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5
each machine function is given in the diagram
(Fig.C) on page 2.
1 = Demolition hammer/chisel
2 = Rotary hammer drill
3 = Drilling

• To start the drill, squeeze the trigger.
• To stop the drill, release the trigger.
Installing dust catcher
Fig. C
The dust catcher prevents large amounts of
drilling dust entering the machine when drilling
into ceilings:
• Remove the drill bit.
• Slide the dust catcher over the shaft of the drill
bit.
• Place the drill bit with catcher in the drill
chuck.
• Always replace a damaged dust catcher
immediately.

Take care that the machine is not
connected to power whenever
maintenance work on the mechanical
parts is taking place.
The machines are designed to function
problem-free for a long period with a minimum
of maintenance. Through regular cleaning and
correct treatment, you help assure a long working
life for your machine.
Defects
The machine should be regularly inspected for
the following possible defects, and repaired if
necessary.
• Damage to power cord
• Broken on/off trigger assembly.
• Short circuiting.
• Damaged moving parts.
Trouble shooting
 

• Failure in power supply.
• Check the power supply.
• Poor contact in the on/off trigger.
• Repair or replace the trigger assembly.
• Mains voltage too low.
• Extension lead too long, or too light.
• Damaged motor.
• Have your machine repaired by an expert.
• Carbon brushes worn.
• Replace the carbon brushes
 

• Motor is overloaded due to excessive
pressure or drilling depth.
• Reduce the pressure or drilling depth,
reduce power.
• Damaged motor.
• Have your machine repaired by an expert.
• Supply voltage too low.
• Adjust the supply voltage.
• Carbon brushes worn.
• Replace the carbon brushes
 
• Overloading of machine, or blunt drill bit
• Reduce the loading, or hone the drill bit.
Replacing carbon brushes
• Regularly check the carbon brushes for wear
and defects.
• Replace both carbon brushes at the same
time.
• Always replace worn-out carbon brushes.
• Always keep the carbon brushes clean, and
make sure that neither brush is obstructed.
• Open the machine to inspect/replace the
carbon brushes.
• Remove and replace the carbon brushes if
necessary.
Cleaning
Clean the machine casings regularly with a soft
cloth, preferably after each use. Make sure that
the ventilation openings are free of dust and
dirt. Remove very persistent dirt using a soft
cloth moistened with soapsuds. Do not use any
solvents such as gasoline, alcohol, ammonia,
etc. Chemicals such as these will damage the
synthetic components.
Lubrication
Fig. A
• Regularly grease the hammer drill shaft.
• Regularly check the grease-level inside the
machine:
• Remove the grease cap (12) on top of the
5


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