K 3.79 M
High Pressure Washer
Operator Manual
Overview ................................................. 2
Precautions ........................................ 3 - 4
Assembly Instructions ............................ 4
Operating Instructions ............................ 5
Using the Accessories ........................... 6
Working with Detergents ......................... 7
Shut Down and Clean-Up ........................ 8
Taking a Break ........................................ 8
Winterizing andLong-Term
Storage .............................................. 8 - 9
Cleaning Tips ................................... 9 - 10
Optional Cleaning Accessories .............10
Troubleshooting ................................ 11-12
F
F
O
O/
Specifications
ON
I/
Working Pressure ...................... 9000 kPa
............................................... 1300 PSI
Max. Pressure............................ 1500 PSI
Max. Water volume ..................... 1.6 GPM
Voltage ............................................. 120 V
Amp draw ................................... 13 AMPS
Please keep the original box, packaging and receipt.
Before operating this unit, please read this manual thoroughly and
retain it for future reference.
Part No. 1.423-922.0
Manual Part No. 5.961-170.0 11/03EN
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IMPORTANT PRECAUTIONS – Read First!
Extension Cords
Safety Warnings
Use a sufficient gauge:
When using this product basic precautions
Up to 25 ft = 12/3 AWG.
25 to 50 ft =10/3 AWG.
Use only extension cords that are intended for
should always be followed:
• Read all the instructions before using the
product.
outdoor use. These extension cords are
identified by a marking “Acceptable for use
with outdoor appliances; store indoors while
not in use.” Use only extension cords having
an electrical rating not less than the rating of
the product. Do not use damaged extension
cords. Examine extension cord before using
and replace if damaged. Do not abuse
extension cord and do not yank on any cord
to disconnect. Keep cord away from heat and
sharp edges. Always disconnect the extension
cord from the receptacle before disconnecting
the product from the extension cord. If you are
using an extension cord, it should always be
completely unwound from the cable drum.
• High pressure jets can be dangerous if
subject to misuse. The jet must not be
directed at persons, animals, electrical
devices, or the machine itself.
• To reduce the risk of injury, do not operate
the machine near children.
• Learn how to stop the machine and release
pressure quickly. Be thoroughly familiar with
the controls.
• Stay alert — watch what you are doing.
• Wear safety goggles.
• Do not use acids, solvents, or any other
flammable material in this product. These
products can cause physical injuries to the
operator and irreversible damage to the
machine.
• Do not operate the product when fatigued
or under the influence of alcohol or drugs.
• Do not stand on unstable surfaces. Stand
with both feet balanced at all times.
• To reduce the risk of electrocution, keep all
connections dry and off the ground. Do not
touch plug with wet hands.
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.
3
• The Trigger Gun Safety Lock PREVENTS the
trigger from accidentally being engaged.
This safety feature DOES NOT lock trigger
in the on position.
DANGER- Improper connection of the
equipment-grounding 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.
WARNING
• DO NOT SPRAY ELECTRICAL APPARATUS
AND WIRING.
•
DO NOT USE WITH FLAMMABLE LIQUIDS AND
TOXICCHEMICALS
•
INJECTION HAZARD: EQUIPMENT CAN CAUSE
SERIOUS INJURY IF THE SPRAY PENETRATES
THE SKIN. DO NOT POINT THE GUN AT ANYONE
OR ANY PART OF THE BODY. IN CASE OF
PENETRATION SEEK MEDICAL AID IMMEDIA-
TELY.
Caution
• Follow the maintenance instructions
specified in the manual.
•
•
THIS SYSTEM IS CAPABLE OF PRODUCING
9000 KPA (1300 PSI). TO AVOID RUPTURE
AND INJURY, DO NOT OPERATE THIS PUMP
WITH COMPONENTS RATED LESS THAN
9000 KPA (1300 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.
• This machine has been designed for use
with cleaning detergent supplied
or recommended by the manufacturer.
The use of other cleaning detergents
may affect the operation of the machine
and void the warranty.
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IMPORTANT PRECAUTIONS – continued
• Never use the pressure washer to draw in
water contaminated with solvents, e.g.
paint thinners, gasoline, oil, etc.
Water Supply (Cold Water Only)
• Water hose must be at least 1/2 inch or
5/8 inch in diameter.
NOTE: Dirt in the feed water will
damage the unit. To avoid this risk,
we recommend fitting a water filter.
• Flow rate of water supply must not fall
below 2 GPM (gallons per minute).
• Flow rate can be determined by running the
water for one minute into an empty
5-gallon container.
• Always prevent debris from being drawn
into the unit by using a clean water source
and an accessory water filter if required.
• The water supply temperature must not
exceed 104°F/40°C.
Save these instructions!
ASSEMBLY INSTRUCTIONS
!
4
Step 1
Step 2
Step 3
5
Step 5
Step 4
Pull out the locking slide from the right side of the
trigger gun handle (A), and insert the small end of the
high pressure hose into place (B). Push the locking
slide back into the trigger gun to lock the hose in
position.
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OPERATING INSTRUCTIONS
Step 2
Insert the spray wand of your choice into the
trigger gun. Press in against the spring
tension and twist into the locked position.
Step 1
Connect the high pressure hose to the high
pressure outlet.
5
Step 4
Connect garden hose to the cold water
source and turn water on completely.
Plug the power cord into the power outlet.
Step 3
Connect the garden hose to the water inlet.
O/OFF
O
O
N
N
/
I/
I
Step 6
Step 5
Turn on the pressure washer (I). The motor
starts only if the trigger of the gun is
pulled and shuts off when the trigger is
released.
Unlock the lock of the trigger gun (A). Trigger
the gun (B) to eliminate trapped air, wait for a
steady flow of water to emerge from the
spray nozzle.
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USING THE ACCESSORIES
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 (+).
To apply detergent, the wand must be positioned to the low pressure setting (-).
For lower
pressure turn
wand collar in the
minus (–) direction.
For higher
pressure turn
wand collar in the
plus (+) direction.
Rotary spray wand
Warning
This wand features a 0º pencil jet which
rotates 360º for maximum dirt cutting action,
effectively increasing cleaning performance
up to 50%. This wand combines the cleaning
performance of a 0º pencil jet with the
surface coverage of a wide angle nozzle. Not
recommended for soft materials, siding,
painted surfaces, decks or autos.
TO AVOID SERIOUS INJURY, NEVER
POINT SPRAY NOZZLE AT YOURSELF,
OTHER PERSONS OR ANIMALS
6
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WORKING WITH DETERGENTS
To apply detergents you must be operating at low pressure (–).
Step 1
Install the Vario power spray wand. Set the wand to the low pressure setting (–) by turning the
wand collar.
Note: The wand must be set in the low pressure (–) position to apply detergents.
7
Step 2
Step 3
Fill detergent tank with 1.0 L of Kärcher
detergent.
Turn on the pressure washer. 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.
For best results see Cleaning Tips on pages 9 & 10 for specific
information on how to clean different surfaces.
Always Use Kärcher Detergents for Best
Results.
The following Kärcher detergents are
available:
Kärcher biodegradable detergents are
specially formulated to protect the environment
and your pressure washer. 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 call:
• Pressure Wash
• Deck + Fence Wash
•Degreaser
• Vehicle Wash
Caution
• Bleach, Chlorine products and other
corrosive chemicals
Never use:
• Liquids containing solvents
(i.e., paint thinners, gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
1-800-465-4980
• Acid-based products
These chemicals will harm the unit and
will damage the surface being cleaned.
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SHUTTING DOWN & CLEAN-UP
OFF
/
O
ON
/
I
Step 1
Step 2
Step 3
Turn the switch to off (O)
position and unplug cord
from outlet.
Turn off the water
source.
Press trigger to release
water pressure.
A
B
8
Step 4
Step 5
Step 6
Disconnect the garden hose from
the water inlet on the unit.
Disconnect the high pressure hose Release trigger (A)
from the high pressure outlet.
and engage gun
safety lock (B).
TAKING A BREAK... five minutes or more
A
OFF
/
O
Step 1
Release trigger (A)
and engage gun
safety lock (B).
Step 2
ON
Turn pressure washer
to off (O) position.
B
/
I
WINTERIZING AND LONG-TERM STORAGE
1. Disconnect all water connections.
4. Store the machine and accessories in
a room which does not reach freezing
temperatures. DO NOT store near
furnance or other sources of heat as it
may dry out the pump seals.
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.
Caution: Failure to follow the above
directions will result in damage to the pump
assembly and accessories.
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WINTERIZING AND LONG-TERM STORAGE – continued
6) Cleaning the
5) Cleaning the
detergent inlet filter
Pull it out and rinse out
in warm water.
water inlet filter
Pull out the water in-
let filter with flat-nose
pliers and rinse out in
warm water.
Maintenance
The unit is
maintenance-free.
CLEANING TIPS
Deck Cleaning
Cement Patios, Brick and
(with or without detergent)
Stone
Pre-rinse deck and surrounding area with
fresh water. If using Kärcher Deck + Fence
Wash, apply to surface at low pressure. For
best results, limit your work area to smaller
sections of approximately 25 square feet.
Allow Deck Wash 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.
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If
using Kärcher Pressure Wash or Degreaser,
apply to surface at low pressure. For best
results, limit your work area to smaller
sections of approximately 25 square feet.
Allow Pressure Wash 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.
9
For removing extremely stubborn stains,
use the rotary spray wand.
Caution: Do not use rotary spray wand on
wood surfaces as it may cause damage.
Cars, Boats & Motorcycles
(with or without detergent)
Pre-rinse vehicle with fresh water. If using
Kärcher Vehicle Wash, 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, 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.
House Siding
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If
using Kärcher Pressure Wash, 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
Pressure Wash 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.
Caution: Do not use the rotary spray
wand on vehicles as it may cause
damage.
Caution: Do not use rotary spray wand on
siding as it may cause damage.
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CLEANING TIPS – continued
Wash 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.
Barbecue Grills, Outdoor
Power Equipment &
Gardening Tools
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If
using Kärcher Pressure Wash or Degreaser,
apply detergent at low pressure. Allow
Pressure Wash 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.
Caution: Do not use rotary spray wand
on patio or lawn furniture as it may cause
damage.
Recommendations
• Before cleaning any surface an
inconspicuous area should be cleaned to
test spray pattern and distance for
maximum cleaning results.
Caution: Do not use rotary spray wand on
cloth, plastic or other sensitive surfaces
as it may cause damage.
• If painted surfaces are peeling or
chipping, use extreme caution as
pressure washer may remove the loose
paint from the surface.
Patio & Lawn Furniture
(with or without detergent)
• When using on surfaces which might
come in contact with food, flush surfaces
with plenty of drinking water.
Pre-rinse furniture and surrounding area with
fresh water. If using Pressure Wash, apply to
surface at low pressure. Allow Pressure
10
OPTIONAL CLEANING ACCESSORIES
Optional cleaning accessories are available to further enhance your cleaning capabilities: For
• Rotating Wash Brush
• Wash Brush
• Underbody Wand
• Pipe Drain Cleaner
• Sandblasting Attachment
• Extension wand
• Water Siphon Kit
• 25’ Extension Hose
• T-Racer
KÄRCHER 2 YEAR WARRANTY
KÄRCHER CANADA INC. warrants to the original owner that this product shall be free from
defects in material and workmanship for two years from the date of its original purchase. If
such a defect appears during the warranty period, upon presentation of proof of purchase,
KÄRCHER CANADA INC. will repair or replace (at its option) your product without charge.
This warranty does not cover accidental damage, unreasonable use, normal wear and tear,
loss of use or other consequential damages, nor does it cover repairs made or attempted by
unauthorized persons.
Trigger gun, hose, spray wands and other accessories are warranted for 3 months.
Please note that no returns will be accepted without prior authorization from our customer
service department.
It is the owner’s responsibility to file claims for damage caused by public transportation
carriers directly with the carrier concerned.
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TROUBLESHOOTING
Disconnect the machine from the power source before making any repair.
Symptom
Cause
Solution
Motor will not start.
On/Off switch is in the “OFF” (O)
position.
Turn switch to the “ON” (I) position
Power cord is not plugged in.
Extension cord is too long.
Plug in power cord.
Replace extension cord with either
Extension cord is not proper gauge. a 25 ft. 12/3 gauge cord or a 50
Extension cord is damaged.
ft. 10/3 gauge cord.
Electrical outlet does not supply
adequate power.
Try a different outlet.
Unit does not reach high
pressure.
Diameter of garden hose is too
small.
Replace with a 1/2 inch or 5/8 inch
garden hose.
Water supply is restricted.
Check garden hose for kinks, leaks
and blockage.
Not enough inlet water supply.
Water inlet filter is clogged.
Open water source full force.
11
Remove filter and rinse out in
warm water.
Spray wand is on low pressure
position.
Turn spray wand to high pressure
position.
Output pressure varies high
and low.
Not enough inlet water supply.
Turn water on full force. Check
garden hose for kinks, leaks or
blockage.
Pump is sucking air.
Check that hoses and fittings are
air tight. Turn off machine and
purge pump by squeezing trigger
gun until a steady flow of water
emerges through the nozzle.
Water inlet filter is clogged.
Remove filter and rinse out in
warm water.
Discharge nozzle is obstructed.
Calcified gun, hose or spray wand.
Blow out or remove debris with a
fine needle.
Run distilled vinegar through
detergent tank.
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TROUBLESHOOTING – continued
Symptom
Cause
Solution
No detergent.
Detergent is too thick.
Dilute detergent.
Spray wand is in high pressure
position.
Turn spray wand tip to low
pressure position.
Discharge nozzle is obstructed.
Blow out or remove debris with a
fine needle.
Spray wand leaks.
Pump is noisy.
Spray wand not properly attached. Insert the spray wand into the
trigger gun. Carefully press in
against the spring tension and twist
into the locked position.
Broken o-ring or plastic insert.
Pump is sucking air.
Call Customer Service.
Check that hoses and fittings are
air tight. Turn off machine and
purge pump by squeezing trigger
gun until a steady flow of water
emerges through the nozzle.
12
Water leaks from pump
(up to 10 drops per minute
is permissible).
Loose fittings.
Check that all fittings are tight.
Water seals are damaged or worn. Call Customer Service.
Oil seals are damaged or worn.
Call Customer Service.
Oil Drips.
1-800-537-4129
If you encounter any additional difficulties not listed, please call Customer Service
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