Makita AN451 User manual

a
Air pressure
4.5
- 8.5 kgf/cm2G
(65
- 120PSIG)
Pneumatic Roofing Coil Nailer
Dimensions
IL x H x W)
245 mm x 265 mm x 114 mm
Nail length Nail capacity Min. hose diameter Net weight
2.3 kg 15.1
Ibs)
6.0 mm 1114")
17/8"
- 1-3/4") 120 (9-5/8" x 10-318" x 4-1/2")
22 mm - 45 mm
MODEL AN451
INSTRUCTION MANUAL

IMPORTANT
SAFETY INSTRUCTIONS
WARNING: WHEN USING THIS TOOL, BASIC SAFETY PRECAUTIONS
SHOULD ALWAYS BE FOLLOWED
TO REDUCE THE RISK OF PERSONAL
INJURY, INCLUDINGTHE FOLLOWING:
READ ALL INSTRUCTIONS.
For personalsafety and properoperation and main-
tenance of the tool, read this instruction manual
carefully before using the
tool.
Wear light but notlooseclothing. Sleevesshouldbe
buttonedor rolled up. No necktie should be worn.
*Always wear safety glasses to protect your eyes
from dust or nail injury. The safety glasses should
conform
with the requirements of ANSI 287. 1 -
1979. Also wear hearingprotectiontoprotectyour
ears against exhaust noise.
WARNING:
It isan employer's responsibility toenforce the use
of safety eye protection equipment by the tool
operators and by other persons
in the immediate
working area.
*Rushing the job or forcing the tool is dangerous.
Handlethetoolcarefully.
Do notoperatewhen under
the influence of alcohol, drugs or the like.
B,

General Tool Handling Guidelines:
1. Always assumethat thetool containsfasteners.
2. Do not point the tool toward yourself or anyone
whether
it contains fasteners or not.
3. Never depress the operating control unless the
nosepiece of the tool is directed toward the
workpiece.
4. Respect the tool as a working implement.
5. No horseplay.
6. Do nottransport thetool with theoperating con-
7. Do not loadthetool with fasteners with the work-contactingelement or operating con-
trol depressed.
trol depressed.
Sparkssometimesflywhenthetoolisused. Do not
usethetoolnear volatile, flammablematerialssuch
as gasoline, thinner, paint, gas, adhesives, etc.; they
will ignite and explode, causing serious injury.
Thearea shouldbesufficientlyilluminated toassure
safe operations.
The area should be clear and litter- free. Be espe-
cially careful tomaintaingoodfootingandbalance.
*Only those involved
in the work should be in the
I

There may be local regulations concerning noise
which mustbecompliedwithby keepingnoiselevels
within prescribed limits.
In certain cases, shutters
should be used to contain noise.
Do nottamper with the tool or attempt touse it for
other than nailing.
Do not play with the contact
element;
it preventsaccidentaldischarge, 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.
Operatethetool withinthe specified air pressureof
4.5 - 8.5 kgflcm’G (65 - 120 PSIG) for safety
andlongertoollife.
Do notexceedthe recommend-
ed max. operating pressure of
8.5 kgf/cm’G (120
PSIG). Thetool shouldnotbeconnectedtoasource
whose pressure potentially exceeds
14.0 kgfIcm’G
(200 PSIG).
Never usethetool with other than compressedair.
If high-pressuregas (carbondioxide, oxygen, nitro-
gen, hydrogen, propane, acetylene, etc.) isused as
a power source for this tool, the tool will explode
and cause serious injury.
-Trigger
element
120 PSIG 120 PSIG
/ /
qrj
COMPRESSED

Always check the tool for its overall condition and
loosescrews beforeoperation. Tighten
as required.
Make sure all safety systems are in working order
before operation. The tool must not operate if only
the trigger is pulled or if only the contact element
ispressedagainstthewood.
It mustwork onlywhen
bothactionsare performed. Test for possiblefaulty
operation
with nails unloaded.
*Check walls, ceilings, floors, roofing and the like
carefully to avoid possible electrical shock, gas
leakage, explosions, etc. caused by striking' lives
wires, conduits or gas pipes.
I Live wire

Use only nailsspecified in this manual. The use of
any other nails may cause malfunction of the tool.
Watch your footing and maintainyour balance with
the tool. Make sure there is no one below when
working
in high locations, and secure the air hose
to prevent danger
if there is sudden jerking or
catching.
I
Do not permit those uninstructed to use the tool.
-
Make sure no one is nearby before nailing. Never
attempt tonailfrom boththe inside and outside at
the sametime. Nails may ripthroughand/or fly off,
presenting a grave danger.

On rooftops and other high locations, nail as you
moveforward.
It is easy tolose your footing if you
nail while inchingbackward. When nailing against
perpendicular surface, nail from the top to the
bottom. You can performnailingoperations
with less
fatigue by doing
so.
A nail will be bent or the tool can becomejammed
ifyou mistakenlynailontopof another nailor strike
a knot
in thewood. The nail may bethrownand hit
someone, or the tool itself can react dangerously.
Place the nails
with care.
Do not leave the loaded tool or the air compressor
under pressurefor alongtimeout
in thesun. Be sure
that dust, sand, chips and foreign matter will not
enter thetool
in the placewhere you leave it setting.
*Do not point the ejection port at anyone in the
vicinity. Keephandsandfeet away fromthe ejection
port area.

When the air hose is connected, do not carry the
tool
with your finger on the trigger or hand it to
someone
in this condition. Accidental firing can be
extremely dangerous.
Handle the tool carefully as there is high pressure
inside the tool that can be dangerous
if a crack is
causedby roughhandling(droppingor striking).
Do
not attempt to carve or engrave on the tool.
Stop nailing operations immediately if you notice
something wrong or out of the ordinary
with the
tool.
.Always disconnect the air hose and remove all of
the nailsbeforeinspection, maintenance, relocating,
or after operation is over.

Performcleaning and maintenanceright after finish-
ing the
job. Keep the tool in tip-top condition.
Lubricate moving parts to prevent rusting and
minimize friction relatedwear. Wipe
off all dust from
the parts.
i-----.
Ask Makita's Factory or Authorized service center
for periodical inspection of the tool.
SAVE THESE INSTRUCTIONS.

TOOL INSTALLATION INSTRUCTIONS AND USE
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.
When an air
set is not used, oil the toolwith pneuma-
tic tool oil by placing 2 (two)or 3 (three) drops into
the air fitting. This should be done before and after
use. For proper lubrication, the tool must be fired
a
couple of times after pneumatictool oil is introduced.
7
Pneumatic tool oil
Loading nailer
CAUTION :
Always disconnectthe air hose before loadingnails intothe nailer.
Select nailssuitablefor your work.
Depressthe latch lever and open the magazine cap.
Lift and turn the coil support plate
so that the arrow
with nail
size indicated on the coil support plate will
point to the corresponding graduation increment
marked on the magazine.
If the tool is operated with-
out the arrow pointing to the proper graduation pro-
perly, poor nail feed or malfunction of the tool may
result.
I Latch lever ----
\ I Magazinecap

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.
Place other uncoilded nailson feeder body. Close
the
magazine cap after checking to see that the nail
coil
is set properly inthe magazine.
\Feed Claw
I
Adjusting depth of nailing
CAUTION :
Always disconnectthe air hose beforeadjustingthe depth of nailing.
To adjust the depth of nailing, press the knob toward
the nose tip and turn the adjuster
so that the arrow
above the adjuster will point to the number indicated
on the adjuster. The depth of nailing
is the deepest
when the arrow pointsto the number
1. It will become
shallower
as the arrow points to higher number. The
depth can be changed in approx.
0.8 mm (1/32") in-
crements per graduation.
If nails cannot be drivendeep
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 tothe number
9, decrease
the air pressure.
f I
Adjusting the shingle guide
CAUTION :
Always disconnectthe air hose before adjustingthe shingle guide.
The shingle guide
is designed for consistent shingle
exposure.
Place shingle in desired position. Turn the
lever in the direction
of arrow @ to release the adjust-
ing plate.
Rest the tool on the exposed shingle with the
projections
of the contact element depressing the
bottom of the previous row of the shingle. Slide the
adjusting plate up against the bottom of the exposed
shingle and turn the lever inthe direction of arrow
@
to lock the adjusting plate.
R

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Selectingcompressor
The air compressor must comply with the require-
ments of ANSI B19.3-1981.
Select a compressor that has ample pressure and air
output to assure cost-efficient operation. The graph
shows the relation between nailing frequency, appli-
cable pressure and compressorair output. Thus, for ex-
ample, if nailing takes place
at a rate of approximately
30 times per minute at a compression of 6 kgf/cm2G
(85
PSIG), a compressor with an air output over
30 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 inthe vicinity.
Selecting
air hose
Use an air hose
as large and as short as possible to as-
sure continuous, efficeint nailingoperation. With an air
pressure of
5 kgf/cm2 G (70 PSIG), an air hose with an
internal diameter of over 6.5 mm
(1 7/64") and a
length of less than 20 m (6.6 ft.) is recommended
when the interval between each nailing
is 0.5 seconds.
Air supply hoses shall have
a minimum working pres-
sure rating of 10.7 kgf/cm2
G (150 PSIG) or 150per-
cent of the maximum pressure produced in the system
whichever
is higher.
60
50
E 40
n
n
5 30
z
n
E
-
g 20
9
10
0 10 20 30 40 50 W
Nailing frequency ltimer/min.)
CAUTION :
Low air output of the compressor, or a longor smaller diameter air hose in relation to the nail-
ingfrequency may cause
a decrease in the driving capability of the tool.
Connecting
air hose
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 installedonto the air fitting. A hose
coupling must be installed on or near the tool insuch
a way that the pressure reservoir will discharge at the
time the air supply coupling
is disconnected.

Operation
1) To drive a nail, you may place the contact element
against the workpiece and pullthe
trigger, or
2) Pull the trigger first and then place the contact
element against the workpiece.
No. 1 method is for intermittent nailing, when you
wish to drive
a nail carefully and very accurately.
No. 2 method is for continuous nailing.
CAUTION :
Operatingthe toolwithout nailsshortens the life of the tool and should be avoided.
Jammed nailer
CAUTION :
Always disconnectthe air hose before clearing a jam.
When the nailer becomes jammed, proceed
as follows:
Open the magazine cap and removethe nail coil. Insert
a small rod or the like intothe ejection portand tap it
with a hammer to drive out the nail jamming the ejec-
tion port.
Reset the nail coil and close the magazine
cap.
t B.=
rEjection port
I Small
Nails
Handle nail coils and their box carefully. If the nail
coils have been handled roughly, they may be out of
shape or their connector breaks, causing poor nail feed.
i
Nail
by$

Avoid storing nails in a very humid or hot place or
place exposedto direct sunlight.
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MAINTENANCE
CAUTION :
Always be sure that the air hose is disconnected from the tool before attempting to perform
inspectionor maintenance.
Cleaning and removal of tar and dirt
Adhesion of tar and dirt to
areas aroundthe contactelement will preventsmooth movement of
the contact element (safety mechanism), causing accidental discharge. Periodically clean the
areas around the contact element. Cleaning can be performed easily
if the contact element is
removed. So proceed as follows.
Turn the adjuster
so that the arrow will point between
numbers
1 and 5.
Hold the contact element and press the knob toward
the nose tip. While keeping the knob pressed, turn
it
counterclockwise fully. Then release the knob and re-
move the contact element from the driver guide.
If you
have difficulty removing the contact element because
it is caught by the safety cover, open the magazinecap.
Use
a solvent such as kerosene, #2 fuel oil or diesel
fuel. Immerse only the contact element and the
areas
around the ejection port insolvent and remove tar and
dirt with brush. Always wear waterproof gloves to pro-
tect your hands. Never immersethe housing, magazine,
etc. in solvent. Malfunction of the tool may result.
Always dispose of the solvent used
in a safe and
prudent manner and in compliance with all local and
national code requirement.
1 I Knob
lent
I /Adjuster
Brush \
Ejection port
Dry off the tool before use. Any oil film left after cleanup will acceleratethe tar buildup, and
the tool will require more frequent recleaning. After drying off the tool, oil the moving partsto
prevent rustingand toassure good lubricationand operationor moving parts. Installthe contact
element
on the driver guide. Press the knob toward the nose tip and turnthe knob clockwiseto
secure.
WARNING:
Never use gasoline or other similar highly volatile liquids for cleaning. Vapors of such liquids
may enter the tool and could be ignited by sparks produced during nailingand cause an explo-
sion.

Maintenance of nailer
Always check the tool for its overall condition and
loosescrews before operation. Tighten
as required.
Make sure all safety mechanisms are in working order
before operation. The tool must not operate
if only
the trigger
is pulled or if only the contact element is
pressed against the wood. It must work only when
both actions are performed. Test for possible faulty
operation with nails unloaded.
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////////// /A"mm
When the tool is not to be used for an extended period
of time, lubricate the tool using pneumatictool oil and
store the tool in
a safe place. Avoid exposuretodirect
sunlight and/or
a humid or hot environment.
I

Maintenance of compressor, air set and air hose
After operation, always drain the compressortank and
the air filter. If moisture
is allowed to enter the tool,
it may result in poor performance and possible tool
f ai I ure.
Check regularly to
see if there is sufficient pneumatic
oil in the oiler of the air
set. Failureto maintain suffi-
cient lubrication will cause O-ringstowear quickly.
Keep the air hose away from heat (over 60°C, over
140" F), away from chemicals (thinner, strongacids or
alkalis). Also, route the hose away from obstacles
which
it may become dangerously caught on during
operation. Hoses must also be directed away from
sharp edges and areas which may lead to damage or
abrasionto the hose.
7 Drain cock
\-Air filter
Pneumaticoil 2
I
To maintain product SAFETY and RELIABILITY, maintenance and repairs should be per-
formed by Makita Authorized or Factory Service Centers, always using Makita replacement
parts.

(MEMO)
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MAKITA LIMED ONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leavingthe factory. It is warranted to
be free of defects from workmanship and materials for the period of ONE YEAR from the date of
original purchase. Should any trouble develop during this one-yaperiod, return the COMPLETE
tool, freight prepaid, to one
of Makita’s Factory or Authorized Service Centers. If inspectionshows
the trouble
is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
This Warranty does not apply where:
repain have been made or attemptedby others:
repain are required because of normal wear and tear:
The tool has been abused, misused or improperly maintained;
alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT INCIDENTALOR CON-
APPLIESBOTH DURING AND AFTER THE TERM OF
THIS WARRANTY.
SEQUENTIAL DAMAGES FROM THE SALE OR USE OF THE PROD^. THIS DISCLAIMER
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR A SPECIFIC PURPOSE,”
AFTER THEONE-YEARTERM OFTHISWARRANTY.
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. Some states do not allow the exclusion
or limitation of incidentalor consequential
damages,
so the above limitation or exclusion may not apply to you. Some states do not allow
limitation on how long an implied warranty lasts,
so the above Limitation may not apply to you.
M akita Corporation
3-11 -8,Sumiyoshi-cho,
Anjo, Aichi 446 Japan