SG 31
English
2
Pictograms
All the pictograms attached to the 
machine are shown and explained in this 
manual.
Symbols in text
WARNING
Warning where there is a risk of an 
accident or personal injury or serious 
damage to property.
NOTICE
Caution where there is a risk of 
damaging the machine or its individual 
components.
Engineering improvements
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 manual.
This instruction manual covers a STIHL 
sprayer which is also referred to as the 
unit in the descriptions.
General
Observe all applicable local safety 
regulations, standards and ordinances.
If you have not used this model before: 
Have your dealer or other experienced 
user show you how it is operated or 
attend a special course in its operation.
Minors should never be allowed to use 
this product.
Keep bystanders, especially children, 
and animals away from the work area.
When the sprayer is not in use, put it in 
a place where it does not endanger 
others. Secure it against unauthorized 
use.
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 
components are damaged. Make sure 
that all components 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.
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 vegetable 
growing, horticulture, plantations, 
grassland and the forestry industry.
Only use plant protection products that 
are specifically 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.
Guide to Using this Manual Safety Precautions and 
Working Techniques
Special safety precau-
tions must be observed 
when working with this 
sprayer.
It is important that you 
read the instruction man-
ual before first use and 
keep it in a safe place for 
future reference. Non-
observance of the 
instruction manual may 
result in serious or even 
fatal injury.