Manual Makita GN420C (page 10 of 72) (English, German, Polish)

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• 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.20

Remove the fuel cell, the battery cartridge and nails.

Loosen the bolt on the magazine. Remove the

magazine and remove the jammed nails.

Fig.21

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.22

Fig.23

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.24

Fig.25

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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Makita GN420C Manual

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