STIHL SG 20 Owner's Manual
STIHL SG 20
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Instruction Manual
Manual de instrucciones
Warning!
Read and follow all safety precautions in
Instruction Manual – improper use can cause
serious or fatal injury.
Advertencia!
Lea y siga todas las precauciones de
seguridad dadas en el manual de
instrucciones – el uso incorrecto puede
causar lesiones graves o mortales.
Instruction Manual
1 - 13
Manual de
instrucciones
15 - 28
Contents
English
Guide to Using this Manual 1
Safety Precautions and Working
Techniques 2
Assembling the Unit 7
Harness 8
Filling the Tank 9
Spraying 9
Storing the Machine 10
Original Instruction ManualPrinted on chlorine-free paper
Maintenance and Care 11
Main Parts 12
Specifications 13
Special Accessories 13
Printing inks contain vegetable oils, paper can be recycled.
Guide to Using this Manual
Pictograms
All the pictograms attached to the
machine are shown and explained in this
manual.
Symbols in text
The operating and safety instructions
are supported by illustrations.
The individual steps or procedures
described in the manual may be marked
in different ways:
N A bullet marks a step or procedure
without direct reference to an
illustration.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
N Loosen the screw (1)
N Lever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
{
© ANDREAS STIHL AG & Co. KG, 2009
0458-408-8621-A. M15.C9.FST.
0000000825_001_GB
SG 20
1
English
Danger!
indicates an imminent risk of severe or
fatal injury.
Warning!
indicates a hazardous situation which, if
not avoided, could result in severe or
fatal injury.
Caution!
indicates a risk of property damage,
including damage to the machine or its
individual components.
Engineering improvements
STIHL’s philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time to time. Therefore,
some changes, modifications and
improvements may not be covered in
this manual. If the operating
characteristics or the appearance of
your machine differ from those
described in this manual, please contact
your STIHL dealer for assistance.
Safety Precautions and
Working Techniques
Because the backpack
sprayer is a tool for
spraying chemicals, special safety precautions
must be observed to
reduce the risk of personal injury.
It is important that you
read, fully understand
and observe the following
general safety precautions and warnings. Read
the instruction manual
and the safety precautions periodically. In
addition, read and follow
the chemical manufacturer’s instructions for the
chemical products being
applied. Since such products may vary greatly in
handling/application
requirements and risks,
the chemical product
label is normally your
best guide for safe and
effective use.
Warning!
Read the label each time before mixing
or using the chemical and before storing
or disposing of it. Do not trust your
memory. Careless or improper use may
cause serious or fatal injury.
Have your STIHL dealer show you how
to operate your sprayer. Observe all
applicable federal, state and local safety
regulations, standards and ordinances.
All operating and servicing personnel
should be trained and familiarized with
the proper handling procedures for the
chemical products being used, as well
as with first aid/emergency care, and
liquid chemical disposal regulations.
Warning!
Do not lend or rent your sprayer without
the instruction manual. Be sure that
anyone using it understands the information contained in this manual.
Warning!
The chemicals sprayed with your backpack sprayer may contain toxic and/or
caustic substances. Such chemicals
can be dangerous and cause serious or
fatal injury to persons and animals
and/or severe damage to plants and the
environment.
Avoid direct contact with chemicals.
Follow the chemical manufacturer’s
instructions with respect to any contact
with its product.
Use your backpack sprayer for spraying
chemicals and other liquids to control
pests and weeds in fruit, flower and
vegetable gardens, on trees and bushes
and on other plants, such as coffee,
tobacco and cotton. It is also useful in
the maintenance of young trees,
controlling the bark beetle and other
plant diseases.
Warning!
Do not use it for other purposes, since
misuse may result in personal injury or
property damage, including damage to
the sprayer itself.
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SG 20
Warning!
Minors should never be allowed to use
this backpack sprayer. Bystanders,
especially children, and animals should
not be allowed in the area where it is in
use. Make sure that unauthorized persons do not use it.
Most of these safety precautions and
warnings apply to the use of all STIHL
backpack sprayers. Different models
may have different parts and controls.
See the appropriate section of your
instruction manual for a description of
the controls and the function of the parts
of your model.
Safe use of a backpack sprayer involves
1. the operator
2. the backpack sprayer
3. the use of the backpack sprayer
4. the handling of the chemicals to be
sprayed.
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate
this backpack sprayer when you are
fatigued.
Warning!
Be alert – if you get tired, take a break.
Tiredness may result in loss of concentration and control. Working with any
backpack sprayer can be strenuous. If
you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating this
backpack sprayer.
Proper Clothing
Warning!
To reduce the risk of injury when working with chemical agents, the operator
should wear proper protective apparel
when filling, using and cleaning the
backpack sprayer. Always follow all of
the chemical manufacturer’s instructions with respect to proper eye, skin,
nose and mouth protection. They may
differ from and exceed the following
precautions.
Warning!
To reduce the risk of
injury to your eyes you
may need to wear protective goggles when
operating your backpack
sprayer. Check the product label for the chemical you are
spraying..
Always wear rub-
ber/chemical-resistent
gloves when handling the
backpack sprayer.
English
For some chemicals it is
advisable to wear impermeable coveralls or an
impermeable work apron.
Check the product label.
If you are spraying overhead or if the spray may
reach head height, wear
a wide brim hat or other
suitable head covering.
Do not wear shorts, sandals or go barefoot.
Wear rubber/chemicalresistent boots.
Warning!
When working with toxic chemicals, the
operator and any bystanders may need
to wear a properly fitted respirator
approved by NIOSH/MSHA for the
chemical being used. Consult the product label. Breathing toxic chemicals can
cause serious or fatal injury.
Warning!
Backpack sprayers may usually also be
used in greenhouses that are well-ventilated if the operator can protect himself
or herself from any harmful effects
through the use of proper eye, skin,
nose and mouth protection. Such work
may require special precautions.
SG 20
3
English
THE BACKPACK SPRAYER
For illustrations and definitions of the
backpack sprayer parts see the chapter
on "Main Parts and Controls."
Warning!
Never modify this backpack sprayer in
any way. Only attachments supplied by
STIHL or expressly approved by STIHL
for use with the specific STIHL model
are authorized.
If this tool is subjected to unusually high
loads for which it was not designed (e.g.
heavy impact or a fall), always check
that it is in good condition before
continuing work. Check in particular that
the container system is tight (no leaks)
and that the controls are working
properly. Do not continue operating this
backpack sprayer if it is damaged. In
case of doubt, have it checked by your
STIHL servicing dealer.
Warning!
Make sure the hose is securely attached
and in good condition before pressurizing the container. Never attempt to
pressurize the unit by any other method
than with the pump module provided.
HANDLING OF CHEMICALS
Warning!
Chemicals can be harmful to individuals, animals and the environment if
improperly used. In addition, some
chemicals that are caustic, corrosive or
poisonous should not be used in your
sprayer.
Carefully read the labels on chemical
containers prior to use. Chemicals are
classified into categories of toxicity.
Pesticides regulated by the EPA, for
instance, use signal words to indicate
the product’s potential to make you sick.
"Caution" appears on pesticides found
to be least harmful to humans.
"Warning" indicates a product that is
more poisonous than those in the
"Caution" group. Pesticides with the
signal word "Danger" on the label are
very poisonous or irritating. They should
be used with extreme care. Finally,
pesticides labeled "Danger – Poison"
are for restricted use only and generally
must be used under the supervision of a
certified applicator. Similarly, the EPA
rates herbicides with the signal words
"Caution", "Warning" and "Danger."
Each category will have unique handling
characteristics. Familiarize yourself with
the characteristics for the category you
are using.
Warning!
Mix only compatible pesticides and/or
herbicides. Wrong mixtures can produce toxic fumes.
When handling chemicals and when
spraying, make sure you are operating
in accordance with local, state, and
federal environmental protection rules
and guidelines. Do not spray in windy
conditions. To help protect the
environment, use only the
recommended dosage – do not overuse.
Warning!
Do not eat, drink, or smoke while handling chemicals or while you are
spraying. Never blow through nozzles,
valves, pipes or any other component
by mouth. Always handle chemicals in a
well-ventilated area while wearing
appropriate protective clothing and
safety equipment. Do not store or transport chemicals with food or medicines,
and never reuse a chemical container
for any other purpose.
Do not transfer spray materials to other
containers, especially food and/or drink
containers.
Warning!
In case of accidental contact or ingestion of chemicals or in case of
contamination of clothing, stop work and
immediately consult the chemical manufacturer’s instructions. If in doubt as to
what to do, consult a poison control
center or doctor without delay. Have the
product’s label available to read to or
show the persons you consult.
Clean all chemical spills immediately.
Dispose of any residue in accordance
with state or federal laws and
regulations.
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SG 20
Warning!
Keep chemicals out of reach of children,
other unauthorized people or animals.
When not in use, store chemicals in a
safe place. Follow the manufacturer’s
recommendations for proper storage.
THE USE OF THE BACKPACK
SPRAYER
Transporting the Backpack Sprayer
Empty container when transporting it in
a vehicle; properly secure it to prevent
damage to the unit.
Filling the Container
Before using the sprayer with chemicals,
fill it with fresh water to assure that you
have it properly assembled; pressurize it
and practice spraying. Also, check for
any leaks at this time. When thoroughly
familiar with the sprayer operation,
follow normal operating procedures.
Fill your backpack sprayer in wellventilated areas, outdoors.
Warning!
Do not use:
– flammables in the sprayer, which
can explode causing serious or fatal
injury;
– caustic or corrosive materials in the
sprayer, which could result in
damage to the unit; backpack
sprayer
– liquids with a temperature above
120 °F (50 °C) to avoid scalding and
damage to the unit. Do not leave
pressurized sprayer in the hot sun
or near any heat source.
To fill the backpack sprayer, place it on
a level surface. To reduce the risk of
contaminating the surrounding
environment, be careful not to overfill the
container with chemical solution.
If you fill the container with a hose
attached to a central water supply, be
sure the end of the hose is out of the
solution to reduce the risk of backflow,
i.e. the chemicals being sucked into the
water supply in the case of a sudden
vacuum.
Calculate the correct amount of
chemical solution so that it is used up at
one time, with no extra solution left in the
container.
Warning!
To reduce the risk of personal injury
and/or property damage from solutions
that are too strong, make sure that
chemicals that require dilution are
diluted properly. When filled to the maximum mark, the tank contains
approximately 4.76 gal. (18 l). See the
Specifications for the exact amount.
English
Warning!
Check for leakage while refilling and
during operation. A leak from the container or a loose fitting could soak your
clothing and come into contact with your
skin.
Before Spraying
Warning!
Always inspect your sprayer before and
after each use. To reduce the risk of
leakage and skin contact with chemicals, check that the cap and all
connections are tight, and be sure the
hose is securely attached and in good
condition before pressurizing the
container.
Warning!
Never use a backpack sprayer that is
damaged or not properly maintained.
Warning!
Your backpack sprayer is a one-person
tool. Do not allow other persons in the
general work area.
SG 20
5
English
During Operation
Holding and Controlling the
Backpack Sprayer
The backpack sprayer is operated with
the right hand on the trigger valve and
the left hand on the hand lever.
The backpack sprayer is carried as a
backpack.
Warning!
Adjust carrying harness to suit your size
before starting work.
In order to keep the container upright
and reduce the risk of spillage, do not
bend at the waist. Bend only at the
knees and support yourself as required
to ensure proper balance.
Remember that a sprayer filled with
liquid has a significant amount of weight.
Use caution when bending, leaning or
walking.
Warning!
To reduce the risk of injury from loss of
control, never work on a ladder, in a tree
or on any other insecure support.
Working Conditions
Operate your backpack sprayer only in a
well-ventilated area. Operate it under
good visibility and daylight conditions
only. Work carefully.
Warning!
Inhalation of certain chemicals can
cause susceptible persons to have an
allergic or asthmatic reaction. Substantial or repeated inhalation of certain
chemicals may cause respiratory disease, cancer, birth defects, or other
reproductive harm. Control the chemical
spray at the source where possible. Use
good work practices, such as operating
the unit so that the wind or operating
process does not blow the spray back
on the operator. Follow the recommendations of EPA/OSHA/NIOSH and
occupational and trade associations
with respect to proper usage. When the
inhalation of the chemical being sprayed
cannot be avoided, the operator and
any bystanders may need to wear a respirator approved by NIOSH/MSHA for
the type of chemical encountered. Consult the label of the chemical product
being used.
Warning!
If you are unfamiliar with the risks associated with the particular chemical at
issue, review the product label and/or
material safety data sheet for that substance and/or consult the material
manufacturer/supplier. You may also
consult your employer, governmental
agencies such as the EPA, OSHA and
NIOSH and other sources on hazardous
materials. The state of California and
some other authorities, for instance,
have published lists of substances
known to cause cancer, reproductive
toxicity, etc.
Operating instructions
Warning!
Pay attention to the direction of the
wind, i.e., do not work against the wind.
When spraying, stand so that the wind
does not blow towards you or
bystanders.
Keep children and pets away from areas
that have just been sprayed. After the
use of some chemicals, especially
agricultural pesticides, a notice must be
posted on the treated area that a
"Restricted Entry Interval" (REI) is in
effect. See the product’s label and any
applicable governmental regulations.
Never spray in the direction of humans,
animals or property which might be
injured or damaged by spray formula.
6
SG 20
English
Danger!
Your backpack sprayer is
not insulated against
electric shock. To reduce
the risk of electrocution,
never operate this back-
pack sprayer in the
vicinity of any wires or cables (power,
etc.) which may be carrying electric current. Do not spray on or near electrical
installations.
After Finishing Work
Always wash thoroughly with soap and
water after spraying or handling
chemicals. Shower immediately, and
wash all protective clothing separately
from other items. Follow any additional
recommendations of the chemical
manufacturer.
Always clean dust and dirt off the
backpack sprayer.
Warning!
Empty, rinse and clean the container
and sprayer assembly after each use.
This helps to prevent the solution from
crystallizing, which could later cause
clogging and chemical damage to the
unit. In addition; residual chemicals may
have undesirable effects during subsequent spraying with a different type of
chemical (e.g., residual herbicide may
damage or kill plants being sprayed with
a pesticide).
Disposal of contaminated rinse should
be in accordance with applicable
ordinances. Observe the precautionary
instructions of the chemical
manufacturer.
Do not store sprayer under pressure or
with spray solution in the container.
Maintenance, Repair and Storing
Warning!
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may result in personal
injury or property damage.
Strictly follow the maintenance and
repair instructions in the appropriate
section of your instruction manual.
Please refer to the maintenance chart in
this manual.
Warning!
Always release pressure in the pump
and the pressure chamber prior to
cleaning or servicing the sprayer. To
release the pressure, keep the trigger
valve depressed without operating the
hand lever until there is no more air or
liquid coming out of the nozzle.
Do not attempt any maintenance or
repair work not described in your
instruction manual. Have such work
performed by your STIHL servicing
dealer only.
Assembling the Unit
N Connect the wand (1) to the spray
gun (2).
N Secure the nozzle holder (3) to the
wand (1).
SG 20
7
English
N Mount the hand lever (4) with the
screws (5).
After completing assembly, do a test run
with clean water to check the sprayer for
leaks – do not use the sprayer if it is
leaking.
Harness
N Adjust the harness straps so that
the backplate fits snugly and
securely against your back.
Threading the harness straps
Tightening the harness straps
373BA003 KN
N Pull the ends of the straps
downward.
Loosening the harness straps
373BA004 KN
N Lift the tabs of the sliding adjusters.
8
SG 20
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