17. STAY ALERT. Watch what you are doing, use common sense. Don't operatetool when you are tired.18. CHECK DAMAGED PARTS. Before further use of the tool, a guard or otherpart that is damaged should be carefully checked to determine that it willoperate properly and perform its intended function. Check for alignment ofmoving parts, binding of moving parts, breakage of parts, mounting, and anyother conditions that may affect its operation. A guard or other part thatis damaged should be properly repaired or replaced by an authorized service center unless otherwise indicated elsewhere in this instruction manual.Have defective switches replaced by authorized service center. Don't usetool if switch does not turn it on and off.19. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with groundedsurfaces. For example; pipes, radiators, ranges, refrigerator enclosures.20. REPLACEMENT PARTS. When servicing, use only identical replacement parts.VOLTAGE WARNING: Before connecting the tool to a power source (receptacle,outlet, etc.) be sure the voltage supplied is the, same as that specified on thenameplate of the tool. A power source with voltage greater than that specifiedfor the tool can result in SERIOUS INJURY to the user - as well as damage tothe tool. If in doubt, DO NOT PLUG IN THE TOOL. Using a power source withvoltage less than the nameplate rating is harmful to the .motor.3