Hitachi CJ 18DMR Technical Data And Service Manual

Brand: Hitachi

Model: CJ 18DMR

Type: Technical Data And Service Manual

This manual is also suitable for

• Cutting or cutting out shapes in various types of wood workpieces

• Cutting various types of metals such as mild steel, aluminum and copper

• Cutting various types of synthetic resin materials such as bakelite and vinyl chloride

• Cutting various decorative sheets and thin and soft construction materials

• Cutting stainless steel sheets

PRODUCT NAME

Hitachi 14.4 V Cordless Jig Saw

Model CJ 14DL, CJ 14DMR

Hitachi 18 V Cordless Jig Saw

Model CJ 18DL, CJ 18DMR

[ NEW FEATURES ]

Highest cutting capacity in the class

Lightest in the class

Equipped with the new lithium-ion battery

Tool-less blade changing system

LED lighting system

Powerful dust blowing

4-stage orbital action

Soft grip handle

The new Models CJ 14DL and CJ 18DL are cordless jig saws equipped with the 14.4-V/18-V lithium-ion

batteries. The new Models CJ 14DMR and CJ 18DMR are cordless jig saws equipped with the 14.4-V/18-V

nicad batteries. The key features of the Models CJ 14DL, CJ 18DL, CJ 14DMR and CJ 18DMR are as follows:

(1) Highest cutting capacity in the class thanks to the high-performance motor

(2) Compact and lightweight

We aim to expand our market share with the new Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR.

LIST Nos.

CJ 14DL: G880,

CJ 14DMR: G881,

CJ 18DL: G882,

CJ 18DMR: G883

Jul. 2007

MARKETING OBJECTIVE

APPLICATIONS

SELLING POINTS

International Sales Division

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

REMARK:

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

place of company name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows:

Competitors

Symbols Utilized

Company Name Model Name

B-1 GST14.4V

B-2

BOSCH

GST18V

C-1 BJV140

C-2

MAKITA

BJV180

CONTENTS

Page

SELLING POINT DESCRIPTIONS-----------------------------------------------------------------------------------------1

SPECIFICATIONS --------------------------------------------------------------------------------------------------------------3

1. Specifications -----------------------------------------------------------------------------------------------------3

2. Optional accessories --------------------------------------------------------------------------------------------7

COMPARISONS WITH SIMILAR PRODUCTS--------------------------------------------------------------------------9

1. Specification comparisons--------------------------------------------------------------------------------------9

2. Cutting number comparisons per charge-----------------------------------------------------------------10

ORBITAL MECHANISM AND BLADE-----------------------------------------------------------------------------------11

1. Blade movement -----------------------------------------------------------------------------------------------11

2. Orbital position selection -------------------------------------------------------------------------------------11

3. Blades-------------------------------------------------------------------------------------------------------------12

PRECAUTIONS IN SALES PROMOTION------------------------------------------------------------------------------13

1. Safety instructions ---------------------------------------------------------------------------------------------13

2. Precautions requiring particular attention during sales promotion ---------------------------------15

REPAIR GUIDE----------------------------------------------------------------------------------------------------------------16

1. Precautions in disassembly and reassembly------------------------------------------------------------16

2. Precautions in disassembly and reassembly of battery charger------------------------------------24

STANDARD REPAIR TIME (UNIT) SCHEDULES--------------------------------------------------------------------25

Assembly diagram for CJ 14DL

Assembly diagram for CJ 14DMR

Assembly diagram for CJ 18DL

Assembly diagram for CJ 18DMR

-1-

*: Based on our own research

Highest cutting capacity in the class*

The number of wood cutting operations per battery charge by the Models CJ 14DL and CJ 18DL is 1.3

times greater than C-1 and C-2 thanks to the efficient transmission of the cutting energy. For details, refer

to “Cutting number comparisions per charge” on page 10.

Lightest in the class

The Models CJ 14DL, CJ 18DL, CJ 14DMR and CJ 18DMR are lightest in weight in the class.

Equipped with the new lithium-ion battery

Each of the Types BCL 1430 and EBM 1830 lithium-ion batteries is equipped with the overdischarge

protection circuit, overload protection circuit, and voltage monitoring circuit for each cell to prevent

reduction of the battery life due to overdischarge (overuse) or overcharge (excessive charging) of the

battery. The number of charging/discharging is about 1,500.

Precautions for use of the Types BCL 1430 and EBM 1830 lithium-ion batteries

Each of the Types BCL 1430 and EBM 1830 lithium-ion batteries is equipped with a protective function that

automatically stops output to extend the battery life. The motor may stop automatically in either of the

following case 1 or 2 even if the switch is depressed continuously during operation. This is because the

protective function is activated. The battery is not faulty.

1 The motor may stop automatically when the remaining battery level is low (when the battery voltage is

decreased to about 8 V (Type BCL 1430)/when decreased to about 12 V (Type EBM 1830)). Charge the

battery immediately in such case.

2 The motor may stop if the Model CJ 14DL/CJ 18DL is overloaded. In such case, release the switch and

eliminate the cause of the overload problem. Then the Model CJ 14DL/CJ 18DL is operable.

Tool-less blade changing system

The blade can be easily changed by opening/closing the lever. Usable blade is only the BOSCH's blade

whose thickness at the attaching portion is 1.5 mm or less or an equivalent blade having the same shape.

1) Open the lever fully. (Fig. )

2) Detach the blade from the blade holder.

3) Attach the new blade in the blade holder by pushing as far

as it will go. (Fig.

)

4) Close the lever. (Fig. )

SELLING POINT DESCRIPTIONS

Maker HITACHI

Model CJ 14DL/CJ 14DMR/CJ 18DL/CJ 18DMR

B-1 B-2 C-1 C-2

Weight 2.3 kg / 2.5 kg / 2.4 kg / 2.7 kg 2.9 kg 3.2 kg 2.7 kg 2.8 kg

Lever

Blade holder

Blade

-2-

LED lighting system

Each of the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR is equipped with an LED light for

illuminating the blade. To turn on the light, pull the trigger. Release the trigger to turn off.

Powerful dust blowing

Each of the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR is equipped with a dust blower

mechanism that blows off dust by the air from the motor cooling fan.

4-stage orbital action

Each of the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR is equipped with the orbital mechanism

that allows the blade to move up and down and forward and backward. This mechanism makes the blade

dig well into wood and other soft materials and also discharges cutting chips well to achieve speedy cutting.

For details, refer to “Blade movement” on page 11.

Soft grip handle

The handle of the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR is widely covered with soft-touch

elastomer (rubber-like soft resin). It is slip-resistant and securely fits in the palm of a hand even if the

gripping hand sweats.

-3-

1. Specifications

Model

CJ 14DL

Capacity

Max. cutting thickness Wood 135 mm (5-5/16”)

Mild steel 10 mm (3/8”)

No-load speed

0 to 2,400 min

-1

Length of stroke

26 mm (1”)

Min. cutting radius

25 mm (1”)

Type of motor

DC magnet motor

Type of switch

Trigger switch with rotation selector and brake (with ON-OFF lock)

Max. cutting angle

45° (right and left)

LED light

White LED

Enclosure

Housing---------Glassfiber reinforced polycarbonate resin and elastomer

Gear holder----Aluminum alloy die casting

Battery ----------Glassfiber reinforced polycarbonate resin (black)

Charger---------ABS resin

Battery

(Type: BCL 1430)

Sealed cylindrical lithium-ion storage battery

Nominal voltage ------ DC 14.4 V

Nominal life ------------ Charging/discharging: Approx. 1,500 times

Nominal capacity ---- 3.0 Ah

Charger

(Model UC 18YRL)

Overcharge protection system:

(1) Battery voltage detection (- V system)

Battery temperature detection (dT/dt system) for Ni-MH and SUPER Ni-MH

batteries

(2) Battery surface temperature detection (thermistor)

(3) 120-minute timer

(4) Stop current detection (Li-ion batteries)

Power input: 95 W

Charging time: Approx. 45 minutes [for Type BCL 1430 battery at 20°C (68°F)]

Operable ambient temperature range: 0°C to 40°C (32°F to 104°F)

The maximum allowable temperature of the Type BCL 1430 battery

is 50°C (122°F).

Indication method of battery charging function

NOTE: The Model UC 18YRL cools the overheated battery by the cooling fan during the standby mode.

Net

Main body unit (including battery) ------------------------------------2.3 kg (5.1 lbs.)

Charger unit (UC 18YRL, including cord) ---------------------------0.6 kg (1.3 lbs.)

Weight

Gross

CJ 14DL (2MRK) --------------------------------------------------------- 5.7 kg (12.5 lbs.)

CJ 14DL (NN) -------------------------------------------------------------2.1 kg (4.6 lbs.)

(2LRK)

Charger (UC 18YRL) -----------------------------------------------------------------------1

Battery (BCL 1430) --------------------------------------------------------------------------2

Blade (No. 41) --------------------------------------------------------------------------------1

Splinter guard ---------------------------------------------------------------------------------1

Chip cover--------------------------------------------------------------------------------------1

Plastic case------------------------------------------------------------------------------------1

Standard

accessories

(NN) Without charger, plastic case and battery

SPECIFICATIONS

-4-

Model

CJ 18DL

Capacity

Max. cutting thickness Wood 135 mm (5-5/16”)

Mild steel 10 mm (3/8”)

No-load speed

0 to 2,400 min

-1

Length of stroke

26 mm (1”)

Min. cutting radius

25 mm (1”)

Type of motor

DC magnet motor

Type of switch

Trigger switch with rotation selector and brake (with ON-OFF lock)

Max. cutting angle

45° (right and left)

LED light

White LED

Enclosure

Housing---------Glassfiber reinforced polycarbonate resin and elastomer

Gear holder----Aluminum alloy die casting

Battery ----------Glassfiber reinforced polycarbonate resin (black)

Charger---------ABS resin

Battery

(Type: EBM 1830)

Sealed cylindrical lithium-ion storage battery

Nominal voltage ------ DC 18 V

Nominal life ------------ Charging/discharging: Approx. 1,500 times

Nominal capacity ---- 3.0 Ah

Charger

(Model UC 18YRL)

Overcharge protection system:

(1) Battery voltage detection (- V system)

Battery temperature detection (dT/dt system) for Ni-MH and SUPER Ni-MH

batteries

(2) Battery surface temperature detection (thermistor)

(3) 120-minute timer

(4) Stop current detection (Li-ion batteries)

Power input: 95 W

Charging time: Approx. 45 minutes [for Type EBM 1830 battery at 20°C (68°F)]

Operable ambient temperature range: 0°C to 40°C (32°F to 104°F)

The maximum allowable temperature of the Type EBM 1830 battery

is 50°C (122°F).

Indication method of battery charging function

NOTE: The Model UC 18YRL cools the overheated battery by the cooling fan during the standby mode.

Net

Main body unit (including battery) ------------------------------------2.4 kg (5.8 lbs.)

Charger unit (UC 18YRL, including cord) ---------------------------0.6 kg (1.3 lbs.)

Weight

Gross

CJ 18DL (2MRK) --------------------------------------------------------- 5.9 kg (13.0 lbs.)

CJ 18DL (NN) -------------------------------------------------------------2.1 kg (4.6 lbs.)

(2MRK)

Charger (UC 18YRL) -----------------------------------------------------------------------1

Battery (EBM 1830) -------------------------------------------------------------------------2

Blade (No. 41) --------------------------------------------------------------------------------1

Splinter guard ---------------------------------------------------------------------------------1

Chip cover--------------------------------------------------------------------------------------1

Plastic case------------------------------------------------------------------------------------1

Standard

accessories

(NN) Without charger, plastic case and battery

-5-

Model

CJ 14DMR

Capacity

Max. cutting thickness Wood 135 mm (5-5/16”)

Mild steel 10 mm (3/8”)

No-load speed

0 to 2,400 min

-1

Length of stroke

26 mm (1”)

Min. cutting radius

25 mm (1”)

Type of motor

DC magnet motor

Type of switch

Trigger switch with rotation selector and brake (with ON-OFF lock)

Max. cutting angle

45° (right and left)

LED light

White LED

Enclosure

Housing---------Glassfiber reinforced polycarbonate resin and elastomer

Gear holder----Aluminum alloy die casting

Battery ----------Glassfiber reinforced polycarbonate resin (black)

Charger---------ABS resin

Battery

(Type: EB 14B)

Sealed cylindrical lithium-ion storage battery

Nominal voltage ------ DC 14.4 V

Nominal life ------------ Charging/discharging: Approx. 1,000 times

Nominal capacity ---- 2.0 Ah

Charger

(Model UC 18YG)

Overcharge protection system:

A thermostat monitors the surface temperature of the battery and, on detecting

the temperature rise which occurs on completion of charging, automatically

turns off the unit to prevent the battery from overcharge.

Power input: 70 W

Indication method: Pilot lamp indicator of battery charging

Function: On------------------------------------------------------------During charging

Off -----------------------------------------------------------Charging completed

Net

Main body unit (including battery) ------------------------------------2.5 kg (5.5 lbs.)

Charger unit (UC 18YG, including cord) ----------------------------0.6 kg (1.3 lbs.)

Weight

Gross

CJ 14DMR (2BGK) ------------------------------------------------------- 6.3 kg (13.9 lbs.)

CJ 14DMR (NN) ----------------------------------------------------------2.1 kg (4.6 lbs.)

(2BGK)

Charger (UC 18YG) -------------------------------------------------------------------------1

Battery (EB 14B) -----------------------------------------------------------------------------2

Blade (No. 41) --------------------------------------------------------------------------------1

Splinter guard ---------------------------------------------------------------------------------1

Chip cover--------------------------------------------------------------------------------------1

Plastic case------------------------------------------------------------------------------------1

Standard

accessories

(NN) Without charger, plastic case and battery

-6-

Model

CJ 18DMR

Capacity

Max. cutting thickness Wood 135 mm (5-5/16”)

Mild steel 10 mm (3/8”)

No-load speed

0 to 2,400 min

-1

Length of stroke

26 mm (1”)

Min. cutting radius

25 mm (1”)

Type of motor

DC magnet motor

Type of switch

Trigger switch with rotation selector and brake (with ON-OFF lock)

Max. cutting angle

45° (right and left)

LED light

White LED

Enclosure

Housing---------Glassfiber reinforced polycarbonate resin and elastomer

Gear holder----Aluminum alloy die casting

Battery ----------Glassfiber reinforced polycarbonate resin (black)

Charger---------ABS resin

Battery

(Type: EB 1820L)

Sealed cylindrical lithium-ion storage battery

Nominal voltage ------ DC 18 V

Nomina llife ------------ Charging/discharging: Approx. 1,000 times

Nominal capacity ---- 2.0 Ah

Charger

(Model UC 18YG)

Overcharge protection system:

A thermostat monitors the surface temperature of the battery and, on detecting

the temperature rise which occurs on completion of charging, automatically

turns off the unit to prevent the battery from overcharge.

Power input: 70 W

Indication method: Pilot lamp indicator of battery charging

Function: On------------------------------------------------------------During charging

Off -----------------------------------------------------------Charging completed

Net

Main body unit (including battery) ------------------------------------2.7 kg (5.9 lbs.)

Charger unit (UC 18YG, including cord) ----------------------------0.6 kg (1.3 lbs.)

Weight

Gross

CJ 18DMR (2BGK) ------------------------------------------------------- 6.6 kg (14.5 lbs.)

CJ 18DMR (NN) ----------------------------------------------------------2.1 kg (4.6 lbs.)

(2BGK)

Charger (UC 18YG) -------------------------------------------------------------------------1

Battery (EB 1820L) --------------------------------------------------------------------------2

Blade (No. 41) --------------------------------------------------------------------------------1

Splinter guard ---------------------------------------------------------------------------------1

Chip cover--------------------------------------------------------------------------------------1

Plastic case------------------------------------------------------------------------------------1

Standard

accessories

(NN) Without charger, plastic case and battery

-7-

2. Optional accessories

(1) Blades

NOTE: The standard blade No. 41 and the optional blade No. 21 are the same in shape.

(2) Guide

Code No.

321593

(3) Sub base (A) (steel)

Code No.

321992

(4) Sub base (B) (resin)

Code No.

321993

Blade shape Application Blade No. Pitch Code No. Per pkg.

-8-

(5) Dust collector

Code No.

321591

-9-

(Superior specifications:

)

1. Specification comparisons

Maker HITACHI

Model name

CJ 14DL

/ CJ 18DL

CJ 14DMR

/ CJ 18DMR

B-1 / B-2 C-1 / C-2

Wood 135 mm (5-5/16”)

65 mm (2-9/16”)

/ 68 mm (2-11/16”)

135 mm (5-5/16”)

Cutting

capacity

Mild steel 10 mm (3/8”) 10 mm (3/8”) 10 mm (3/8”)

No-load speed 0 to 2,400 min

-1

0 to 2,100 min

-1

0 to 2,600 min

-1

Min. cutting radius 25 mm (1”) Not indicated Not indicated

Length of stroke 26 mm (1”) 26 mm (1”) 26 mm (1”)

Max. cutting angle

45° (right and left) 45° (right and left) 45° (right and left)

LED light

White LED None White LED

Tool-less blade atachment

Equipped Equipped Equipped

Soft grip handle Equipped Equipped Equipped

Type Li-ion Ni-cd Ni-MH Li-ion

Nominal

capacity

3.0 Ah 2.0 Ah 2.6 Ah 3.0 Ah

Nominal

voltage

14.4 V/18 V 14.4 V/18 V 14.4 V/18 V 14.4 V/18 V

Protection

circuit

Equipped None None Not indicated

Battery

Charging

time

45 min. 50 min. 60 min. 22 min.

Length (A) 274 mm (10-25/32”)

275 mm

(10-13/16”)

255 mm (10”)

/257 mm (10-1/8”)

Height (B) 213 mm (8-3/8”)

215 mm

(8-15/32”)

208 mm

(8-3/16”)

Dimensions

Width (C) 76 mm (2-63/64”)

84 mm

(3-5/16”)

73 mm

(2-7/8”)

Weight

2.3 kg (5.1 lbs.)

/2.4 kg (5.8 lbs.)

2.5 kg (5.5 lbs.)

/2.7 kg (5.9 lbs.)

2.9 kg (6.4 lbs.)

/3.2 kg (7.0 lbs.)

2.7 kg (5.9 lbs.)

/2.8 kg (6.1 lbs.)

: Charging time may vary depending on the type of charger to be used.

COMPARISONS WITH SIMILAR PRODUCTSCOMPARISONS WITH SIMILAR PRODUCTS

-10-

2. Cutting number comparisons per charge

The number of cutting operations per battery charge may vary widely depending on hardness of wood or

mild steel, sharpness of the blade and other factors. Use the test results shown below for reference

purposes only.

Material

Maker Model

Number of cutting operations per charge

CJ 18DL

CJ 14DL

CJ 18DMR

HITACHI

CJ 14DMR

C-2

C-1

B-2

Wood

(24 mm thick

x 330 mm)

B-1

CJ 18DL

CJ 14DL

CJ 18DMR

HITACHI

CJ 14DMR

C-2

C-1

B-2

Mild steel

(2 mm thick

x 100 mm)

B-1

20 40 60 80 100 120

127

102

-11-

1. Blade movement

In the Models CJ 14DL, CJ 18DL, CJ 14DMR and CJ 18DMR, the orbital mechanism moves the blade up-

and-down and forward-and-backward. The amount of fore-and-aft blade movement can be adjusted just by

turning the change knob to any of the four settings. The following table shows the modeled orbits of blade

movement at each orbital position (change knob position).

2. Orbital position selection

Selection of the most appropriate orbital position for each cutting job is essential to achieve the best

efficiency for cutting. However, as the best orbital position depends on such factors as hardness and

thickness of the workpiece, desired finish of the cut surface and so on, it is not practical to set a single,

simple standard for best orbital position selection. Table 2 can be used as a general guide for appropriate

orbital position selection based on various factors.

Table 2 General guide for appropriate orbital position selection

ORBITAL MECHANISM AND BLADE

-12-

3. Blades

Proper blade selection is very important to obtain the maximum performance of these models. The table

below, based on type and thickness of the material to be cut, can be used as a handy reference in selecting

the optimum blade.

NOTE :

The minimum cutting radius of No. 1 (Long), No. 1 (Super long), No. 21, No. 22 and No. 41 blades is 100

mm.

-13-

1. Safety instructions

In the interest of promoting the safest and most efficient use of the Models CJ 14DL, CJ 14DMR, CJ 18DL

and CJ 18DMR Cordless Jig Saws by all of our customers, it is very important that at the time of sale, the

salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the

Handling Instructions, and fully understands the meaning of the precautions listed on the Caution Plate and

Name Plate attached to each tool.

A. Handling instructions

Salespersons must be thoroughly familiar with the contents of the Handling Instructions in order to give

pertinent advice to the customer. In particular, they must have a thorough understanding of the precautions

for use of the cordless tools which are different from those of ordinary electric power tools.

(1) Before use, ensure that the unit is fully charged.

New units are not fully charged. Even if the units were fully charged at the factory, long periods of

inactivity, such as during shipping, cause the storage battery to lose its charge. Customers must be

instructed to fully charge the unit prior to use.

(2) Connect the charger to an AC power outlet only.

Use of any other power source (DC outlet, fuel powered generator, etc.) will cause the charger to

overheat and burn out.

(3) Do not use any voltage increasing equipment (transformer etc.) between the power source and

the charger.

If the charger is used with voltage higher than that indicated on the unit, it will not function properly.

(4) Conduct battery charging at an ambient temperature range of 0°C - 40°C (32°F - 104°F).

Special temperature sensitive devices are employed in the charger to permit rapid charging. Ensure that

customers are instructed to use the charger at the indicated ambient temperature range. At temperature

under 0°C (32°F) the thermostat will not function properly, and the storage battery may be overcharged.

At temperature over 40°C (104°F), the storage battery cannot be sufficiently charged. The optimum

temperature range is 20°C - 25°C (68°F - 77°F).

(5) The battery charger should not be used continuously.

At high ambient temperature, if over three storage batteries are charged in succession, the temperature

of the coils on the transformer will rise and there is a chance that the temperature fuse inserted in the

interior of the transformer will inadvertently melt. After charging one battery, please wait about 15

minutes before charging the next battery.

(6) Do not insert foreign objects into the air vents on the charger.

The charger case is equipped with air vents to protect the internal electronic components from

overheating. Caution the customer not to allow foreign materials, such as metallic or flammable objects,

to be dropped or inserted into the air vents. This could cause electrical shock, fire, or other serious

hazards.

(7) Do not attempt to disassemble the storage battery or the charger.

Special devices, such as a thermostat, are built into the storage battery and charger to permit rapid

charging. Incorrect parts replacement and/or wiring will cause malfunctions which could result in fire or

other hazards. Instruct the customer to bring these units to an authorized service center in the event

repair or replacement is necessary.

PRECAUTIONS IN SALES PROMOTION

-14-

(8) Disposal of the storage batteries

Ensure that all customers understand that storage batteries should be returned to the Hitachi power tool

sales outlet or the authorized service center when they are no longer capable of being recharged or

repaired. If thrown into a fire, the battery may explode, or, if discarded indiscriminately, leakage of the

cadmium compound contained in the battery may cause environmental pollution.

B. Caution plate

(1) The following cautions are listed on the name plate attached to the main body of each tool.

[ For the U.S.A. and Canada ]

(2) The following cautions are listed on the name plate attached to each storage battery.

[ For Europe ]

[ For the U.S.A. and Canada ]

(3) The following cautions are listed on the name plate attached to the Model UC 18YRL or UC 18YG

Charger.

-15-

2. Precautions requiring particular attention during sales promotion

The cordless jig saw offers many advantages: it can be used in places where no power source is available,

the absence of a cord allows easy use, etc. However, in comparison with conventional AC type jig saws,

there are certain precautions which require particular attention. Salespersons must be thoroughly familiar

with the following points to properly advise the customer in the most efficient use of the tool.

A. Suggestions and precautions for the efficient use of the tool

(1) Appropriate cutting capacity of the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR

The Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR are not capable of cutting several dozens of

cutting like a conventional AC type jig saw because they are cordless jig saws powered by a battery. If

the customer wishes to use the tool to cut many cutting in succession, please recommend that a spare

battery should be kept available for use.

(2) Variation in amount of work possible per charge

Although the nominal capacity of the storage batteries used with the Models CJ 14DL and CJ 18DL is

3.0 Ah and the Models CJ 14DMR and CJ 18DMR is 2.0 Ah, the actual capacity may vary within 10% of

that value depending on the ambient temperature during use and recharging, and the number of times

the batteries have been recharged. It should also be noted that other factors which may have a bearing

on the amount of work possible per charge are the working conditions (ambient temperature, type and

moisture content of the workpieces, sharpness of the drill bits, etc.) and the operational skill of the user.

-16-

Removal of the lever

Lever Spring [21]

Lever Bolt [23]

Lever [22]

Be sure to remove the storage batteries from the main body before servicing. Inadvertent triggering of the

switch with the storage battery connected will result in danger of accidental turning of the motor.

1.Precautions in disassembly and reassembly

The [Bold] numbres in the description below correspond to the item numbers in the Parts List and the

exploded assembly diagram for the Models CJ 14DL, CJ 14DMR, CJ 18DL and CJ 18DMR.

1. Removal of the base

Loosen the Hex. Socket Hd. Bolt M5 x 14 [53] and

remove the Gear Holder [38] together with the Base

Locker [52].

2. Removal of the lever

Loosen the Lever Bolt [23], and remove the Lever

[22] and the Lever Spring [21].

REPAIR GUIDE

Disassembl

Removal of the base

Gear Holder [38]

Base Locker [52]

Hex. Socket Hd.Bolt

M5 x 14 [53]

Base [51]

-17-

3. Disassembly of the housing

(1) Remove the Guard Bar [8].

(2) Loosen the eight Tapping Screws (W/Flange) D4 x 20 (Black) [6] and open the housing.

(3) Remove the Plate Spring [28] from the housing.

(4) Loosen the Tapping Screw (W/Sp. Washer) D3 x 8 [10] and remove the Fence [9] from the housing.

(5) The other housing can then be removed from the main body. After disassembly, remove the two

O-rings (P-6) [5] from both sides of the housing.

4. Removal of the plunger and the blade holder

(1) Pull out the Pin D6 [27] from the Gear Holder [38], and remove the Plunger [30] and Plunger Holder (A)

[29].

(2) Loosen the Seal Lock Hex. Socket Hd. Bolt M3 x 6 [25] and the Seal Lock Hex. Socket Hd. Bolt M3 x 8

[24], and remove the Blade Holder [26].

(3) Pull out the Packing Cover [41], Packing [42] and Plunger Holder (B) [40] from the Plunger [30].

Disassembly of the housing

Tapping Screw (W/Sp. Washer) D3 x 8 [10]

Fence [9]

Tapping Screw (W/Flange)

D4 x 20 (Black) [6]

O-ring (P-6) [5]

Plate Spring [28]

Housing (A).(B) set [1]

Guard Bar [8]

Removal of the plunger and the blade holder

Plunger Holder (A) [29]

Pin D6 [27]

Seal Lock Hex. Socket Hd. Bolt

M3 x 8 [24]

Seal Lock Hex. Socket Hd. Bolt

M3 x 6 [25]

Blade Holder [26]

Packing Cover [41]

Plunger Holder (B) [40]

Packing [42]

Plunger [30]

Gear Holder [38]

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Model: CJ 18DMR

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