Hitachi Nr90aes Owners Manual

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11
BEFORE OPERATION
Read section titled “SAFETY” (pages 4 – 7).
Make sure of the followings before operation.
WORKING ENVIRONMENT
WARNING
●No flammable gas, liquid or other
flammable objects at worksite.
●Clear the area of children or
unauthorized personnel.
AIR SUPPLY
DANGER
●NEVER use oxygen or
other bottled
gases. Explosion may
occur.
WARNING
●Never connect Nailer to pressure which
potentially exceeds 200 psi (13.7 bar
14 kgf/cm
2).
●Never use non relieving coupler on
Nailer.
1. Power source

Use only clean, dry, regulated
compressed air as a power source for
this Nailer.

Air compressors used to supply
compressed air to this Nailer must
comply with the requirements of the
latest version of ANSI Standard B 19.3
“Safety Standard For Compressors For
Process Industries”.

Moisture or oil in the air compressor may
accelerate wear and corrosion in the
Nailer.
Drain daily.
2. Filter-Regulator-Lubricator

Use a regulator with a pressure range of
0 – 120 psi (0 – 8.3 bar 0 – 8.5 kgf/cm
2).

Filter-regulator-lubricator units supply
an optimum condition for the Nailer and
extend the Nailer life.
These units should always be used.
Filter ............The filter removes
moisture and dirt mixed in
compressed air.
Drain daily unless fitted
with an automatic drain.
Keep the filter clean by
regular maintenance.
Regulator .... The regulator controls the
operating pressure for safe
operation of the Nailer.
Inspect the regulator
before operation to be sure
it operates properly.
Lubricator ... The lubricator supplies an
oil mist to the Nailer.
Inspect the lubricator
before operation to be sure
the supply of lubricant is
adequate.
Use Hitachi pneumatic tool
lubricant.
3. Air hose

Air hose must have a minimum working
pressure rating of 150 psi (10.4 bar 10.6
kgf/cm
2) or 150% of the maximum
pressure produced in the system,
whichever is higher.
4. Air consumption
Using the Air consumption table and the
Air compressor size formula, find a
correct compressor size. Nailer
Side
Filter
LubricatorCompressor
Side Regulator
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Air consumption table
Air compressor size formula
Amount of air required
= number of Nailers
× average nails driven each minute
per Nailer
× air consumption at given air
pressure
× safety factor (always 1.2)
Example: 2 Nailers operating at 100 psi
driving 30 nails per minute
Amount of air required
= 2 × 30 × .088 (2.5) × 1.2
= 6.3 CFM (ft
3/min) (180 ltr/min)
After making the calculations as shown
above, you should find a compressor
providing 6.3 CFM of air that is required.
LUBRICATION
It is important that the Nailer be properly
lubricated.
Without proper lubrication, the Nailer will not
work properly and parts will wear
prematurely.

Use Hitachi pneumatic tool lubricant.
Do not use detergent oil or additives.
These lubricants will harm the O-rings
and other rubber parts. This will cause
the Nailer to malfunction.

Filter-regulator-lubricator units should
always be used.
Keep the lubricator filled with Hitachi
pneumatic tool lubricant.

If a lubricator is not available, supply 5 –
10 drops of Hitachi pneumatic tool
lubricant into the air plug on the Nailer
twice a day.
COLD WEATHER CARE

Do not store the Nailer in a cold weather
environment.
Keep the Nailer in a warm area until
beginning the work.

If the Nailer is already cold, bring it in a
warm area and allow the Nailer to warm
up before use.
1Reduce the air pressure to 64 psi (4.4
bar 4.5 kgf/cm
2).
2Remove all nails from the Nailer.
3Connect the air hose and free-fire
(blank-fire) the Nailer.
The lowered air pressure will be
enough to free-fire the Nailer.
Slow speed operation tends to warm
up the moving part.
CAUTION:
●Do not free-fire the Nailer at high pressure.
TESTING THE NAILER
DANGER
●Operators and others in
work area MUST wear
safety glasses with side
shields which conforms
to ANSI Z87.1
specifications.
WARNING
●Never use Nailer unless push lever is
operating properly.
psi 80 90 100
Operating
(bar) (5.5) (6.2) (6.9)
pressure
(kgf/cm
2)(5.6) (6.3) (7)
Air ft
3/cycle .062 .075 .088
consumption (ltr/cycle) (1.7) (2.1) (2.5)
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Set the switching device to the upward
position (SINGLE SEQUENTIAL
ACTUATION MECHANISM).
(Set the switching device to the upward
position completely as shown in the
diagram. Otherwise, it will not operate
properly.)
          
THE NAILER MUST NOT LEAK AIR.
(3) Remove the finger from the trigger and
press the push lever against the
workpiece.
THE NAILER MUST NOT OPERATE.
      
(4)Separate the push lever from the
workpiece.
Next, point the nailer downward, pull the
trigger and then wait in that position for
5 seconds or longer.
THE NAILER MUST NOT OPERATE.
Before actually beginning the nailing work,
test the Nailer by using the checklist below.
Conduct the tests in the following order.
If abnormal operation occurs, stop using the
Nailer and contact a Hitachi authorized serv-
ice center immediately.
(1) DISCONNECT AIR HOSE FROM NAILER.
REMOVE ALL NAILS FROM NAILER.
ALL SCREWS MUST BE
TIGHTENED.
If any screws are loose, tighten
them.
THE PUSH LEVER AND TRIGGER
MUST MOVE SMOOTHLY.
(2) Adjust the air pressure to 70 psi (4.9 bars
5 kgf/cm2).
Connect the air hose.
Do not load any nails in the Nailer.Trigger
Do not connect
air hose
Push Lever
Depress Push Lever Do not pull Trigger
Pull Trigger
Switching Device
Upward position
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(5)1Without touching the trigger,
depress the push lever against the
workpiece.
Pull the trigger.
THE NAILER MUST OPERATE.
2Remove the finger from the trigger.
Nailer operation will end (the driver
blade will return to the top).
(6)Set the switching device to the
downward position (CONTACT
ACTUATION MECHANISM).
(Set the switching device to the
downward position completely as
shown in the diagram. Otherwise, it will
not operate properly.)
            
With the Nailer off the workpiece, pull
the trigger.
Depress the push lever against the
workpiece.
THE NAILER MUST OPERATE.
(7) If no abnormal operation is observed,
you may load nails in the Nailer.
Drive nails into the workpiece that is the
same type to be used in the actual
application.
THE NAILER MUST OPERATE
PROPERLY.
ADJUSTING AIR PRESSURE
WARNING
●Do not exceed 120 psi (8.3 bar 8.5 kgf/
cm2).
Adjust the air pressure at recommended
operating pressure 70 – 120 psi (4.9 – 8.3 bar
5 – 8.5 kgf/cm
2) according to the length of
nails and the hardness of workpiece.
The correct air pressure is the lowest pressure
which will do the job. Using the Nailer at a
higher than required air pressure
unnecessarily over stresses the Nailer.
LOADING NAILS
WARNING
●When loading nails into Nailer,
1) do not pull trigger;
2) do not depress push lever; and
3) keep Nailer pointed downward.
(1)Insert nail strip into the back of the
magazine.
Switching Device
Downward position
Magazine
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Removing the nails:
1Pull the nail feeder (B) backward.
2Return the nail feeder (B) forward quietly
while pushing the nail feeder (A).
3Push the nail stopper toward the
magazine side, and pull out nails from
the back of the magazine.(2)Slide the nail strip forward in the
magazine.
The nail strip should pass the nail
stopper.
(3) Pull the nail feeder (B) back to engage
the nail feeder (A) to the nail strip.
NOTE:
●Quietly push the Nail Feeders (A) and (B)
against the nail.
If the Nail Feeders (A) and (B) are released
from backward the magazine and bumped
against the nail, the connecting paper of
the nail can be damaged.
●Use nail strip of more than 5 nails.
The Nailer is now ready to operate.
NAILER OPERATION
Read section titled “SAFETY”(pages 4 – 7).
DANGER
●Operators and others in
work area MUST wear
safety glasses with side
shields which conforms
to ANSI Z87.1
specifications.
WARNING
●NEVER point tool
at yourself or
others in work
area.
Nail Stopper
Nail Feeder (B)
Nail Feeder (A)
51
2
Nail Feeder (B)Nail Feeder (A)
3Nail Stopper
Nails
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●Keep fingers AWAY from trigger when
not driving nails to avoid accidental
firing.
●Choice of triggering method is
important.
Please read and understand “Methods
of Operation” below.
●Before starting work, check the nailing
operation switching device.
This Hitachi nailer includes a nailing
operation switching device.
Before starting work, make sure that
the switching device is properly set.
If the switching device is not set
properly, the nailer will not operate
correctly.
●Never place your hands or feet closer
than 8 inches (200 mm) from firing head
when using.
●Do not drive nails on the top of other
nails or with Nailer at too steep of an
angle; nails can ricochet and hurt
someone.
●Do not drive nails into thin boards or
near corners and edges of workpiece.
Nails can be driven through or away
from workpiece and hit someone.
●Never drive nails from both sides of a
wall at the same time. Nails can be
driven into and through the wall and
hit a person on the opposite side.
●Never use Nailer which is defective or
operating abnormally.
●Do not use Nailer as hammer.
●Disconnect air hose from Nailer when:
1) it is not in use;
2) leaving work area;
3) moving it to another location; and
4) handing it to another person.
This Hitachi nailer is equipped with a nailer
operation switching device.
Use SINGLE SEQUENTIAL ACTUATION
MECHANISM or CONTACT ACTUATION
MECHANISM in accordance with the work
to be performed.Explanation of the various nailing operations

SINGLE SEQUENTIAL ACTUATION
MECHANISM: First, press the push lever
against the workpiece; next, pull the
trigger to drive the nail.
After nailing once, nailing will not be
possible again until the trigger is
released and pressed again.

CONTACT ACTUATION MECHANISM:
First, press the push lever against the
workpiece; next, pull the trigger to drive
the nail.
First, pull the trigger; next, press the
push lever against the workpiece to drive
the nail.
If the trigger is held back, a nail will be
driven each time the push lever is
pressed against the workpiece.
METHODS OF OPERATION
This Nailer is equipped with the push lever
and does not operate unless the push lever
is depressed (upward position).
There are two methods of operation to drive
nails with this Nailer.
They are:
1. Intermittent operation (Trigger fire):
2.Continuous operation (Push lever
fire):
(1) Intermittent operation (Trigger fire)
Use the SINGLE SEQUENTIAL
ACTUATION MECHANISM setting.
WARNING
●For intermittent operation, set the
switching device to the upward
position completely. (i.e. Set to SINGLE
SEQUENTIAL ACTUATION
MECHANISM.)
●To avoid double firing or accidental
firing due to recoil.
1) Set the switching device to SINGLE
SEQUENTIAL ACTUATION
MECHANISM.
2) Pull the trigger rapidly and firmly.
1Set the switching device to the
upward position (to set to SINGLE
SEQUENTIAL ACTUATION
MECHANISM).
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WARNING
●To avoid double firing or accidental
firing due to recoil.
1) Do not press the nailer against the
wood with excessive force.
2)Separate the nailer from the wood as
it recoils after nailing.
1Set the switching device to the
downward position (to set to CONTACT
ACTUATION MECHANISM).
(Set the switching device to the
downward position completely as
shown in the diagram. Otherwise, it will
not operate properly.)
2Pull the trigger with the Nailer off the
workpiece.
3Depress the push lever against the
workpiece to drive a nail.
4Move the Nailer along the workpiece
with a bouncing motion.
Each depression of the push lever will
drive a nail.
As soon as the desired number of nails
have been driven, remove finger from the
trigger.
    
(Set the switching device to the
upward position completely as shown
in the diagram. Otherwise, it will be
set to CONTACT ACTUATION
MECHANISM.)
2Position the nail outlet on the
workpiece with finger off the trigger.
3Depress the push lever firmly until it
is completely depressed.
4Pull the trigger to drive a nail.
5Remove finger from the trigger.
To continue nailing in a separate location,
move the nailer along the wood, repeating
steps 2 - 5 as required.
   
WARNING
●A nail will fire each time the trigger is
depressed as long as the push lever
remains depressed.
(2) Continuous operation (Push lever fire)
Using CONTACT ACTUATION
MECHANISMSwitching Device
1 Upward position
Switching Device
1 Downward position
Previously pull the trigger
Push Lever 4
2
Trigger
Push Lever 3
4
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2) remove all nails from the Nailer;
3)supply 5 – 10 drops of Hitachi
pneumatic tool lubricant into the air
plug on the Nailer; and
4)open the petcock on the air compressor
tank to drain any moisture.
ADJUSTING THE NAILING DEPTH
To assure that each nail penetrates to the
same depth, be sure that:
1) the air pressure to the Nailer remains
constant (regulator is installed and
working properly), and
2) the Nailer is always held firmly against
the workpiece.
If nails are driven too deep or shallow into
the workpiece, adjust the nailing in the
following order.
1DISCONNECT AIR HOSE FROM NAILER.
 
2If nails are driven too deep, turn the
adjuster to the shallow side.
If nails are driven too shallow, turn the
adjuster to the deep side.
WARNING
●Keep your finger off the trigger except
during fastening operation, because
serious injury could result if the push
lever accidentally contacts you or
others in work area.
●Keep hands and body away from the
discharge area. This Hitachi nailer may
bounce from the recoil of driving a
fastener and unwanted subsequent
fastener may be driven, possibly
causing injury.
●Some types of loaded nails can spark
out of the muzzle during a nail driving
operation. Exericise caution!
The SINGLE SEQUENTIAL ACTUATION
MECHANISM is for use where precision
fastener placement is desired.
The SINGLE SEQUENTIAL ACTUATION
MECHANISM may reduce the possibility of
bodily injury to you or others in the work
area compared to the CONTACT
ACTUATION MECHANISM. This is because
it is less likely to drive an unwanted nail if
you keep the trigger pulled and accidentally
bump the push lever against yourself or
others.
The SINGLE SEQUENTIAL ACTUATION
MECHANISM may also reduce the speed of
operation compared to the CONTACT
ACTUATION MECHANISM. The SINGLE
SEQUENTIAL ACTUATION MECHANISM is
recommended to inexperienced users.
NOTE:
●If all warnings and instructions are
followed, safe operation is possible with
all two systems: SINGLE SEQUENTIAL
ACTUATION MECHANISM and CONTACT
ACTUATION MECHANISM.
●Always handle nails and package
carefully. If nails are dropped, collating
plastic may be broken.
●After nailing:
1) disconnect air hose from the Nailer;
Adjuster
Disconnect air hose 15
2
Too Deep
Flush Turn Adjuster
Turn Adjuster
Flush 2
Too Shallow
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3Stop turning the adjuster when a suitable
position is reached for a nailing test.
4Connect the air hose.
ALWAYS WEAR EYE PROTECTOR.
Perform a nailing test.
CAUTION
●Check that the nail feeder slides smoothly
by pulling it with finger.
If not smooth, nails can be driven at an
irregular angle and hurt someone.
2. Storing

When not in use for an extended period,
apply a thin coat of the lubricant to the
steel parts to avoid rust.

Do not store the Nailer in a cold weather
environment.
Keep the Nailer in a warm area.

When not in use, the Nailer should be
stored in a warm and dry place.
Keep out of reach children.
3. WARNING LABEL
Change the WARNING LABEL if missing
or damaged.
A new WARNING LABEL is available
from a Hitachi authorized service center.
   MAINTENANCE AND
INSPECTION
Read section titled “SAFETY” (pages 4 – 7).
WARNING
●Disconnect air hose and remove all nails
from Nailer when:
1) doing maintenance and inspection;
and
2) clearing a jam.
1. Inspecting the magazine
1DISCONNECT AIR HOSE.
2Clean the magazine. Remove paper
chips or wooden chips which may have
accumulated in the magazine. Lubricate
it with Hitachi pneumatic tool lubricant.
MAINTENANCE
NOTE:
The information contained in this Manual is designed to assist you in the safe
maintenance of the Nailer.
Some illustrations in this Manual may show details or attachments that differ
from those on your own Nailer.
ClothDisconnect
air hose 1
Warning Label 5DISCONNECT AIR HOSE FROM NAILER.
6Choose a suitable position for the
adjuster.
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MODIFICATIONS
Hitachi Power Tools are constantly being
improved and modified to incorporate
the latest technological advancements.
Accordingly, some parts (i.e. code
numbers and/or design) may be
changed without prior notice.
SERVICE AND REPAIRS
WARNING
●Only service personnel trained by
Hitachi, distributor or employer shall
repair the Nailer.
●Use only parts supplied or
recommended by Hitachi for repair.
All quality Nailers will eventually require
servicing or replacement of parts because of
wear from normal use.
NOTE:
Specifications are subject to change
without any obligation on the part of
HITACHI. 4. Maintenance chart (See page 20)
5. Operator troubleshooting (See page 21)
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
●Repair, modification and inspection of
Hitachi Power Tools must be carried out
by a Hitachi Authorized Service Center.
This Parts List will be helpful if presented
with the tool to the Hitachi Authorized
Service Center when requesting repair or
other maintenance. In the operation and
maintenance of power tools, the safety
regulations and standards prescribed in
each country must be observed.
Maintenance chart
ACTION WHY HOW
Drain air line filter daily. Prevent accumulation of Open manual petcock.
moisture and dirt.
Keep lubricator filled. Keep the Nailer Fill with Hitachi pneumatic
lubricated. tool lubricant.
Clean filter element — then Prevent clogging of filter Follow manufacturer’s
blow air through filter in with dirt. instructions.
direction opposite to
normal flow.
Clean magazine and feeder Prevent a jam. Blow clean daily.
mechanism.
Keep push lever working Promote operator safety and Blow clean daily.
properly. efficient Nailer operation.
Lubricate the Nailer after Extend the Nailer life. Supply 5 – 10 drops of
nailing. lubricant into the Nailer.
Drain air compressor. Keep the Nailer operated Open petcock on air
properly. compressor tank.
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