Maintenance - Ferm Hdm1007 Gebrauchsanweisung

GB
• To remove the bit, slide and hold the locking
sleeve to the rear.
Setting depth gauge
• Loosen the handgrip by turning it
anticlockwise.
• Insert the depth gauge ruler through the hole
in the auxiliary handgrip.
• Slide the ruler to the desired depth.
• Retighten the screw firmly.
Function selection switch
Fig. C
The correct position of the selection switch for
each machine function is given in the diagram
(Fig.C) on page 2.
1 = Demolition hammer/chisel
2 = Rotary hammer drill
3 = Drilling
Switching On/Off
• To start the drill, squeeze the trigger.
• To stop the drill, release the trigger.
Installing dust catcher
Fig. D
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.

4. MAINTENANCE

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.
6
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
1. When switched on, the motor does not
turn.
• 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
2. Motor generates excessive noise, and runs
too slowly or not at all.
• 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
3. Overheating in the transmission case.
• Overloading of machine, or blunt drill bit
• Reduce the loading, or hone the drill bit.
• Reduced voltage.
• Adjust the supply voltage.
4. Heavy sparking from the motor.
• Inspect the carbon brushes for wear.
Replacing carbon brushes
• Replace both carbon brushes at the same
time.
• Regularly check the carbon brushes for wear
and defects.
• Always replace worn-out carbon brushes.
• Always keep the carbon brushes clean, and
make sure that neither brush is obstructed.
Ferm