Makita GN420C Bedienungsanleitung Seite 12

— Make sure that the tool does not operate only by
placing the contact element against the workpiece
without pulling the trigger.
— Make sure that the tool does not operate when
pulling the trigger first and then placing the contact
element against the workpiece.
Driving nails
► Fig.18
1. To drive a nail, place the contact element against
the workpiece.
The fan motor is activated, fuel gas is injected
into combustion chamber and mixed with air by
the fan.
► Fig.19: 1. Trigger
2. Hold the contact element pressing firmly and pull
the trigger.
Fuel gas is combusted and the nail is driven.
3. Further driving can be initiated only after both the
contact element and the trigger are released.
Nail-driving of concrete
WARNING:
• Use hardened nails only for concrete.
Using other purposed nails may cause serious
injuries. Do not nail directly on the concrete.
Failure to do so may cause concrete fragments
to fly off or nails to strike back, causing serious
injuries.
• When driving nails, hold the tool so that it stands
upright to the driving surface.
Slanted nail-driving may cause concrete frag-
ments to fly off or nails to strike back, causing
serious injuries.
• Do not use the tool on the surface that objects
hang from, such as area where hangers for
sewer pipe, dust pipe etc. are set up
CAUTION:
• Use this tool only for soft concrete built up not
so long before. Using on the hard concrete may
cause nail bending or nail-driving to insufficient
depth.
• When the penetration amount into concrete is
required more than 20 mm, driving nails to the
sufficient length may not be obtained. Nails may
be driven too shallow causing unstable work-
piece, resulting in personal injury and damage
to property.
• When driving nail directly onto hard surfaces
such as steel and concrete, press the contact
element firmly against the workpiece to prevent
slipping.
Choose and use appropriate nails so that the penetra-
tion amount into concrete ranges 15 mm - 20 mm.
► Fig.20: 1. Thin steel plate 2. Penetration amount
into concrete
Anti dry fire mechanism
This mechanism prevents the tool from firing without nail.
Dry fire prevention automatically functions when the
rest of nails get to the last 2-3 pieces.
Jammed nailer
WARNING:
• Always be sure to remove the fuel cell and the
battery cartridge before clearing a jam.
CAUTION:
• Do not use deformed nails or nail strip. Failure
to do so causes poor nail feeding.
Follow the removing nail procedure and remove the
jammed nails.
► Fig.21: 1. Magazine
Remove the fuel cell, the battery cartridge and nails.
Loosen the bolt on the magazine. Remove the maga-
zine and remove the jammed nails.
► Fig.22
If the nails cannot be removed after performing above
method, do as follows.
Insert a small rod or the like into the ejection port and tap it with
a hammer to drive out the jammed nails from the ejection port.
► Fig.23: 1. Under driver guide 2. Bolt
► Fig.24
If the nails still remain in the ejection port, do as follows.
Loosen the bolts on the ejecting port by using a hex wrench.
Remove the under driver guide. And remove the jammed nails.
Return the under driver guide and tighten the bolts after
the jammed nails are removed.
Return the magazine and tighten the bolt.
MAINTENANCE
CAUTION:
• Always remove the fuel cell, the battery car-
tridge and nails before attempting to perform
inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
Maintenance after daily work
Always check the tool for its overall condition and loose
screws before operation. Tighten as required.
At the end of daily work, conduct an end-of-workday routine.
These simple steps are based on maintaining the safety
and performance of the tool.
Before leaving the work site:
• Remove the battery cartridge and store in a
tool-carrying case. Always use the tool-carrying
case for transporting and storing the tool.
• Dispose of all empty cells where they will not be
found by children, crushed, punctured or burned.
12 ENGLISH