Karcher K 3.740 User Manual
K 3.740
HIGH PRESSURE WASHER - OPERATOR MANUAL
NETTOYEUR HAUTE PRESSION - MANUEL D'UTILISATION
MANUAL DE USUARIO DEL LIMPIADOR DE ALTA PRESIÓN
English 3
Français 22
Español 42
59639230 (12/10)
2
HIGH PRESSURE WASHER OPERATOR MANUAL
HIGH PRESSURE WASHER OPERA-
TOR MANUAL . . . . . . . . . . . . . . . . 3
MODEL OVERVIEW . . . . . . . . . . . 4
IMPORTANT SAFETY INSTRUCTIONS . . . 5
ASSEMBLY INSTRUCTIONS . . . . 7
OPERATING INSTRUCTIONS . . . 9
USING THE ACCESSORIES . . . . 11
WORKING WITH DETERGENTS . . 11
TAKING A BREAK ..five minutes or more . . 12
SHUTTING DOWN & CLEAN-UP . . 13
WINTERIZING AND LONG-TERM STOR-
AGE . . . . . . . . . . . . . . . . . . . . . . . 14
CARE AND MAINTENANCE INSTRUC-
TIONS. . . . . . . . . . . . . . . . . . . . . . 14
CLEANING TIPS . . . . . . . . . . . . . 15
OPTIONAL CLEANING ACCESSORIES . . 17
TROUBLESHOOTING . . . . . . . . . 19
Safety Alert 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 injury.”
CAUTION
indicates “a potentially hazardous situation which, if not avoided, may result
in minor or moderate injury or in property damage incidents.”
Specifications
Max. Pressure 1800 PSI Max. Water Flow 1.5 GPM Amp draw 13 AMPS Voltage 120 V Part No. 1.603-120.0 Serial no.
For household use only!
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.
Customer Support
USA and Canada
In the U.S. or Canada, please call
1-800-537-4129 for warranty issues
and visit www.karcher-help.com for
technical support and product assistance.
Please take a moment to register your
pressure washer online at
www.karcher-register.com. Be sure
to save your purchase receipt, it will be
required for repairs covered by warranty.
Customer Support
Mexico
Call: 01-800-024-13-13 for help or visit our website: www.karcher.com.mx
English 3
MODEL OVERVIEW
1 Garden hose connector (female)
2 Water inlet connector
3 Water inlet with filter
4 High pressure hose
5 Quick coupling for high pressure
hose
6 ON/OFF switch
7 Dosage regulator for detergent
8 Storage for trigger gun
9 Transport handle, detachable
10 Screws (Philips style)
11 Storage for high-pressure hose
12 Detergent suction tube with filter
and cap
13 Detergent tank
14 Accessory storage
15 Storage hook for mains connection
cable
16 Power cord with Ground Fault Cir-
cuit Interrupter (GFCI)
17 Wheels
18 Trigger gun
19 Lock trigger gun
20 Key to detach the high pressure
hose from the trigger gun
21 Dirtblaster ® (Rotary spray wand)
22 Vario Power Spray wand
4 English
IMPORTANT SAFETY INSTRUCTIONS
WARNING
When using this product basic precautions should always be followed, including the following:
To reduce the risk of injury, close
supervision is necessary when a
product is used near children.
Know how to stop the product and
bleed pressures quickly. Be thoroughly familiar with the controls.
Stay alert – watch what you are do-
ing.
Do not operate the product when fa-
tigued or under the influence of alcohol or drugs.
Keep operating area clear of all per-
sons.
Do not overreach or stand on unsta-
ble support. Keep good footing and
balance at all times.
Follow the maintenance instruc-
tions specified in the manual.
This product is provided with a
Ground Fault Circuit Interrupter
built into the power cord plug. If replacement of the plug or cord is
needed, use only identical replacement parts.
WARNING
Risk of Injection or Injury – Do Not
Direct Discharge Stream At Persons.
High pressure jets can be danger-
ous if misused. The jet must not be
directed at persons, animals, electrical devices, or the unit itself.
Wear safety goggles.
WARNING
Risk Of Explosion – Do not spray
flammable liquids.
Do not use acids, alkaline, solvents, or
any flammable material in this prod-
uct. These products can cause physi-
cal injuries to the operator and
irreversible damage to the machine.
CAUTION
Gun Kicks Back – Hold with both
hands.
The Trigger Gun Safety Lock pre-
vents the trigger from accidentally
being engaged. This safety feature
DOES NOT lock trigger in the ON
position.
WARNING – Risk of Electrocu-
tion
Inspect cord before using – Do not
use if cord is damaged.
Keep all connections dry and off the
ground.
Do not touch plug with wet hands. Do not use extension cord with this
product.
Connect to individual branch circuit
only.
CAUTION
This unit has been designed for use
with cleaning detergents recommended by the manufacturer. The use of
other cleaning detergents may affect
the operation of the machine and void
the warranty.
WARNING
Do not spray electrical apparatus and
wiring.
Do not use with flammable liquids and
toxic chemicals.
Injection hazard: equipment can cause
serious injury if the spray penetrates
English 5
the skin. do not point the gun at anyone
or any part of the body. In case of penetration seek medical aid immediately.
This system is capable of producing
12400 kPa /1800 PSI to avoid rupture
and injury, do not operate this pump
with components rated less than
12400 kPa /1800 PSI working pressure (including but not limited to spray
guns, hose and hose connections).
Before servicing, cleaning or removing
any parts, shut off power and relieve
pressure.
GROUNDING INSTRUCTIONS
This product must be grounded. If it
should malfunction or breakdown,
grounding provides a path of least resistance for electric current to reduce
the risk of electric shock. This product
is equipped with a cord having an
equipment-grounding conductor and a
grounding plug. The plug must be
plugged into an appropriate outlet that
is properly installed and grounded in
accordance with all local codes and ordinances.
DANGER
Improper connection of the equipmentgrounding conductor can result in a
risk of electrocution. 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 electrician.
Do not use any type of adapter with this
product.
GROUND FAULT CIRCUIT IN-
TERRUPTER PROTECTION
CI) built into the plug of the power-supply cord. This device provides
additional protection from the risk of
electric shock. Should replacement of
the plug or cord become necessary,
use only identical replacement parts
that include GFCI protection.
WATER SUPPLY
(Cold Water Only)
CAUTION
When connecting the water inlet to the
water supply mains, local regulations
of your water company must be observed. In some areas the unit must
not be connected directly to the public
drinking water supply. This is to ensure
that there is no feedback of chemicals
into the water supply. Direct connection via a receiver tank or backflow preventer, for example, is permitted.
Dirt in the feed water will damage the
unit. To avoid this risk, we recommend
fitting a water filter.
Garden hose must be at least 1/2
inch or 5/8 inch in diameter.
Flow rate of water supply must not
fall below 2 GPM (gallons per min-
ute).
Flow rate can be determined by
running the water for one minute
into an empty 5-gallon container.
The water supply temperature must
not exceed 104°F/40°C.
Never use the pressure washer to
draw in water contaminated with
solvents, e.g. paint thinners, gaso-
line, oil, etc.
Always prevent debris from being
drawn into the unit by using a clean
water source.
This pressure washer is provided with
a ground-fault circuit-interrupter (GF-
6 English
ASSEMBLY INSTRUCTIONS
For more detailed information on
how to assemble this pressure
washer, please visit
www.karcherresidential.com/
assembly
Required tools
A Philips Screwdriver, medium
size (not supplied)
for final assembly
Assembly
Mount loose parts delivered with appliance prior to start-up.
Install wheels and hub caps
STEP 1:
Insert the wheel into the body, rotating the wheel as you push it into
place. You should hear a click when
the wheel is completely inserted.
Then push the wheel cap into place
on the wheel, press around edges
and the center of the wheel cap to
make sure it is properly seated. You
should hear another click. Do not
proceed with the assembly until the
wheels are securely installed.
Install the storage for hand-spray
gun
STEP 2:
Place the bottom holder into the re-
cesses and push forward until it au-
dibly locks in.
Insert the top holder and push down
all the way.
Install the storage hook for the
mains connection cable
STEP 3:
Press in the storage hook and lock
it into the top position.
English 7
Install the transport handle
STEP 4:
Place the transport handle into the
intake until you feel resistance. Use
the heel of your hand or a soft rubber mallet to position it.
STEP 5:
To push the appliance, the transport handle must be pulled all the
way up; it will lock into place audibly.
Install the dosage regulator for detergent
STEP 6:
Insert detergent suction tube onto
the hose fitting.
Install the dosage regulator and
connect using 2 screws.
Note: During installation you must
make sure that the tongues of the
dosage regulator match up with the
intended recesses in the casing.
Connect the high pressure hose to
the hand spray gun
STEP 7:
Push the high pressure hose into
the trigger gun until it locks audibly.
Note: Make sure the connection
nipple is aligned correctly.
Check the secure connection by
pulling on the high pressure hose.
Disconnect:
Press the disconnect key on the
trigger gun and remove the high
pressure hose from the trigger gun.
8 English
OPERATING INSTRUCTIONS
This pressure washer has been tested
by Kärcher's quality assurance team. A
small amount of water may be present
in the water inlet or outlet. This is normal and will not affect the performance
of the pressure washer.
STEP 1:
Insert the spray wand of your
choice into the trigger gun. Press in
against the spring tension and twist
into locked position.
STEP 2:
Insert the high pressure hose tightly
into the quick coupling on the appliance, it will lock in audibly.
Note: Make sure the connection
nipple is aligned correctly.
Check the secure connection by
pulling on the high pressure hose.
STEP 3:
Install the supplied connector to the
unit’s water inlet.
Note: Never attach the garden
hose connector to the unit’s water
inlet!
STEP 4:
Screw the supplied garden hose
connector on to the end of your gar-
den hose. Push the garden hose
connector on to the water inlet con-
nector and make sure you hear it
click into place before proceeding.
Disconnect:
Push the casing of the quick cou-
pling for the high pressure hose toward the rear and disconnect the
high pressure hose from the appliance.
English 9
STEP 5:
Connect garden hose to the cold
water source and turn water on
completely.
STEP 6:
Plug the Ground Fault Circuit Interrupter (GFCI) into a receptacle.
Press RESET button, indicator
should be “ON”.
Press TEST button, indicator
should be “OFF”.
Press RESET button for use.
We recommend that you test the
GFCI as part of your startup procedure each time you use your pressure washer. To learn how to
peform this test on your unit, visit
http://www.karcherresidential.com/
gfci_test.php for detailed instructions for your type of GFCI.
WARNING
Do not use if above test fails.
STEP 7:
Unlock the trigger gun safety lock.
Trigger the gun to eliminate trapped
air, wait for a steady flow of water to
emerge from the spray nozzle.
STEP 8:
Turn on the high pressure washer
(I/ON).
The motor starts only if the trig-
ger of the gun is pulled and shuts
off when the trigger is released.
10 English
USING THE ACCESSORIES
WARNING
To avoid serious injury never point
spray nozzle at yourself, other persons or animals.
Always test an inconspicuous area
before cleaning with high pressure.
Vario Power Spray Wand
The Vario Power Spray Wand allows
you to adjust the cleaning pressure.
To clean at maximum pressure, the
wand must be positioned to the high
pressure setting (Max).
For lower pressure turn the wand
collar in the minus (Min) direction.
Dirtblaster
This nozzle features a 0º pencil jet
®
which rotates 360º for maximum dirt
cutting action, effectively increasing
cleaning performance up to 50%.
This nozzle combines the cleaning
performance of a 0º pencil jet with
the surface coverage of a wide an-
gle nozzle.
Not recommended for soft mate-
rials, siding, painted surfaces,
decks or autos.
Before cleaning any surface an in-
conspicuous area should be
cleaned to test spray pattern and
distance for maximum cleaning re-
sults.
To apply detergent, the wand must
be positioned to the lower pressure
setting (Mix).
WORKING WITH DETERGENTS
Detergents can only be applied at
low pressure setting (Mix).
STEP 1:
Install the Vario Power Spray
Wand. Set the spray wand to the
low pressure setting (Mix).
STEP 2:
Fill the detergent tank with Karcher
detergent and position the tank into
its storage area. Insert the suction
tube with filter into the tank and
close it with the cap.
English 11
STEP 3:
Adjust the suction volume of the detergent solution by means of the
dosage regulator for detergents.
STEP 4:
Turn on the pressure washer (I).
Pull trigger to operate unit. Liquid
detergent is drawn into the unit and
mixed with water. Apply detergent
to work area. Do not allow detergent to dry on surface.
STEP 5:
To rinse, move the VPS out of „Mix“ position and pull trigger to operate unit.
STEP 6:
Cleaning up: Always draw fresh
water through the detergent tank or
siphon tube when done to flush any
remaining detergents from the injection system.
For best results see Cleaning Tips for specific information on how to clean different surfaces.
Always Use Kärcher ® Detergent for Best Results
Kärcher ® biodegradable detergents
are specially formulated to protect the
environment and your pressure washer. The special formula won’t clog the
suction tube filter and will protect the
internal parts of the pressure washer
for a longer life. For Kärcher ® Detergents, check your retailer or visit our
website:
www.buykarcher.com
CAUTION
Never use:
– Bleach, Chlorine products and oth-
er corrosive chemicals
– Liquids containing solvents (i.e.,
paint thinners, gasoline, oils)
– Tri-sodium phosphate products
– Ammonia products
– Acid-based products
These chemicals will harm the unit and will damage the surface being cleaned.
Use of these items will void the warranty.
TAKING A BREAK ..five minutes or more
STEP 1:
Release trigger and engage gun safety lock.
12 English
STEP 2:
Turn pressure washer to OFF (0)
position.
SHUTTING DOWN & CLEAN-UP
STEP 1:
Turn the switch to OFF (0) position
and unplug cord from outlet.
STEP 2:
Turn off the water source.
STEP 3:
Press trigger to release water pressure.
STEP 4:
Release trigger and engage gun
safety lock.
STEP 5:
Disconnect the garden hose from
the water inlet on the unit.
Caution: When disconnecting the
supply or high pressure hose, warm
water may leak from the connec-
tions after operation.
English 13
WINTERIZING AND LONG-TERM STORAGE
1: Disconnect all water connec-
tions.
2: Turn on the machine for a few
seconds, until the water which had
remained in the pump exits, turn off
immediately.
3: Do not allow high pressure hose
to become kinked.
4: Store the machine and accesso-
ries in a room which does not reach
freezing temperatures. DO NOT
store near furnace or other sources
CARE AND MAINTENANCE INSTRUCTIONS
Cleaning the water inlet filter
STEP 1:
Pull out water inlet filter with flatnose pliers.
of heat as it may dry out the pump
seals.
CAUTION
Failure to follow the above directions
will result in damage to the pump assembly and accessories and will void
the warranty.
Kärcher ® also recommends the regular
practice of using a pump protector like
“Kärcher ® Pump Guard” to prevent
cold weather damage during storage in
the winter months.
STEP 3:
Reinsert water inlet filter.
Maintenance
The unit is maintenance-free.
STEP 2:
Rinse out water inlet filter in warm water.
14 English
CLEANING TIPS
CAUTION
Before cleaning any surface an in-
conspicuous 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.
When using on surfaces which
might come in contact with food,
flush surfaces with plenty of drinking water.
For additional cleaning tips and a
complete video library, visit our
website:
www.karcherresidential.com
Deck Cleaning
(with or without detergent). Pre-rinse
deck and surrounding area with fresh
water. If using detergent, apply to surface at low pressure. For best results,
limit your work area to smaller sections
of approximately 25 square feet. Allow
detergent to remain on surface 1-3
minutes. Do not allow detergent to dry
on surface. Rinse at high pressure in a
long sweeping motion keeping the
spray nozzle approximately 3-6 inches
from the cleaning surface. Always
clean from top to bottom and from left
to right. When moving on to a new section of the cleaning surface, be sure to
overlap the previous section to eliminate stop marks and ensure a more
even cleaning result.
House Siding
(with or without detergent). Pre-rinse
cleaning surface with fresh water. If us-
ing detergent, apply to surface at low
pressure (for best results, limit your
work area to sections of approximately
6 feet 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 special wash brush attachment (not included) to remove
stubborn dirt. Rinse at high pressure
from top to bottom in an even sweeping motion keeping the spray nozzle
approximately 6 inches from the cleaning surface.
Cement Patios, Brick and Stone
(with or without detergent). Pre-rinse
cleaning surface with fresh water. If using detergent or Degreaser, apply to
surface at low pressure. For best results, limit your work area to smaller
sections of approximately 25 square
feet. Allow detergent or Degreaser to
remain on surface 1-3 minutes. Do not
allow detergent to dry on surface.
Rinse at high pressure in a sweeping
motion keeping the spray nozzle approximately 3-6 inches from the cleaning surface. Always clean from top to
bottom and from left to right. For removing extremely stubborn stains, use
the Dirtblaster ® Nozzle.
Cars, Boats & Motorcycles
(with or without detergent). Pre-rinse
vehicle with fresh water. If using detergent, apply to surface at low pressure.
For best results, clean one side of vehicle at a time and always apply detergent from bottom to top, do not allow
detergent to dry on surface. If needed,
English 15
use special wash brush attachment
(not included) to remove stubborn dirt.
Rinse at high pressure in a sweeping
motion keeping the spray nozzle approximately 6-8 inches from the cleaning surface (distance should increase
when rinsing pin-striping or other sensitive surfaces). Always clean from top
to bottom and from left to right. For best
results, wipe surface dry with a chamois or soft dry cloth.
Barbecue Grills, Outdoor Power
Equipment & Gardening Tools
(with or without detergent). Pre-rinse
cleaning surface with fresh water. If using detergent or Degreaser, apply detergent at low pressure. Allow
detergent to remain on surface 1-3
minutes. Do not allow detergent to dry
on surface. Rinse at high pressure
keeping the spray nozzle approximately 3-6 inches from the cleaning surface.
For removing extremely stubborn dirt,
it may be necessary to move the spray
nozzle even closer to the surface for
greater dirt cutting action.
Patio & Lawn Furniture
(with or without detergent). Pre-rinse
furniture and surrounding area with
fresh water. If using detergent, apply to
surface at low pressure. Allow detergent to remain on surface 1-3 minutes.
Do not allow detergent to dry on surface. If needed use special Wash
Brush Attachment (not included) to remove stubborn dirt. Rinse at high pressure in a sweeping motion keeping the
spray nozzle approximately 3-6 inches
from the cleaning surface. For best results, clean from top to bottom and
from left to right.
16 English
OPTIONAL CLEANING ACCESSORIES
Optional accessories are available to
further enhance your cleaning capabilities. These accessories are accurate
as of the printing date of this manual.
Please check our website for pricing
and up-to-date information.
Pump Guard
Specially formulated to protect your
pressure washer from freezing, corrosion and premature wear. The Pump
Guard also adds lubrication to valves
and seals to prevent sticking. Highly
recommended for all Kärcher ® pressure washers!
Part No. 9.558-998.0
25 Ft. Extension High-Pressure
Hose
Extension Hose for all Kärcher ® high pressure washers between the original equipment hose and gun up to 2000 PSI.
Part No. 2.642-588.0
66" Extension Wand (Four piece)
Need to clean second story windows or
other high areas? Increase the reach
of your pressure washer by up to 66"
with this extension kit. Includes 4 aluminum sections for variable length. 66"
fully assembled. Fits most Kärcher ®
pressure washers up to 2300 PSI.
(bayonet)
Part No. 2.640-746.0
Rotating Wash Brush (bayonet)
For more effortless cleaning of all
smooth surfaces (painted, glass and
plastic) try the Kärcher ® Rotating Wash
Brush. Use it on your automobile,
house siding or windows. The water
pressure from your pressure washer
causes the inner brushes to gently
spin, making your cleaning job much
easier. The angle of brush head is adjustable to help you reach difficult areas. Excellent for the application of
detergent. A must-have accessory designed for Kärcher ® pressure washers
up to 2300 PSI. (bayonet)
Part No. 2.640-743.0
Soft Clean Washing Brush
Made with soft bristles that will not
harm painted surfaces. Easily attaches
directly to the trigger gun. Ideal for
stubborn dirt on cars, boats, patio furniture and other surfaces. Great for applying detergent. Fits most Kärcher ®
pressure washers up to 2300 PSI.
(bayonet)
Part No. 2.640-740.0
25 ft. Pipe Cleaning Kit (bayonet)
Need to clean blocked pipes, drains or
downspouts? The Kärcher ® pipe
cleaning kit is the answer! The pipe
cleaner propels itself forward while simultaneously flushing out debris. For
example, insert the cleaning nozzle in
the base of a downspout, pull the trigger on the pressure washer gun and
watch as the nozzle shoots out leaves
and other debris while climbing upward. Connects directly to the trigger
gun of most Kärcher ® pressure washers up to 2300 PSI. (bayonet)
Part No. 2.640-747.0
Wet Sandblasting Kit (bayonet)
Why spend hours stripping old paint
and rust by hand using harsh chemicals? Let the Kärcher ® Wet Sandblasting Kit do the work! Attach the kit to
your pressure washer, add abrasive
English 17
material and attack the rust and paint
with our eco-friendly alternative. Fits
most Kärcher ® pressure washers up to
2300 PSI. (bayonet)
Part No. 2.638-792.0
Detergent Foamer Attachment
Ideal for applications which require a
thick foam. Simply fill the resevoir cup
with liquid pressure washer detergent
to generate a foam spray. Connects directly to the trigger gun. Fits most
Kärcher ® pressure washers up to
2300 PSI. (bayonet)
Part No. 6.964-507.0
T 200 Wide Area Surface Cleaner
For cleaning surfaces such as patios,
terraces and driveways without splashback, there is no better solution than
the Kärcher ® T 200. It saves time by
cleaning a one foot wide area gently as
it hovers, providing consistent, streakfree cleaning. When you finish cleaning the patio and driveway, remove the
wand and use the handle to clean garage doors and other vertical surfaces.
Includes two nozzles which spin at
high speed for optimum results. Our
top selling accessory for Kärcher ®
pressure washers up to 2300 PSI.
(bayonet)
Part No. 2.642-188.0
18 English
TROUBLESHOOTING
CAUTION
Symptom Cause Solution
Motor will not start On/Off switch is in the “OFF”
(0) position.
Power cord is not plugged in. Plug in power cord.
Electrical outlet does not
supply adequate power.
Tripped GFCI plug. Press “RESET” button on GFCI
Tripped circuit breaker. Switch off pressure washer.
Unit does not
reach high pressure.
Output pressure varies high and low.
Diameter of garden hose is too small.
Water supply is restricted. Check garden hose for kinks,
Not enough inlet water supply.
Water inlet filter is clogged. Remove filter and rinse out in
Spray wand is on low pressure position.
Not enough inlet water supply.
Pump is sucking air. Check that hoses and fittings
Water inlet filter is clogged. Remove filter and rinse out in
Discharge nozzle is obstructed.
Calcified gun, hose or spray wand.
Disconnect the machine from the power source before making any repair.
Turn switch to the “ON” (I) position
Try a different outlet.
plug.
The reset comes automatically
once the temperature of the
unit drops.
Replace with a 5/8 inch or larger garden hose.
leaks and blockage.
Open water source full force.
warm water.
Turn spray wand to high pres-
sure position.
Turn water on full force. Check
garden hose for kinks, leaks or
blockage.
are air tight. Turn off machine
and purge pump by squeezing
trigger gun until a steady flow of
water emerges through the
nozzle.
warm water.
Blow out or remove debris with
a fine needle.
Run distilled vinegar through
detergent suction tube.
English 19
Symptom Cause Solution
No detergent. Detergent suction tube not
properly connected to the
machine.
Detergent is too thick. Dilute detergent, for best re-
Filter on detergent suction tube is clogged.
Damaged or clogged detergent suction tube.
Spray wand is in high pressure position.
Discharge nozzle is obstructed.
Garden hose connection leaks.
Spray wand leaks. Spray wand not properly at-
Pump is noisy. Pump is sucking air. Check that hoses and fittings
Water leaks from pump (up to 10 drops per minute is permissible).
Oil Drip. Oil seals are damaged or
Loose fittings. Tighten fittings. Missing/worn rubber washer. Insert new washer.
tached.
Broken o-ring or plastic insert.
Loose fittings. Check that all fittings are tight. Water seals are damaged or
worn.
worn.
Check connection.
sults use Kärcher ® detergent.
Run warm water through filter
to remove debris.
Remove obstruction or replace
detergent suction tube.
Turn spray wand tip to low
pressure position.
Blow out or remove debris with
fine needle.
Insert the spray wand into the trigger gun. Carefully press in against the spring tension and twist into the locked position.
Call Customer Support
are air tight. Turn off machine
and purge pump by squeezing
trigger gun until a steady flow of
water emerges through the
nozzle.
Call Customer Support
Call Customer Support
If you encounter any additional difficulties not listed, please visit our website.
USA / Canada:
www.karcher-help.com
México:
www.karcher.com.mx
20 English
Loading...