8. Care and maintenance
Unplug the supply cord.
8.1 Care of insert tools
Remove any dirt adhering to the surface of the insert
tools and protect them from corrosion by rubbing them
with an oily cloth from time to time.
8.2 Care of the tool
CAUTION
Keep the power tool, especially its grip surfaces,
clean and free from oil and grease. Do not use clean-
ing agents which contain silicone.
The outer casing of the tool is manufactured from
impact-resistant plastic. The grip section is manufac-
tured from synthetic rubber.
The ventilation slots must be unobstructed and kept
clean at all times. Use a dry brush to clean the ventila-
tion slots carefully. Do not permit foreign objects to
enter the interior of the tool. Use a slightly damp cloth
to clean the outside of the tool at regular intervals. Do
not use a spray, steam-cleaning system or running
water for cleaning. This may negatively affect the elec-
trical safety of the tool. Always keep the grip sections
of the tool free from oil and grease. Do not use clean-
ing agents or polishes, etc., containing silicone.
9. Troubleshooting
Fault
The tool doesn't start.
No hammering action.
The tool doesn't achieve
full performance.
The drill bit can't be released.
Printed: 07.07.2013 | Doc-Nr: PUB / 5071102 / 000 / 00
8.3 Maintenance
Check all external parts of the tool for damage at reg-
ular intervals and check that all controls operate fault-
lessly. Do not operate the tool when parts are damaged
or when the controls do not operate faultlessly. If nec-
essary, have the tool repaired at a Hilti service centre.
Electrical parts of the tool may be repaired only by
trained electrical specialists.
8.4 Checking the tool after care and maintenance
After all care and maintenance work, the tool must be
checked to ensure that all safety equipment is fitted
and that it operates faultlessly.
Possible cause
No power from the mains supply. Plug in another electric tool or
Supply cord or plug is defective.
The control switch is defective.
The tool is too cold.
Function selection switch set to
rotary drilling only.
The cross-section of the
extension cord is inadequate.
The control switch is not pressed Press the control switch as far as
as far as it will go.
The function selection switch is
set to reduced hamering action.
The reversing switch is set to
counter-clockwise rotation.
The chuck is not pulled back fully. Pull the chuck back as far as it will go
Remedy
appliance and check whether it works.
Have it checked by an electrical
specialist and replaced if necessary.
Have it checked by an elecrical
specialist and replaced if necessary.
Allow the tool to warm up to the
operating temperature
(see section "Operation").
Set the function selection switch
to hammer drilling.
Use an extension cord with
adequate conductor cross-section
(see section "Operation").
it will go.
Set the function selection switch
to hammer drilling.
Set the reversing switch to
clockwise rotation.
and remove the insert tool.
en
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