. Proof of purchase date and an explanation of the com-  
plaint must accompany the merchandise. If our inspection verifies the defect, we will ei-  
ther repair or replace the product at our election or we may elect to refund the purchase  
price if we cannot readily and quickly provide you with a replacement. We will return re-  
paired products at our expense, but if we determine there is no defect, or that the defect  
resulted from causes not within the scope of our warranty, then you must bear the cost  
of returning the product.  
This warranty gives you specific legal rights and you may also have other rights  
which vary from state to state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
For technical questions, please call 1-800-444-3353;  
SKU 99741  
PAGE 17  
troubleshooting section at end of manual.  
 
PartS lISt  
PartS lISt  
Part  
description  
qty.  
1
Part  
20 O-ring  
description  
qty.  
1
1
2
3
4
5
6
7
8
9
Cap  
Screw  
2
21 Shaft  
1
Rear Handle  
Gasket  
1
22 Rear Housing  
23 GFCI Plug  
23a Power Cord  
24 Shock Absorber  
25 Motor/pump Assembly  
26 Clip Cover  
27 jacket  
1
1
1
Detergent Bottle  
Front Handle  
Screw  
1
1
1
4
12  
1
1
Tube  
1
Motor Housing  
1
1
10 Holster  
1
28 Wheel  
2
11 Screw  
9
29 Hubcap  
2
12 Screw  
2
30 Water gun  
30a Nozzle  
1
13 Power Switch  
14 Front Housing  
15 Screw  
1
1
1
31 High Pressure Hose  
1
Male Low Pressure  
Hose Connector  
4
32  
1
1
16 Switch  
1
Female Low Pressure  
Hose Connector  
33  
17 Capacitor  
1
18 Rear Switch Housing  
19 Front Switch Housing  
1
1
record Product’s Serial number here:  
note: If product has no serial number, record month and year of purchase instead.  
note: Some parts are listed and shown for illustration purposes only, and are not avail-  
able individually as replacement parts.  
PleaSe read the FOllOWIng careFullY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLy  
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLy. NEITHER THE MANUFACTURER OR  
DISTRIBUTOR MAKES ANy REPRESENTATION OR WARRANTy OF ANy KIND TO THE BUyER THAT  
HE OR SHE IS QUALIFIED TO MAKE ANy REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS  
QUALIFIED TO REPLACE ANy PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/  
OR DISTRIBUTOR ExPRESSLy STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD  
BE UNDERTAKEN By CERTIFIED AND LICENSED TECHNICIANS, AND NOT By THE BUyER. THE  
BUyER ASSUMES ALL RISK AND LIABILITy ARISING OUT OF HIS OR HER REPAIRS TO THE  
ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER  
INSTALLATION OF REPLACEMENT PARTS THERETO.  
For technical questions, please call 1-800-444-3353;  
SKU 99741  
PAGE 18  
troubleshooting section at end of manual.  
 
aSSemblY dIagram  
23a  
30a  
note: Parts 32 and 33, Low Pressure  
Hose Connectors, are not shown.  
For technical questions, please call 1-800-444-3353;  
troubleshooting section at end of manual.  
SKU 99741  
PAGE 19  
 
trOubleShOOtIng  
Shut off the Pressure Washer, release all pressure in a safe  
manner, and disconnect it from power and water before adjusting,  
cleaning, or repairing the unit.  
Pressure Washer Stops Suddenly  
the thermal safety Switch may be  
tripped. Switch the unit off. allow the  
unit to rest for 20-30 minutes and retry.  
unIt OPerateS  
nOrmallY aFter  
unIt dOeS nOt  
reStart  
reStIng  
the following points should  
be applied to help reduce the  
frequency of rest periods:  
check the indicator on the gFcI  
power plug (explained under Controls  
and Features, #1 on page 10).  
1. eliminate any extension cord used.  
2. use proper operating techniques.  
review the Operating tips section,  
starting on page 14.  
IndIcatOr dOeS  
IndIcatOr  
3. Verify that this unit is being supplied  
with the correct voltage, see page 11,  
#2. connect the plug to the outlet  
nearest the circuit breaker panel and  
remove any other loads that may be  
on the circuit.  
nOt aPPear  
aPPearS  
make sure unit is  
totally dry, then  
dry self thoroughly  
and check the  
press reset button.  
circuit breaker on  
If gFcI continues  
your household  
to trip, contact  
panel.  
a certified  
electrician.  
breaker  
nOt trIPPed  
breaker trIPPed  
check for electrical shorts.  
If none are found, reset  
breaker.  
contact  
qualified  
technician.  
If breaker continues to  
trip, try another circuit  
or contact a certified  
electrician.  
Water leaking from within the housing  
Seals may be worn or damaged.  
leaking water creates a shock hazard.  
ImmedIatelY discontinue use. have the unit repaired  
by a qualified technician before further use.  
If the steps above do not solve the problem or if the repairs involved are  
too complex, contact a qualified technician.  
SKU 99741  
For technical questions, please call 1-800-444-3353.  
PAGE 20  
 
troubleshooting (continued)  
Shut off the Pressure Washer, release all pressure in a safe  
manner, and disconnect it from power and water before adjusting,  
cleaning, or repairing the unit.  
Pressure Washer will not start  
dry self thoroughly and check the voltage  
at the outlet, and press the reset button  
on the gFcI power plug (explained under  
Controls and Features, #1 on page 10).  
POWer SuPPlY  
adequate and reSet  
buttOn Set PrOPerlY  
POWer SuPPlY  
Inadequate  
reSet buttOn nOt  
Set cOrrectlY  
If the power switch is in the  
On position the thermal  
safety Switch may be  
tripped. Switch the unit off  
and allow the unit to rest for  
20-30 minutes and retry.  
Have a certified  
electrician correct  
the problem.  
Setup the gFcI plug  
as explained on  
page 10.  
Pressure washer does not build pressure  
check that hose is unbent and  
Inlet Screen is free from debris  
and deposits.  
hOSe IS kInked  
Or Screen IS  
clOgged  
hOSe IS nOt kInked and  
Screen IS clean  
clean Screen and  
straighten hose.  
Switch to a shorter  
hose, if possible.  
air may be getting in the  
water supply hose, check  
all connections.  
cOnnectIOnS  
are lOOSe  
all cOnnectIOnS  
are tIght  
Internal valves, seals,  
or the nozzle may be  
worn, contact a qualified  
technician.  
retighten  
connections.  
If the steps above do not solve the problem or if the repairs involved are  
too complex, contact a qualified technician.  
SKU 99741  
For technical questions, please call 1-800-444-3353.  
PAGE 21  
 
troubleshooting (continued)  
Shut off the Pressure Washer, release all pressure in a safe  
manner, and disconnect it from power and water before adjusting,  
cleaning, or repairing the unit.  
Pressure changes during use  
air may be getting in the water supply  
hose, check all connections.  
cOnnectIOnS  
are lOOSe  
all cOnnectIOnS  
are tIght  
retighten  
connections.  
check that tip is free from  
debris and deposits.  
tIP IS  
clean  
tIP IS  
dIrtY  
Internal valves or seals  
may be worn or sticking,  
contact a qualified  
technician.  
clean tip.  
detergent will not dispense  
Verify that proper type of pressure  
washer detergent is being used and  
that the low pressure setting is being  
used, see pages 10-11, #3.  
nOn-PreSSure  
WaSher detergent  
uSed  
cOrrect detergent  
and SettIngS  
uSed  
IncOrrect  
SettIng uSed  
Set up the washer as  
explained on page  
10.  
remove the handle and  
check that the suction tube  
is not bent or pinched.  
remove the handle  
and thoroughly rinse  
out the detergent  
bottle and passages.  
Refill with correct  
detergent.  
If the steps above do not solve the problem or if the repairs involved are  
too complex, contact a qualified technician.  
SKU 99741  
For technical questions, please call 1-800-444-3353.  
PAGE 22  
 
troubleshooting (continued)  
Shut off the Pressure Washer, release all pressure in a safe  
manner, and disconnect it from power and water before adjusting,  
cleaning, or repairing the unit.  
Problem: There is no water coming out of the spray gun when the pump is run-  
ning and trigger is depressed.  
cause: Hard water deposits (calcium) has built up inside the small orifices block-  
ing the water from entering the pump.  
Solution: Unplug the unit, lay the unit face down, fill pump at the water inlet  
fitting with calcium remover (such as CLR) and allow at least 5 hrs for calcium  
deposit to break down.  
REV 08h  
If the steps above do not solve the problem or if the repairs involved are  
too complex, contact a qualified technician.  
SKU 99741  
For technical questions, please call 1-800-444-3353.  
PAGE 23  
 

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