Functional Description - Makita AN621 Instruction Manual

• Never connect tool to compressed air line where
the maximum allowable pressure of tool cannot be
exceeded by 10%. Make sure that the pressure sup-
plied by the compressed air system does not
exceed the maximum allowable pressure of the fas-
tener driving tool. Set the air pressure initially to
the lower value of the recommended allowable
pressure.
• Do not attempt to keep the trigger or contact ele-
ment depressed with tape or wire. Death or serious
injury may occur.
• Always check contact element as instructed in this
manual. Nails may be driven accidentally if the
safety mechanism is not working correctly.
SAVE THESE INSTRUCTIONS.
INSTALLATION
Selecting compressor (Fig. 1)
The air compressor must comply with the requirements
of EN60335-2-34.
Select a compressor that has ample pressure and air
output to assure cost-efficient operation. The graph
shows the relation between nailing frequency, applicable
pressure and compressor air output.
Thus, for example, if nailing takes place at a rate of
approximately 50 times per minute at a compression of
0.59 MPa (5.9 bar), a compressor with an air output over
80 liters/minute is required.
Pressure regulators must be used to limit air pressure to
the rated pressure of the tool where air supply pressure
exceeds the tool's rated pressure. Failure to do so may
result in serious injury to tool operator or persons in the
vicinity.
Selecting air hose (Fig. 2)
Use an air hose as large and as short as possible to
assure continuous, efficient nailing operation. With an air
pressure of 0.49 MPa (4.9 bar), an air hose with an inter-
nal diameter of over 6.5 mm and a length of less than
20 m is recommended when the interval between each
nailing is 0.5 seconds.
CAUTION:
• Low air output of the compressor, or a long or smaller
diameter air hose in relation to the nailing frequency
may cause a decrease in the driving capability of the
tool.
Lubrication
To insure maximum performance, install an air set (oiler,
regulator, air filter) as close as possible to the tool. Adjust
the oiler so that one drop of oil will be provided for every
30 nails. (Fig. 3)
When an air set is not used, oil the tool with pneumatic
tool oil by placing 2 (two) or 3 (three) drops into the air fit-
ting. This should be done before and after use. For
proper lubrication, the tool must be fired a couple of
times after pneumatic tool oil is introduced. (Fig. 4)

FUNCTIONAL DESCRIPTION

CAUTION:
• Always lock the trigger and disconnect the hose before
adjusting or checking function on the tool.
Adjusting depth of nailing (Fig. 5)
To adjust the depth of nailing, turn the adjuster so that
the arrow above the adjuster will point to the number indi-
cated on the adjuster. The depth of nailing is the deepest
when the arrow points to the number 1. It will become
shallower as the arrow points to higher number. The
depth can be changed in approx. 1.0 mm increments per
graduation. If nails cannot be driven deep enough even
when the arrow points to the number 1, increase the air
pressure. If nails are driven too deep even when the
arrow points to the number 8, decrease the air pressure.
Generally speaking, the tool service life will be longer
when the tool is used with lower air pressure and the
adjuster set to a lower number.
ASSEMBLY
CAUTION:
• Always lock the trigger and disconnect the hose before
carrying out any work on the tool.
Selecting wire/plastic collated coil (Fig. 6)
According to the type of collated coil, set the change
lever.
Loading nailer
CAUTION:
• Make sure that nails are collated firmly and are not
bent.
Select nails suitable for your work. Depress the latch
lever and open the magazine cap. (Fig. 7)
Lift and turn the coil support plate to set it to the gradua-
tions of the magazine. If the tool is operated with the coil
support plate set to the wrong step, poor nail feed or mal-
function of the tool may result. (Fig. 8)
Place the nail coil over the coil support plate. Uncoil
enough nails to reach the feed claw. Place the first nail in
the driver channel and the second nail in the feed claw.
The nail heads must be in the slot in the feeder body.
Place other uncoiled nails on feeder body and attach
them to the magnet. Be sure that nails are in the feeder
claw and are not bent. Then close the magazine cap.
(Fig. 9)
Connecting air hose (Fig. 10)
Lock the trigger. Slip the air socket of the air hose onto
the air fitting on the nailer. Be sure that the air socket
locks firmly into position when installed onto the air fit-
ting. A hose coupling must be installed on or near the tool
in such a way that the pressure reservoir will discharge at
the time the air supply coupling is disconnected.
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