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The user is responsible for avoiding injury to third

parties or damage to their property.
Do not lend or rent your sprayer without the

instruction manual. Be sure that anyone using it

understands the information contained in this

manual.
Do not operate your sprayer if any of its compo‐

nents are damaged. Make sure that all compo‐

nents are properly sealed – no leaks.
Pressurize the tank only with the pump that is

installed in the sprayer.
Operate the sprayer only if it is complete and

properly assembled.
To operate this sprayer you must be rested, in

good physical condition and mental health.
Do not operate the sprayer if you are under the

influence of any substance (drugs, alcohol)

which might impair vision, dexterity or judgment.

2.2

Intended use

The sprayer is suitable for spraying chemicals

and other liquids to control pests and weeds.

Typical areas of application are in fruit and vege‐

table growing, horticulture, plantations, grassland

and the forestry industry.
Only use plant protection products that are spe‐

cifically approved for use in sprayers.
Do not use your sprayer for any other purpose

because of the increased risk of accidents and

damage to the sprayer. Never attempt to modify

your sprayer in any way since this may result in

accidents or damage to the sprayer.

2.3

Clothing and Equipment

Wear proper protective clothing and equipment

when using, filling and cleaning the sprayer. Fol‐

low the chemical manufacturer's instructions with

respect to protective equipment.
Clothing must be snug-fitting but allow complete

freedom of movement.
Immediately change work clothes contaminated

with plant control chemicals.

For some chemicals it is necessary to

wear impermeable coveralls.

If you are spraying overhead, wear impermeable

head covering.

Wear impermeable safety boots with

a non-slip sole which are resistant to

plant control chemicals.

Do not wear sandals or go barefoot.

Wear impermeable gloves resistant to

plant control chemicals.

WARNING

To reduce the risk of eye injuries,

wear snug-fitting safety glasses in

accordance with European Standard

EN 166. Make sure the safety

glasses are a good fit.

Wear a suitable respirator.
Inhaling plant control chemicals may endanger

your health. Always wear a suitable respirator to

protect yourself against health risks and allergic

reactions. Observe warnings in the directions for

use of the plant protection product and all appli‐

cable local safety regulations, standards and

ordinances.

2.4

Transport

Transporting in a vehicle:

Properly secure the sprayer to prevent turn‐

over and damage.

The tank must be de-pressurized, empty and

clean.

2.5

Cleaning

Clean plastic surfaces with a cloth. Do not use

aggressive detergents. They may damage the

plastic.
Do not use a pressure washer to clean the unit.

The solid jet of water may damage parts of the

unit.

2.6

Accessories

Only use parts and accessories that are explicitly

approved for this tool by STIHL or are technically

identical. If you have any questions in this

respect, consult a servicing dealer. Use only high

quality parts and accessories in order to avoid

the risk of accidents and damage to the tool.
STIHL recommends the use of genuine STIHL

replacement parts. They are specifically

designed to match your model and meet your

performance requirements.

2 Safety Precautions and Working Techniques

English

0458-583-0121-B

3

Summary of Contents for SG 21

Page 1: ...SG 21 Instruction Manual 2 13 ...

Page 2: ...ments STIHL s philosophy is to continually improve all of its products For this reason we may modify the design engineering and appearance of our products periodically Therefore some changes modifications and improvements may not be covered in this man ual 2 Safety Precautions and Working Techniques This instruction manual covers a STIHL sprayer which is also referred to as the unit in the descrip...

Page 3: ... change work clothes contaminated with plant control chemicals For some chemicals it is necessary to wear impermeable coveralls If you are spraying overhead wear impermeable head covering Wear impermeable safety boots with a non slip sole which are resistant to plant control chemicals Do not wear sandals or go barefoot Wear impermeable gloves resistant to plant control chemicals WARNING To reduce ...

Page 4: ...produce toxic fumes or explo sive solutions Stand the sprayer on a level surface do not fill the tank above the maximum mark When filling from central water supply do not immerse the end of the hose in the solution sudden low pressure in the system may cause the solution to be sucked back into the water supply To reduce the risk of injury do not fill the sprayer while carrying it Close the tank ti...

Page 5: ... exhaustion Work calmly and carefully in daylight conditions and only when visibility is good Stay alert so as not to endanger others Never work on a ladder or any other insecure support When working in open ground and gardens take special care to avoid harming small animals To reduce the risk of electrocution never work in the vicinity of live wires or power cables Always clean the sprayer before...

Page 6: ... the spray gun 2 3 1 Shoulder Strap Pull the buckle off the shoulder strap 6159BA004 KN Ease the housing outwards and thread the strap through the openings from below 6159BA005 KN Thread the ends of the strap through the buckle 4 Controls Make yourself familiar with how the components function before using your sprayer for the first time 4 1 Pump Locking the pump handle 6159BA006 KN Push the pump ...

Page 7: ...er releases the excess pressure Depressurize the tank 6159BA010 KN Pull the piston manometer up all the way pressure is released wait until tank is com pletely depressurized Pressure must be released before filling the tank after spraying to drain and clean the tank before carrying out maintenance work 4 3 Operating the Spray Gun 0000 GXX 0013 A0 KN Pull the trigger solution flows from nozzle Rele...

Page 8: ...screw the pump from the tank Stand the tank securely on a level surface 0000 GXX 0014 A0 KN Pour thoroughly mixed spray solution through the opening arrow do not exceed maximum capacity check max mark on scale Screw the pump into the tank 7 Spraying 7 1 Visual Inspection Do not operate your unit if any of its components are damaged It is particularly important to check the tank and hose connection...

Page 9: ...ater Fill the tank with clean water pump and spray until the tank is empty and completely depres surized Wipe down the whole unit with a damp cloth 9 Storing the Machine Keep tank and pump separate for drying and storage Dry the unit and store it in a place protected from direct sunlight and frost 10 Inspection and Mainte nance by User 10 1 Pump Removing Unscrew the pump from the tank Hold pump fi...

Page 10: ...otate the pump handle 1 clockwise until gland 2 engages the cylinder barrel Push the pump handle 1 downwards and lock it in position Screw the pump into the tank 10 2 Cleaning the Filter and Nozzle 1 3 0000 GXX 0015 A1 2 Unscrew the hollow cone nozzle 1 with spin ner insert 2 from the wand 0000 GXX 0016 A0 KN Rinse out all parts under running water and then reassemble English 10 Inspection and Mai...

Page 11: ... X X X Piston cup seal Lubricate with grease X X X O ring Lubricate with grease X X Safety labels Replace X 12 Main Parts 5 5 9 6 7 1 2 3 0000 GXX 0017 A1 19 8 4 20 18 10 15 16 11 13 14 17 12 1 Hollow cone nozzle 2 Spinner insert 3 Filter 4 Elbow 5 Union nut 6 Spray wand 7 Spray gun 8 Lever 9 Hose 10 Pump handle 11 Piston rod 12 Latch on pump cylinder 13 Gland 14 O ring 15 Pump barrel 16 Piston cu...

Page 12: ... tank pressure relief valve operates too soon Piston manometer faulty Replace the sprayer 15 Maintenance and Repairs Users of this machine may only carry out the maintenance and service work described in this user manual All other repairs must be carried out by a servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an author ized STIHL servicing deal...

Page 13: ...n number 4255 conforms to the relevant specifications of Direc tive 2006 42 EC Technical documents deposited at ANDREAS STIHL AG Co KG Produktzulassung Done at Waiblingen 03 02 2020 ANDREAS STIHL AG Co KG pp Dr Jürgen Hoffmann Director Product Certification Regulatory Affairs 17 EC Declaration of Conformity English 0458 583 0121 B 13 ...

Page 14: ...English 17 EC Declaration of Conformity 14 0458 583 0121 B ...

Page 15: ...17 EC Declaration of Conformity English 0458 583 0121 B 15 ...

Page 16: ...www stihl com 04585830121B 04585830121B 0458 583 0121 B 0458 583 0121 B ...

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