Hitachi NT 65GB Technical Data And Service Manual

Brand: Hitachi

Model: NT 65GB

Category: Water heaters & boilers

Type: Technical Data And Service Manual

GAS FINISH NAILER

NT 65GB

E047

Aug. 2011

REMARK:

Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the

place of company name(s) and model name(s) of our competitor(s).

The symbol(s) utilized here is(are) as follows:

Competitors

Symbols Utilized

Company Name Model Name

P Paslode 900600 (USA)/IM65AF16 (EU)

CONTENTS

Page

1. PRODUCT NAME------------------------------------------------------------------------------------------------------ 1

2. MARKETING OBJECTIVE ------------------------------------------------------------------------------------------ 1

3. APPLICATIONS -------------------------------------------------------------------------------------------------------- 1

4. SELLING POINTS ----------------------------------------------------------------------------------------------------- 1

5. SPECIFICATIONS ---------------------------------------------------------------------------------------------------- 2

5-1. Specifications ---------------------------------------------------------------------------------------------------- 2

5-2. Explanation of the Nailing Action ---------------------------------------------------------------------------- 2

5-3. Nail Selection ----------------------------------------------------------------------------------------------------- 3

5-4. Nail Driving Force------------------------------------------------------------------------------------------------ 3

6. COMPARISON WITH SIMILAR PRODUCTS ------------------------------------------------------------------ 4

7. PRECAUTIONS ON SALES PROMOTION--------------------------------------------------------------------- 5

7-1. Handling Instructions ------------------------------------------------------------------------------------------- 5

7-2. Warning Label ---------------------------------------------------------------------------------------------------- 5

7-3. Related Laws and Regulations------------------------------------------------------------------------------- 7

8. MECHANISM AND PRINCIPLE OF OPERATION ------------------------------------------------------------ 9

8-1. Mechanism ------------------------------------------------------------------------------------------------------- 9

8-2. Principle of Operation ------------------------------------------------------------------------------------------11

9. TROUBLESHOOTING GUIDE -------------------------------------------------------------------------------------15

9-1. Problems Caused by Improper Handling -----------------------------------------------------------------15

9-2. Troubleshooting and Corrective Action --------------------------------------------------------------------17

9-3. Checking for Sparking and Corrective Action ------------------------------------------------------------23

9-4. Regrinding the Driver Blade ----------------------------------------------------------------------------------24

10. DISASSEMBLY AND REASSEMBLY --------------------------------------------------------------------------24

10-1. General Precautions on Disassembly and Reassembly ---------------------------------------------24

10-2.

Disconnecting and Reconnecting Wiring between

the

Cylinder Head Section and Handle Section ------------------------------------------------------ 26

10-3. Disassembly and Reassembly of the Cylinder Head Section --------------------------------------29

10-4. Disassembly and Reassembly of the Housing Section ----------------------------------------------31

10-5. Disassembly and Reassembly of the Handle Section -----------------------------------------------42

11. STANDARD REPAIR TIME (UNIT) SCHEDULES-----------------------------------------------------------48

Assembly Diagram for NT 65GB

-1-

1. PRODUCT NAME

Hitachi 65 mm (2-1/2”) Gas Finish Nailer, Model NT 65GB

2. MARKETING OBJECTIVE

These days one company has been monopolizing the gas nailer market. We will enter the finish

nailer market by releasing the new Model NT 65GB Gas Finish Nailer to expand our market share.

The main features of the Model NT 65GB are as follows:

(1) Compact and lightweight, with lithium-ion batteries

(2) Battery located at end of the handle for better balance

(3) New aggressive appearance

(4) 2-action nail feeding

(5) Comfortable grip

(6) Fully charged in one hour

(7) Two lithium-ion batteries included

(8) AC charger and DC charger (car battery charger) included

3. APPLICATIONS

• Finish-nailing of door casings and similar frame assemblies.

• Fastening of drawer bottoms and similar assembly work in the construction of various cabinets

and cases.

4. SELLING POINTS

Lightweight, only 1.8 kg (4.0 lbs.) and good balance

Comfortable grip

Hook is attachable

on either side

Easy-to-use, clogged nail

release mechanism

Fully charged in one

hou

AC/DC charger

New aggressive

earance

Tool-less depth

ustment

2-action nail feeding

-2-

5. SPECIFICATIONS

5-1. Specifications

(1) Gas finish nailer

Model

Item

NT 65GB

Driving system

Reciprocating piston type

Weight 1.8 kg (4.0 lbs.)

Dimensions

(length x height x width)

268 x 282 x 85 mm

(10-5/8” x 11-1/8” x 3-3/8”)

Nail feed system

Ribbon spring

Nail capacity

100 nails (2 strip)

Packaging

Plastic case

Package dimensions

(length x height x width)

500 x 460 x 150 mm

(19-11/16” x 18-5/32” x 5-29/32”)

420 x 427 x 165 mm

(16-35/64” x 16-13/16” x 6-1/2”)

Standard accessories

-For North America-

• Safety glasses (Code No. 875769)

• Battery (Code No. 324147) x 2

• UC 3SML Charger

(with AC/DC adapter)

• Case (Code No. 886857)

• Allen wrench for M5 screws

(Code No. 944458)

• Allen wrench for M4 screws

(Code No. 943277)

• Nose Cap (Code No. 886349)

-For Europe-

• Safety glasses (Code No. 885549)

• Battery (Code No. 324148) x 2

• UC 3SML Charger

(with AC/DC adapter)

• Case (Code No. 886857)

• Allen wrench for M5 screws

(Code No. 944458)

• Allen wrench for M4 screws

(Code No. 943277)

• Nose Cap (Code No. 886349)

Optional accessories

-For North America-

• Lubricant oil (A)

(Code No. 885546)

• Fuel cell (Code No. 728981)

• Grease (Code No. 317918)

• UC 3SFL Charger

-For Europe-

• Lubricant oil (A)

(Code No. 885246)

• Fuel cell (Code No. 753700)

• Grease (Code No. 317918)

• UC 3SFL Charger

5-2. Explanation of the Nailing Action

To meet the requirements of "ANSI SNT-101-2002" (USA), the Model NT 65GB is equipped with

a FULL SEQUENTIAL ACTUATION MECHANISM.

• FULL SEQUENTIAL ACTUATION MECHANISM

First, press the pushing lever against the wood, and then pull the trigger to drive the nail. After

nailing once, nailing will not be possible again until you release the trigger and press the lever

again.

-3-

Required nailing energy Nailer output energy

Size of nail

0.10

80 100 120

38 mm

(

1-1/2”

)

45 mm

(

1-3/4”

)

50 mm

(

2”

)

65 mm

(

2-1/2”

)

Nail: d x L

(mm

)

(in

)

[J]

[lt-lb]

[J]

[lt-lb]

67 8

6788.5

(bar)

(kg/cm

)

(psi)

80 90 110100 120

ir pressure setting of NT 65M2 to drive nail flush

NT 65GB

NT 65M2

Hand Wood

Nailer out

ut ener

Required nailing energy

2.8 mm (.110”)

1.4 mm

(.055”)

1.65 mm

(.065”)

32 mm (1-1/4”)

1.3 mm (.051”)

65 mm

(

2-1/2”

)

5-3. Nail Selection

The Model NT 65GB utilizes small-head, T-shaped nails (finish nails) collated by adhesive.

Applicable nails are shown below.

CAUTION: Ensure that nails are as specified in Fig. 1. The use of other nails will cause the

clogging of nails and subsequent nail damage.

NT 65GB

Min. Max.

Fig. 1 Nail dimensions

5-4. Nail Driving Force

In contrast to a pneumatic nailer, a gas nailer’s output energy is not optional. However, output

energy can be altered by such environmental conditions as ambient temperature, humidity and

altitude, which affect combustion. Fig. 2 below compares the output energy range of the Model

NT 65M2 and other pneumatic nailers, with that of the Model NT 65GB Gas Finish Nailer. The

output energy of the Model NT 65GB changes within an operating range of 5.4 kg/cm

(76.8 psi)

to 5.8 kg/cm

(82.5 psi) due to the conversion to air pressure of the Model NT 65M2. Always

select suitable nails and workpieces according to the output energy of this nailer.

Fig. 2 Required nailing energy and nailer output energy

16 Gauge finish nails

(Angle: 20

°)

-4-

6. COMPARISON WITH SIMILAR PRODUCTS

Maker

Model

Item

HITACHI

NT 65GB

Weight

(tool, battery, fuel cell)

1.8 kg (4.0 lbs.) 2.3 kg (5.1 lbs.)

Dimensions (L x H x W)

268 x 282 x 85 mm

(10-5/8 “ x 11-1/8” x 3-3/8”)

273 x 292 x 90 mm

(10-3/4” x 11-1/2” x 3-1/2”)

Dia. 1.4 to 1.65 mm (0.055” to 0.065") 2.9 to 3.3 mm (0.113 to 0.131")

Applicable nails

(Clip head)

Length

25 to 65 mm (1” to 2-1/2") 20 to 65 mm (3/4” to 2-1/2")

Nail capacity 100 nails (2 strip) 100 nails (2 strips)

Magazine type Rear loading Rear loading

Feeder 2-action nail feeding 2-action nail feeding

No-nail driving prevention

mechanism

Provided Provided

Driving depth

adjusting mechanism

Tools not required Tools not required

Jam release

Single-touch operation

by hand

Single-touch operation

by hand

Hook

Attachable on either right

or left sides

Fixed on left side

Handle grip Rubber Rubber

Driving method Single action Single action

Driving speed 2 to 3 pcs./sec. 2 to 3 pcs./sec.

Battery voltage 3.6 V 6 V

Charging time 1 hour 2 hour

Driving times on a fully

charge battery

Approx. 2,000 pcs. Approx. 4,000 pcs.

Fuel cell dimensions ø31.5 x 80 mm ø31.5 x 80 mm

Fuel cell service life 1,200 nails 1,200 nails

HITACHI

USA EU

Can size diameter (mm) 31.5 31.5 31.5

Height (mm) 80 80 80

Contents 18 g 20 g 18 g

Fuel cell service life (nails/cell) 1,200 1,200 1,000

Ambient temperature

(degrees Celsius)

0 to 40 *

-7 to 49

(+5 to 40)

Max. temperature for storage

(degrees Celsius)

50 49 50

728-981/1 cellPart no. for USA

for EU

753-700/1 cell

*1: Because of gas restriction for aerosol standard

-5-

7. PRECAUTIONS ON SALES PROMOTION

In the interest of promoting the safest and most efficient use of the Model NT 65GB Gas Finish

Nailer by all of our customers, it is very important when concluding a sale that the salesperson

carefully ensure that the buyer seriously recognizes the importance of the Handling Instructions,

and fully understands the precautions listed on the Warning Label attached to each tool.

7-1. Handling Instructions

Although every effort is made in each step of design, manufacture, and inspection to provide

protection against safety hazards, the dangers inherent in the use of any pneumatic tool cannot

be completely eliminated. Accordingly, the Handling instructions list general precautions and

suggestions on the use of precautions tools, and specific precautions and suggestions on use of

the pneumatic nailer, in order to enhance the safe, efficient use of the tool by the customer.

Salespersons must be thoroughly familiar with the Handling Instructions to be able to offer

appropriate guidance to customers during sales promotion activities.

7-2. Warning Label

Each Model NT 65GB unit is provided with a Warning Label (illustrated below) that lists basic

safety precautions on use of the tool. Carefully ensure that customers fully understand and follow

these precautions before using the tool.

[For the USA and Canada]

-6-

[For Europe]

Fuel cell

[For the USA and Canada]

OK Befestigung D-47802 Krefeld, Germany (www.okbefestigung.de)

PATENT PENDING

Contents: Compressed flammable liquefied gas Made in Germany 18 g/30 ml

DANGER - EXTREMELY FLAMMABLE

CONTENTS UNDER PRESSURE.

• Keep away from temperatures over 50

°C < 120°F >(for ex., sun radiation).

• Do not damage, puncture or burn even after use.

KEEP OUT OF THE REACH OF CHILDREN.

IN USE, MAY FORM FLAMMABLE/EXPLOSIVE VAPOR-AIR MIXTURE.

• Do not use near flames or spray on heated surface.

• Keep away from ignition sources.

• Use only outside or in well-ventilated rooms.

• Keep container in well-ventilated place.

• No smoking.

KEEP AWAY FROM SKIN AND EYES and DO NOT BREATHE GAS,

for SKIN AND EYE IRRITANT and VAPOR HARMFUL.

DO NOT REFILL.

[For EU]

OK Befestigung D-47802 Krefeld, Germany (www.okbefestigung.de)

PATENT PENDING

100 3 e < 50 Made in Germany 18 g/30 ml

DANGER - EXTREMELY FLAMMABLE • Contents under pressure, keep away from temperatures

over 50

°C < 120°F > (for ex., sun radiation). • Do not use near flames or spray on heated surfaces.

• Use only outside or in well ventilated rooms. • Throw away only at designated areas.

• Keep out of the reach of children. • Do not damage, puncture or burn even after use.

• In use, may form flammable/explosive vapor - air mixture. • Keep container in a well ventilated place.

• Do not breathe gas. • Keep away from ignition sources. • No smoking. • Do not refill.

50°C max.

(120F)

-7-

7-3. Related Laws and Regulations

As nailers and staplers are designed to instantaneously drive nails and staples, there is an ever-

present danger of misfiring and possibly serious injury. Accordingly, close attention to handling is

absolutely necessary at all times. Carefully ensure that the customer is fully aware of the

precautions listed in the Handling Instructions provided with each unit.

While there are no specific safety regulations, there are related items in various general safety

regulations with which salespersons should be familiar, in order to properly advise the customer.

Please check your national and/or local regulations for applicable items. Some applicable items

are outlined below.

For the USA:

OSHA 1926.102 Eye and face protection

1926.302 Power-operated hand tools

ANSI SNT-101-2002 Portable, Compressed-Air-Actuated,

Fastener Driving Tools-Safety Requirements for

For Europe:

EN 792-13 2000 Hand-held-non-electric power tools

EN 60745-1 2006 Hand-held-motor-operated electric tools

EN 60335 2002 Household and similar electrical appliances

EN 55014 Electromagnetic compatibility

EN 61000 Electromagnetic compatibility (EMC)

-8-

Cautions on handling the fuel cell:

First Aid:

If contents are inhaled, move to an area with fresh air.

Contact a doctor if symptoms persist.

If contents come in contact with skin, wash

affected area with soap and warm water,

then apply skin cream.

If contents come in contact with eyes, flush open eyes

with water. Contact a doctor if irritation continues.

How to discharge gases from the canister:

(1) Separate the metering valve from the canister.

(2) Push the extended stem vertically to discharge

remaining fuel gas.

(3) After remaining fuel gas has been discharged, forcibly

push down the stem vertically to puncture the cap of

the canister, and thus discharge remaining propellant

gas. Puncturing the cap will discharge remaining

propellant gas.

Carton box, small

Storage

To Retailers:

• Flammable contents. Container under pressure.

• Store in well-ventilated area.

• Do not store above 50

°C (120°F) (e.g., exposed to direct sunlight).

• Do not display in shop windows.

• Do not store in passages, entry halls, near doors/exits or in attics.

• Do not store together with pyrotechnical goods.

• The quantity stored in sales rooms should not exceed daily sales.

• Storerooms must not occupy more than 20 m

of floor space.

• A fire extinguisher of 6 kg (class A, B, or C) must be available.

• Packages should be stacked so as not to fall to the ground.

• Do not expose to an open flame or sparks.

• Do not puncture or open the fuel cell.

• Keep out of the reach of children.

Carton box, large

Transportation

Shipment per mail is not allowed.

Transportation of small quantities for own use in

private car is allowed without shipping papers and

emergency card.

Observe the temperature limit of 50°C (120°F).

Goods must be accompanied by a transport

emergency card for road; class 2.1, UN No. 1950.

UN No.: United Nation IMDG

(International Maritime Dangerous Goods)

-9-

8. MECHANISM AND PRINCIPLE OF OPERATION

8-1. Mechanism

The Model NT 65GB is a gas nailer that drives nails into workpieces with the aid of fuel

combustion energy. The basic construction of the Model NT 65GB is the same as that of the

Model NR 90GC2. Its principle of operation is completely different from that of a pneumatic nailer,

except for the magazine section. The Model NT 65GB is equipped with a fuel cell and a battery to

output combustion energy, in addition to such electric components as electric circuits, a motor,

and electric switches.

As illustrated in Fig. 3, the Model NT 65GB can generally be divided into three sections—the

output section, head section, and handle section. The following describes the features of the

main parts.

• Output section (Housing section):

This section outputs fuel combustion energy. The piston reciprocates to drive nails in the same

manner as a pneumatic nailer. The piston reciprocates in the cylinder. There is a driving unit

under the piston. The combustion chamber is encased in a chamber and burns fuel to output

combustion energy. The combustion energy output is then applied to the top of the piston,

thereby driving the piston downward to drive nails at the driving unit The nails are fed from the

magazine unit located in the handle section.

• Head section (Cylinder head section):

This section is at the top of the combustion chamber in the output section. There is a fan to stir

fuel and fuel is fed from the fuel cell to the combustion chamber in this section. The fan is

mounted to the motor. The motor is held in the motor mount and secured to the center of the

cylinder head through the spring.

This spring absorbs shock to the motor. There is a spark plug beside the fan. The top cover at

the top of the main body covers the filter. The cell lever feeds fuel from the fuel cell to the

combustion chamber. Its rotation is supported.

• Handle section:

This section consists of a magazine unit to feed nails to the driving unit, battery holder, handle

unit, fuel cell holder, and related electrical wiring. The magazine unit features a construction

similar to that of a pneumatic nailer. There is a controller behind the magazine unit to control

electric signals. The handle unit contains a trigger and a spark switch. The electrical wiring

connects the battery, trigger switch, and fan switch. Each time the controller receives a switch

signal, the motor in the head section rotates and the spark plug discharges.

-10-

Fig. 3

Filter Cover [1A]

Motor mount

Motor

Filter Mesh [2]

Top Cover [4A]

Cylinder Head [7A]

Spark Plug (A) [5]

Motor spring

Fan [11]

Combustion

chambe

Chamber [16]

Piston [27]

Cylinder Ass'y (A)

[104A]

Housing [30A]

Piston Bumper [28]

Lock Lever [36A]

Guide Plate [38]

Pushing Lever (A) [82]

Nail Feeder (B) [91]

Trigger [71]

Spark switch

Battery [58]

ctuato

[56]

Head section

(Cylinder head section)

Output section

Handle section

-11-

8-2. Principle of Operation

(1) Before nailing

Fuel is not charged into the nailer in the

initial state. The combustion chamber is

released to the atmosphere (Fig. 4).

(2) When nailing

1) Push up Pushing Lever (A) [82]..

The nailer then starts operation in

the following order (Fig. 5).

(a)

The Pushing Lever Arm [77] on

the Chamber [16] pushes the

Trigger Stopper [75] to turn on

the fan switch. The Fan [11] in

the combustion chamber then

rotates.

(b)

The Chamber Head [14] and

the Chamber [16] surface are

sealed by the Piston Ring (B)

[17] simultaneously. Thus the

combustion chamber is cut off

from the atmosphere.

(c)

The protrusion of the Chamber

Head [14] pushes up the tip of

the Actuator [56] to rotate it.

The Actuator [56] thus pushes

the back of the fuel cell to spray

fuel into the combustion chamber.

Fig. 4

Combustion

chamber

Fan [11]

Chamber [16]

Cylinde

Ass'y (A)

[104A]

Pushing Lever (A)

[82]

Fuel cell

Trigger [71]

Piston

Ring (B) [17]

Fan [11]

Piston

Ring (B) [17]

Chamber [16]

Pushing

Lever Arm [77]

Pushing Lever (A)

[82]

ctuato

[56]

Chamber

Head [14]

Trigger

Stopper [75]

Fan switch

Fig. 5

-12-

2) Holding down the Trigger [71] makes

the spark switch turn on. The spark

plug in the combustion chamber then

discharges (Fig. 6).

The fuel thus burns and a sudden

expansion occurs. The Piston [27] is

then lowered to drive nails (Fig. 7).

When the Piston [27] passes the

hole of Cylinder Ass'y (A) [104A],

combustion gas is partially released

into the atmosphere through the

Reed Valve [50]. Because the

Reed Valve [50] is a non-return

valve, no air enters Cylinder Ass'y

(A) [104A]. When the Piston [27]

contacts the Piston Bumper [28],

the combustion of fuel is almost

completed.

(3) During return

Piston Ring (B) [17] seals the Chamber

[16] to cut off the atmosphere (Fig. 7).

Because combustion gas is partially

released into the atmosphere

through the Reed Valve [50], the

pressure at the upper portion of the

Piston [27] becomes lower than the

atmospheric pressure. The Piston [27]

is returned to its initial position by the

difference in pressure between the

upper and lower portions of the

Piston [27].

Spark

Plug (A) [5]

Combustion

chamber

Piston [27]

Hole of Cylinde

Ass'y (A)

[104A]

Piston

Bumper [28]

Spark switch

Trigger [71]

Hole of Cylinde

Ass'y (A) [104A]

Piston [27]

Fig. 6

Fig. 7

-13-

(4) Discharge and cooling

When you stop pressing Pushing

Lever (A) [82], the Chamber [16] is

placed in its initial state and the

sealing by Piston Ring (B) [17] is

released. When the Fan [11] rotates,

air passes through the Filter Mesh [2],

enters the combustion chamber, and

is then discharged outside, in order to

discharge gas and cool the

combustion chamber (Fig. 8).

Filter Mesh [2]

Piston

Ring (B)

[17]

Chamber [16]

Pushing

Lever (A) [82]

Fan [11]

Fig. 8

-14-

(5) Full sequential action mechanism

Press Pushing Lever (A) [82] against

the workpiece and move the Chamber

[16] to the uppermost position. The

nailer will then operate only when you

hold down the Trigger [71]. The nailer

will not operate if you press Pushing

Lever (A) [82] insufficiently or press it

after holding down the Trigger [71].

• When holding down the Trigger [71]

after pressing Pushing Lever (A) [82]

The convex portion of the Pushing

Lever Arm [77] pushes up the Trigger

Stopper [75] and moves when the

Chamber [16] reaches the uppermost

position.

The tip of the Trigger Stopper [75]

does not prevent the Trigger [71] from

rotating (Fig. 9). Holding down the

Trigger [71] turns on the spark switch

and drives nails.

• When pressing the Pushing Lever (A)

[82] after depressing the Trigger [71]

When depressing the Trigger [71], the

tip of the Trigger Stopper [75] prevents

the Trigger [71] from rotating. Thus the

spark switch is not turned on.

Tip of Trigger

Stopper [75]

Spark switch

Trigger [71]

Pushing

Lever (A) [82]

The convex

portion of the

Pushing Leve

Arm [77]

Chamber [16]

Trigger [71]

Spark switch

Tip of Trigger

Stopper [75]

Chamber [16]

Pushing

Lever (A) [82]

Fig. 9

Fig. 10

-15-

9. TROUBLESHOOTING GUIDE

9-1. Problems Caused by Improper Handling

The table below lists the problems that may occur. Note that improper handling causes these

problems, not any nailer abnormality. Therefore, please instruct the customers to use the nailer

properly according to the table.

Improper handling Problem Cause Corrective action

The Trigger [71] is

pressed insufficiently.

• No combustion

occurs.

• No nail is driven.

• The Piston [27] is

lowered.

• Return the Piston [27] to

the uppermost position

with a flat-blade

screwdriver.

• Press Pushing Lever (A)

[82] securely for about

0.5 second after

combustion.

Pushing Lever (A)

[82]is pressed while

the Trigger [71] is

being slightly held

down.

• No combustion

occurs.

• The spark switch is

not turned on.

• Press Pushing Lever (A)

[82] without holding down

the Trigger [71], and then

hold down the Trigger

[71].

The Battery [58] is not

set or set improperly.

• The nailer does not

start.

• No electricity is sent. • Set the Battery [58]

properly in the nailer.

The nailer is used while

the battery indicator

light is red (Fig. 11).

• Output is decreased. • The number of

revolutions of the

Fan [11] is low.

• Charge the Battery [58].

The nailer is used with

a clogged Filter Mesh

[2].

• Output is decreased.

• The nailer generates

heat.

• Discharge and

cooling are

insufficient.

• Clean the Filter Mesh [2]

(Fig. 12).

The fuel cell is not set

or set improperly.

• No combustion

occurs.

• No fuel is fed. • Set the fuel cell properly

(Fig. 13).

The metering valve of

the fuel cell is set

improperly.

• No combustion

occurs.

• No fuel is fed. • Set the metering valve of

the fuel cell properly

(Fig. 14).

Pushing Lever (A) [82]

is pressed insufficiently.

• No combustion

occurs.

• No fuel is fed.

• The switch of the Fan

[11] is not turned on.

• Press Pushing Lever (A)

[82] securely.

The fuel cell lacks fuel. • No combustion

occurs.

• No fuel is fed. • Use a new fuel cell.

Battery indicato

light

Fig. 11 Fig. 12

Filter Cover [1

]

Filter Mesh [2]

(Clean Filter Mesh

[2] with an air gun.)

Top C o ver [4

]

-16-

Insert the stem of the fuel cell into the hole on the adapter

To attach the metering valve to a fuel cell:

Fig. 13

(1) Separate the metering

valve and cap from the

gas cartridge.

(2) Press the front side of

the metering valve

forward (stem side)

and downward.

(3) Press the rear of the

metering valve

downward until it seals.

Fig. 14

Problem Possible cause Inspection method Corrective action

Fuel is not

sprayed.

• Fuel is leaking.

• There is no fuel.

• The metering valve

is not set properly.

• Press the stem five

or more times with

the fuel cell held

upright to check

whether fuel is

being sprayed.

• Set the metering valve

properly (and rotate the

valve to secure it in

place).

• Replace the metering

valve with a new one.

• Replace the fuel cell with a

new one.

• The bag in the fuel cell is

damaged.

• Fuel is not sprayed

when the fuel cell

is held upright, but

is sprayed when

the fuel cell is held

horizontally.

• Replace the fuel cell with a

new one.

• Insufficient sealing of the cup

and stem in the metering

valve.

• Check whether fuel

is leaking by

holding down the

stem.

• Replace the metering

valve with a new one.

• The nailer is left under a high

temperature condition.

The nailer is left in direct

sunlight or nails are driven

continuously. <Excessively

high concentration of gas>

• The main body is

hot due to

combustion heat.

• Allow the main body and

fuel cell to cool down.

• Replace the fuel cell with a

new one.

Fuel is

sprayed but

combustion

occurs.

• The nailer is left under a low

temperature condition.

0°C or lower temperature

• The sprayed fuel is

in a liquid state.

• Warm up the fuel cell.

Instruct the customers on

such necessary measures

as putting the fuel cell in a

pocket or wrapping it in a

thermal insulating

material.

Fuel is sprayed

but no

combustion

occurs.

• The oxygen content of air is lo

at such places as highlands at

an altitude of 1,500 meters or

more.

<Excessively high concentration

of gas>

• A large amount of

fuel is sprayed.

• Use the nailer where the

altitude is less than 1,500

meters.

Adapter [20]

Stem

Fuel cell

-17-

9-2. Troubleshooting and Corrective Action

(1) Troubleshooting and correction action for gas nailers

The mechanism used by a gas nailer to produce output is completely different from that used

by a pneumatic nailer. The table below lists the troubleshooting and correction action to take

for gas nailers.

Problem Possible cause Inspection method Corrective action

• The Piston [27] is

lowered.

• Check the position of the

Piston [27].

• Return the Piston [27] to

the uppermost position with

a flat-blade screwdriver.

• Hold down Pushing Lever

(A) [82]securely until nailing

operation is completed.

• The outside air

temperature and altitude

exceed specifications.

• Check the outside air

temperature and altitude.

• Outside air temperature

range: 0°C to 40°C

• Altitude: Less than 1,500 m

(5,000 feet)

• No fuel is fed. • Check that the fuel cell is

set properly.

• lack of fuel in the fuel cell.

• The metering valve is not

set properly to the fuel cell.

• The Actuator [56] is

deformed.

• The Adapter [20] is

damaged.

• Set the fuel cell properly

(Fig. 13).

• Replace the fuel cell.

• Set the metering valve to the

fuel cell properly (Fig. 14).

• Replace the Actuator [56].

• Replace Adapter [20].

• Pushing Lever (A) [82]

cannot be pushed up.

• Pushing Lever (A) [82] is

deformed.

• The Pushing Lever Arm [77]

is deformed.

• Piston Ring (B) [17] is

pinched.

• Replace Pushing Lever (A)

[82].

• Replace the Pushing Lever

Arm [77].

• Mount Piston Ring (B) [17]

properly.

• The battery indicator light

does not go on.

• Low voltage • Charge the battery.

No combustion

occurs.

• The motor does not

rotate.

• The Battery [58] is not set

properly.

• The Battery [58] is faulty.

• The battery indicator light

goes on in red.

• Connection failure between

Internal Wire (A) [60A] and

the Controller [95].

• Connection failure between

Internal Wire (A) [60A] and

the motor.

• Break in Internal Wire (A)

[60A].

• The fan switch is faulty.

• The Pushing Lever Arm [77]

is deformed.

• The motor is damaged.

• Set the Battery [58] properly.

• Replace the Battery [58].

• Charge the Battery [58].

• Connect properly (Fig. 15).

• Connect properly (Fig. 16).

• Replace Internal Wire (A)

[60A].

• Replace Internal Wire (A)

[60A].

• Replace the Pushing Lever

Arm [77].

• Replace the Motor Ass'y

[25B].

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Hitachi NT 65GB Technical Data And Service Manual

Brand: Hitachi

Model: NT 65GB

Category: Water heaters & boilers

Type: Technical Data And Service Manual

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Hitachi NT 65GB Technical Data And Service Manual

Hitachi NT 65GB Technical Data And Service Manual

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