[. . . ] Always connect extension cords to a fused line or one protected by a circuit breaker. â· EXTENSION CORDS -- to prevent disconnection of extension cord during operation, use extension cord retainer as described in this manual. â· DAMAGE TO UNIT -- If you strike or become entangled with a foreign object, stop trimmer immediately, unplug, check for damage and have any damage repaired before further operation is attempted. â· DAMAGE TO CORD -- Keep power cord away from rotating line. [. . . ] An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. The following table shows the correct size to use depending on cord length and nameplate ampere rating. Move the lock on button of the upper body to the left and push down until being able to move the lock on button to the right. Set the guard in the lower body, turning until choke the grooves and fit tightly with the two screws. The wide section of the guard has to be inside, in the side of your feet. Edging Procedure Caution: Inspect area to be trimmed for any wire, cord, or string-like matter which could become entangled in the rotating line or spool. Be particularly careful to avoid any wire which might be bent outwardly into the path of the tool, such as barbs at the base of a chain link fence. Push the lock button on the upper body to the left and pull out the handle. Rotate the trimmer handle and insert in this position on the lower body. Move the lock on button to the left and push down until being able to move the lock on button to the right. Rotate counterclockwise the knob located on the lower body to release and pull up the upper body to adjust the telescoping shaft until suit your height comfortably. Line Feeding Procedure In order to feed a length of cutting line, strike the bump cap on the lawn while the trimmer is running. This will automatically feed a new length of line and trim it to the correct length. The unit should be angled slightly forward to prevent the guard from contacting the ground. If unit fails to feed, unplug extension cord at trimmer and clean out the bump cap. trimming Technique and Performance Notes Tilt trimmer at a slight angle from the ground. ) Slowly swing unit into and out of area being cut, holding the unit off the ground at desired cutting height. IMPORTANT: for the best cutting action against walls, fences and in high grass, move trimmer slowly so grass is cut WITH THE TIP of the high speed nylon line. The life of your nylon line is dependent upon following the above trimming techniques, as well as what is being cut, and where the cutting is being done. Periodically unplug extension cord at trimmer and remove the accumulation of grass or cutting debris from the inside of the bump cap shroud. [. . . ] Avoid all other types of detergents, cleaners or solvents which might contain chemicals that could seriously damage the plastic. Self lubricating bearings are used in the tool and periodic relubrication is not required. However, it is recommended that after two or three seasons of use, you take or send the trimmer to a Black & Decker service center or authorized service station (see TOOLS, ELECTRIC in yellow pages) for a thorough cleaning, inspection and relubrication. If the tool is being used professionally, the above should be accomplished after each trimming season. [. . . ]