Stihl RE 90.0 PLUS User manual

RE 90.0 PLUS
2 - 22 Instruction Manual

Contents
1 Introduction................................................. 2
2 Guide to Using this Manual.........................2
3 Overview..................................................... 3
4 Safety Precautions......................................4
5 Preparing the pressure washer for operation
.................................................................. 10
6 Assembling the pressure washer..............10
7 Connecting to a water source................... 12
8 Connecting the pressure washer to the
power supply.............................................14
9 Switching the pressure washer on and off 14
10 Operating the pressure washer.................14
11 After Finishing Work..................................16
12 Transporting..............................................17
13 Storing.......................................................17
14 Cleaning....................................................17
15 Maintenance............................................. 18
16 Repairing...................................................18
17 Troubleshooting........................................ 18
18 Specifications............................................20
19 Spare Parts and Accessories....................21
20 Disposal.................................................... 21
21 EC Declaration of Conformity................... 21
1 Introduction
Dear Customer,
Thank you for choosing STIHL. We develop and
manufacture our quality products to meet our
customers’ requirements. The products are
designed for reliability even under extreme con‐
ditions.
STIHL also stands for premium service quality.
Our dealers guarantee competent advice and
instruction as well as comprehensive service
support.
STIHL expressly commit themselves to a sus‐
tainable and responsible handling of natural
resources. This user manual is intended to help
you use your STIHL product safely and in an
environmentally friendly manner over a long
service life.
We thank you for your confidence in us and hope
you will enjoy working with your STIHL product.
Dr. Nikolas Stihl
IMPORTANT! READ BEFORE USING AND
KEEP IN A SAFE PLACE FOR REFERENCE.
2 Guide to Using this Manual
2.1 Applicable documents
The local safety regulations apply.
► In addition to this Instruction Manual please
read the following documents, make sure you
have understood them and keep them in a
safe place for future reference:
–Instruction Manual and packaging of the
accessory used
–Instruction Manual and packaging of the
detergent used
2.2 Warning Notices in Text
DANGER
■ This notice refers to risks which result in seri‐
ous or fatal injury.
► Serious or fatal injuries can be avoided by
taking the precautions mentioned.
WARNING
■ This notice refers to risks which can result in
serious or fatal injury.
► Serious or fatal injuries can be avoided by
taking the precautions mentioned.
NOTICE
■ This notice refers to risks which can result in
damage to property.
► Damage to property can be avoided by tak‐
ing the precautions mentioned.
2.3 Symbols in Text
This symbol refers to a chapter in this
instruction manual.
English
2 0458-003-8321-B
© ANDREAS STIHL AG & Co. KG 2022
0458-003-8321-B. VA0.E22.
Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
Translation of Original Instruction Manual 0000009570_004_GB

3 Overview
3.1 High-pressure washer
6
3
10
13
11
4
15
2
3
1
9
8
7
#
5
12
14
0000097544_002
1 Handle
The handle is used when carrying and mov‐
ing the high-pressure washer.
2 Holders
The holder is used for storing the spray gun.
3 Holders
The holder is used for storing the spray
attachment.
4 Rocker switch
The rocker switch is used to switch the high-
pressure washer on and off.
5 Carrying handle
The carrying handle is used to carry the high-
pressure washer.
6 Crank handle
The crank handle is used to turn the hose
reel.
7 Holders
The holder can be rotated; it serves to
remove and store the connecting cable.
8 Mains plug
The mains plug connects the connecting
cable to a socket.
9 Connecting cable
The connecting cable connects the high-pres‐
sure washer to the mains plug.
10 Connector
The connector is used to connect the water
hose.
11 Compartments
The compartments are used to store the sup‐
plied nozzles.
12 Holders
The holder is used to store the spraying set.
13 High-pressure hose
The high-pressure hose transports the water
from the high-pressure pump to the spray
gun.
14 Hose reel
The hose reel is used to roll up the high-pres‐
sure hose.
15 Connector
The connector connects the high-pressure
hose with the spray gun.
# Rating plate with machine number
3.2 Spray attachment
6
5
4
3
2
1
7
10 8
9
11
0000097571_002
1 Spray lance
The spray lance connects the spray gun to
the nozzle.
2 Spray gun
The spray gun is used to hold and control the
spray attachment.
3 Trigger
The trigger opens and closes the valve in the
spray gun. The trigger starts and stops the
water jet.
4 Retaining latch
The retaining latch releases the trigger.
5 Locking lever
The locking lever holds the connector in the
spray gun.
6 Cleaning pin
The cleaning pin is used to clean the nozzles.
3 Overview English
0458-003-8321-B 3

7Spraying set1
The spraying set is used when cleaning with
detergents.
8 Spray nozzle
The spray nozzle adds the detergent to the
water.
9 Bottle
The bottle contains the detergent.
10 Rotary nozzle
The rotary nozzle creates a strong, rotating
water jet.
11 Fan-jet nozzle
The fan-jet nozzle produces a flat jet of water.
3.3 Symbols
The symbols may appear on the pressure
washer, the spray attachment or the spraying
set. Their meaning is as follows:
In this position the retaining latch unlocks
the lever.
In this position the retaining latch locks the
lever.
Drain the spraying set before transport
or secure it so that it cannot topple
over and cannot move.
Do not dispose of product with the house‐
hold refuse.
L
W
A
Guaranteed sound power level in
accordance with Directive 2000/14/EC
in dB(A) so that noise levels of different
products can be compared.
These symbols denote original STIHL
spare parts and original STIHL acces‐
sories.
4 Safety Precautions
4.1 Warning Symbols
The warning symbols on the high-pressure
washer have the following meanings:
Observe safety notices and take the
necessary precautions.
Read, understand and keep the User
Manual.
Wear safety glasses.
–Do not direct the water jet at
people and animals.
–Do not direct the water jet at
electrical systems, electrical
connections, sockets and live
cables.
–Do not direct the water jet at
electrical appliances and the
high-pressure washer itself.
If the connecting cable or the extension
cord is damaged: Unplug the mains
plug from the socket.
Do not connect the high-pressure
washer directly to the drinking water
main.
Switch off high-pressure washer during
breaks from operation and before
transport, storage, servicing or repair.
Do not use, transport and store the
high-pressure washers at temperatures
below 0 °C.
4.2 Intended Use
The STIHL RE 90.0 PLUS high-pressure washer
can be used to clean vehicles, trailers, patios,
paths and facades, for example.
The high-pressure washer is not suitable for
commercial use.
The high-pressure washer must not be used in
the rain.
WARNING
■Using the high-pressure washer other than for
its intended use can result in serious injuries
or death and damage to property.
►Always use the high-pressure washer as
described in this user manual.
The STIHL RE 90.0 PLUS high-pressure washer
is not designed to be used for:
–Cleaning asbestos cement and similar surfa‐
ces
–Cleaning surfaces painted or varnished with
paints containing lead
–Cleaning surfaces which come into contact
with foodstuffs
–Cleaning the high-pressure washer itself
1Included in scope of delivery, depending on the version and market
English 4 Safety Precautions
4 0458-003-8321-B

4.3 Requirements concerning the
user
WARNING
■Users who have not received instruction are
not aware of and cannot assess the dangers
of the pressure washer. The user or other peo‐
ple may be seriously injured or killed.
► Read the Instruction Manual, make
sure you have understood it and
keep it in a safe place for reference.
► If allowing another person to use the pres‐
sure washer: Give them the Instruction
Manual as well.
►Make sure that the user fulfills the following
requirements:
–The user is rested.
–This machine must not be
used by persons (including
children) with reduced
physical, sensory or men‐
tal capabilities or lack of
experience and knowl‐
edge.
–The user can identify and assess the
dangers of the pressure washer.
–The user is of legal age or
the user is trained in a pro‐
fession in accordance with
national regulations under
supervision.
–The user has received
instruction from a STIHL
servicing dealer or other
expert before operating
the pressure washer for
the first time.
–The user is not under the influence of
alcohol, medicines or drugs.
►If in any doubt: Contact a STIHL servicing
dealer.
4.4 Clothing and equipment
WARNING
■Objects may be thrown into the air at high
speed while working. The user may be injured.
► Wear close fitting safety glasses.
Suitable safety glasses tested to
standard EN 166 or national stand‐
ards and bearing the corresponding
mark are available to buy.
►Wear a long sleeved, close fitting top and
long trousers.
■ Spray (aerosols) may form while operating.
Breathing in aerosols can be harmful to health
and trigger allergic reactions.
►Carry out a risk assessment according to
the surface to be cleaned and the surround‐
ing area.
►If the risk assessment shows formation of
aerosols: Wear a respirator of protection
class FFP2 or equivalent protection class.
■Wearing unsuitable footwear can cause the
user to slip and fall. The user may be injured.
► Wear sturdy, enclosed footwear with non-
slip soles.
4.5 Work area and surroundings
WARNING
■Bystanders, children and animals are not
aware of the dangers of the pressure washer
and objects being thrown into the air and can‐
not assess them. Bystanders, children and
animals may be seriously injured and property
may be damaged.
►Keep bystanders, children
and animals away from the
work area.
►Do not leave the pressure
washer unattended.
►Ensure that children cannot
play with the pressure
washer.
■If you work in the rain or in a damp environ‐
ment, an electric shock may occur. The user
may be seriously injured or killed and the pres‐
sure washer may be damaged.
►Do not use in rain.
► Position the pressure washer so that it will
not be wet by dripping water.
► Position the pressure washer outside the
wet work area.
4 Safety Precautions English
0458-003-8321-B 5

■ Electrical components of the pressure washer
can produce sparks. Sparks can cause fires
and explosions in a flammable or explosive
environment. This can result in serious injuries
or death and damage to property.
►Do not work in a flammable environment or
in an explosive environment.
4.6 Safe condition
The high-pressure washer is in a safe condition if
the following conditions are fulfilled:
–The high-pressure washer is undamaged.
–The high-pressure hose, the handle, the cou‐
plings and the spray attachment are undam‐
aged.
–The handle and the spray attachment are cor‐
rectly attached.
–The connecting cable, the extension cord and
their plugs are undamaged.
–The high-pressure washer is clean and dry.
–The spray attachment is clean.
–The controls function properly and have not
been modified.
–An original STIHL accessory for this high-pres‐
sure washer is fitted.
–The accessories are correctly attached.
WARNING
■If not in safe condition, components may no
longer operate correctly and safety devices
may be disabled. This may result in serous or
fatal injury to people.
►Never use a damaged high-pressure
washer.
► Work with an undamaged high-pressure
hose, an undamaged handle, undamaged
couplings and an undamaged spray attach‐
ment.
►Always attach the handle and the spray
attachment as described in this Instruction
Manual.
►Never use a damaged connecting cable,
extension cord or mains plug.
► If the high-pressure washer is dirty or wet:
clean the high-pressure washer and allow it
to dry.
►If the spray attachment is dirty: Clean the
spray attachment.
► Do not modify the high-pressure washer.
► If the controls do not work: Do not operate
the high-pressure washer.
► Fit original STIHL accessories for this high-
pressure washer.
► Attach accessories as described in this
User Manual or in the User Manual for the
accessories.
►Do not insert objects into the openings in
the high-pressure washer.
► Replace worn or damaged labels.
► If you have any doubts, be sure to consult a
STIHL dealer.
4.7 Working
WARNING
■ In certain situations, the user may no longer
be able to concentrate on their work. This may
result in the user stumbling, falling and suffer‐
ing serious injury.
►Keep calm and plan your work.
► In poor light conditions and poor visibility:
Do not operate the high-pressure washer.
► Use the high-pressure washer on your own.
► Watch out for obstacles.
► Work standing on the ground and keep your
balance. If you have to work at a height:
Use a mobile elevating work platform or
secure scaffolding.
►If you start feeling fatigue: Take a break.
■ If the high-pressure washer starts behaving
differently or in an unusual way while operat‐
ing, the high-pressure washer may be in an
unsafe condition. This may result in serious
injury to people and damage to property.
►Stop working, unplug the mains plug from
the socket and consult a STIHL dealer.
► The high-pressure washer must always be
operated in an upright position.
► To ensure an adequate exchange of cool‐
ing air, do not cover the high-pressure
washer.
■When the spray gun trigger is released, the
high-pressure pump switches off automatically
and water stops flowing out of the nozzle. The
high-pressure washer is then in stand-by
mode and is still switched on. If the spray gun
trigger is squeezed, the high-pressure pump
switches on again automatically and water
flows out of the nozzle. This may result in seri‐
ous injury to people and damage to property.
► When not operating the machine: Lock the
spray gun trigger.
► Switch off the high-pressure washer.
► Unplug the mains plug of the high-pressure
washer from the socket.
■ At temperatures below 0° C water can freeze
on the surface to be cleaned and in the com‐
ponents of the high-pressure washer. The
user may slip, fall and be seriously injured.
Damage to property may occur.
English 4 Safety Precautions
6 0458-003-8321-B

► Do not use the high-pressure washer at
temperatures below 0° C.
■ Pulling on the high-pressure hose, water hose
or connecting cable can cause the high-pres‐
sure washer to move and topple over. Dam‐
age to property may occur.
►Do not pull on the high-pressure hose,
water hose or connecting cable.
■ If the high-pressure washer is placed on a
sloping, uneven or soft surface it may move
and topple over. Damage to property may
occur.
►Place the high-pressure washer on a hori‐
zontal, flat, hard surface.
■ If working at a height, the high-pressure
washer or the spray attachment may fall to the
ground. This may result in serious injury to
people and damage to property.
►Use a lift bucket or secure scaffolding.
► Do not place the high-pressure washer in a
lift bucket or on scaffolding.
► If the high-pressure hose does not have
sufficient reach: Extend the high-pressure
hose by connecting a high-pressure hose
extension.
►Secure the spray attachment so that it can‐
not fall.
■ The water jet may detach asbestos fibers from
surfaces. Asbestos fibers may spread through
the air after drying and be breathed in. Breath‐
ing in asbestos fibers can be harmful to health.
►Do not clean surfaces containing asbestos.
■ The water jet may remove oil from vehicles or
machinery. The oily water may enter the soil,
the water system or the drains. That would
create an environmental hazard.
►Vehicles or machinery should only be
cleaned at places where there is an oil trap
in the water drain.
■In combination with leaded paint the water jet
can form leaded aerosols and leaded water.
Leaded aerosols and leaded water may enter
the soil, the water system or the drains. Inhal‐
ing aerosols can be harmful to health and trig‐
ger allergic reactions. That would create an
environmental hazard.
►Do not clean surfaces that are painted or
lacquered with leaded paint.
■ The water jet can damage sensitive surfaces.
Damage to property may occur.
► Do not clean sensitive surfaces with the
rotary nozzle.
► Sensitive surfaces made of rubber, fabric,
wood and similar materials should be
cleaned at a lower operating pressure and
from a greater distance.
■If while in use the rotary nozzle is immersed in
dirty water and then operated, the rotary noz‐
zle may be damaged.
►Do not use the rotary nozzle with dirty
water.
► If cleaning a container: Empty the container
and allow the water to flow away while
cleaning it.
■Easily combustible and explosive liquids that
are sucked in can cause fires and explosions.
Persons may be seriously or fatally injured
and property may be damaged.
►Do not suck in or spread easily combustible
or explosive liquids.
■ Drawing in irritant, corrosive and toxic liquids
can endanger health and damage components
of the high-pressure washer. Persons may be
seriously or fatally injured and property may
be damaged.
►Do not suck in or spread irritating, caustic
or toxic liquids.
■ The strong water jet can seriously injure peo‐
ple and animals and cause damage to prop‐
erty.
► Do not direct the water jet at
people and animals.
► Do not direct the water jet at places that are
not fully visible.
► Do not use the water jet to clean clothing
while wearing it.
► Do not use the water jet to clean shoes or
boots while wearing them.
■ If electrical equipment, electrical connections,
sockets and live power cords come into con‐
tact with water, electric shock may result. Per‐
sons may be seriously or fatally injured and
property may be damaged.
► Do not direct the water jet at
electrical systems, electrical
connections, sockets and live
cables.
►Do not direct the water jet at the connecting
cable or extension cable.
■ If electrical appliances or the high-pressure
washer come into contact with water, electric
shock may result. The user may be seriously
injured or killed and property may be dam‐
aged.
► Do not direct the water jet at
electrical appliances and the
high-pressure washer itself.
4 Safety Precautions English
0458-003-8321-B 7

► Keep electrical appliances and the high-
pressure washer away from the surface to
be cleaned.
■An incorrectly routed high-pressure hose may
suffer damage. As a result of the damage,
water under high pressure may escape uncon‐
trolled into the surrounding area. This may
result in serious injury to people and damage
to property.
►Do not direct the water jet at the high-pres‐
sure hose.
► Route the high-pressure hose so that it is
not under tension or tangled.
► Route the high-pressure hose so that it will
not be damaged, kinked or crushed, or cha‐
fed.
►Protect the high-pressure hose from heat,
oil and chemicals.
■ An incorrectly routed water hose may suffer
damage and people may trip over it. People
may be injured and the water hose may be
damaged.
►Do not direct the water jet at the water
hose.
► Route and mark the water hose so that
people will not trip over it.
► Route the water hose so that it is not under
tension or tangled.
► Route the water hose so that it will not be
damaged, kinked or crushed, or chafed.
► Protect the water hose from heat, oil and
chemicals.
■ The strong water jet produces reactive forces.
The user may lose control of the spraying sys‐
tem due to the reaction forces that occur. The
user may be seriously injured and property
damage may occur.
►Hold the spray gun with both hands.
► Work as described in this user manual.
4.8 Detergents
WARNING
■If detergents come into contact with the skin or
eyes, the skin or eyes may be irritated.
► Observe the user manual for the detergent.
► Avoid contact with detergents.
► If skin contact occurs: Wash affected areas
of skin with plenty of water and soap.
► If eye contact occurs: Flush eyes with
plenty of water for at least 15 minutes and
consult a doctor.
■Using the wrong or inappropriate detergent
can damage the pressure washer or the sur‐
face of the object being cleaned and be harm‐
ful to the environment.
►STIHL recommends the use of genuine
STIHL detergents.
► Observe the user manual for the detergent.
► If you have any doubts, be sure to consult a
STIHL dealer.
4.9 Connecting the water supply
WARNING
■ Releasing the spray gun trigger causes a kick‐
back in the water hose. A kickback can force
dirty water back into the drinking water main.
This can pollute the drinking water.
► Do not connect the high-pressure
washer directly to the drinking water
main.
► Observe the regulations of the water supply
company. If required, use proper system
separation (e.g. backflow preventer) when
connecting to the drinking water system.
■Dirty or sandy water can damage components
of the pressure washer.
► Use clean water.
► If using dirty or sandy water: Use a water fil‐
ter with the pressure washer.
■ If the water supply to the pressure washer is
insufficient, components of the pressure
washer may be damaged.
►Turn tap fully on.
► Make sure there is a sufficient supply of
water to the pressure washer, 18.
4.10 Connecting to the power supply
Contact with live parts can occur for the following
reasons:
–The connecting cord or the extension cord is
damaged.
–The mains plug of the connecting cord or
extension cord is damaged.
–The socket is not properly installed.
DANGER
■Contact with live parts can result in electric
shock. The user may be seriously injured or
killed.
►Make sure that the connecting cord, exten‐
sion cord and their plugs are undamaged.
If the connecting cord or the extension
cord is damaged:
► Do not touch the damaged areas.
► Unplug the mains plug from the
socket.
►Make sure your hands are dry before touch‐
ing the connecting cord, extension cord or
plugs.
English 4 Safety Precautions
8 0458-003-8321-B

► Plug the mains plug of the connecting cord
or extension cord into a properly installed,
fused socket with the correct fuse rating.
►The mains connection must be carried out
by a qualified electrician and meet the
requirements of IEC 60364-1. It is recom‐
mended that the power supply to this
machine should either be connected via an
earth leakage circuit breaker, which inter‐
rupts the power supply as soon as the leak‐
age current to earth exceeds 30 mA for 30
ms, or has an earth tester.
■ A damaged or unsuitable extension cord can
result in electric shock. People can be seri‐
ously injured or killed.
►Use an extension cord with the correct
cross-section, 18.2.
► Only use an extension cord which is splash-
proof and approved for outdoor use.
► Use an extension cord that has the same
characteristics as the connecting cord of
the pressure washer, 18.2.
►It is recommended to use a cable reel that
holds the socket at least 60 mm above the
floor.
WARNING
■ During operation, an incorrect mains voltage
or incorrect mains frequency may result in an
overvoltage in the pressure washer. The pres‐
sure washer may be damaged.
►Make sure that the mains voltage and the
mains frequency of the power supply match
the data on the rating plate of the pressure
washer.
■Electrical components may be overloaded dur‐
ing operation if more than one electric power
tool is connected to a multiple socket. The
electrical components may heat up and a fire
may break out. This can result in serious inju‐
ries or death and damage to property.
►Only ever connect one pressure washer to
one socket.
► Do not connect pressure washers to multi‐
ple sockets.
■ An incorrectly routed connecting cord or
extension cord may be damaged and people
may trip over it. People may be injured and the
connecting cord or extension cord may be
damaged.
►Route the connecting cord and extension
cord so that the water jet cannot touch
them.
►Route and mark the connecting cord and
extension cord so that people will not trip
over them.
►Route the connecting cord and extension
cord so that they are not under tension or
tangled.
►Route the connecting cord and extension
cord so that they will not be damaged,
kinked or crushed and will not be chafed.
►Protect the connecting cord and extension
cord from heat, oil and chemicals.
► Lay the connecting cord and extension cord
on a dry surface.
■ The extension cord warms up in operation. If
that heat cannot escape, it may cause a fire.
► If using a cable reel: Completely unroll the
cable reel.
4.11 Transport
WARNING
■ The pressure washer may topple over or move
during transport. This can result in injuries and
damage to property.
►Lock the spray gun trigger.
► Switch off pressure washer.
► Unplug the mains plug of the pressure
washer from the socket.
► Drain the spraying set or secure it so
that it cannot topple over and cannot
move.
► Secure the pressure washer with lashing
straps, belts or a net so that it cannot topple
over and cannot move.
■At temperatures below 0° C water can freeze
in the components of the pressure washer.
The pressure washer may be damaged.
►Drain high-pressure hose and spray attach‐
ment.
► If the pressure washer cannot be
protected from frost in transport:
Protect the pressure washer with
glycol-based antifreeze.
4.12 Storage
WARNING
■Children are not aware of and cannot assess
the dangers of the pressure washer. Children
can be seriously injured.
►Lock spray gun trigger.
► Switch off pressure washer.
4 Safety Precautions English
0458-003-8321-B 9

► Unplug the mains plug of the pressure
washer from the socket.
► Store the pressure washer out of the reach
of children.
■ Moisture may cause the electrical contacts on
the pressure washer and metal components to
corrode. The pressure washer may be dam‐
aged.
►Store the pressure washer in a clean, dry
state.
■ At temperatures below 0 °C water may freeze
in components of the pressure washer. The
pressure washer may be damaged.
►Drain high-pressure hose and spray attach‐
ment.
► If the pressure washer cannot be
stored in a frost-free environment:
Protect the pressure washer using
a glycol-based antifreeze.
4.13 Cleaning, Maintenance and
Repair
WARNING
■ If the mains plug is plugged into a socket
when carrying out cleaning, servicing or
repairs, it is possible that the high-pressure
washer may be switched on inadvertently.
This may result in serious injury to people and
damage to property.
►Lock the spray gun trigger.
► Switch off the high-pressure washer.
► Unplug the mains plug of the high-pressure
washer from the socket.
■ Harsh detergents, cleaning with a water jet or
sharp objects can damage the high-pressure
washer. If the high-pressure washer is not
properly cleaned, parts may not function prop‐
erly and safety devices can be disabled. They
may cause serious injury to persons.
►Always clean the high-pressure washer as
described in this user manual.
■ If the high-pressure washer is not properly
serviced or repaired, parts may not function
properly and safety devices can be disabled.
This may result in serous or fatal injury to peo‐
ple.
►Do not attempt to service or repair the high-
pressure washer yourself.
► If the connecting cable is faulty or dam‐
aged: Have the connecting cable replaced
by a STIHL dealer.
►If the high-pressure washer needs to be
serviced or repaired: Contact a STIHL
dealer.
5 Preparing the pressure
washer for operation
5.1 Making the pressure washer
ready for use.
The following steps must be performed before
commencing work:
► Make sure that the pressure washer, the high-
pressure hose, the hose coupling and the con‐
necting cord are in a safe condition, 4.6.
►Cleaning the pressure washer, 14.
► If using a water filter: Check the water filter for
dirt and clean it if it is dirty, 14.4.
► Set up the pressure washer on a firm and level
base, where it will not slide or tip over.
►Unroll high-pressure hose from hose reel,
10.2.
►Connect spray gun, 6.2.
►Fit spray lance, 6.3.
►If using a nozzle: Attaching the nozzle,
6.4.1.
► If using detergent: Using detergent and the
spraying set, 10.5.
►Connect water supply, 7.
►Connect pressure washer to power supply,
8.1.
► If it is not possible to carry out these steps: Do
not use the pressure washer. Consult a STIHL
servicing dealer.
6 Assembling the pressure
washer
6.1 Assembling the high-pressure
washer
Installing handle with hose reel
3
1
2
0000098902_001
► Slide the handle (1) onto the holder (2).
English 5 Preparing the pressure washer for operation
10 0458-003-8321-B

► Insert screws (3) and tighten.
Connecting the hose reel
1
2
3
4
0000098487_001
► Fit the connecting piece (1) into the coupling
(2).
The connector (1) engages with an audible
click.
► Secure the cover (3) with the screw (4).
Installing the holder
2
1
0000097543_001
► Suspend the holder (1) into the guides (2).
The holder (1) engages with an audible click.
Inserting nozzles
0000-GXX-6395-A0
2
1
► Insert fan-jet nozzle (1) and rotary nozzle (2).
Attaching spraying set
0000097562_001
1
► Insert spraying set (1).
6.2 Attaching and removing the
spray gun
6.2.1 Attaching the spray gun
2
1
0000097566_001
► Slide the connector (2) into the spray gun (1).
The connector (2) engages with an audible
click.
► If the connector (2) cannot be easily pushed
into the spray gun (1): Grease the gasket on
the connector (2) with grease for fittings.
6.2.2 Removing the spray gun
2
1
0000097567_002
► Press and hold the locking lever (1).
► Pull out the connector (2).
6.3 Attaching and removing the
spray lance
6.3.1 Attaching the spray lance
0000-GXX-4350-A0
1
2
► Push spray lance (1) into spray gun (2).
► Twist the spray lance (1) until it engages.
► If the spray lance (1) cannot be pushed easily
into the spray gun (2): Grease the gasket on
the spray lance (1) with grease for fittings.
6 Assembling the pressure washer English
0458-003-8321-B 11

6.3.2 Removing the spray lance
0000-GXX-4351-A0
21
► Squeeze spray lance (1) and spray gun (2)
together and twist as far as they will go.
► Pull spray lance (1) and spray gun (2) apart.
6.4 Attaching and removing the
nozzle
6.4.1 Attaching the Nozzle
2
1
0000098881_001
► Push nozzle (1) onto the spray lance (2).
► Turn the nozzle (1) until it engages
► If the nozzle (1) cannot be pushed easily into
the spray lance (2): Grease the gasket on the
nozzle (1) with grease for fittings.
6.4.2 Removing the nozzle
2
1
0000098882_001
► Press nozzle (1) and spray lance (2) together
and turn until stop.
► Pull nozzle (1) and spray lance (2) apart.
7 Connecting to a water
source
7.1 Connecting the high-pressure
washer to the mains water sup‐
ply
Connecting the water filter
If the high-pressure washer is operated with
sandy water or water from cisterns, a water filter
must be connected to the high-pressure washer.
The water filter filters sand and dirt out of the
water and thus protects the components of the
high-pressure washer from damage.
Depending on the market, the water filter may be
included with the high-pressure washer.
► Unscrew the connector.
1
0000098889_001
► Screw the water filter (1) onto the water supply
and tighten by hand.
Connecting the water hose
The water hose must meet the following require‐
ments:
–The water hose has a diameter of 1/2".
–The water hose is between 10 m and 25 m
long.
► Connect the water hose to a tap.
► Turn on the water tap fully and flush the water
hose with water.
Sand and dirt will be flushed out of the water
hose. The water hose will be vented.
► Turn off tap.
1
2
0000098890_001
► Push the coupling (1) onto the connector (2).
The coupling (1) engages with an audible
click.
English 7 Connecting to a water source
12 0458-003-8321-B

► Turn tap fully on.
► If the spray lance is attached to the spray gun:
Remove the spray lance.
► Squeeze the spray gun trigger until an even
water jet is delivered from the spray gun.
► Release the spray gun trigger.
► Lock the spray gun trigger.
► Attach the spray lance.
► Attach the nozzle.
Removing the water hose
1
2
0000098891_001
► Turn off tap.
► To unlock the coupling: Pull the ring (1) or
twist and hold it.
► Pull the coupling off the connector (2).
7.2 Connecting the high-pressure
washer to another water supply
The high-pressure washer can draw in water
from water butts, storage tanks and flowing or
still rivers and lakes.
a
0000098892_001
So that the water can be drawn in, the height dif‐
ference between the high-pressure washer and
the water source must not exceed the max. suc‐
tion lift (a), 18.
The appropriate STIHL suction set must be used.
The suction set includes a water hose with a
special coupling.
Depending on the market, the appropriate STIHL
suction set may be included with the high-pres‐
sure washer.
Connecting the water filter
If the high-pressure washer is operated with
water containing sand from water butts, cisterns
or from flowing or still rivers and lakes, a water
filter must be connected to the high-pressure
washer.
Depending on the market, the water filter may be
included with the high-pressure washer.
13
2
0000098893_001
► Unscrew the connector (1).
► Insert water intake screen (2) into the coupling
of the water hose (3).
Connecting the water hose
3
4
21
1
0000098894_001
► Fill the water hose (1) with water so that no air
is present in the water hose any more.
► Screw the coupling (2) onto the connector of
the pressure washer (3) and tighten by hand.
► Attach the suction cup (4) to the water source
so that the suction cup (4) does not touch the
ground.
► If the spray gun is fitted to the high-pressure
hose: Remove the spray gun.
► Hold the high-pressure hose downwards.
► Switch on the high-pressure washer until an
even water jet flows out of the high-pressure
hose.
7 Connecting to a water source English
0458-003-8321-B 13

NOTICE
■ If the high-pressure washer does not suck in
water, the pump may run dry and the high-
pressure washer may be damaged.
►If no water escapes from the high-pressure
hose after two minutes: Switch off the high-
pressure washer and check the water sup‐
ply.
►Switch off the high-pressure washer.
► Connect the spray gun to the high-pressure
hose.
► Press and hold down the spray gun trigger.
► Switch on high-pressure washer.
8 Connecting the pressure
washer to the power supply
8.1 Connecting the pressure
washer to an electric power
supply
2
0000-GXX-5304-A0
1
3
3
► Set the toggle switch to the 0 position.
► Remove the connecting cord (2) from the hold‐
ers (3).
► Plug the plug of the connecting cord into a cor‐
rectly installed socket.
9 Switching the pressure
washer on and off
9.1 Switch on high-pressure
washer
When the pressure washer is switched on, volt‐
age fluctuations may occur under unfavorable
mains conditions. The voltage fluctuations may
negatively affect other connected electrical appli‐
ances.
0000-GXX-5305-A0
► Set the rocker switch to position I.
9.2 Switching off the pressure
washer.
0000-GXX-5306-A0
► Set the toggle switch to the 0 position.
10 Operating the pressure
washer
10.1 Holding and controlling the
spray gun
0000098900_001
► Hold the spray gun by the handle with one
hand, wrapping your thumb around the han‐
dle.
► Hold the spray lance firmly with your other
hand, wrapping your thumb around the spray
lance.
► Point the nozzle at the ground.
English 8 Connecting the pressure washer to the power supply
14 0458-003-8321-B

10.2 Unrolling the high-pressure
hose
1
0000-GXX-9835-A1
WARNING
■ When the lever of the spray gun is released, a
recoil occurs in the high-pressure hose. A
recoil expands the high-pressure hose. If the
high-pressure hose is not completely unwound
from the hose reel, there is no room for the
high-pressure hose to expand and the high-
pressure hose may be damaged. Water can
escape uncontrollably into the environment at
high pressure. This may result in serious injury
to people and damage to property.
► Completely unroll high-pressure hose.
► Completely unroll high-pressure hose (1).
10.3 Squeezing and locking the
spray gun trigger
Pressing the spray gun trigger
2
1
0000097568_002
►Move the retaining latch (1) to the position.
► Press and hold the trigger (2).
The high-pressure pump starts up automati‐
cally and water flows out of the nozzle.
Locking the spray gun trigger
2
1
0000097575_002
► Release the trigger (2).
The high-pressure pump switches off automat‐
ically and water stops flowing out of the noz‐
zle. The high-pressure washer is still switched
on.
►Move the retaining latch (1) to the position.
10.4 Cleaning
According to the application, the following noz‐
zles can be used:
–Fan-jet nozzle: The fan-jet nozzle is designed
for cleaning large areas.
–Rotary nozzle: The rotary nozzle is designed
for removing stubborn dirt.
The user can work close up to the surface in
order to remove stubborn dirt.
The user can work at a distance when cleaning
any of the following surfaces:
–Painted surfaces
–Wooden surfaces
–Rubber surfaces
0000-GXX-4628-A0
The fan-jet nozzle is adjustable.
Turning the fan-jet nozzle in the + direction
increases the working pressure.
Turning the fan-jet nozzle in the – direction
reduces the working pressure.
► Before starting work, direct the water jet at an
inconspicuous area of the surface and check
that the surface does not suffer damage.
► Select the distance between the nozzle and
the surface to be cleaned so that the surface
to be cleaned is not damaged.
10 Operating the pressure washer English
0458-003-8321-B 15

► Adjust the fan-jet nozzle so that the surface to
be cleaned is not damaged.
0000-GXX-5094-A0
► Move the spray attachment evenly along the
surface to be cleaned.
► Move forward slowly in a controlled manner.
10.5 Working with Detergent
Detergents can increase the cleaning effect of
the water. The use of the STIHL spraying set is
required for working with cleaning agents. The
STIHL spraying set may be included in the scope
of delivery, depending on the market.
2
1
0000097580_001
► Dose and use cleaning agent as described in
the user manual for the cleaning agent.
► Fill the bottle (1) with maximum 500 ml of the
detergent.
► Screw the spray nozzle (2) onto the bottle (1)
and tighten firmly by hand.
3
4
0000097581_002
► If a nozzle is attached to the spray lance (3):
Remove the nozzle.
► Attach the spray set (4) to the spray lance (3).
► Soak extremely dirty surfaces with water
before cleaning them.
► Press the spray gun lever and spray the deter‐
gent onto the surface to be cleaned.
► Apply the detergent starting at the bottom and
working up and do not allow to dry.
► Remove the spraying set.
► Attach the nozzle.
► Clean the surface.
11 After Finishing Work
11.1 When Work is Finished
► Switch off the high-pressure washer and pull
the mains plug out of the socket.
► If the high-pressure washer is connected to
the water supply: Turn off water supply.
► Press the spray gun trigger.
The water pressure is reduced.
► Lock the spray gun trigger.
► Disconnect the high-pressure washer from the
water source.
► Remove the water hose.
► Remove and clean the nozzle and spray
lance.
► Remove the spray gun and let the rest of the
water run out of the spray gun.
► Clean the high-pressure washer.
6
3
2
4
1
5
0000097560_001
► Wind up the high-pressure hose (1) evenly
distributed over the reel.
► Coil the connecting cable (2) on the holder (3).
► Secure the connecting cable (2) using the clip
(4).
► Insert spraying set (5).
► Insert nozzle (6).
7
7
7
7
7
0000098886_001
► Store the spray attachment in the holders (7)
on the high-pressure washer.
English 11 After Finishing Work
16 0458-003-8321-B

11.2 Protecting the pressure washer
with antifreeze
If the pressure washer cannot be protected from
frost during transport or storage, the pressure
washer should be protected by a glycol-based
antifreeze. The antifreeze prevents water inside
the pressure washer from freezing and causing
damage to the pressure washer.
► Remove spray lance
► Connect the shortest possible water hose to
the pressure washer.
The shorter the water hose, the less antifreeze
is needed.
► Mix the antifreeze as described in the anti‐
freeze Instruction Manual.
► Pour antifreeze into a clean container.
► Insert water hose into container of antifreeze.
► Squeeze and hold spray gun trigger.
► Switch on pressure washer.
► Hold down spray gun trigger until an even jet
of antifreeze is delivered from the spray gun
and point the spray gun into the container.
► Press and release spray gun trigger several
times.
► Switch off pressure washer and unplug mains
plug from the socket.
► Detach spray gun and water hose and allow
antifreeze to run into the container.
► Store and dispose of antifreeze in accordance
with the applicable regulations and in an envi‐
ronmentally responsible manner.
12 Transporting
12.1 Transporting the high-pressure
washer
► Switch off the high-pressure washer and pull
the mains plug out of the socket.
► Empty or secure the detergent container so
that it cannot topple over, fall down and cannot
move.
Carrying or pulling the high-pressure washer
1
2
1
0000-GXX-1813-A0
► Pull the high-pressure washer using handle
(1).
► Carry the pressure washer by the handle (1)
and the carrying handle (2).
Transporting the high-pressure washer in a vehi‐
cle
► Secure the high-pressure washer so that it
cannot turn over or move.
► If the high-pressure washer cannot be trans‐
ported in a frost-proof environment: Protect
the high-pressure washer using antifreeze.
13 Storing
13.1 Storing the pressure washer
► Switch off pressure washer and unplug mains
plug from the socket.
► The pressure washer should be stored in such
a way that the following conditions are fulfilled:
–The pressure washer is out of the reach of
children.
–The pressure washer is clean and dry.
–The pressure washer is in an enclosed
room.
–The pressure washer is in a temperature
range above 0 °C.
–If the pressure washer cannot be protected
from frost in storage: Protect the pressure
washer with antifreeze.
14 Cleaning
14.1 Cleaning the high-pressure
washer and accessories
► Switch off the high-pressure washer and pull
the mains plug out of the socket.
► Clean the high-pressure washer, high-pres‐
sure hose, spray gun and accessories with a
damp cloth.
► Clean the connectors and couplings on the
high-pressure washer, high-pressure hose and
spray gun with a damp cloth.
► Clean vents with a paintbrush.
14.2 Cleaning nozzle and spray
lance
0000098883_A1
12 Transporting English
0458-003-8321-B 17

► Rinse the nozzle and spray lance under run‐
ning water and dry with a cloth.
0000098884_001
► If the nozzle is clogged: Clean the nozzle with
the cleaning pin.
14.3 Cleaning the water intake
screen
1
1
2
0000099084_001
► Unscrew the connector (1) of the water con‐
nection.
► Remove water intake screen (2) from the con‐
nector.
► Rinse out the water intake screen (2) under
running water.
► Insert water intake screen (2) into the connec‐
tor.
► Attach the connector (1) and tighten it by
hand.
14.4 Cleaning the water filter
The water filter must be disassembled to clean it.
1
2
3
0000099083_001
► Remove the seal (1) from the filter housing (3).
► Take the filter (2) out of the filter housing (3).
► Rinse out the seal (1) and the filter (2) under
running water.
► Grease the gasket (1) with a fitting grease.
► Reassemble the water filter.
15 Maintenance
15.1 Maintenance intervals
Maintenance intervals depend on the ambient
conditions and the operating conditions. STIHL
recommends the following maintenance inter‐
vals:
Monthly
► Clean water intake screen.
16 Repairing
16.1 Repairing the pressure washer
The user cannot personally repair the pressure
washer and accessory.
► If the pressure washer or accessory is dam‐
aged: Do not use the pressure washer or
accessory. Consult a STIHL servicing dealer.
17 Troubleshooting
17.1 Correcting faults in the pressure washer
Fault Cause Remedy
The pressure washer
does not start
although the spray
gun trigger is
squeezed.
The mains plug of the connecting
cable or extension cord is not plugged
in.
► Plug in mains plug of connecting
cord or extension cord.
The circuit-breaker (fuse) or the resid‐
ual current circuit breaker has tripped.
There is an electrical overload or a
fault in the circuit.
► Look for cause of tripping and rem‐
edy it. Engage circuit-breaker (fuse)
or the residual current circuit
breaker.
► Switch off other loads connected to
the same circuit.
English 15 Maintenance
18 0458-003-8321-B

Fault Cause Remedy
The fuse rating of the socket is too
low.
► Plug the connecting cable into a
socket with the correct fuse rating,
18.
The extension cord has an incorrect
cross-section.
► Use an extension cord with an ade‐
quate cross-section, 18.2
The extension cord is too long. ► Use an extension cord with the cor‐
rect length, 18.2
The electric motor is too warm. ► Allow the pressure washer to cool
for 5 minutes.
► Clean the nozzle.
The pressure washer
does not start when
switched on. The
electric motor buz‐
zes.
The mains voltage is too low. ► Squeeze and hold the spray gun
trigger and switch on the pressure
washer.
► Switch off other loads connected to
the same circuit.
The extension cord has an incorrect
cross-section.
► Use an extension cord with an ade‐
quate cross-section, 18.2
The extension cord is too long. ► Use an extension cord with the cor‐
rect length, 18.2
The pressure washer
switches off while in
operation.
The plug of the connecting cord or
extension cord has been pulled out of
the socket.
► Plug in mains plug of connecting
cord or extension cord.
The circuit-breaker (fuse) or the resid‐
ual current circuit breaker has tripped.
There is an electrical overload or a
fault in the circuit.
► Look for cause of tripping and rem‐
edy it. Engage circuit-breaker (fuse)
or the residual current circuit
breaker.
► Switch off other loads connected to
the same circuit.
The fuse rating of the socket is too
low.
► Plug the connecting cable into a
socket with the correct fuse rating,
18.
The electric motor is too warm. ► Allow the pressure washer to cool
for 5 minutes.
► Clean the nozzle.
The high-pressure
pump repeatedly
switches on and off
without squeezing the
spray gun trigger.
There is a leak in the high-pressure
pump, high-pressure hose or spray
attachment.
► Ask a STIHL servicing dealer to
inspect the pressure washer.
The working pressure
fluctuates or drops.
There is not enough water. ► Open water tap fully.
► Make sure that a sufficient quantity
of water is available.
The nozzle is blocked. ► Clean the nozzle.
The water intake screen or water filter
is blocked.
► Clean water intake screen and water
filter.
The high-pressure pump, high-pres‐
sure hose or spray attachment is leak‐
ing or faulty.
► Ask a STIHL servicing dealer to
inspect the pressure washer.
The shape of the
water jet has
changed.
The nozzle is blocked. ► Clean the nozzle.
The nozzle is worn. ► Fit a new nozzle.
Detergent additive is
not being drawn in.
The container is empty. ► Fill container with detergent.
17 Troubleshooting English
0458-003-8321-B 19

Fault Cause Remedy
The nozzle of the spraying set is
blocked.
► Clean nozzle of spraying set.
Connections with
pressure washer,
high-pressure hose,
spray gun or spray
lance are stiff.
The gaskets of the connections have
not been greased.
►Lubricate the gaskets. 17.2
17.2 Lubricating the seals
1
1
1
0000098899_001
► Grease the seals (1) with grease for fittings.
18 Specifications
18.1 STIHL RE 90.0 PLUS high-
pressure washer
Version 100 V / 50-60 Hz
–Fuse (characteristic "C" or "K"): 15 A
–Power consumption: 1.4 kW
–Protection class: II
–Degree of of electrical protection: IPX5
–Working pressure (p): 6.7 MPa (67 bar)
–Max. permissible pressure (p max.): 10 MPa
(100 bar)
–Max. water supply pressure (p in max.): 1 MPa
(10 bar)
–Max. water throughput (Q max.): 7.5 l/min
(450 l/h)
–Minimum water throughput (Q min.): 5.4 l/min
(320 l/h)
–Max. suction lift: 0.5 m
–Max. water temperature in pressure mode
(t in max): 40 °C
–Max. water temperature in suction mode:
20 °C
–sample inspection
–Length: 340 mm
–Width: 320 mm
–Height: 880 mm
–Length of high-pressure hose: 6 m
–Weight (m) with accessory attached: 9 kg
Version 127 V / 60 Hz
–Fuse (characteristic "C" or "K"): 15 A
–Power consumption: 1.5 kW
–Protection class: II
–Degree of of electrical protection: IPX5
–Working pressure (p): 7.2 MPa (72 bar)
–Max. permissible pressure (p max.): 10 MPa
(100 bar)
–Max. water supply pressure (p in max.): 1 MPa
(10 bar)
–Max. water throughput (Q max.): 7.5 l/min
(450 l/h)
–Minimum water throughput (Q min.): 5.5 l/min
(330 l/h)
–Max. suction lift: 0.5 m
–Max. water temperature in pressure mode
(t in max): 40 °C
–Max. water temperature in suction mode:
20 °C
–sample inspection
–Length: 340 mm
–Width: 320 mm
–Height: 880 mm
–Length of high-pressure hose: 6 m
–Weight (m) with accessory attached: 9 kg
Versions from 220 V to 240 V / from 50 to 60 Hz
–Fuse ("C" or "K" characteristic): 10 A
–Power consumption: 2.1 kW
–Maximum permitted network impedance: 0.21
Ohm
–Protection class: II
–Degree of of electrical protection: IPX5
–Working pressure (p): 10 MPa (100 bar)
–Max. pressure (p max.): 13 MPa (130 bar)
–Max. water supply pressure (p in max.): 1 MPa
(10 bar)
–Max. water throughput (Q max.): 7.4 l/min
(440 l/h)
–Minimum water throughput (Q min.): 5.8 l/min
(350 l/h)
–Max. suction lift: 0.5 m
–Max. water temperature in pressure mode
(t in max): 40 °C
–Max. water temperature in suction mode:
20 °C
–sample inspection
–Length: 340 mm
–Width: 320 mm
–Height: 880 mm
–Length of high-pressure hose: 6 m
English 18 Specifications
20 0458-003-8321-B