Makita GN900 Instruction Manual page 6

Wear hearing protection to protect your ears against
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exhaust noise and head protection. Also wear light
but not loose clothing. Sleeves should be buttoned
or rolled up. No necktie should be worn.
Rushing the job or forcing the tool is dangerous.
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Handle the tool carefully. Do not operate when
under the influence of alcohol, drugs or the like.
General Tool Handling Guidelines:
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− Always assume that the tool contains
fasteners.
− Do not point the tool toward yourself or
anyone whether it contains fasteners or not.
− Do not activate the tool unless the tool is
placed firmly against the workpiece.
− Respect the tool as a working implement.
− No horseplay.
− Do not hold or carry the tool with a finger on
the trigger.
− Do not load the tool with fasteners when any
one of the operating controls is activated.
− Do not operate the tool with any power
source other than that specified in the tool
operating/safety instructions.
An improperly functioning tool must not be used.
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Sparks sometimes fly when the tool is used. Do not
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use the tool near volatile, flammable materials such
as gasoline, thinner, paint, gas, adhesives, etc.;
they will ignite and explode, causing serious injury.
The area should be sufficiently illuminated to
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assure safe operations. The area should be clear
and litter-free. Be especially careful to maintain
good footing and balance.
Only those involved in the work should be in the
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vicinity. Children especially must be kept away at
all times.
There may be local regulations concerning noise
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which must be complied with by keeping noise
levels within prescribed limits. In certain cases,
shutters should be used to contain noise.
Do not play with the contact element: it prevents
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accidental discharge, so it must be kept on and not
removed. Securing the trigger in the ON position is
also very dangerous. Never attempt to fasten the
trigger. Do not operate a tool if any portion of the
tool operating controls is inoperable, disconnected,
altered, or not working properly.
Always check the tool for its overall condition and
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loose screws before operation. Tighten as required.
Make sure all safety systems are in working order
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before operation. The tool must not operate if only
the trigger is pulled or if only the contact arm is
pressed against the wood. It must work only when
both actions are performed. Test for possible faulty
operation with nails unloaded and the pusher in
fully pulled position.
Check walls, ceilings, floors, roofing and the like
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carefully to avoid possible electrical shock, gas
leakage, explosions, etc. caused by striking live
wires, conduits or gas pipes.
Use only nails specified in this manual. The use of
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any other nails may cause malfunction of the tool.
Never use fastener driving tools marked with the
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symbol "Do not use on scaffoldings, ladders" for
specific application for example:
− when changing one driving location to another
involves the use of scaffoldings, stairs, ladders,
or ladder alike constructions, e.g. roof laths;
− closing boxes or crates;
− fitting transportation safety systems e.g. on
vehicles and wagons.
Do not permit those uninstructed to use the tool.
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Make sure no one is nearby before nailing. Never
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attempt to nail from both the inside and outside at
the same time. Nails may rip through and/or fly off,
presenting a grave danger.
Watch your footing and maintain your balance with
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the tool. Make sure there is no one below when
working in high locations to prevent danger if there
is sudden jerking or catching.
On rooftops and other high locations, nail as you
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move forward. It is easy to lose your footing if you
nail while inching backward. When nailing against
perpendicular surface, nail from the top to the
bottom. You can perform nailing operations with
less fatigue by doing so.
A nail will be bent or the tool can become jammed
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if you mistakenly nail on top of another nail or strike
a knot in the wood. The nail may be thrown and hit
someone, or the tool itself can react dangerously.
Place the nails with care.
Do not point the ejection port at anyone in the
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vicinity. Keep hands and feet away from the
ejection port area.
Never carry the tool with your finger on the trigger
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or hand it to someone in this condition. Accidental
firing can be extremely dangerous.
Handle the tool carefully, as there is high pressure
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inside the tool that can be dangerous if a crack is
caused by rough handling (dropping or striking).
Do not attempt to carve or engrave on the tool.
Stop nailing operations immediately if you notice
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something wrong or out of the ordinary with the tool.
Always remove the fuel cell, the battery cartridge
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and all of the nails:
− When unattended.
− Before performing any maintenance or repair.
− Before cleaning a jam.
− Before moving the tool to a new location.
Perform cleaning and maintenance right after
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finishing the job. Keep the tool in tip-top condition.
Lubricate moving parts to prevent rusting and
minimize friction-related wear. Wipe off all dust
from the parts.
Do not modify tool without authorization from
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Makita.
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