Stihl SR 420 Instruction Manual - Page 7

English / USA THE POWER TOOL For illustrations and definitions of the power tool parts see the chapter on "Main Parts and Controls." !Warning! Never modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous. 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 fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. In case of doubt, have it checked by your STIHL servicing dealer. !Warning! An electrostatic charge may be created in the extension tube and nozzle area when applying dry materials (e.g. dusts) with the dusting and spreading attachment (special accessory). This is especially true in low humidity conditions. Check the label and/or material safety data sheet for the chemical you are applying. To reduce the risk of severe or fatal injury, do not use your mistblower to apply substances that may create a combustible or explosive dust cloud. For instance, never use your mistblower to apply sulfur or sulfur compounds, since they may be highly explosive and have relatively low melting and ignition points. !Warning! To reduce the risk of sparking when applying any dry substance, make sure that the discharge system (conductive wire in the mistblower connected to a metal chain) is completely and properly mounted to the machine, and that the discharge chain is making contact with the ground. It is essential to follow the fitting instructions supplied with the dusting and spreading attachment. 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 mistblowers. 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. Each category will have unique handling characteristics. Familiarize yourself with the characteristics for the category you are using. !Warning! Mix only compatible pesticides. Wrong mixtures can produce toxic fumes. 6 SR 340, SR 420