Stihl MSA 140 C-BQ Instruction Manual - Page 15
Using the Chain Saw
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6 IMPORTANT SAFETY INSTRUCTIONS components may no longer function properly and safety devices may be inoperative. To reduce the risk of personal injury and property damage: - Take the chain saw and battery to your authorized STIHL servicing dealer to be checked before further operation. ■ Genuine STIHL replacement parts are specifically designed to match your chain saw and meet safety and performance requirements. Use of parts that are not authorized or approved by STIHL may cause serious or fatal injury or property damage. - STIHL recommends that only identical STIHL replacement parts be used. 6.5 Using the Chain Saw 6.5.1 Before Operation WARNING ■ Misuse or unauthorized use may result in personal injury and property damage. - Use the chain saw only as described in this instruction manual. ■ For proper assembly of the bar and chain: - Read and follow the instructions on mounting the guide bar and chain, @ 15.2.1. ■ The chain, guide bar and sprocket must match each other in gauge and pitch. Before mounting or replacing: - Read the information on guide bar and chain combinations, @ 27. - Read and follow the instructions on kickback and other reactive forces, @ 7. - Select the shortest bar that will meet your cutting needs. Longer bars add weight and may be more difficult to control. English ■ Proper tension of the chain is extremely important to maximize cutting performance and reduce the risk of personal injury from chain breakage, derailment or reactive forces: - Read and follow the chain tensioning instructions, @ 15.3. - Always make sure the chain sprocket cover is tightened securely after tensioning the chain in order to secure the bar. Never start the chain saw with the chain sprocket cover loose or missing. - Check chain tension once more after tightening the chain sprocket cover. - After adjusting the chain, let the motor run for a minute or two, then switch the motor off and engage the chain brake. Remove the battery and recheck chain tension. - Check chain tension periodically thereafter at regular intervals (only after engaging the chain brake and removing the battery). - Never cut with a loose chain. If the chain becomes loose while cutting, switch off the motor, engage the chain brake and remove the battery from the chain saw before tightening the chain. Never attempt to adjust the chain while the battery is inserted. ■ Using a chain saw that is damaged, improperly adjusted or maintained, or not completely and securely assembled can lead to a malfunction and increase the risk of serious personal injury or death. - Never operate a chain saw that is damaged, improperly maintained or not completely and securely assembled. - Always check your chain saw for proper condition and operation before starting work, particularly the trigger switch, trigger switch lockout, front hand guard, chain brake and cutting attachment. - Ensure that the trigger switch and trigger switch lockout move freely and always spring back to the locked position when released. The trigger switch must not engage until the trigger switch lockout is depressed. 0458-716-8621-E 13