Stihl SR 420 Instruction Manual page 4

English
Wear "personal" sound protection, e.g. ear
defenders.
Breathing 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 user manual
of the plant protection product and all applicable
local safety regulations, standards and ordinan‐
ces.
Wear impermeable gloves resistant to
plant control chemicals.
2.5 Handling Plant Control Chemi‐
cals
Read the user manual supplied with the plant
protection chemical prior to use. Follow the
instructions with respect to mixing, using, per‐
sonal protective equipment, storage and dis‐
posal.
Observe the legal requirements for handling
plant protection products.
Plant protection chemicals may contain substan‐
ces that are harmful to humans, animals, plants
and the environment – risk of poisoning and risk
of serious or fatal injuries!
Plant protection chemicals may be used only by
persons trained in their handling and the appro‐
priate first-aid measures.
Keep the user manual or label of the plant con‐
trol chemical available at all times in order to
inform the doctor about the chemical concerned
in an emergency. In an emergency, follow the
chemical manufacturer's instructions provided or
on the label.
2.5.1 Mixing the Spray Solution
Mix the plant protection product strictly in accord‐
ance with the manufacturer's instructions – incor‐
rect mixtures may produce toxic fumes or explo‐
sive solutions.
– Never spray liquid plant control chemicals
undiluted
– Prepare solution and fill the container outdoors
only or in well-ventilated locations.
– Only prepare sufficient solution for the job on
hand so that nothing is left over
– Mix different chemicals only in accordance
with the manufacturer's instructions – incorrect
mixtures may produce toxic fumes or explo‐
sive solutions
4
2 Safety Precautions and Working Techniques
– Do not mix different plant protection products
unless such a mixture is approved by the man‐
ufacturer
2.5.2 Filling the Solution Container
– Stand the power tool securely on a level sur‐
face – do not fill the container above the maxi‐
mum mark
– To reduce the risk of injury, do not fill the
power tool while wearing it on your back.
– Close the valve lever before filling.
– 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
– Before filling the container with spray solution,
carry out test run with fresh water and check
all parts of the sprayer for leaks
– After filling, fit the filler cap and tighten it down
firmly
2.5.3 UseUse
– Work only in the open or in very well ventilated
locations, e.g. open greenhouses
– Do not eat, drink or smoke while working with
plant protection chemicals
– Never blow through nozzles or other compo‐
nents by mouth
– Avoid contact with plant control chemicals –
immediately change clothing contaminated
with plant control chemical
– Do not spray in windy conditions
Unfavorable weather conditions may result in an
incorrect concentration of the plant protection
product. Overdosing may damage plants and the
environment. Under-dosing may result in unsuc‐
cessful plant treatment.
In order to reduce the risk of damage to the envi‐
ronment and plants, do not operate the sprayer:
– in windy conditions
– at temperatures above 25°C in the shade
– in direct sunlight
In order to reduce the risk of accidents and dam‐
age to the power tool, never operate the power
tool with:
– flammable liquids
– viscous or sticky liquids
– caustic or corrosive chemicals
– liquids hotter than 50 °C
2.5.4 Bearing
– During work breaks, do not leave the power
tool in the hot sun or near any heat source
– Do not store spray solution in the container for
longer than one day
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