Operation And Maintenance - GRAPHITE 58G858 Manual Del Usuario

• Working tool is properly seated if it cannot be removed without
pulling off the fixing sleeve.
• If the sleeve does not return to its default position, remove the
working tool and repeat the whole operation.
High efficiency of the hammer drill operation can be achieved by
using sharp and undamaged working tools.
DEINSTALLATION OF WORKING TOOL
Just after the operation is finished, the working tool may be hot.
Avoid direct contact and use appropriate protective gloves. Clean
the working tool after removal.
Disconnect the power tool from power supply.
• Pull the fixing sleeve (2) to the back and hold.
• Remove the working tool with your second hand by pulling it to
the front.
OVERLOAD CLUTCH
Hammer drill is equipped with factory set overload clutch. Spindle of
the hammer drill stops immediately after working tool jams, which
might overload the power tool.
USE OF ANTI-DUST COVER
Anti-dust cover is round, rubber casting of appropriate shape. It is
placed on the drill to catch dust when drilling in ceiling for example.
Put the cover on a drill, bring the drill close to the surface and move
the cover along the drill until it reaches surface of the processed
material. As the tool gets deeper into the material, the cover slides
on the drill and catches the dust produced. Empty the cover from
time to time.
Always use glasses or anti-splinter goggles, especially when
drilling a hole above your head.
OPERATION / SETTINGS
SWITCHING ON / SWITCHING OFF
The mains voltage must match the voltage on the rating plate of
the hammer drill.
Switching on – press the switch button (5) and hold in this position
(fig. B).
Switching off – release pressure on the switch (5).
VOLTAGE INDICATOR
When the tool is connected to power supply socket, the voltage
indicator (11) lights up (fig. J).
OPERATION MODE SWITCHES
Hammer drill features two switches of the working mode: impact
mode switch (6) (fig. D) and drilling mode switch (3) (fig. E).
Depending on its settings, a drilling only, impact drilling or chiselling
is possible. Impact drilling and chiselling require to slightly press the
hammer drill. Excessive pressure would cause excessive motor load.
Check technical condition of the working tools regularly. Sharpen or
replace working tools when needed.
Appropriate setting of switches for each of the functions is shown
on (fig. F).
Drilling without impact – pos. I
Impact drilling – pos. II
Chiselling – pos. III
Press the lock button (fig. G) prior to change of position of the
drilling mode switch (3). Do not try to change position of the
working mode switches when the hammer drill motor is operating.
Such action may cause serious damage of the hammer drill.
DRILLING HOLES
• When drilling a hole with large diameter, it is recommended to
drill smaller hole and then ream it to desired diameter. It prevents
overloading the hammer drill.
• When drilling deep holes drill gradually to smaller depths, then
slide the drill out of the hole to remove chips and dust.
• If a drill jam occurs during drilling, the overload clutch will work.
Turn off the hammer drill immediately to prevent its damage.
Remove jammed drill from the hole.
• Keep the hammer drill in the axis of the hole. Keeping the drill
perpendicular to the surface of the processed material is highly
desirable. If a drill is not kept perpendicular to the surface during
operation, it may get jammed or broken in the hole and injure the
user.
Long lasting drilling at low rotational speed of the spindle may
cause motor overheating. Make periodic breaks in operation. Do
not cover holes for motor ventilation in the hammer drill body.
IMPACT DRILLING
• Choose appropriate mode of operation, impact drilling in this case.
• Insert appropriate drill with SDS-plus shank into the chuck (1).
• To get the best results use high quality drills with sintered carbide
inserts.
• Press the drill against processed material.
• Switch on the hammer drill, the hammer mechanism should
operate smoothly and the tool should not bounce on the
processed material surface.
DRILLING WITHOUT IMPACT
Materials like steel, wood and plastic can be drilled without impact
with hammer drill with the use of three jaw chuck and intermediate
adapter. Mount together three jaw chuck and adapter by twisting
and then place it in the hammer drill chuck (proceed like with SDS
drills) (fig. H).
Do not use three jaw drill chuck when the hammer drill is set to
impact drilling. This chuck is designed only for drilling in wood
or steel. Do not use SDS drills together with additional three jaw
chuck. Use straight shank drills of high speed steel or carbon
steels (only for wood and wood-like materials).

OPERATION AND MAINTENANCE

Unplug the power cord from the mains socket before commencing
any activities related to installation, adjustment, repair or
maintenance.
• Always keep the hammer drill clean.
• Never use any caustic agent for cleaning plastic parts of the
hammer drill.
• After operation use compressed air to blow through the hammer
drill to remove dust deposit, especially to keep ventilation slots
pervious.
• It is necessary to regularly check technical condition of carbon
brushes of the motor (dirty or worn out brushes can cause
excessive sparking and loss of spindle speed of the hammer drill).
GEAR GREASING
It is recommended to check grease in the gear every 50 hours of
hammer drill operation and fill up grease according to needs. Use
high temperature grease available on market. Do not apply too
much grease.
• Loosen the lid (4) for greasing inlet by turning it left (fig. I).
• Fill up grease.
• Fix the lid (4) and turn it right (do not twist it too tightly to avoid
thread damage).
Do not apply too much grease. After the supplied grease ends, use
another available grease resistant to high temperature.
CARBON BRUSHES WEAR INDICATOR
When carbon brushes are worn, wear indicator (12) lights up
indicating that replacement is necessary. When the indicator has
been lit up, the tool may work for approximately 5 hours (fig. J).
REPLACEMENT OF CARBON BRUSHES
Replace immediately worn out (shorter than 5 mm), burnt or
cracked motor carbon brushes. Always replace both carbon
brushes at a time.
11