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9.800-080.0-BY 02/04/25
HDS Series
Hot Water - Gas Powered - Diesel Heated Operator Manual
English 02
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W
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SU
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R
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p
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ll
co
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an
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of
f
t
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gr
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.
K
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p
sp
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away
fr
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.
R
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QU
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'
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T
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fi
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N
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ja
m
a
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p
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'
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su
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l
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.
R
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G
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Ó
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M
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a
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.
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.
D
A
N
G
E
R
8.9
23
-
560
.
0
L
I
S
T
E
D
®
2 Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
Machine Data Label
MODELS:
HDS 3.9/30 Pe Cage
1.575-600.0
HDS 4.8/30 Pe Cage
1.575-601.0
HDS 4.8/30 Pe Cage
1.575-602.0
HDS 4.7/35 Pe Cage
1.575-603.0
HDS 4.7/35 Pe Cage
1.575-604.0
HDS 5.6/35 Pe Cage
1.575-605.0
HDS 5.6/35 Pe Cage
1.575-606.0
HDS 8.0/30 Ge Cage
1.575-611.0
HDS 8.0/30 Ge Cage
1.575-612.0
HDS 4.7/35 Pe Cage
1.110-627.0
HDS 5.6/35 Pe Cage
1.110-628.0
HDS 8.0/30 Ge Cage
1.110-629.0
3
Table of Contents
Machine Data Label . . . . . . . . . . . . . . . . . . . . . . . . . .2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
How To Use This Manual . . . . . . . . . . . . . . . . . . . . .4
Safety
Introduction & Safety Information . . . . . . . . . . . . . . .5
Important Safety Information. . . . . . . . . . . . . . . . . . .6
Operations
Component Identification . . . . . . . . . . . . . . . . . . . . .9
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .10
Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . .11
Operating Instructions. . . . . . . . . . . . . . . . . . . . . . .12
Detergents & General Cleaning Techniques . . . . .14
Thermal Pump Protection . . . . . . . . . . . . . . . . . . . .14
Cleaning Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Rinsing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Shutting Down And
Clean Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Maintenance
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Engine Maintenance . . . . . . . . . . . . . . . . . . . . . . . .16
Preventative Maintenance . . . . . . . . . . . . . . . . . . .16
Maintenance And Service . . . . . . . . . . . . . . . . . . . . 17
Unloader Valves . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Winterizing Procedure. . . . . . . . . . . . . . . . . . . . . . .17
High Limit Hot Water Thermostat . . . . . . . . . . . . . .17
Pumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Cleaning of Coils. . . . . . . . . . . . . . . . . . . . . . . . . . .17
Rupture Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Burner Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Electrode Setting. . . . . . . . . . . . . . . . . . . . . . . . . . .18
Oil Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Burner Air Adjustment. . . . . . . . . . . . . . . . . . . . . . .19
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . .20
Oil Change Record . . . . . . . . . . . . . . . . . . . . . . . . .21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Ka
rcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
4
How To Use This Manual
This manual contains the following sections:
• How to Use This Manual
• Safety
• Operations
• Maintenance
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 model and serial number will be found on a decal
attached to the pressure washer.
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
• Engine Maintenance
• Preventative Maintenance
• Maintenance And Service
• Unloader Valves
• Winterizing Procedure
• High Limit Hot Water Thermostat
• Pumps
• Cleaning of Coils
• Rupture Disk
•Fuel
• Burner Nozzle
• Electrode Setting
• Kärcher ClearFire Oil Burner
• Burner Air Adjustment
• Preventative Maintenance
• Maintenance
• Troubleshooting
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:
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
5
Safety
Introduction & Safety Information
Thank you for purchasing this 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 opera-
tors.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
6
Safety
Important Safety Information
WARNING: To reduce the risk of
injury, read operating instructions
carefully before using.
AVERTISSEMENT: Pour réduire le
risque de blessures, lire attentive-
ment les instructions de
fonctionnement avant l'utilisation.
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.
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
pourraient survenir.
4. All installations must comply with
local codes. Contact your electrician, plumber,
utility company or the selling dealer for specific
details.
WARNING: This machine exceeds
85 db appropriate ear protection
must be worn.
AVERTISSEMENT: Cette machine
excède XX dB et une protection de
l'ouïe appropriée doit être portée.
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'émission d'autres
particules dans l'air et leur Pour éviter les lésions
corporelles, une protection des yeux, du visage,
des mains et des pieds doit être portée lors de
l'utilisation de cet équipement. projection à hautes
vitesses.
5. Always wear properly rated eye protection such as
safety goggles or face shield while spraying.
(Safety glasses do not provide full protection.)
6. Keep operating area clear of all persons.
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'explo-
sion - Utiliser uniquement dans
des endroits où l'utilisation d'une
flamme nue ou d'une torche est
permise.
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
fonc tionner 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.
WARNING: Risk of fire — Do not spray flammable
liquids.
AVERTISSEMENT: Risque d'incendie - Ne pas
pulvériser de liquides inflammables.
7. Allow engine to cool for 1-2 minutes before refu-
eling. If any fuel is spilled, make sure the area is dry
before testing the spark plug or starting the engine.
(Fire and/or explosion may occur if this is not done.)
Gasoline engines on mobile or portable equipment
shall be refueled:
a. outdoors;
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
DANGER
KEEP WATER
SPRAY AWAY FROM
ELECTRICAL WIRING.
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
OPERATIONS
SAFETY
MAINTENANCE
WARNING
EAR PROTECTION
MUST BE WORN
WARNING
USE PROTECTIVE
EYE WEAR
AND CLOTHING
WHEN OPERATING
THIS EQUIPMENT.
WARNING
RISK OF EXPLOSION:
OPERATE ONLY WHERE
OPEN FLAME OR TORCH
IS PERMITTED
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.
7
Safety
b. with the engine on the equipment stopped;
c. with no source of ignition within 10 feet of the
dispensing point; and
d. with an allowance made for expansion of the fuel
should the equipment be exposed to a higher
ambient temperature.
In an overfilling situation, additional precautions are
necessary to ensure that the situation is handled in
a safe manner.
WARNING: Risk of injury. Disconnect battery
ground terminal before servicing.
AVERTISSEMENT: Risqué de blessure. Débrancher
la borne de mise à la terre de la batterie avant de
procéder à des opérations d'entretien.
8. When in use, do not place machine near flammable
objects as the engine is hot.
9. 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.
10. Use No. 1 or No. 2 heating oil (ASTM D306) only.
NEVER use gasoline in your fuel oil tank. Gasoline
is more combustible than fuel oil and could result in
a serious explosion. NEVER use crankcase or
waste oil in your burner. Fuel unit malfunction could
result from contamination.
11. Do not confuse gasoline and fuel oil tanks. Keep
proper fuel in proper tank.
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: Risqué de
blessure. Les surfaces chaudes
peuvent causer des brûlures.
Utiliser uniquement les zones de
prise désignées du pistolet pulvérisateur et de la
lance. Ne pas placer les mains ou les pieds sur des
endroits non isolés de la laveuse à pression.
12. Transport/Repair with fuel tank EMPTY or with fuel
shut-off valve OFF.
CAUTION: Hot discharge fluid. Do
not touch or direct discharge
stream at persons or animals or
severe injury or death will result.
ATTENTION:
Liquide de décharge
chaud. 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: 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 protéger
l'opérateur.
13. 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.
14. Never make adjustments on machine while in oper-
ation.
15. 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 oper-
ating. 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. Faire preuve de prudence lors de l'utilisation.
Ne pas décharger directement le jet vers des
personnes ou des animaux, car cela risquerait de
causer des blessures graves ou même la mort.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
WARNING
RISK OF INJURY.
HOT SURFACES
CAN CAUSE BURNS
CAUTION
HOT DISCHARGE FLUID:
DO NOT TOUCH OR
DIRECT DISCHARGE
STEAM AT PERSONS.
WARNING
TRIGGER GUN KICKS
BACK — HOLD WITH
BOTH HANDS
WARNING
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
WARNING
HIGH PRESSURE
STREAM CAN PIERCE
SKIN AND TISSUES.
8
Safety
WARNING: Protect machine from
freezing.
AVERTISSEMENT:
Protéger la
machine contre le gel.
16. 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.
17. Inlet water must be clean fresh water and no hotter
then 90°F.
DANGER: Risk of asphyxiation.
Do not inhale fumes. Use this
product only in a well ventilated
area.
DANGER:
Risque d'asphyxie: Ne
pas inhaler les vapeurs. Utiliser
ce produit uniquement dans un
endroit bien ventilé.
18. Running this product indoors
can result in death due to
carbon monoxide, a poison gas you cannot see or
smell. Never operate indoors, even if windows and
doors are open. Only use outdoors and far away
from windows, doors and openings or vents.
19. Manufacturer will not be liable for any changes
made to our standard machines or any components
not purchased from us.
20. The best insurance against an accident is
precaution and knowledge of the machine.
WARNING: Be extremely careful
when using a ladder, scaffolding
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 relativement
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.
21. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
22. Never run pump dry or leave spray gun closed
longer than 1-2 minutes.
23. Machines with shut-off spray gun should not be
operated with the spray gun in the off position for
extensive periods of time as this may cause
damage to the pump.
24. Protect discharge hose from vehicle traffic and
sharp objects. Inspect condition of high pressure
hose before using or bodily injury may result.
25. Before disconnecting discharge hose from water
outlet, turn burner off and open spray gun to allow
water to cool below 100° before stopping the
machine. Then open the spray gun to relieve
pressure. Failure to properly cool down or maintain
the heating coil may result in a steam explosion.
26. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
27. Do not operate this machine when fatigued or
under the influence of alcohol, prescription medica-
tions, or drugs.
28. 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: Do not spray machine
or any people, animals or elec-
trical parts.
AVERTISSEMENT: Ne pas
vaporiser sur la machine ou les
gens, les animaux ou les pièces
électriques
Follow the maintenance instructions
specified in the manual.
Suivre les instructions d'entretien
spécifiées dans le manuel.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
WARNING
DO NOT SPRAY
MACHINE OR ANY
PEOPLE, ANIMALS OR
ELECTRICAL PARTS.
WARNING
PROCTECT FROM
FREEZING
WARNING
RISK OF INJURY
FROM FALLS WHEN
USING LADDER.
DANGER
RISK OF
ASPHYXIATION.
USE THIS PRODUCT
ONLY IN A WELL
VENTILATED AREA.
9
Operations
Component Identification
Pump — Delivers a specific gpm to the high pressure
nozzle which develops pressure.
Starter Grip— Used for starting the engine
manually.
Spray Gun — Controls the application of water and
detergent onto cleaning surface with trigger device.
Includes safety latch.
Unloader Valve— Safety device which allows
pressure to be released when spray gun is closed.
High Pressure Hose — Connect one end to water
pump discharge nipple and the other end to spray gun.
Adjustable Thermostat — Safety control which
prevents temperatures from going above adjustable
setting.
Wand — Must be connected to the spray gun.
NOTE: If trigger on spray gun is released for more
than 2 minutes, warm water will discharge from pump
protector onto floor. This system prevents internal
pump damage.
NOTE: If flue adapter is installed, the burner
assembly air adjustment must be adjusted.
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D
AN
G
E
R
8
.9
2
3
-
5
6
0
.0
Outlet
High
Pressure
Hose
22mm
Coupling
Wand
Spray Gun
Trigger
Power
Nozzle
Burner Fuel
Tank
Water
Supply Hose
(not included)
Flue Adapter
Optional 7-10049
Insulation Gasket
Optional 7-01471
Burner
Switch
Hour Meter
Adjustable
Thermostat
Starter Grip
Unloader Valve
Detergent
Valve
Pump
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
10
Operations
Assembly Instructions
STEP 1: Attach wand and hose to
the spray gun using teflon tape on
threads to prevent leakage.
CAUTION: Never replace nozzles
without engaging the safety
latch on the spray gun trigger.
ATTENTION: Ne jamais
remplacer les buses sans
d'abord mettre le dispositif de
sécurité sur la détente du
pistolet pulvérisateur.
STEP 4: Connect the high pressure
hose to the pump discharge fitting.
Thread twist connect to discharge
fitting by turning clockwise.
STEP 2: Connect garden hose to
the cold water source.
STEP 5: Check inlet filters, remove
debris, then connect the water
supply hose to the float tank inlet
swivel connector and turn on water
supply.
CAUTION: Do not run the pump
without water or pump damage
will result.
ATTENTION: Ne pas faire
fonctionner la pompe sans eau
ou des dégâts de pompe se
produiront
STEP 3: Remove shipping cap and
install oil dipstick (Depending on
type of shipping, dipstick may
already be installed). Check pump
oil level by using dipstick or
observe oil level in oil window (if
equipped). Use SAE 10W-40
weight oil, non-foaming oil.
Note: Before installing pressure
nozzle in wand coupler, run
machine allowing water to flush
through the system until clear.
STEP 6: Remove wand end and
first place the o-ring followed by the
high pressure nozzle as shown.
Replace end of wand.
Spray
Gun
High
Pressure
Hose
Safety Latch
Wand
Pump
Discharge
Cold
Water
Source
Garden
Hose
Water
Inlet
Inlet
Filter
Garden
Hose
Wand
High Pressure
Nozzle
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
11
Operations
Battery Installation
Due to Federal Regulations concerning shipment of corrosive chemicals,
batteries are not shipped with this machine.
Local purchase of battery will be the responsibility of the owner. Automotive type 12 Volt Group 24 battery is recom-
mended for placement within the weather resistant box. Follow safety and installation instructions furnished with the
battery.
Red Cable is attached to battery (+) positive terminal,
black cable is connected to battery (-) negative terminal.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
SHIELD
EYES
EXPLOSIVE
GASES
CAN CAUSE
BLINDNESS OR INJURY
NO
SPARKS
FLAMES
SMOKING
SULFURIC
ACID
CAN CAUSE
BLINDNESS OR
SEVERE BURNS
FLUSH EYES
IMMEDIATELY
WITH WATER
GET
MEDICAL
HELP
FAST
KEEP OUT OF THE REACH OF CHILDREN. DO NOT TIP
. KEEP VENT CAPS TIGHT AND LEVEL.
DANGER
/
POISON
Black - Negative
Terminal
Red + Positive
Terminal
12
Operations
Operating Instructions
STEP 3: Connect garden hose to
the cold water source and turn
water on completely. Never use hot
water.
STEP 2: Fill gas tank with unleaded
gasoline. Do not use leaded
gasoline.
STEP 4: Before installing pressure
nozzle, trigger spray gun to
eliminate trapped pressure. Then
run machine, allowing water to
flush through the system until clear.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
Oil
Dipstick
Gas
Tank
STEP 1: Check engine oil level. Oil level should be level to the fill markings
on the dipstick. Be sure the machine is level when checking the oil level.
(Refer to the engine's operating manual included with machine.) We
recommend that the oil be changed after the first 5 hours of use, then once
every 100 hours. NOTE: Improper oil levels will cause low oil sensor to shut
off engine. IMPORTANT! Do not run engine with high or low oil levels
as this will cause engine damage.
STEP 5: Pull the choke lever out to the "Choke"
position (on a warm engine, leave the choke lever
in the run position). Push the choke lever to the
"Closed" position. To restart a warm engine, leave
the choke lever in the "Open" position.
STEP 6:
(Electric Start
Models with
Pull Start) Pull
the starter grip.
If the engine
fails to start
after 2 pulls,
squeeze the
trigger gun to
release pressure and repeat step. Return starter gently. After
the engine warms up enough to run smoothly, move choke
to run position and throttle to fast position.
WARNING: Starter cord kickback (rapid retraction) can
result in bodily injury. Kickback will pull hand and arm
toward engine faster than you can let go. ALWAYS
relieve spray gun pressure before pulling starter card.
Pull starter cord slowly until resistance is felt, then pull
rapidly.
Choke
Lever
Cold
Water
Source
Garden
Hose
13
STEP 9: Turn the burner switch
“ON”. Turn thermostat dial to the
210° mark.
STEP 10: (Pump Steam Option)
A. Operate machine as instructed.
B. Open steam valve counterclock-
wise, which will lower
pressure.
C. Turn thermostat knob to 250°F.
D. When steam is no longer
desired, Turn steam valve
clockwise and thermostat knob to
200°F.
WARNING! Never replace
nozzle without engaging the
safety latch on the spray gun
trigger.
AVERTISSEMENT: Ne jamais
remplacer les buses sans
d'abord mettre le dispositif de
sécurité sur la détente du
pistolet pulvérisateur.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
AVERTISSEMENT: Le retour du cordon de lancement
(rétraction rapide) peut causer des lésions corporelles.
La rétraction rapide de la corde du démarreur (recul)
attire la main et le bras vers le moteur plus vite qu'il
n'est possible de lâcher la corde. Toujours réduire la
pression du pistolet pulvérisateur avant de tirer sur le
cordon de lancement. Tirer lentement sur le cordon de
lancement jusqu'à ce qu'une résistance soit sentie,
puis tirer rapidement.
On-Off
Switch
STEP 7: (Electric Start Models) Turn the engine
switch to "Start" position.
ON
OFF
START
Engine
Switch
STEP 8: (Electric Start Models) Turn the key to the
START position, and hold it there until the engine
starts. If the engine fails to start within 5 seconds,
release the key, and wait at least 10 seconds before
operating the starter again.
Using the electric starter for more than 5
seconds at a time will overheat the starter motor
and can damage it.
When the engine starts, release the key, allowing it
to return to the ON position. If the choke knob has
been pulled to the CLOSED position to start the
engine, gradually push it to the OPEN position as
the engine warms up.
Thermostat
Burner
Switch
Steam
Valve
Safety
Latch
14
Operations
Detergents & General Cleaning
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: 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 2: Open detergent metering valve.
STEP 3: Detergent will be drawn
into the pump and coil and
discharged under pressure. Never
use anything that will damage the
pump and coil.
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.
IMPORTANT: You must flush the detergent from your
machine after each use by placing the suction tube
into a bucket of clean water and then running the
pressure washer for 1-2 minutes.
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.
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 overlapping 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 products 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.
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.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
WARNING
Detergent
Valve
15
Operations
Shutting Down And
Clean Up
STEP 1: Remove detergent suction
tube from container and insert into
one gallon of fresh water. Open
detergent metering valve. Pull
trigger on spray gun and siphon
water for one minute. Close
detergent valve. Turn burner switch
off and continue spraying, allowing
the water to cool to below 100°F
.
STEP 4: Press trigger to release
water pressure
STEP 7: Disconnect the high
pressure hose from high
pressure outlet.
STEP 2: Turn off the engine.
STEP 5: Disconnect the garden
hose from the water inlet on the
machine.
STEP 3: Turn off water supply.
STEP 6: Engage the spray gun
safety lock.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
On-Off
Switch
Safety
Latch
High Pressure
Outlet
Garden
Hose
Water
Inlet
16
Maintenance
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.
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 engine off immediately.
4. Drain the gas and oil from the engine.
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 engine oil to upper level.
2. Drain gasoline from fuel tank, fuel line, fuel valve
and carburetor.
3. Pour about one teaspoon of engine oil through the
spark plug hole, pull the starter grip several times
and replace the plug. Then pull the starter grip
slowly until you feel increased pressure which
indicates the piston is on its compression stroke
and leave it in that position. This closes both the
intake and exhaust valves to prevent rusting of
cylinder.
4. Cover pressure washer and store in a clean, dry
place that is well ventilated away from open flame
or sparks. NOTE: Use of a fuel additive, such as
STA-BIL
®
, or an equivalent, will minimize the
formulation of fuel deposits during storage. Such
additives may be added to the gasoline in the fuel
tank of the engine, or to the gasoline in a storage
container.
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.
Engine Maintenance
During the winter months, rare atmospheric conditions
may develop which will cause an icing condition in the
carburetor. If this develops, the engine may run rough,
lose power and may stall. This temporary condition can
be overcome by deflecting some of the hot air from the
engine over the carburetor area. NOTE: Refer to the
engine manufacturer's manual for service and mainte-
nance of the engine.
Preventative Maintenance
1. Check to see that water pump is properly lubri-
cated.
2. Follow winterizing instructions to prevent freeze
damage to pump and coils.
3. Always neutralize and flush detergent from system
after use.
4. If water is known to have high mineral content, use
a water softener in your water system, or de-scale
as needed.
5. Do not allow acidic, caustic or abrasive fluids to be
pumped through system.
6. Always use high grade quality cleaning products.
7. Never run pump dry for extended periods of time.
8. Use clean fuel: kerosene, No. 1 fuel oil, or diesel.
Clean or replace fuel filter every 100 hours of oper-
ation. Avoid water contaminated fuel as it will
damage the fuel pump.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, not letting water reach
maximum operating temperature.
10. Never allow water to be sprayed on or near engine
or burner assembly or any electrical component.
11. Periodically descale coils as per instructions.
12. Check to see that engine is properly lubricated.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
17
Maintenance
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 flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
The area around the pressure washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
Maintenance And Service
Unloader Valves
Unloader valves are preset and tested at the factory
before shipping. Occasional adjustment of the unloader
may be necessary to maintain correct pressure.
Adjusting Unloader Valves
Tampering with the factory setting 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
and water in the float tank. Turn the engine on to siphon
the anti-freeze mixture through the machine. If
compressed air is available, an air fitting can be
screwed into the float tank by removing the float tank
strainer and fitting. Then inject the compressed air.
Water will be blown out of the machine when the trigger
on the spray gun is opened.
High Limit Hot Water Thermostat
For safety, each machine is equipped with a tempera-
ture sensitive high limit control switch. In the event that
the water should exceed its operating temperature, the
high limit control will turn the burner off until the water
cools then it will automatically reset itself. The thermo-
stat sensor is located on the discharge side of the
heating coil. The thermostat control dial is located on
the control panel.
Pumps
Before running the pump check the pump crankcase for
a proper oil level. A proper oil level is indicated by the
red dot in the sightglass or between the high and low
marks on the dipstick. Use only SAE 10W-40 non-
foaming oil. Change the initial oil after the first 50 hours
and then change the oil every 500 hours or every year.
When draining oil, clean inside of crankcase to remove
all impurities.
CAUTION: When operating in damp places or with
high temperature fluctuations oil must be changed
immediately.
ATTENTION: Lorsque l'appareil est utilisé dans des
endroits humides ou où les températures fluctuent
fortement, l'huile doit être changée
immédiatement.
Cleaning of Coils
In alkaline water areas, lime deposits can accumulate
rapidly inside the heating coil. This growth is increased
by the extreme heat build up in the coil. The best
preventative for liming conditions is to use high quality
cleaning detergents. In areas where alkaline water is
an extreme problem, periodic use of Kärcher Coil
Descaler (part #9.803-742.0) will remove lime and
other deposits before coil becomes plugged.
Periodic descaling of the heating coil is recom-
mended so please consult your local Kärcher
dealer for instructions.
Removal of Soot from 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 following
the coil removal steps (See Coil Removal section).
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 disk ruptures it will need to be replaced.he
Rupture Disk should be replaced every two years.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
18
Maintenance
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 No.1 or No 2 Heating Oil (ASTM D306) only.
NEVER use gasoline in your burner fuel tank. Gasoline
is more combustible than fuel oil and could result in a
serious explosion. NEVER use crankcase or waste oil
in your burner. Fuel unit malfunction could result from
contamination.
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. The solenoid, which is normally closed, is
activated by a flow switch when water flows through it.
When the operator releases the trigger on the spray
gun, the flow of water through the flow switch stops,
turning off the electrical current to 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 instantaneous burn-or-no-burn situ-
ation, thereby eliminating high and low water tempera-
tures and the combustion smoke normally associated
with machines incorporating a spray gun. Periodic
inspection, to insure that the fuel solenoid valve
functions properly, is recommended. This can be done
by operating the machine and checking to see that the
burner is not firing when the spray gun is in the OFF
position.
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.
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.
Electrode Setting
Oil Burner
Burner 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.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
19
Maintenance
Burner 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.
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
ATTENTION: Si de la fumée blanche s'échappe de
l'évacuation du brûleur pendant le démarrage ou le
fonctionnement, cesser d'utiliser et réajuster les
bandes d'air.
NOTE: If a flue is installed, have a professional
serviceman adjust your burner for a #1 or #2 smoke
spot on the Bacharach scale. If the desired position
cannot be obtained using only the air shutter, lock the
air shutter in as close a position as can be obtained,
then repeat the above procedure on the air band
setting.
Coil Removal
Removal of coil because of freeze breakage, or to
clean soot from it can be done quickly and easily.
1. Disconnect hose from pump to inlet side of the coil.
2. Carefully disconnect the thermostat sensor making
sure you do not crimp the capillary tube.
3. Remove burner assembly from combustion
chamber.
4. Remove the 3-3/8" bolts from each side of coil and
tank assembly (these bolts are used to fasten tank
to chassis).
5. Remove fittings connected to the 1/2" pipe nipples
from inlet and discharge sides of coil.
6. Remove top tank wrap, bend back insulation tabs
and fold back blanket.
7. Remove bolts that hold down coil to bottom wrap.
8. Remove coil.
9. Replace or repair any insulation found to be torn or
broken.
10. Remove insulation retainer plates.
Coil Reinstallation
Reinstall new or cleaned coil by reversing Steps 9
through 1.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
20
Maintenance
Preventive 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 dealer for mainte-
nance. Regular preventative maintenance will add many hours to the life of your pressure washer. Perform
maintenance more often under severe conditions.
Check pump oil level before first use of your new pressure washer. Change pump oil after first 50 hours and
every year or 500 hours thereafter. Use SAE 10W-40 weight oil, non-foaming.
Refer to the engine's operating manual included with machine for recommended engine oil.
Maintenance Operation
Every 8 Hrs
or Daily
25 Hrs or
Weekly
50 Hrs or
Monthly
100 Hrs or Yearly Yearly
Check Oil
Pump X
Engine X
Change Oil
Pump X
Engine X
Air Cleaner Check Clean
Spark Plug X
Check Valve Clearance X
Fuel Tank Filter X
Water Filter/Clean Check X
Rupture Disk Replace every 2 years
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
21
Maintenance
Oil Change Record
PUMP OIL
D a t e O i l C h a n g e d
Month/Day/Year
Estimated Operating
Hours Since Last Oil
Change
ENGINE OIL
D a t e O i l C h a n g e d
Month/Day/Year
Estimated Operating
Hours Since Last Oil
Change
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
22
Maintenance
Troubleshooting
PROBLEM
POSSIBLE CAUSE
SOLUTION
LOW
OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger supply hose; clean filter at water inlet.
Old, worn or incorrect spray nozzle
Match nozzle number to machine and/or replace
with new nozzle.
Belt slippage Tighten or replace; use correct belt.
Plumbing or hose leak
Check plumbing system for leaks. Retape leaks
with teflon tape.
Faulty or misadjusted unloader valve
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 and discharge valves.
Worn inlet or discharge valves Replace with valve kit.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve Rebuild or replace as needed.
Slow engine RPM Set engine speed at proper specifications.
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.
BURNER
WILL NOT
LIGHT
Little or no fuel Fill tank with fuel.
Improper fuel or water in fuel Drain fuel tank and fill with proper fuel.
Clogged fuel line Clean or replace.
Plugged fuel filter Replace as needed.
Misadjusted burner air bands Readjust air bands for clean burn.
Little or no fuel pressure from fuel
pump
Increase fuel pressure to specification and/or
replace fuel pump. Test with pressure gauge.
Faulty burner transformer
Test transformer for proper arc between
contacts. Replace as needed.
(continued on
next page)
Disconnected or short in electrical
wiring
All wire contacts should be clean and tight. No
breaks in wire.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
23
Maintenance
PROBLEM
POSSIBLE CAUSE
SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
Flex coupling slipping on fuel
pump shaft or burner motor shaft
Replace if needed.
On-Off switch defective
Check for electrical current reaching burner assembly
with burner switch on.
Heavy sooting on coil and burner
can cause interruption of air flow
and shorting of electrodes
Clean as required.
Improper electrode setting
Check and reset according to diagram in Operator's
Manual.
Fuel not reaching combustion
chamber
Check fuel pump for proper flow.
Check solenoid flow switch on machines with spray
gun control, for proper on-off fuel flow control.
Clogged burner nozzle Clean as required.
Thermostat faulty or slow engine
speed
Increase engine RPM to increase voltage.
Flow switch malfunction Remove, test for continuity and replace as needed.
Flow solenoid malfunction Replace if needed.
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.
Gasoline engine altitude
The gasoline engine is preset for operation at altitudes
below 1000 ft above sea level.
If operated at higher altitudes, it may be necessary to
install a high altitude main jet in the carburetor. Contact
your local authorized engine sales and service center
for details.
MACHINE
SMOKES
WHILE
BURNER UNIT
IS RUNNING
OR
UNIT SMOKES AT
COLD-START
ONLY WHEN
BURNER
IS OFF
Improper fuel or water in fuel Drain tank and replace contaminated fuel
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
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
24
Maintenance
PROBLEM POSSIBLE CAUSE
SOLUTION
LOW
WATER
TEMPERATURE
Improper fuel or water in fuel Replace with clean and proper fuel.
Low fuel pressure Increase fuel pressure.
Weak fuel pump
Check fuel pump pressure. Replace pump if
needed.
Fuel filter partially clogged Replace as needed.
Soot build-up on coils not allowing
heat transfer
Clean coils.
Improper burner nozzle See specifications.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm or
hot
Lower incoming water temperature.
Fuel pump pressure too high See specifications for proper fuel pressure.
Fuel pump defective Replace fuel pump.
Detergent line sucking air
Tighten all clamps. Check detergent
lines for holes.
Defective temperature switch Replace.
Incorrect fuel nozzle size See specifications for proper fuel nozzle.
Insufficient water supplied Check water G.P.M. to machine.
Restricted water flow Check nozzle for obstruction, proper size.
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.
PRESENCE
OF WATER
IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
WATER
DRIPPING
FROM
UNDER PUMP
Piston packing worn Check and replace if necessary.
O-Ring plunger retainer worn Check and replace if necessary.
Cracked piston Check and replace if necessary.
Pump protector
Lower water supply pressure. Do not run
with spray gun closed longer than 2 minutes
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
25
Maintenance
PROBLEM POSSIBLE CAUSE
SOLUTION
OIL
DRIPPING
Oil seal worn Check and replace if necessary.
EXCESSIVE
VIBRATION IN
DELIVERY LINE
Irregular functioning of the valves Check and replace if necessary.
DETERGENT
NOT DRAWING
Air leak
Tighten all clamps. Check detergent lines for
holes.
Restrictor in float tank is missing
Replace restrictor. Check for proper orifice in
restrictor.
Filter 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.
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.
Nozzle incorrectly sized
Check and replace if necessary
(See serial plate for proper size).
Unloader valve seat faulty Check and replace if necessary.
Worn piston packing Check and replace if necessary.
BURNER
MOTOR WILL
NOT RUN
Fuel pump seized Replace fuel pump.
Burner fan loose or misaligned Position correctly, tighten set screw.
Defective control switch Replace switch.
Loose wire Check and replace or tighten wiring.
Defective burner motor Replace motor.
RELIEF VALVE
LEAKS WATER
Relief valve defective Replace or repair.
Karcher HDS 600-612 Operator’s Manual 9.800-080.0 - BY
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Aurora, CO 80019
Phone: +1 800 444-7654
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