3. Begin with the chisel positioned at an angle of 70° to 80° to the concrete surface, with the tip of the chisel
pointing toward the edge of the workpiece. Break material away by subsequently increasing the angle to
approx. 90° as the chisel penetrates.
▶ When working close to reinforcing bars, always guide the tip of the chisel toward the edge of the
workpiece, not toward a reinforcing bar.
4. Rotate the chisel regularly to help ensure even wear and to promote the self-sharpening process.
5.2.2
Setting the chiseling power
▶ Press the power level selector switch.
▶ Chiseling power can be reduced to approx. 70% by pressing the power level selector switch.
Chiseling power can be adjusted only when the power tool is switched on and ready for use. To
reselect full chiseling power, press the chiseling power level selector switch again. Switching off
and then on again also causes the power tool to return to full chiseling power.
6
Care and maintenance
WARNING
Electric shock hazard! Attempting care and maintenance with the supply cord connected to a power outlet
can lead to severe injury and burns.
▶ Always unplug the supply cord before carrying out care and maintenance tasks.
Care
•
Carefully remove stubborn dirt from the tool.
•
Clean the air vents carefully with a dry brush.
•
Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
they can attack the plastic parts.
Maintenance
WARNING
Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including
burns.
▶ Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical
specialists.
•
Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
•
Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired
immediately by Hilti Service.
•
After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare
parts, consumables and accessories approved by Hilti for use with the product can be found at your
local Hilti Store or online at: www.hilti.group.
6.1
Cleaning the dust shield
▶ Clean the dust shield on the chuck with a dry, clean cloth at regular intervals.
▶ Clean the sealing lip by wiping it carefully and then grease it again lightly with Hilti grease.
▶ It is essential that the dust shield is replaced if the sealing lip is damaged.
7
Transport and storage
•
Do not transport electric tools with accessory tools fitted.
•
Always unplug the supply cord before storing an electric tool or appliance.
•
Store tools and appliances in a dry place where they cannot be accessed by children or unauthorized
persons.
•
Check electric tools or appliances for damage after long periods of transport or storage.
8
English
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