Masonry Drilling; Cleaning; Power Cord Maintenance - GMC HD2G850MK Manual

Masonry drilling

• For maximum performance use tungsten carbide-tipped
masonry impact bits when drilling holes in brick, tile,
concrete, etc.
• Move drilling mode selector to hammer mode.
• Apply light pressure and medium speed for best results
in brick.
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• Apply additional pressure and high speed for hard
materials such as concrete.
• When drilling in tile, practice on a scrap piece to
determine the best speed and pressure.

Cleaning

1. Keep your machine and its cord clean. The outside of
the machine can be cleaned using a damp soft cloth with
a mild detergent if required.
2. Some maintenance products and solvents may damage
the plastic parts; these include products containing
benzene, trichloroethylene, chloride and ammonia.
3. Excessive sparking generally indicates the presence
of dirt in the motor or abnormal wear on the carbon
brushes.
4. Take special care to keep the ventilation inlets/outlets
free from obstruction; cleaning with a soft brush followed
by a compressed air jet will usually be sufficient to ensure
acceptable internal cleanliness.
5. Wear eye protection when carrying out cleaning.
CAUTION. Do not use cleaning agents to clean the plastic
parts of the drill.

Power cord maintenance

If the supply cord needs replacing, the task must be carried
out by the manufacturer, the manufacturer's agent, or a
power tool repair centre in order to avoid a safety hazard.
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