DeWalt DCST960 Guide D'utilisation page 12

To extend runtime, push the speed control switch (C) forward toward
the auxillary handle (D) into the "LO" position. This mode is best for
larger projects that require more time to complete.
To accelerate the trimmer, pull the speed control switch back toward
the battery housing (I) into the "HI" position. This mode is best to cut
through heavier growth and for applications that need higher RPM.
noTe: When in "HI" mode, runtime will be decreased as compared to
when trimmer is in "LO" mode.
Trimming (Fig. 7, 8)
With the trimmer on, angle it and swing side to side as shown in
Figure 7.
Maintain a minimum distance of 24 inches (610 mm) between the
guard and your feet as shown in Figure 8.
FIG. 7
WARNING:
Keep the rotating string roughly parallel
with the ground. DO NOT TIlT the trimmer so that the string is spinning
near a right angle to the ground. Flying debris can cause serious injury.
Bump Feed Trimmer Line Feed
Your trimmer uses 0.080 inches (2.032 mm) diameter nylon line,
however a 0.095 inches (2.413 mm) line may be used as long as it
is spiral-shaped with smooth, round edges.
FIG. 8
MINIMUM
Minimum
24 inches
24 INCHES
(609.6 mm)
(610 mm)
10
Cutting line will wear faster and require more feeding if the cutting is
done along sidewalks or other abrasive surfaces or heavier weeds are
being cut.
As you use the trimmer, the string will get shorter due to wear. Gently
bump the trimmer on the ground while running at normal speed and
the line will feed.
noTe: Extending nylon line beyond the 15 inch (381 mm) swath will
negatively affect performance, runtime, and the life of the trimmer due to
potential of damaging motor. Doing so may void the warranty.
Helpful cutting Tips
• Use the tip of the string to do the cutting; do not force string head
into uncut grass.
• Wire and picket fences cause extra string wear, even breakage.
Stone and brick walls, curbs, and wood may wear string rapidly.
• Do not allow spool cap to drag on ground or other surfaces.
• In long growth, cut from the top down and do not exceed
12 inches (304.8 mm) high.
• Keep trimmer tilted toward the area being cut; this is the best
cutting area.
• The trimmer cuts when passing the unit from the left to right. This
will avoid throwing debris at the operator.
• Avoid trees and shrubs. Tree bark, wood moldings, siding, and
fence posts can easily be damaged by the string.
Replacement Accessories
WARNING:
personal injury, turn appliance off and remove battery before
making any adjustments or removing/installing attachments
or accessories.
To reduce the risk of serious