Makita GN420C Manuel D'instructions page 11

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 fragments 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.
Choose and use appropriate nails so that the penetration
amount into concrete ranges 15 mm - 20 mm. (Fig. 21)
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 workpiece, resulting in personal injury
and damage to property.
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. 22)
Remove the fuel cell, the battery cartridge and nails.
Loosen the bolt on the magazine. Remove the magazine
and remove the jammed nails. (Fig. 23)
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. 24 & 25)
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 cartridge 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
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.
When you get home:
• Place the battery cartridge in its charger if it needs
charging as indicated by the red indication lamp.
• Wipe the tool with a clean, soft cloth.
• Check the filter and clean if it is dusty.
Cleaning the air filter (Fig. 26 & 27)
Press slightly up the filter cover and remove it. And then
simply lift out the filter.
Tap the filter lightly to remove any dust. Soap and water
restores the filter to an almost new condition
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.
Thoroughly cleaning
If dry fires occur frequently, which means the tool is
needed to be cleansed thoroughly.
See the accompanying cleaning guide for detail, and
perform the cleaning.
If you have any questions regarding to cleaning, please
ask your local Makita Service Center.
OPTIONAL ACCESSORIES
CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Nails
• Magazine
• Safety goggles
• Fuel cell
• Cleaning kit
• Makita genuine battery and charger
NOTE:
• Some items in the list may be included in the tool
package as standard accessories. They may differ
from country to country.
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