Makita AG125 User manual

125 mm (SY) Air Nailer
4.5 - 8.5 kgf/cm*G
(65 - 120 PSIG)
MODEL AG125
\-
75 mm - 125 mm
7.5 mm - 11.0 mm
260 mm x 243 mm x 56 mm
6.5 mm (1/4,,)
1,3 kg (2,9 Ibs)
(3” - 5”) (0.295”
- 0.433”) (10-1/4”
x 9-112” x 2-114”)
INSTRUCTION MANUAL
SPECIFICATIONS
I I
Air pressure I Nail length I Diameter of nail head I
Dimensions
(L x H x W)
1 Min. hose diameter 1
Net weight

IMPORTANT
SAFETY INSTRUCTIONS
WARNING: WHEN USING THIS TOOL, BASIC SAFETY PRECAUTIONS
SHOULD ALWAYS BE FOLLOWED TO REDUCE THE RISK OF PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
For personal safety and proper operation and
maintenance of the tool, read this instruction
manual carefully before using the tool.
Always wear safety glassesto protect your eyes
fromdustor nailinjury. The safetyglassesshould
conformwiththe requirements
of ANSI 287. 1 -
1979.
WARN I NG :
It isan employer’s responsibility to enforce the
useof safetyeye protectionequipmentbythetool
operatorsandbyother persons
in the immediate
working area.
@Wearhearing protection to protect your ears
againstexhaust noiseandheadprotection.
Also
wear lightbutnotlooseclothing. Sleevesshould
be buttoned or rolled up. No necktieshould be
worn.
Rushingthejob orforcing thetoolisdangerous.
Handle the tool carefully.
Do not operate when
underthe influence
of alcohol, drugsorthe like.
’
2

General Tool Handling Guidelines:
1. Always assume that the tool contains fasteners.
2. Do not point the tooltowardyourself or anyonewhether it contains fastenersor not.
3. Do not actuate the tool unless the tool is placed firmly against the workpiece.
4. Respect the tool as a working implement.
5. No horseplay.
6. Do not hold or carry the tool with a finger on the trigger.
7. Do not loadthetool with fasteners whenany one of the operatingcontrols isactivated.
8. Do not operate the tool with any power source other than that specified in the tool
An improperlyfunctioning tool mustnot beused.
operatingkafety instructions.
.Sparks sometimesfly when the tool
is used. Do
not usethetool nearvolatile, flammable materials
suchas gasoline, thinner, paint, gas, adhesives,
etc.; they will igniteandexplode, causingserious
injury.
The area should be sufficiently illuminated to
assure safe operations.
The area should be clear and litter- free. Be
especially careful to maintain good footing and
balance.

Onlythoseinvolved in thework should be in the
vicinity. Childrenespecially mustbekept away at
all times.
There may belocalregulations concerningnoise
which must be compliedwith by keeping noise
levelswithin prescribed limits. Incertain cases,
shutters should be used to contain noise.
.Securing the trigger in the ON position is also
very dangerous. Never attempt to fasten the
trigger.
Do not operate a tool if any portion of the tool
operating controls is inoperable, disconnected,
altered, or not working properly.
Operatethetoolwithinthe specified air pressure
of
4.5 - 8.5 kgf/cmzG (65 - 120 PSIG) for safety
and longer tool life.
Do not exceed the recom-
mended max. operating pressure of
8.5
kgf/cmzG (120 PSIG). The tool should not be
connectedto asourcewhose pressure potentially
exceeds
14.0 kgf/cm'G (200 PSIG).
Shutter
I
8 5 kgf/cm2 G
8 5 kgf/cmzG
(120 PSIG) ( 120 PSIG)
4

.Never use the tool with other than compressed
air. If bottledgas (carbon dioxide, oxgen, nitro-
gen, hydrogen, air, etc.) or combustible gas
(hydrogen, propane, acetylene, etc.) is used as
apowersourcefor thistool, thetoolwillexplode
and cause serious injury.
.Always check the tool for its overall condition
and loose screws before operation. Tighten as
required.
Make sure the safety system is in working order
before operation. The tool must not operate if
only the nail guide ispressedagainst the wood.
Test for possible faulty operation with nails un-
loaded and the adjuster set to the number
1.
Checkwalls, ceilings, floors, roofingandthe like
carefully to avoid possible electrical shock, gas
leakage, explosions, etc. caused by strikinglive
wires, conduits or gas pipes.
COMPRESSED
AIR
Gas pipe Livewire
c

Use only nailsspecified in this manual. The use
of any other nails may cause malfunctionof the
tool.
I
Do notpermit thoseuninstructedtousethetool.
II I I
Makesure noone isnearby before nailing. Never
attempt to nail from boththe inside and outside
at the same time. Nails may rip through and/or
fly
off, presenting a grave danger.
.Watch your footing and maintain your balance
with the tool. Make sure there is no one below
when working inhigh locations, and secure the
air hose to prevent danger if there is sudden
jerking or catching.

Onrooftopsandother highlocations, nailasyou
moveforward. Itiseasytoloseyour footing ifyou
nailwhileinchingbackward. Whennailingagainst
perpendicular surface, nail from the top to the
bottom. You canperformnailingoperationswith
less fatigue by doing
so.
A nailwill bebentorthetoolcanbecomejammed
if you mistakenly nail on top of another nail or
strikea knot
in thewood. The nailmaybethrown
andhitsomeone, orthetool itself canreactdan-
gerously. Place the nails with care.
Do notleavethe loaded tool ortheaircompressor
underpressurefor
a longtimeout in thesun. Be
surethat dust, sand, chipsandforeignmatterwill
not enter the tool
in the place where you leave
it setting.
*Do not point the ejection port at anyone in the
vicinity. Keep hands and feet away from the
ejection port area.
@-
7

When theair hoseisconnected, do notcarrythe
tool with your finger on the trigger or hand itto
someone inthis condition. Accidentalfiring can
be extremely dangerous.
I
Handlethetoolcarefullyas thereishighpressure
insidethe tool that can be dangerous if
a crack
is caused by rough handling(droppingor strik-
ing).
Do not attempt to carve or engrave on the
tool.
Stopnailingoperations immediately if you notice
somethingwrong or out of the ordinary with the
tool.
*Alwaysdisconnectthe air hose and remove the
nail:
1. When unattended.
2. Beforeperformingany maintenanceor repair.
3. Before cleaning a jam.
4. Before moving the tool to a new location.
8

Perform cleaning and maintenance right after
finishing the job. Keepthe tool
in tip-top condi-
tion. Lubricate moving parts to prevent rusting
and minimize friction related wear. Wipe
off all
dust from the parts.
.Do not operate this tool if it does not contain a
legible WARNING LABEL.
Do not modify tool without authorization from
Makita.
Ask Makita's Factoryor Authorizedservicecenter
for periodical inspection of the tool.
To maintain product SAFETY and RELIABILITY,
maintenance andrepairsshouldbeperformed by
Makita Authorized or Factory Service Centers,
always using Makita replacement parts.
SAVE THESE INSTRUCTIONS.
a

TOOL INSTALLATION INSTRUCTIONS AND USE
Selecting compressor
The air compressor must comply with the requirements of
Selecta compressorthat hasample pressureandair output
to assure cost-efficient operation. The graph shows the
relation between nailing frequency and compressor air
output at a compression of 8.5 kgf/cm2G(120 PSIG). Thus,
for example, when you drive about 10 nails 3.75 mm x 90
mm (0.148” x 3-1/2”) per minute, a compressor with an air
output over 55 Uminute is required. Pressure regulators
must be used to limit air pressure to the rated pressure of
the tool where air supply pressureexceedsthe tool’s rated
pressure. Failureto do so may resultinserious injuryto tool
operator or persons in the vicinity.
NOTE: Nail size indicates diameter x length.
ANSI 819.3 - 1981.
Selecting air hose
Usean air hoseas largeandas short as possibleto assure
continuous,efficient nailing operation.With an air pressure
of 5 kgf/cm2G (70 PSIG), an air hose with an internal
diameter of over 8.5 mm (5/16”) 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 pressure rating of 10.7 kgf/cm2G(150
PSIG)or 150 percent of the maximum pressure produced
in the system whichever is higher.
7
-9
QV I
** DI
Wmin 1
At a compression of
8 5 kgf/cm’G (120 PSIG)
I
io 20
Nailingfrequency (timeslmin )
CAUTION :
Lowair output of thecompressor,or a longor smallerdiameterair hoseinrelationtothe nailingfrequency
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
20 nails.
When an air set is not used, oil the tool with pneumatictool
oil by placing 2 (two) or 3 (three) drops into the air fitting.
This should bedone beforeand after use. For proper lubri-
cation, the tool must befired a couple of times after pneu-
matic tool oil is introduced.
T Pneumatic tool oil
Pneumatic
tool oil
10

Selecting nails
CAUTION:
Do not drive hardened steel nails or stainless steel nails into concrete or steel plate. If you do so, the
nailer may be adversely affected.
Always check the size of the nail head with the gauge on
1
the nailguide before loadingthe nailer. Differentsize nails
may be mixed up in the nails you purchase locally.
Do not use nails with a head size larger than D1 or smaller
than D2. Nails with a head size larger than D1 cannot be
inserted into the nail guide. Nails with a head size smaller
than D2 may move into the contact arm and cannot be
driven.
Nail guide
D1
D2
Gauge
I
Loading nailer
CAUTION:
Be careful not to touch the trigger when loading the nail.
*When loading nail into the nailer, grip the nail by the shank, not the tip.
Holdthe nail shank lightly and insert the nail head intothe
nail guide until the nail is held firmly by the magnet.
Nail
Nail
Magnet
1 Nail I
Nail guide Contact arm
Adjusting depth of nailing
CAUTION :
Always disconnect the hose before adjusting the depth of nailing.
To adjust the depth of nailing, turn the adjuster so that the
arrow abovethe adjusterwill point to the number indicated
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 inapprox. 1.5 mm (1/16”) increments per gradua-
tion. If nails cannot be driven deep enough even when the
arrow points to the number 1, increase the air pressure.
Adjuster
11

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 installedontothe air fitting. A hosecoupling must be
installed on or near the tool in such a way that the pres-
sure reservoir will discharge at the time the air supply
coupling is disconnected.
Air fitting
I
Operation
CAUTION:
Make sure the safety system is in working order before operation.
I
To start driving, place the tip of the nail against the driving
surface and pull the trigger.
At the start of driving, apply gentle downward pressure on
the nailer in the arrow direction to hold the nail firmly.
When the impact of the contact arm stops, the driving
operation isover. If the nail is not driven deepenough, place
the ejection port of the nailer over the nail head. Pressthe
nailer againstthe driving surface firmly and pull the trigger
to do additional driving of the nail.
I
Drivingsurface
NOTE:
The nailer will not operate unless you apply sufficient pressureto the contact arm. If this occurs, apply
forward pressure to the nailer again while pulling the trigger to start operation.
Nailing with one or two impacts
When you need to position a nail or drive a shallow nail:
1. Set the tip of the nail firmly against the driving surface.
2. Pull the trigger.
3. Withdawthe nailer from the driving surface immediately
after one or two impacts.
@ Set the tip of the nailfirmly
r againstdrivingsurface.
nailerfromdrivingsurface
immediatelyafterone or
two impacts.
NOTE:
The impactswill continue as long as you keepthe nailer pressed up against the driving surface, even
if you release the trigger.
Nailing in metal plate holes
CAUTION:
Always makesure that the tip of the nail is inserted in the
hole in the metal plate before you start nailing.
12

Air exhaust
Air exhaust direction can be changed easily by rotating the
exhaust cover. Change it when necessary.
Jammed nailer
CAUTION:
Always disconnect the hose before cleaning a jam.
When the nailer becomes jammed, do as follows:
Use pliers to bend the jammed nail so that the nail head
comesout of the nail guide.Then removethejammed nail.
After removing the jammed nail, make sure that the nail
guide and the contact arm move smoothly.
Hook
The hook isconvenientfor hangingthetooltemporarily.This
hook can be installed on either side of the tool.
To remove the hex wrench 3 from the hook, press up on
the end of the hex wrench as shown in the figure.
CAUTION :
Always disconnect the hosewhen hangingthe tool using
the hook.
Always tighten the hook securing bolt firmly.
Never hangthe tool on awaist beltor the like. Dangerous
accidental firing may result.
Exhaust cover
Pliers
Nail guide
Nail

Nails
Avoid storing nails in a very humid or hot place
or place exposed to direct sunlight.
MAINTENANCE
CAUTION:
Always disconnect the hose before attempting to perform inspection or maintenance.
Maintenance of nailer
Always check thetool for itsoverallcondition and
loose screws before operation. Tighten as re-
quired.
With tool disconnected, makedaily inspection to
assure free movement of the nail guide and
trigger. Do not use tool if the nail guide or trigger
sticks or binds.
When the tool is not to be used for an extended period of time, lubricate the tool using pneumatic
tool oil and store the tool in a safe place. Avoid exposure to direct sunlight andlor a humid or hot
environment.
14

Maintenance of compressor, air set and air hose
After operation, always drain the compressor tank and the air filter. If moisture is allowed to enter the
tool, it may result in poor performance and possible tool failure.
r- Drain cock
Check regularly to see if there is sufficient pneu-
maticoil inthe oiler of the air set. Failure to main-
tain sufficient lubrication will cause O-rings to
wear quickly.
Keepthe air hose away from heat(over6OoC,over
14OoF),away from chemicals(thinner,strongacids
or alkalis).Also, routethe hoseaway from obsta-
cleswhich it may becomedangerouslycaughton
during operation. Hoses must also be directed
away from sharp edgesand areaswhich may lead
to damage or abrasion to the hose.
Oiler 7
Pneumatic oil 2
To maintainproductSAFETY and RELIABILITY,maintenanceand repairsshould beperformedby Makita
Authorized or Factory Service Centers, always using Makita replacement parts.

MAKITA LIMITEDONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to
be free of defects from workmanship and materials for the period of ONE YEAK from the date of
original purchase. Should any trouble develop during this one-year period, return the COMPLETE
tool, freight prepaid, to one of Makita’s Factory or Authorized Service Centers. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
ThisWarranty does not apply where:
0 repairs have been made or attempted by others:
0 repairs are required because of normal wear and tear:
0 The tool has been abused, misused or improperly maintained;
0 alterationshave been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON-
SEQUENTIAL DAMAGES FROM THE SALE OR USE OFTHE PRODUCT. THIS DISCLAIMER
APPLIES BOTH DURING AND AFTER THE TERM OFTHIS WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR A SPECIFIC PURPOSE,”
AFTER THE ONE-YEAR TERM OFTHIS WARRANTY.
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 incidental or 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.
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
884277 - 065
PRINTED IN JAPAN
1999 - 9 - N