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8. Care and maintenance
Unplug the supply cord from the mains socket.
8.1 Care of insert tools
Clean off dirt and dust deposits and protect your insert
tools from corrosion by wiping them from time to time
with an oil-soaked rag.
8.1.1 Regrinding insert tools
Pointed, flat and wide-flat chisels can be reground when
slightly worn at the tip or cutting edge.
-NOTE-
Avoid overheating the surface of the chisel during grind-
ing (no discoloration).
8.2 Care of the electric tool
The outer casing of the tool is made from impact-resis-
tant plastic. Sections of the grip are made from an elas-
tomer material.
Never operate the tool when the ventilation slots are
blocked. Clean the ventilation slots carefully using a dry
brush. Do not permit foreign objects to enter the interior
of the tool. Clean the outside of the tool at regular intervals
using a slightly damp cloth. Do not use a spray, steam
pressure cleaning equipment or running water for cleaning.
This may negatively affect the electrical safety of the tool.
Always keep the grip surfaces of the tool free from oil
and grease. Do not use cleaning agents which contain
silicone.
8.3 Service indicator
The tool is equipped with a service indicator.
8.3.1 The service indicator lights
The carbon brushes have reached the end of their life.
The tool can be operated for a further approx. ten hours
after the service indicator lights, after which the auto-
matic cut-out will be activated. Please return the tool to
a Hilti service center in good time so that it is ready for
use when required.
8.3.2 The service indicator blinks
An electrical fault has occurred.
The tool has been rendered inoperable and should be
returned to a Hilti repair center for servicing.
8.4 Maintenance
Check all external parts of the tool for damage at regular
intervals and check that all controls operate faultlessly.
Do not operate the tool if parts are damaged or when the
controls do not function faultlessly. If necessary, your
electric tool should be repaired at a Hilti repair center.
Repairs to the electrical section of the tool may be car-
ried out only by trained electrical specialists.
8.5 Checks after care and maintenance
After carrying out care and maintenance on the tool, check
that all protective equipment has been refitted and that
all items function faultlessly.
Fault Possible cause Remedy
The tool doesn't start Fault in mains supply Plug in another electric appliance and
check whether it works
Supply cord or plug defective The cord should be checked and, if neces-
sary, replaced by an electrical specialist
On/off switch defective The cord should be checked and, if neces-
sary, replaced by an electrical specialist
No hammering action The tool is too cold Allow the tool to warm up to the minimum
operating temperature (see 7.4 “Chiseling”)
The tool does not achieve Extension cord with inadequate cross Use an extension cord with adequate cross
full power section used section (see 6.1 “Use of extension cords”)
9. Troubleshooting
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