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9.801-190.0 - W 03/22/19
HPB
Operator’s Manual
Pressure Washer
98011900-1
MODELS:
HPB-392007A
1.109-109.0
HPB-353007A
1.109-110.0
HPB-353007B
1.109-111.0
HPB-353007C
1.109-112.0
To locate your local Kärcher Commercial
Pressure Washer Dealer nearest you,
visit www.karchercommercial.com
2 Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
Machine Data Label
3
Table of Contents
Machine Data Label . . . . . . . . . . . . . . . . . . . . . . . . . .2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . 4
Safety
Important Safety Information. . . . . . . . . . . . . . . . . . .5
Operations
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .10
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Operating Instructions. . . . . . . . . . . . . . . . . . . . . . .12
Detergents & General Operating Techniques. . . . .13
Thermal Pump Protection . . . . . . . . . . . . . . . . . . . .13
Cleaning Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Rinsing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Shutting down & Cleaning Up . . . . . . . . . . . . . . . . . 15
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
After Extended Storage. . . . . . . . . . . . . . . . . . . . . .16
Maintenance
Preventative Maintenance . . . . . . . . . . . . . . . . . . .17
Maintenance & Service . . . . . . . . . . . . . . . . . . . . . .17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . .22
Oil Change Record . . . . . . . . . . . . . . . . . . . . . . . . .22
Parts
Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Auto Start/Stop Option . . . . . . . . . . . . . . . . . . . . . 31
Float Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Auto Start/Stop Steam Option. . . . . . . . . . . . . . . . 36
Steam Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Hose & Spray Gun . . . . . . . . . . . . . . . . . . . . . . . . 39
UU1 Unloader Valve . . . . . . . . . . . . . . . . . . . . . . . 40
Wayne Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
KM.3 Series Pump . . . . . . . . . . . . . . . . . . . . . . . . 44
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
4
How To Use This Manual
This manual contains the following sections:
• How to Use This Manual
• Safety
• Operations
• Maintenance
• Parts List
The HOW TO USE THIS MANUAL section will tell you
how to find important information for ordering correct
repair parts.
Parts may be ordered from authorized dealers. When
placing an order for parts, the machine model and
machine serial number are important. Refer to the
MACHINE DATA box which is filled out during the
installation of your machine. The MACHINE DATA box
is located on the inside of the front cover of this manual.
The SAFETY section contains important information
regarding hazardous or unsafe practices of the
machine. Levels of hazards are identified that could
result in product damage, personal injury, or severe
injury resulting in death.
The OPERATIONS section is to familiarize the operator
with the operation and function of the machine.
The MAINTENANCE section contains preventive main-
tenance to keep the machine and its components in
good working condition. They are listed in this general
order:
• Storage
• Maintenance
• Troubleshooting
The PARTS LIST section contains assembled parts
illustrations and corresponding parts list. The parts lists
include a number of columns of information:
• REF – column refers to the reference number
on the parts illustration.
• PART NO. – column lists the part number for
the part.
• QTY – column lists the quantity of the part used
in that area of the machine.
• DESCRIPTION – column is a brief description
of the part.
• NOTES – column for information not noted by
the other columns.
NOTE: If a service or option kit is installed on your
machine, be sure to keep the KIT INSTRUCTIONS
which came with the kit. It contains replacement parts
numbers needed for ordering future parts.
NOTE: The manual part number is located on the
lower right corner of the front cover.
Model:
Date of Purchase:
Serial Number:
Dealer:
Address:
Phone Number:
Sales Representative:
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
5
Safety
Thank you for purchasing a Kärcher Pressure Washer.
We reserve the right to make changes at any time
without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of
the manufacturer’s operating instructions and warnings
before using this pressure washer. Warning information
should be emphasized and understood. If the operator
is not fluent in English, the manufacturer’s instructions
and warnings shall be read to and discussed with the
operator in the operator’s native language by the
purchaser/owner, making sure that the operator
comprehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’ instructions.
The operator must know how to stop the machine
quickly and understand the operation of all controls.
Never permit anyone to operate the engine without
proper instructions.
Save these Instructions
This manual should be considered a permanent part of
the machine and should remain with it if machine is
resold.
When ordering parts, please specify model and serial
number. Use only identical replacement parts.
This machine is to be used only by trained operators.
Important Safety Information
WARNING: To reduce the risk of
injury, read operating instruc-
tions carefully before using.
AVERTISSEMENT: Pour réduire
le risque de blessures, lire
attentivement les instructions
de fonctionnement avant l'utili-
sation.
1.Read the owner's manual thor-
oughly. Failure to follow instruc-
tions could cause malfunction of the machine and
result in death, serious bodily injury and/or property
damage.
2. Know how to stop the machine and bleed pressure
quickly. Be thoroughly familiar with the controls.
3. Stay alert — watch what you are doing.
4. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling distributor for specific details. If your
machine is rated 250 volts or less, single phase will
be provided with a ground fault circuit interrupter
(GFCI). If rated more than 250 volts, or more than
single phase this product should only be connected
to a power supply receptacle protected by a GFCI.
DANGER: Improper connection of the equipment-
grounding conductor can result in a risk of electro-
cution. Check with a qualified electrician or service
personnel if you are in doubt as to whether the
outlet is properly grounded. Do not modify the plug
provided with the product - if it will not fit the outlet,
have a proper outlet installed by a qualified electri-
cian. Do not use any type of adaptor with this
product
DANGER: Une mauvaise connexion du conducteur
de terre de l'équipement peut entraîner un risque
d'électrocution. Vérifier auprès d'un électricien
qualifié ou du personnel d'entretien si vous avez
des doutes quant à savoir si la sortie est correcte-
ment mise à la masse. NE PAS modifier la fiche
fournie avec le produit - si elle n'entre pas dans la
sortie, faire installer une sortie appropriée par un
électricien qualifié. NE JAMAIS utiliser un adapta-
teur avec ce produit.
DANGER: Keep wand, hose,
and water spray away from
electric wiring or fatal electric
shock may result.
DANGER: Garder la lance, le
boyau et le jet d'eau à l'écart de
tout câblage électrique ou des
chocs électriques mortels pour-
raient survenir
5.To protect the operator from
electrical shock, the machine must be electrically
grounded. It is the responsibility of the owner to
connect this machine to a UL grounded receptacle
of proper voltage and amperage ratings. Do not
spray water on or near electrical components. Do
not touch machine with wet hands or while
standing in water. Always disconnect power before
servicing.
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
OPERATIONS
SAFETY
MAINTENANCE
KEEP WATER
SPRAY AWAY FROM
ELECTRICAL WIRING.
WARNING
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
6
Safety
WARNING: Flammable liquids
can create fumes which can
ignite, causing property
damage or severe injury.
AVERTISSEMENT: Des liquides
inflammables peuvent produire
des vapeurs qui peuvent
s'enflammer, causant ainsi des
dommages à la propriété ou
des blessures graves.
WARNING: Risk of explosion — Operate only where
open flame or torch is permitted.
AVERTISSEMENT: Risque d'explosion — Utiliser
uniquement dans des endroits où l'utilisation d'une
flamme nue ou d'une torche est permise.
6. In oil burning models, use only kerosene, No. 1
home heating fuel, or diesel. If diesel is used, add a
soot remover to every tankful.
WARNING: Risk of fire — Do not
add fuel when the product is
operating or still hot.
AVERTISSEMENT: Risque
d'incendie — Ne pas ajouter de
carburant pendant que la
machine fonctionner ou est
encore chaude.
WARNING: Do not use gasoline
crankcase draining or oil
containing gasoline, solvents or alcohol. Doing so
will result in fire and/or explosion.
AVERTISSEMENT: Ne pas utiliser d'essence, de
drainage du carter de moteur ou d'essence
contenant de l'huile, de solvants ou de l'alcool. Agir
de la sorte risquerait de créer un incendie et/ou une
explosion.
7. Oil burning appliances shall be installed only in
locations where combustible dusts and flammable
gases or vapors are not present. Do not store or
use gasoline near this machine.
8. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
9. Never run pump dry or leave spray gun closed
longer than 1-2 minutes.
10. Keep operating area clear of all persons.
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne
and fly at high speeds. To avoid
personal injury, eye, hand and
foot safety devices must be
worn.
AVERTISSEMENT: Un jet haute
pression peut écailler la
peinture ou provoquer l'émis-
sion d'autres particules dans
l'air et leur projection à hautes vitesses. Pour éviter
les blessures corporelles, il faut porter des disposi-
tifs de sécurité pour les yeux, les mains et les pieds
11. Eye,hand,and foot protection must be worn when
using this equipment.
WARNING: This machine
exceeds 85 db appropriate ear
protection must be worn.
VERTISSEMENT: Cette machine
excède 85 dB et une protection
de l'ouïe appropriée doit être
portée.
WARNING: Hot discharge fluid.
Do not touch or direct
discharge stream at persons.
AVERTISSEMENT: Liquide de
décharge chaud. Ne pas diriger
le débit de décharge vers des
personnes
WARNING: This machine
produces hot water and must
have insulated components
attached to protect the operator.
AVERTISSEMENT: Cette machine produit de l'eau
chaude et doit comporter des composants isolés
attachés pour protégerl'opérateur.
WARNING: Risk of injury. Hot
surfaces can cause burns. Use
only designated gripping areas
of spray gun and wand. Do not
place hands or feet on non-
insulated areas of the pressure
washer.
AVERTISSEMENT: Les surfaces
chaudes peuvent causer des
brûlures.Utiliser uniquement
WARNING
RISK OF EXPLOSION:
OPERATE ONLY WHERE
OPEN FLAME OR TORCH
IS PERMITTED
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
WARNING
USE PROTECTIVE
EYE WEAR
AND CLOTHING
WHEN OPERATING
THIS EQUIPMENT.
WARNING
EAR PROTECTION
MUST BE WORN
WARNING
HOT DISCHARGE FLUID:
DO NOT TOUCH OR
DIRECT DISCHARGE
STEAM AT PERSONS.
WARNING
RISK OF INJURY.
HOT SURFACES
CAN CAUSE BURNS
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
7
Safety
les zones de prise désignées du pistolet pulvérisa-
teur et de la lance. Ne pas placer les mains ou les
pieds sur des endroits non isolés de la laveuse à
pression.
12. To reduce the risk of injury, close supervision is
necessary when a machine is used near children.
Do not allow children to operate the pressure
washer. This machine must be attended during
operation.
WARNING: Grip cleaning wand
securely with both hands
before starting. Failure to do
this could result in injury from a
whipping wand.
AVERTISSEMENT: Agripper la
lance de nettoyage avec les
deux mains avant de
commencer. Le non-respect de
cette consigne pourrait mener à
des blessures causées par le
mouvement violent de la lance.
13. Never make adjustments on machine while in
operation.
14. Be certain all quick coupler fittings are secured
before using pressure washer.
WARNING: High pressure
developed by these machines
will cause personal injury or
equipment damage. Keep clear
of nozzle. Use caution when
operating. Do not direct
discharge stream at people, or
severe injury or death will
result.
AVERTISSEMENT: La haute
pression générée par ces
machines causera des lésions corporelles ou des
dommages à l'équipement. Se tenir à l'écart de la
buse. Ne pas décharger directement le jet vers des
personnes ou des animaux, car cela risquerait de
causer des blessures graves ou même la mort.
WARNING: Protect machine
from freezing.
AVERTISSEMENT: Protéger la
machine contre le gel.
15.To keep machine in best
operating conditions, it is
important you protect machine
from freezing. Failure to protect
machine from freezing could
cause malfunction of the machine
and result in death, serious bodily injury, and/or
property damage. Follow storage instructions
specified in this manual.
16. Inlet water must be clean fresh water and no hotter
then 90°F.
WARNING: Risk of asphyxia-
tion. Running this product
indoors can result in death due
to carbon monoxide, a
poisonous gas you cannot see
or smell. Never operate
indoors, even if windows and
doors are open. Only use
outdoor and far away from
windows, doors, and openings
or vents.
AVERTISSEMENT: Risque d'asphyxie : L'utilisation
de ce produit à l'intérieur peut causer la mort par
monoxyde de carbone, un gaz toxique incolore et
inodore. Ne jamais utiliser à l'intérieur, même si les
fenêtres et les portes sont ouvertes. Utiliser
uniquement à l'extérieur et à l'écart des fenêtres,
des portes et des ouvertures ou fentes de ventila-
tion.
17. Avoid installing machines in small areas or near
exhaust fans. Adequate oxygen is needed for
combustion or dangerous carbon monoxide will
result.
18. Manufacturer will not be liable for any changes
made to our standard machines or any compo-
nents not purchased from us.
19. The best insurance against an accident is precau-
tion and knowledge of the machine.
WARNING
TRIGGER GUN KICKS
BACK — HOLD WITH
BOTH HANDS
WARNING
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
WARNING
PROCTECT FROM
FREEZING
WARNING
RISK OF
ASPHYXIATION.
USE THIS PRODUCT
ONLY IN A WELL
VENTILATED AREA.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
8
Safety
WARNING: Be extremely careful
when using a ladder, scaf-
folding or any other relatively
unstable location. The cleaning
area should have adequate
slopes and drainage to reduce
the possibility of a fall due to
slippery surfaces.
AVERTISSEMENT: Faire preuve
d'une extrême prudence au
moment d'utiliser une échelle,
des échafaudages ou toute autre surface relative-
ment instable. La zone de nettoyage doit avoir une
pente et un drainage adéquats pour réduire la
possibilité d'une chute due à une surface glissante.
20. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
21. Do not operate this machine when fatigued or
under the influence of alcohol, prescription medica-
tions, or drugs.
WARNING: If connection is made to a
potable water system, the system
shall be protected against back flow.
AVERTISSEMENT: Si une connexion
est établie avec un réseau d'eau
potable, le réseau doit être protégé contre le retour
d'eau.
Follow the maintenance instructions
specified in the manual.
WARNING
RISK OF INJURY
FROM FALLS WHEN
USING LADDER.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
9
Operations
98011900-2
CAUTION HOT WATER:
Must use insulated
spray gun and wand.
High Limit
Thermostat
Fuel Tank
Wand Holder
Downstream
Detergent
Injector
Pump
Fresh Water
Faucet
(not included)
Garden Hose
(not included)
High Pressure
Hose
Burner
Motor
Insulated
Spray Gun
Variable Pressure
Insulated Wand
Control
Handle
Detergent
Bucket
(not included)
Detergent
Pick-Up
Hose
Burner
Chamber
Control
Panel
Pump Switch
Burner Switch
Discharge
Nipple
Quick Coupler
Nozzle
Coupler
Pressure
Switch
Unloader
GFCI
High
Pressure
Nozzle
Component Identification
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
10
Operations
Assembly Instructions
STEP 1: Connect water supply
hose.
STEP 4: Attach the high pressure
hose to the spray gun using teflon
tape on hose threads.
STEP 2: Check fuel tank and pump
oil levels.
STEP 5: Connect the high pressure
hose to the pump discharge fitting.
Push coupler collar forward until
secure.
STEP 3: Connect high pressure
hose to discharge nipple by sliding
quick coupler collar back. Insert
quick coupler onto discharge nipple
and secure by pushing quick
coupler collar forward.
Fuel
Cap
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
11
Operations
Installation
Place machine in a convenient location providing
ample support, draining and room for maintenance.
This machine is intended for outdoor use. Machine
must be stored indoors when not in use.
Location:
The location should protect the machine from
damaging environmental conditions, such as wind, rain,
and freezing.
1. This machine should be run on a level surface
where it is not readily influenced by outside
sources such as strong winds, freezing tempera-
tures, rain, etc. It should be located to allow acces-
sibility for refilling of fuel, adjustments and
maintenance. Normal precautions should be taken
by the operator of the machine to prevent moisture
from reaching the electrical controls.
2. It is recommended that a partition be made
between the wash area and the machine to
prevent water spray from coming in contact with
the machine. Excess moisture reaching any
electric components or electrical controls will
reduce machine life and may cause electrical
shorts.
3. During installation of the machine, beware of
poorly ventilated locations or areas where exhaust
fans may cause an insufficient supply of oxygen.
Sufficient combustion can only be obtained when
there is a sufficient supply of oxygen available for
the amount of fuel being burned. If it is necessary
to install a machine in a poorly ventilated area,
outside fresh air may have to be piped to the
burner and a fan installed to bring air into the
machine.
Avoid small locations or areas near exhaust fans.
Electrical:
This machine, when installed, must be electrically
grounded in accordance to local codes. Check for
proper power supply using a volt meter.
Placement:
Do not locate near any combustible material. Keep all
flammable material at least 20 feet away.
Allow enough space for servicing the machine.
Local code will require certain distances from floor and
walls. (Two feet away from walls should be adequate.)
Water Source:
The water source for the pressure washer should be
supplied by a minimum 5/8" I.D. garden hose with a city
water pressure of not less than 30 PSI. If the water
supply is inadequate, or if the garden hose is kinked,
the attached pressure washer will run very rough and
the burner will not fire.
Connection:
Connect the wand, nozzle, hose and spray gun (where
applicable). On pipe thread connections, use teflon
tape to avoid water leaks. (See Component Identifica-
tion).
Venting:
Adding exhaust vent pipe to your oil fired burner is not
recommended because restricted air flow causes
carbon build-up, which affects the operation, and
increases maintenance on the coil. If a stack must be
used, refrain from using 90° bends. If the pipe can not
go straight up then use only 45° bends and go to the
next size pipe. The overall pipe length must not exceed
6 feet in length*.
NOTE: After vent pipe installation test burner using a
smoke tester and adjust air setting to achieve a #3 or
below results.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
12
Operations
Operating Instructions
STEP 1: Turn water on.
STEP 4: Before installing nozzle,
turn on water supply and run
machine, allowing water to flush
through the system until clear.
Turn switch to pump position.
When a steady stream of water
flows from the spray gun and wand
the machine is ready for cold water
cleaning by turning the variable
pressure control handle clockwise
to raise the pressure.
For hot water washing, turn the
switch to the burner position. (The
burner will light automatically when
the trigger on the spray gun is
pulled.)
STEP 2: Connect the power cord
into the proper electrical outlet,
then push in the GFCI reset button.
(Refer to serial plate for
information).
STEP 3: Grip spray gun handle
securely and pull trigger. Then turn
variable pressure control handle
counterclockwise.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
Selection of high or low pressure is accompanied by turning the handle.
NOTE: High pressure nozzle must be inserted at end of wand to obtain
high pressure. To apply soap read Detergents & General Operating
Techniques.
Variable Pressure
Control Handle
Trigger
Variable Pressure
Wand (VP)
High
Pressure
Nozzle
Brass Soap
Nozzle
13
Operations
Detergents & General Operating
Techniques
WARNING: Some
detergents may be
harmful if inhaled or
ingested, causing severe
nausea, fainting or
poisoning. The harmful
elements may cause
property damage or
severe injury.
AVERTISSEMENT : Certains détergents
peuvent être dangereux s'ils sont inhalés
ou ingérés, provoquant de fortes nausées,
des évanouissements et
l'empoisonnement. Les éléments
dangereux peuvent causer des dommages
à la propriété ou des blessures graves.
STEP 1: Connect detergent injector to discharge nipple
on machine, Connect high pressure hose to injector
with quick coupler (check to make sure locking coupler
sleeves are in proper position before applying water
pressure.
STEP 2: Use detergent designed
specifically for pressure washers.
Household detergents could
damage the pump. Prepare
detergent solution as required by
the manufacturer. Fill a container
with pressure washer detergent.
Place the filter end of detergent
suction tube into the detergent
container.
STEP 3: Apply safety latch to spray gun trigger. Turn
variable pressure control handle until discharge water
exits both tubes. Secure black detergent nozzle into
quick coupler if you have a single wand.
NOTE: Detergent cannot be applied using Red,
Yellow, Green or White nozzles.
STEP 4: With the engine running,
pull trigger to operate machine.
Liquid detergent is drawn into the
machine and mixed with water.
Apply detergent to work area. Do
not allow detergent to dry on
surface.
Thermal Pump Protection
If you run the engine on your pressure washer for 3-5
minutes without pressing the trigger on the spray gun,
circulating water in the pump can reach high tempera-
tures. When the water reaches this temperature, the
pump protector engages and cools the pump by
discharging the warm water onto the ground. This
thermal device prevents internal damage to the pump.
WARNING
Detergent
Injector
High
Pressure
Hose
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
14
Operations
Cleaning Tips
Pre-rinse cleaning surface with fresh water. Place
detergent suction tube directly into cleaning solution
and apply to surface at low pressure (for best results,
limit your work area to sections approximately 6 feet
square and always apply detergent from bottom to top).
Allow detergent to remain on surface 1-3 minutes. Do
not allow detergent to dry on surface. If surface
appears to be drying, simply wet down surface with
fresh water. If needed, use brush to remove stubborn
dirt. Rinse at high pressure from top to bottom in an
even sweeping motion keeping the spray nozzle
approximately 1 foot from cleaning surface. Use over-
lapping strokes as you clean and rinse any surface. For
best surface cleaning action spray at a slight angle.
Recommendations:
• Before cleaning any surface, an inconspicuous
area should be cleaned to test spray pattern
and distance for maximum cleaning results.
• If painted surfaces are peeling or chipping, use
extreme caution as pressure washer may
remove the loose paint from the surface.
• Keep the spray nozzle a safe distance from the
surface you plan to clean. High pressure wash
a small area, then check the surface for
damage. If no damage is found, continue to
pressure washing.
CAUTION - Never use:
• Bleach, chlorine and other corrosive chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the machine and will
damage the surface being cleaned.
ATTENTION : Ne jamais utiliser :
• Eau de Javel, produits à base de chlore et
autres produits chimiques corrosifs
• Liquides contenant des solvants (c.-à-d. diluant
à peinture, essence, huiles, etc.)
• Produits à base de tripolyphosphate de sodium
• Ammoniac ou produits à base d'acide
Ces produits chimiques endommageront la machine et
endommageront la surface étant nettoyée.
Rinsing
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun. Remove black soap
nozzle from the quick coupler. Select and install the
desired high pressure nozzle.
NOTE: You can also stop detergent from flowing by
simply removing detergent siphon tube from bottle.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
15
Operations
Shutting down & Cleaning
Up
STEP 1: Remove detergent suction
tube from container and insert into
1 gallon of fresh water. Turn
variable pressure wand handle for
low pressure or connect the black
detergent nozzle. Pull trigger on
spray gun and siphon water for one
minute
STEP 4: Turn garden hose water
off. Open the spray gun to relieve
remaining pressure.
STEP 2: Turn burner switch off and
continue spraying water, allowing
the water to cool. After water has
cooled to less than 100°F, turn the
attached pressure washer off.
STEP 3: Turn off water supply.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
16
Operations
Storage
CAUTION: Always store your pressure
washer in a location where the
temperature will not fall below 32°F (0°C).
The pump in this machine is susceptible to
permanent damage if frozen. FREEZE
DAMAGE IS NOT COVERED BY
WARRANTY.
ATTENTION : Toujours entreposer la
laveuse à pression dans un endroit où la
température ne sera pas inférieure à 0°C
(32°F). La pompe sur cette machine est
susceptible de subir des dommages si elle
est exposée au gel. LES DOMMAGES DUS
AU GEL NE SONT PAS COUVERTS PAR
LA GARANTIE.
1. Stop the pressure washer, squeeze spray gun
trigger to release pressure.
2. Detach water supply hose and high pressure hose.
3. Turn on the machine for a few seconds, until
remaining water exits. Turn motor off immediately.
4. Drain the fuel from the fuel tank.
5. Do not allow high pressure hose to become kinked.
6. Store the machine and accessories in a room
which does not reach freezing temperatures.
CAUTION: Failure to follow the above
directions will result in damage to your
pressure washer.
ATTENTION : Le non-respect des
directives ci-dessus entraînera des
dommages à la laveuse à pression.
When the pressure washer is not being operated or is
being stored for more than one month, follow these
instructions:
1. Replenish pump oil to upper level.
2. Drain fuel from fuel tank, fuel line and filter.
3. Cover the pressure washer and store in a clean,
dry place that is well ventilated away from open
flame or sparks.
After Extended Storage
CAUTION: Prior to restarting, thaw out any
possible ice from pressure washer hoses,
spray gun or wand.
ATTENTION : Avant de redémarrer, faire
fondre la glace se trouvant sur les boyaux,
le pistolet pulvérisateur ou la lance de la
laveuse à pression.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
17
Maintenance
Preventative Maintenance
1. Use clean fuel — kerosene, No. 1 home heating
fuel or diesel fuel. Clean or replace fuel filter every
100 hours of operation. Avoid water contaminated
fuel as it will seize up the fuel pump. De-soot coils
monthly. Use an additive if diesel is being used.
2. Check to see that the attached pressure washer
water pump is properly lubricated.
3. Follow winterizing instructions to prevent freeze
damage to pump and coils.
4. Always neutralize and flush detergent from system
after use.
5. If water is known to be high in mineral content, use
a water softener on your water system, or de-scale
as needed.
6. Do not allow acidic, caustic or abrasive fluids to be
pumped through the system.
7. Always use high grade quality cleaning products.
8. Never run attached pressure washer pump dry for
extended periods of time.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, preventing water from
reaching maximum operating temperature. (See
section on Maintenance and Service).
10. Never allow water to be sprayed on or near the
motor or burner assembly or any electrical compo-
nent.
11. Delime coils as per instructions.
It is advisable, periodically, to visually inspect the
burner. Check air inlet to make sure it is not clogged or
blocked. Wipe off any oil spills and keep equipment
clean and dry.
The areas around the pressure washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of ventilating air to the burner must not be
blocked or obstructed in any manner.
Maintenance & Service
Unloader Valves:
Unloader valves trap pressure in the line when a shut-
off spray gun is closed. Machines with unloader valves
are preset and tested at the factory before shipping.
Tampering with the factory settings may cause
personal injury and/or property damage and will void
the manufacturer's warranty.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures
whenever the washer must be stored or operated
outdoors under freezing conditions.
During winter months, when temperatures drop below
32°F, protecting your machine against freezing is
necessary. Store the machine in a heated room. If this
is not possible then mix a 50/50 solution of anti-freeze/
water or windshield washer fluid with water in a 5 gallon
bucket. Place a short section of garden hose into the
bucket and connect it to the machine. Elevate the
bucket and turn the pump on to siphon the anti-freeze
through the machine. If compressed air is available, an
air fitting can be screwed into the inlet connector and by
injecting compressed air, all water will be blown out of
the system.
If you have an optional float tank, pour the antifreeze
into this tank and run machine until antifreeze exits
discharge nipple.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature, the high limit
control will turn the burner off until the water cools.
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should
be checked by using the dipstick found on the top of the
pump or by the red dot visible through the oil gauge
window. Oil should be maintained at that level.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best preven-
tion for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of deliming powder will remove
lime and other deposits before coil becomes plugged.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
18
Maintenance
Deliming Coils With A Pressure Washer:
Periodic flushing of coils is recommended.
1. Fill a 5 gallon bucket with 4 gallons of water, then
add 1 lb. of deliming powder. Mix thoroughly.
2. Remove the high pressure nozzle from the
pressure wand and put the wand into the bucket.
Secure the trigger on the spray gun into the open
position.
3. Attach a short section (3-5 ft.) of garden hose to
the attached pressure washer to siphon solution
from the elevated bucket. Start up pressure
washer, allowing solution to be pumped through
pressure washer and into HPB coils and back into
the bucket. Solution should be allowed to circulate
2-4 hours.
4. After circulating solution flush entire system with
fresh water.
Removal of Soot In Heating Coil:
In the heating process, fuel residue in the form of soot
deposits may develop between the heating coil pipe
and block air flow which will affect burner combustion.
When soot has been detected on visual observation,
the soot on the coil must be washed off after coil has
been removed using the following steps:
1. Remove the tank head assembly by unscrewing
the three tek screws and lifting the tank head off.
2. Remove the two pipe nipples and associated
fittings.
3. Lift the coil out of the outer wrap.
Caution: The coil weighs about 80 lbs. Use
proper lifting techniques.
ATTENTION : La bobine pèse environ 36.3
kg (80 lb). Utiliser des techniques de
levage appropriées.
4. Clean, repair and replace the coil by reversing the
above steps.
Coil Reinstallation
Reinstall by reversing the above steps 4 through 1.
Rupture Disk
If pressure from pump or thermal expansion should
exceed safe limits, the rupture disk will burst, allowing
high pressure to be discharged through hose to ground.
When the disk ruptures, it will need to be replaced.
Fuel:
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every 100
hours of operation. Use Kerosene No. 1 or No. 2
Heating Fuel (ASTM D306) or diesel only. NEVER use
gasoline in your burner tank. Gasoline is more combus-
tible than fuel oil and could result in a serious explo-
sion. NEVER use crankcase or waste oil in your burner.
Fuel unit malfunction could result from contamination.
Ignition Circuit:
Periodically inspect wires, spring contact and elec-
trodes for condition, security and proper spacing. For
transformer test (CAUTION 10,000 VOLTS) use defect
free insulated screwdriver and keep fingers off blade!
Lay blade across one contact: OK if arc will span 1/2"
between end of blade and other contact.
Electrode Setting:
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
19
Maintenance
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with a
clean, solvent-saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Fuel Control System:
This machine utilizes a fuel solenoid valve located on
the fuel pump to control the flow of fuel to the combus-
tion chamber. This solenoid is activated by a pressure
switch located on the unloader valve. When an
operator releases the trigger on the spray gun, the
pressure drops, allowing the pressure switch to activate
the fuel solenoid. The solenoid then closes, shutting off
the supply of fuel to the combustion chamber.
Controlling the flow of fuel in this way gives an instanta-
neous burn or no burn situation, thereby eliminating
high and low water temperatures, and combustion
smoke normally associated with machines incorpo-
rating a spray gun. Periodic inspection is recom-
mended to insure that the fuel solenoid valve functions
properly. This can be done by operating the machine
and checking to see that when the trigger on the spray
gun is in the off position, the burner is not firing.
Fuel Pressure Adjustment:
To adjust fuel pressure, First install a pressure gage
into the port just after the pump fuel exit. Turn the
adjusting screw (located at the regulator port)
clockwise to increase, and counterclockwise to
decrease. Do not exceed 200 psi or lower the pressure
below 130 PSI, when checked at the post-pump
pressure port.
The fuel pressure may need to be adjusted due to
altitude. For every 500 ft altitude above sea level, the
boiling point of water goes down 1 °F. At high altitude
environments, this boiling point change may require the
heat input to be lowered so the water input does not
turn to steam earlier than at the factory settings and
activate the pressure sensors and pressure relief
equipment when the unit is operated and much higher
altitudes from factory settings or local dealer site
settings. Check with your dealer before making local
site fuel pressure adjustments.
Also, as ambient temperature changes seasonally, the
fuel temperature in the feed tank and air temperature
inlet can impact fuel flow. In more extreme tempera-
tures, this local-site adjustment may also require
different fuel nozzles for fuel inlet temperatures that are
at seasonal extremes (higher or lower) in locations
where the temperature changes are beyond moderate
temperatures of between 40°F and 90°F. Colder
temperatures will make for a thicker flow and less fine a
fuel spray while hotter temperatures will make for a
thinner flow a more fine spray with the same nozzle.
Consider alternate nozzle configurations from the
baseline factory-supplied nozzle for operating in such
temperature extremes if performance is not meeting
needs with air band and fuel pressure settings alone.
NOTE: When changing fuel pump, a by-pass plug
must be installed in return line port or fuel pump will
not prime
Air Adjustment
The oil burner on this machine is preset for operation at
altitudes below 500 feet. If operated at higher altitudes,
it may be necessary to adjust the air band for a #1 or #2
smoke spot on the Bacharach scale.
To adjust, start machine and turn burner ON. Loosen
two locking screws found on the air band and close air
band until black smoke appears from burner exhaust
vent. Note air band position. Next, slowly open the air
band until white smoke just starts to appear. Turn air
band halfway back to the previously noted position.
Tighten locking screws.
For higher altitudes, the air band opening may need to
be increased; for lower altitude, the air band may need
to be decreased.
For higher humidity, the air band opening may need to
be increased; for lower relative humidity, the air band
may need to be decreased.
For higher ambient temperatures the air band opening
may need to be increased; for lower ambient tempera-
tures, the air band opening may need to be decreased.
Adjust to your operating location’s environment as-
needed for best smoke spot and performance
compliant with local, state, and federal regulations.
To adjust: start machine and turn burner ON. Loosen
the two locking screws found on the air band openings
(refer to illustrations) and close air band until black
smoke appears from burner exhaust vent. Note air
band position. Next, slowly open the air band until white
smoke just starts to appear. Turn air band halfway back
to the black smoke position previously noted. Tighten
locking screws.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
20
Maintenance
Troubleshooting
Problem Possible Cause Solution
Low Operating
Pressure
Faulty pressure gauge Install new gauge.
Insufficient water supply
Use larger garden hose; clean filter washer at water
inlet.
Old, worn or incorrect spray
nozzle
Match nozzle number to machine and/or replace with
new nozzle.
Plumbing or hose leak
Check plumbing system for leaks. Retape leaks with
teflon tape.
Faulty or mis-adjusted unloader
valve (where applicable)
Adjust unloader for proper pressure. Install repair kit
when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge
valves in pump
Clean inlet or discharge valves.
Worn inlet or discharge valves Replace with valve kit.
Detergent Not
Drawing
Air leak
Tighten all clamps.
Check detergent lines for holes.
Valve in the injector head may be
blocked, dirty or damaged
Clean or replace valve in injector.
Filler screen on detergent suction
hose plugged
Clean or replace.
Dried up detergent plugging
metering valve
Disassemble and clean thoroughly.
High viscosity of detergent Dilute detergent to specifications.
Hole in detergent line(s) Repair hole.
Low detergent level Add detergent if needed.
Discharge water temperature
above 180°F
Lower discharge water temperature.
Pump Running
Normally but Pressure
Low on Installation
Pump sucking air Check water supply and possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized
Check and replace if necessary (See serial plate for
proper size).
Worn piston packing Check and replace in necessary.
Fluctuating Pressure
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air
Check water supply and air seepage at joints in
suction line.
Worn piston packing Check and replace if necessary.
Pump Noisy
Air in suction line Check water supply and connections on suction line.
Broken or weak inlet or discharge
valve springs
Check and replace if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
21
Maintenance
Problem Possible Cause Solution
Low Water
Temperature
Improper fuel or water in fuel Drain fuel tank and replace with proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump
Check fuel pump temperature. Replace pump if
needed.
Fuel filter partially clogged Replace as needed.
Soot build up on coils Clean coils with soot remover.
Lime build up on coils Clean inside of coils using coil cleaner.
Improper burner nozzle See Burner Specifications.
Water Temperature
Too Hot
Incoming water to machine warm
or hot
Lower incoming water temperature.
Fuel pump pressure too high Lower fuel pressure.
Fuel pump defective Replace fuel pump.
Detergent line sucking air Tighten all clamps. Check detergent line for holes.
Defective high limit switch (ther-
mostat)
Replace.
Incorrect fuel nozzle size See Burner Specifications.
Insufficient water supplied Check GPM to machine.
Restricted water flow Check nozzle for obstruction, proper size.
Machine Smokes
While Burner Unit Is
Running
Or
Unit Smokes At Cold
Start Only When
Burner Is Off
Improper air adjustment Readjust air bands on burner assembly
Fuel pressure is low <140 psi for
burner
Adjust fuel pump pressure to specifications
Burner nozzle is plugged or dirty
Replace nozzle. Check parts breakdown for nozzle
size
Burner nozzle spray pattern is
faulty
Replace nozzle. Check parts breakdown for nozzle
size
Heavy accumulation of soot on
coils and burner assembly
Remove coils and burner assembly, clean thoroughly
Call local dealer
Misaligned electrode setting Realign electrodes to specifications
Obstruction in smoke stack Check for insulation blockage or other foreign objects
Low engine RPM Increase RPM to correct specs. See serial plate
Fuel Pressure is too high for clean
burn (fuel PSI above 140 and
below 200) and smokes when
burner is off
Reduce fuel pressure PSI/Increase air band set for
cleaner without max water heat loss
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
22
Maintenance
This pressure washer was produced with the best available materials and quality craftsmanship. However, you as
the owner have certain responsibilities for the correct care of the equipment. Attention to regular preventative main-
tenance procedures will assist in preserving the performance of your equipment. Contact your Pressure Washers
dealer for maintenance. Regular preventative maintenance will add many hours to the life of your pressure washer.
Perform maintenance more often under severe conditions.
Oil Change Record
Maintenance Schedule
Replace Fuel Lines Annually
Pump Oil
Inspect Inspect the oil level daily
Change After first 50 hours, then every 500 hours or annually
Clean Burner Filter Monthly (More often if fuel quality is poor)
Remove Burner Soot Annually
Burner Adjustment/Cleaning Annually
De-scale Coil Annually (More often if required)
Replace High Pressure Nozzle Every 6 months
Replace Quick Connects Annually
Clean Water Screen/Filter Weekly
Clean Float/Supply Tank Every 6 months
Replace HP Hose Annually if there is sign of wear
Grease Motor Every 10,000 hours
Replace Burner Nozzle Annually
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last Oil
Change
Date Oil Changed
Month/Day/Year
Estimated Operating
Hours Since Last Oil
Change
Kärcher HPB Series Operator’s Manual 9.801-190.0 - W
www.karchercommercial.com
Kärcher HPB • 9.801-190.0 • Printed in U.S.A.
