Hitachi DS 18DSFL Technical Data And Service Manual

Brand: Hitachi

Model: DS 18DSFL

Category: Cordless combi drills

Type: Technical Data And Service Manual

This manual is also suitable for

DS 14DSFL

International Sales Division

The Models DS 14DSFL and DS 18DSFL are cordless driver drills equipped with an 14.4 V and 18 V

lithium-ion battery, respectively. The new Models DS 14DSFL and DS 18DSFL are low spec version of DS

14DSAL and DS 18DSAL.

Vigorous sales promotion and expanded market share are anticipated with the introduction of the new Models

DS 14DSFL and DS 18DSFL. The key features of the Models DS 14DSFL and DS 18DSFL are as follows:

(1) Improved overload durability

(2) 22-position torque adjustable clutch (Max. clutch torque: 6.0 N

•m)

(3) Equipped with safe and secure lithium-ion battery

We aim to expand our market share with the new Models DS 14DSFL and DS 18DSFL.

LIST Nos.

DS 14DSFL : H891

DS 18DSFL : H892

Sep. 2010

PRODUCT NAME

Hitachi 14.4 V Cordless Driver Drill

Model DS 14DSFL

Hitachi 18 V Cordless Driver Drill

Model DS 18DSFL

• Tightening and loosening wood screws, self-tapping screws and machine screws

• Drilling into wood, plastic, mild steel and aluminum materials

MARKETING OBJECTIVE

APPLICATIONS

SELLING POINTS

[NEW FEATURES]

Improved overload durability

(improved cooling efficiency)

22-position torque adjustable clutch

Soft-grip handle

Safe and secure lithium-ion battery

(BSL 1415, BSL 1815)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

[DS 18DSFL ]

REMARK:

• For more information about HANDLING INSTRUCTIONS, visit our website at:

http://www.hitachi-koki.com/manual_view_export/

• 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:

Model DS 14DSFL

Competitors

Symbols Utilized

Company Name Model Name

M MAKITA BDF343

Model DS 18DSFL

Competitors

Symbols Utilized

Company Name Model Name

M MAKITA BDF453

CONTENTS

Page

SELLING POINTS -------------------------------------------------------------------------------------------------------------- 1

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

1. Specifications

--------------------------------------------------------------------------------------------------------------------------------- 3

COMPARISON WITH SIMILAR PRODUCTS---------------------------------------------------------------------------- 5

1. Comparison of Specifications --------------------------------------------------------------------------------- 5

2. Comparison of Drilling and Fastening Performance per Charge ------------------------------------- 7

PRECAUTIONS ON SALES PROMOTION ------------------------------------------------------------------------------ 9

1. Safety Instructions ----------------------------------------------------------------------------------------------- 9

2. Inherent Drawbacks of Cordless Driver Drills Requiring

Particular Attention during Sales Promotion ------------------------------------------------------------- 11

REPAIR GUIDE---------------------------------------------------------------------------------------------------------------- 13

1. Precautions on Disassembly and Reassembly --------------------------------------------------------- 13

2. Precautions on Disassembly and Reassembly of the Battery Charger --------------------------- 21

STANDARD REPAIR TIME (UNIT) SCHEDULES-------------------------------------------------------------------- 22

Assembly Diagram for DS 14DSFL

Assembly Diagram for DS 18DSFL

-1-

• 1.76 N•m {18 kgf•cm} intermittent load test (14.4 V)

• 2.06 N•m {21 kgf•cm} intermittent load test (18 V)

Improved overload durability (improved cooling efficiency)

The Models DS 14DSFL and DS 18DSFL ensure durability in continuous operation, thanks to of a powerful

motor and improved air ducts.

SELLING POINTS

70 80

120 140

-2-

22-position torque adjustable clutch (Max. clutch torque: 6.0 N•m)

The 22-position torque adjustable clutch ensures fine torque adjustment for better operability.

Clutch dial position Tightening torque

1 1.0 ± 0.5 N•m {10 ± 5 kgf•cm }

4 1.7 ± 0.6 N•m {17 ± 6 kgf•cm }

10 3.1 ± 0.7 N•m {31 ± 7 kgf•cm }

13 3.8 ± 0.8 N•m {38 ± 8 kgf•cm }

19 5.3 ± 0.9 N•m {53 ± 9 kgf•cm }

22 6.0 ± 1.0 N•m {60 ± 10 kgf•cm }

* There may be some differences in operation depending on shapes of screws and the

workpieces used.

Conduct a test before actual driving.

Soft-grip handle

The handle 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.

Safe and secure lithium-ion batteries (Types BSL 1415 and BSL 1815)

The new 1.5 Ah Types BSL 1415 and BSL 1815 Lithium-ion Batteries were developed for light-duty work.

Both batteries are equipped with an overdischarge protection circuit, overload protection circuit, overheat

protection circuit and voltage monitoring circuit for each cell to prevent reduced battery service life due to

overdischarge (overuse) or overcharge (excessive charging). These protection circuits make it possible to

safely use the batteries.

Precautions on using the Types BSL 1415 and BSL 1815 Lithium-ion Batteries

The Types BSL 1415 and BSL 1815 Lithium-ion Batteries are both equipped with a protective function that

automatically stops output to prolong battery service life. The motor may stop automatically in any of cases

(1), (2) and (3) below, even if the switch is held down during operation. This is due to activation of the

protective function. The batteries are not faulty.

Protective function Source of trouble Corrective action

(1)

Overdischarge

protection circuit

Drop in battery voltage to about:

8 V/BSL 1415

10 V/BSL 1815

Charge the battery immediately.

(2)

Overload

protection circuit

Heavy-duty work

Release the switch and eliminate

the cause of the overload problem.

(3)

Overheat

protection circuit

Continuous operation

or heavy-duty work

Remove the battery from the tool

and allow it to cool down.

-3-

1. Specifications

Model

Item

DS 14DSFL

Capacity

Screw driving Machine screw----------- 6 mm (1/4")

Wood screw

------------- 6.2 mm dia. x 63 mm (#14 x 2-1/2")

Drilling Metal

------ Mild steel --- 12 mm (15/32") [Thickness 1.6 mm (1/16")]

Wood

--------------------- 30 mm (1-3/16") [Thickness 18 mm (11/16")]

Keyless chuck

(10VLRH-N)

Mount type

----------------------Screw-on (UNF 1/2" - 20)

Diameter

-------------------------0.8 to 10 mm (1/32" to 3/8")

Rotation speed

(No-load)

Low: 0 to 450 min

-1

, High: 0 to 1,250 min

-1

Torque

Slip torque ----------------------1 to 6.0 N•m (10 to 60 kgf•cm, 9 to 52 in-lbs.) [22 stages]

Max. torque

---------------------Low: 34 N•m (316 kgf•cm, 274 in-lbs.)

High: 7 N

•m (71 kgf•cm, 62 in-lbs.)

Type of motor Fan-cooled DC magnet motor

Type of switch

Trigger switch with pushing button for forward and reverse rotation changeover

(with brake)

Enclosure

Body -----------------------------Glassfiber-reinforced polyamide resin (black)

and thermoplastic elastomer (green)

Battery

--------------------------Polycarbnate resin (black)

Charger

-------------------------ABS resin (black)

Battery

(Type BSL 1415)

Sealed cylindrical lithium-ion storage battery

Nominal voltage

----------------DC 14.4 V

Nominal life

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

Nominal capacity

---------------1.5 Ah

Charger

(Model UC 18YGSL)

Overcharge protection system:

(1) Battery surface temperature detection (by thermostat or thermistor)

(2) Stop current detection

Power input: 60 W

Charging time: Approx. 40 minutes [for Type BSL 1415 Battery at 20

°C (68°F)]

Operable ambient temperature range: 0

°C to 50°C (32°F to 122°F)

The maximum allowable temperature of the Type BSL 1415 Battery is 50

°C (122°F).

Indication method of battery charging function

Net

Main body unit (including battery) ------------------------------------------- 1.5 kg (3.3 lbs.)

Charger unit (UC 18YGSL, including cord)

--------------------------------- 0.4 kg (0.9 lb.)

Weight

Gross

DS 14DSFL (2LEGK) - -------------------------------------------------------- 4.0 kg (8.7 lbs.)

DS 14DSFL (2LEGX) -

-------------------------------------------------------- 4.0 kg (8.7 lbs.)

2LEGK

• Charger (UC 18YGSL) ------------------------------------------------------------- 1

• Battery (BSL 1415) ----------------------------------------------------------------- 2

• Phillips (plus) driver bit (No. 2) --------------------------------------------------- 1

• Case ------------------------------------------------------------------------------------ 1

Standard

accessories

2LEGX

• Charger (UC 18YGSL) ------------------------------------------------------------- 1

• Battery (BSL 1415) ----------------------------------------------------------------- 2

• Torchlight (UB 18DAL)-------------------------------------------------------------- 1

• Phillips (plus) driver bit (No. 2) --------------------------------------------------- 1

• Case ------------------------------------------------------------------------------------ 1

SPECIFICATIONS

-4-

Model

Item

DS 18DSFL

Capacity

Screw driving Machine screw ------------ 6 mm (1/4")

Wood screw

--------------- 6.8 mm dia. x 50 mm (#16 x 2")

Drilling Metal

------- Mild steel --- 13 mm (1/2") [Thickness 1.6 mm (1/16")]

Wood

----------------------- 38 mm (1-1/2") [Thickness 18 mm (11/16")]

Keyless chuck

(13VLRS-N)

Mount type ----------------------Screw-on (1/2" - 20 UNF)

Diameter

-------------------------2.0 to 13 mm (5/64" to 1/2")

Rotation speed

(No-load)

Low: 0 to 450 min

-1

, High: 0 to 1,250 min

-1

Torque

Slip torque-----------------------1 to 6.0 N•m (10 to 60 kgf•cm, 9 to 52 in-lbs.) [22 stages]

Max. torque

---------------------Low: 41 N•m (418 kgf•cm, 364 in-lbs.)

High: 10 N

•m (101 kgf•cm, 88.7 in-lbs.)

Type of motor Fan-cooled DC magnet motor

Type of switch

Trigger switch with pushing button for forward and reverse rotation changeover

(with brake)

Enclosure

Body -----------------------------Glassfiber-reinforced polyamide resin (black)

and thermoplastic elastomer (green)

Battery --------------------------Polycarbonate resin (black)

Charger

-------------------------ABS resin (black)

Battery

(Type BSL 1815)

Sealed cylindrical lithium-ion storage battery

Nominal voltage

----------------DC 18 V

Nominal life

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

Nominal capacity

---------------1.5 Ah

Charger

(Model UC 18YGSL)

Overcharge protection system:

(1) Battery surface temperature detection (by thermostat or thermistor)

(2) Stop current detection

Power input: 60 W

Charging time: Approx. 40 minutes [for Type BSL 1815 Battery at 20°C (68°F)]

Operable ambient temperature range: 0

°C to 50°C (32°F to 122°F)

The maximum allowable temperature of the Type BSL 1815 Battery is 50

°C (122°F).

Indication method of battery charging function

Net

Main body unit (including battery) ------------------------------------------- 1.7 kg (3.7 lbs.)

Charger unit (UC 18YGSL, including cord)

--------------------------------- 0.4 kg (0.9 lb.)

Weight

Gross

DS 18DSFL (2LEGK) - -------------------------------------------------------- 4.2 kg (9.3 lbs.)

Standard

accessories

2LEGK

• Charger (UC 18YGSL) ------------------------------------------------------ 1

• Battery (BSL 1815) ---------------------------------------------------------- 2

• Phillips (plus) driver bit (No. 2) --------------------------------------------- 1

• Case --------------------------------------------------------------------------- 1

-5-

1. Comparison of Specifications (Superior specifications:

)

HITACHI

Maker

Model

Item

DS 14DSFL DS 14DCL

Machine screw

6 mm (1/4”) 6 mm (1/4”) 6 mm (1/4”)

Screw

driving

Wood screw

6.0 mm dia. x 75 mm

(#14 x 3”)

6.0 mm dia. x 75 mm

(#14 x 3”)

5.1 mm dia. x 63 mm

(#11 x 2-1/2”)

Mild steel

12 mm (15/32”) 12 mm (15/32”) 10 mm (3/8”)

Max. capacity

Drilling

Soft wood

30 mm (1-3/16”) 30 mm (1-3/16”) 25 mm (1”)

Low

0 to 450 min

-1

0 to 450 min

-1

0 to 400 min

-1

Rotation

speed

High

0 to 1,250 min

-1

0 to 1,250 min

-1

0 to 1,300 min

-1

1.0 to 6.0 N•m

(10 to 60 kgf•cm)

(9 to 52 in-lbs.)

1.0 to 6.0 N•m

(10 to 60 kgf•cm)

(9 to 52 in-lbs.)

Not indicated

Slip torque

22 positions 22 positions

16 positions

Max. torque

34 N•m

(347 kgf•cm)

(300 in-lbs.)

31 N•m

(316 kgf•cm)

(274 in-lbs.)

36 N•m

(367 kgf•cm)

(319 in-lbs.)

Type Double sleeve Double sleeve

Single sleeve

Drill

chuck

Capacity

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

Type

Variable speed Variable speed

Variable speed

Switch

Electric brake

Equipped Equipped

Equipped

Automatic spindle lock None None Equipped

Reversing switch

Push-button Push-button

Push-button

Handle shape

T-type T-type

T-type

Soft-grip handle

Equipped Equipped

Equipped

Belt Hook

Equipped None None

Strap

None None None

Nominal

capacity

1.5 Ah 1.5 Ah

1.5 Ah

(Actual 1.1Ah)

Nominal voltage

14.4 V (Li-ion) 14.4 V (Li-ion) 14.4 V (Li-ion)

Battery

Charging time*

40 min.

(UC 18YGSL)

60 min.

(UC 18YKL)

30 min.

(DC 18SD)

Overall length

219 mm (8-5/8”) 218 mm (8-19/32”)

192 mm (7-9/16”)

Overall height

226 mm (8-57/64”) 233 mm (9-11/64”)

226 mm (8-57/64”)

Dimensions

Overall width

80 mm (3-9/64”) 80 mm (3-9/64”)

80 mm (3-9/64”)

Weight

1.5 kg (3.3 lbs.) 1.4 kg (3.1 lbs.)

1.3 kg (2.9 lbs.)

*: Charging time varies depending on the type of charger used.

COMPARISON WITH SIMILAR PRODUCTS

-6-

(Superior specifications:

)

HITACHI

Maker

Model

Item

DS 18DSFL DS 18DCL

Machine screw

6 mm (1/4”) 6 mm (1/4”) 6 mm (1/4”)

Screw

driving

Wood screw

6.8 mm dia. x 50 mm

(#16 x 2”)

6.8 mm dia. x 50 mm

(#16 x 2”)

6.0 mm dia. x 75 mm

(#14 x 3”)

Mild steel

13 mm (1/2”) 13 mm (1/2”) 13 mm (1/2”)

Max. capacity

Drilling

Soft wood

38 mm (1-1/2”) 38 mm (1-1/2”) 36 mm (1-27/64”)

Low

0 to 450 min

-1

0 to 450 min

-1

0 to 400 min

-1

Rotation

speed

High

0 to 1,250 min

-1

0 to 1,250 min

-1

0 to 1,300 min

-1

1.0 to 6.0 N•m

(10 to 60 kgf•cm)

(9 to 52 in-lbs.)

1.0 to 6.0 N•m

(10 to 60 kgf•cm)

(9 to 52 in-lbs.)

Not indicated

Slip torque

22 positions 22 positions

16 positions

Max. torque

41 N•m

(418 kgf•cm)

(364 in-lbs.)

41 N•m

(418 kgf•cm)

(364 in-lbs.)

42 N•m

(428 kgf•cm)

(372 in-lbs.)

Type Double sleeve Double sleeve

Single sleeve

Drill

chuck

Capacity

13 mm (1/2”) 13 mm (1/2”) 13 mm (1/2”)

Type

Variable speed Variable speed

Variable speed

Switch

Electric brake

Equipped Equipped

Equipped

Automatic spindle lock None None Equipped

Reversing switch

Push-button Push-button

Push-button

Handle shape

T-type T-type

T-type

Soft-grip handle

Equipped Equipped

Equipped

Belt Hook

Equipped None None

Strap

None None None

Nominal

capacity

1.5 Ah 1.5 Ah

1.5 Ah

(Actual 1.1Ah)

Nominal voltage

18 V (Li-ion) 18 V (Li-ion) 18 V (Li-ion)

Battery

Charging time*

40 min.

(UC 18YGSL)

60 min.

(UC 18YKL)

15 min.

(DC 18RA)

Overall length

228 mm (8-31/32”) 227 mm (8-15/16”)

214 mm (8-27/64”)

Overall height

227 mm (8-15/16”) 236 mm (9-19/64”)

227 mm (8-15/16”)

Dimensions

Overall width

80 mm (3-9/64”) 80 mm (3-9/64”) 80 mm (3-9/64”)

Weight

1.7 kg (3.7 lbs.)

1.6 kg (3.5 lbs.)

*: Charging time varies depending on the type of charger used.

-7-

Wood screw

4.8 mm dia

(

3/16”

)

American pine

L40 (1-9/16”)

Wood boring

American pine

18 mm dia.

(23/32”)

T18 (23/32”)

HSS Drill bit

Mild steel

6.5 mm dia.

(1/4”)

T1.6 (1/16”)

Machine screw

6 mm (1/4”)

12 mm (15/32”)

2. Comparison of Drilling and Fastening Performance per Charge

Working Capacity

Type of Work Maker Model

0 *250 *500 *750 *1,000

0 50 100 150 200

Drilling

Speed

(sec./pc.)

DS 14DSFL

78 8.6

HITACHI

DS 14DCL 70

7.6

M 97 8.7

DS 14DSFL

2.8

HITACHI

DS 14DCL 2.9

M 4.4

DS 14DSFL

2.7

HITACHI

DS 14DCL 3.0

M 3.3

DS 14DSFL

0.6

HITACHI

DS 14DCL 0.7

0.6

[Working Capacity]

Without *: Number of holes or fasteners per charge

With *: Number of machine screws fastened per charge

The table above shows examples of test data. The batteries used in testing performance are as follows:

Model DS 14DSFL: 1.5 Ah

Model DS 14DCL: 1.5 Ah

M: 1.5 Ah

As actually measured values listed in the table above may vary depending on sharpness of the drill bit,

workpiece hardness (particularly in wood materials), moisture content of wood, charging condition, operator

skill, and other factors, this data should only be used as a comparative guide.

199

183

184

195

185

*665

*690

233

*909

-8-

Wood boring

American pine

24 mm dia.

(61/64”)

T18 (23/32”)

Wood screw

L63 (2-1/2”)

6.2 mm dia

(

1/4”

)

American pine

HSS Drill bit

Mild steel

8 mm dia.

(5/16”)

T1.6 (1/16”)

Machine screw

6 mm (1/4”)

12 mm (15/32”)

Working Capacity

Type of Work Maker Model

0 *250 *500 *750 *1,000

0 50 100 150 200

Drilling

Speed

(sec./pc.)

DS 18DSFL

69 8.87

HITACHI

DS 18DCL 68

7.67

M 75 9.99

DS 18DSFL

2.80

HITACHI

DS 18DCL 169 3.17

M 153 3.68

DS 18DSFL

132

3.74

HITACHI

DS 18DCL 134 3.75

M 103 4.58

DS 18DSFL

0.57

HITACHI

DS 18DCL 0.61

M 0.59

[Working Capacity]

Without *: Number of holes or fasteners per charge

With *: Number of machine screws fastened per charge

The table above shows examples of test data. The batteries used in testing performance are as follows:

Model DS 18DSFL: 1.5 Ah

Model DS 18DCL: 1.5 Ah

M: 1.5 Ah

As actually measured values listed in the table above may vary depending on sharpness of the drill bit,

workpiece hardness (particularly in wood materials), moisture content of wood, charging condition, operator

skill, and other factors, this data should only be used as a comparative guide.

*929

*943

*992

195

-9-

1. Safety Instructions

In the interest of promoting the safest and most efficient use of the Models DS 14DSFL and DS 18DSFL

Cordless Driver Drills 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 Caution Plate and Nameplate attached to

each tool.

A. Handling instructions

Salespersons must be thoroughly familiar with the Handling Instructions in order to give pertinent advice to

the customer. In particular, they must have a thorough understanding of the precautions on using cordless

tools that differ 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 shipment, 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 (e.g., DC outlet, fuel powered generator) will cause the charger to

overheat and burn out.

(3) Do not use any voltage-increasing equipment (e.g., transformer) between the power source and

the charger.

Using the charger with voltage higher than that indicated on the unit will result in malfunction.

(4) Conduct battery charging at an ambient temperature range of 0°C to 50°C (32°F to 122°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

temperatures below 0°C (32°F) the thermostat will not function properly, and the storage battery may be

overcharged. At temperatures above 50°C (122°F), the storage battery cannot be sufficiently charged.

The optimum temperature range is 20°C to 25°C (68°F to 77°F).

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

Charging more than three storage batteries in succession at high ambient temperature will cause the

temperature of coils on the transformer to rise, running the risk of the temperature fuse inserted inside

the transformer inadvertently melting. After charging one battery, please wait at least 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 internal electronic components against

overheating. Caution the customer not to drop or insert such foreign matter as metallic or flammable

objects into the air vents. This could cause electric shock, fire, or other serious hazards.

PRECAUTIONS ON SALES PROMOTION

-10-

(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 that 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.

(8) Disposal of the storage battery

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

tool sales outlet or authorized service center when no longer capable of being recharged or repaired. If

thrown into a fire, the batteries may explode.

B. Caution plates

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

[For the USA and Canada]

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

[For Europe]

[For the USA and Canada]

(3) The following cautions are listed on the nameplate attached to the Model UC 18YGSL charger.

[For the USA and Canada]

-11-

2. Inherent Drawbacks of Cordless Driver Drills Requiring

Particular Attention during Sales Promotion

The cordless driver drill 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, any cordless tool has certain inherent

drawbacks. Salespersons must be thoroughly familiar with these drawbacks in order to properly advise the

customer in the most efficient use of the tool.

A. Suggestions and precautions on efficient use of the tool

(1) Use the cordless driver drill for comparatively light work.

The motor output of battery driven cordless driver drills is rather low compared with conventional electric

power tools. Accordingly, they are not suitable for the continuous drilling of many holes in succession, or

for drilling into particularly hard material that imposes a heavy load. Salespersons should recommend

conventional electric power tools for such heavy work.

(2) Large-diameter holes should be drilled at low speed.

Instruct the customer that drilling large-diameter holes or performing other work that requires

particularly strong torque should be done at low speed. Because there is less torque at high speed,

attempting such work at high speed will not improve working efficiency.

(3) Do not insert a foreign object into body vent holes.

The body of this tool has vent holes for improved cooling efficiency. As a fan is built into the motor, a

foreign object inserted through a vent hole may cause failure. Please instruct customers to never insert

a foreign object into the vent holes.

(4) Use at thrust of 100 to 150 N (10 to 15 kgf, 22 to 23 lbs.)

The drilling speed of this unit does not accelerate even if the tool is pressed strongly against the

workpiece as when using a typical AC driver drill. Such operation will damage the drill bit, resulting in

not only poor working efficiency but also motor burnout.

(5) Avoid “locking” of the motor

Locking of the motor will generate an overload current that could result in motor burnout and/or rapid

battery deterioration. Salespersons should advise the customer to immediately release the switch and

stop operation if the motor becomes locked. (A jammed drill bit can be disengaged from the workpiece

material by setting the switch to reverse rotation, or by manually turning the main body of the tool.)

(6) Variation in amount of work possible per charge

Although the nominal chargeable capacity of the storage batteries used with the Models DS 14DSFL and

DS 18DSFL is 1.5 Ah, the actual capacity may vary within 10% of that value depending on ambient

temperature during use and charging, and the number of times the batteries have been recharged. It

should be noted that other factors that may affect the amount of work possible per charge are the

working conditions (e.g., ambient temperature, type and moisture content of the workpiece, sharpness

of the drill bit) and the operational skill of the user.

-12-

(7) Precautions on the use of HSS drill bits

For example, although the Model DS 18DSFL is designed for drilling capacities of 38 mm (1-1/2") in

wood, and 13 mm (1/2") in mild steel, this capability is not as efficient as conventional electric power

tools. In particular, when drilling through material with a 13 mm (1/2") drill bit, the drill tends to become

locked when the drill bit penetrates a material. For this reason, the customer should be cautioned to

reduce the thrust on the main body of the drill when drilling completely through a material to avoid

locking the tool. Repeated locking of the drill causes excessive current to flow from the battery, thereby

not only reducing the amount of work possible per charge, but also running the risk of motor burnout.

(8) Securely tighten the sleeve of the keyless chuck.

The keyless chuck may slip during operation when using a cylindrically shaped drill bit shank,

depending on the surface conditions, materials, and other factors. Please instruct customers to

retighten the keyless chuck more securely if the keyless chuck slips during operation. The holding force

of the keyless chuck increases as you increase the tightening force of the keyless chuck.

(9) Avoid continuous use.

Although the Models DS 14DSFL and DS 18DSFL can withstand continuous operation under certain

conditions, operating conditions differ depending on the workpiece material and sharpness of the drill bit

in use. Please instruct customers to avoid continuous use of the Models DS 14DSFL and DS 18DSFL,

and generally take about a 15 minute break following a single charge operation.

(10) Keep the battery out of dust.

Protect the battery from being covered with dust during operation. Protect the battery from being

covered with dust accumulated on the Models DS 14DSFL and DS 18DSFL during operation. Do not

leave the battery in a dusty area when not in use. Remove dust from the battery and store it separately

from such metallic parts as screws and nails.

B. Suggestions and precautions on efficient use of the charger and storage battery

If the Types BSL 1415 and BSL 1815 storage batteries are exposed to direct sunlight for an extended

period or if the tool has just been operated for a long time, charging may not be possible at battery

temperature above 50°C (122°F). In such case, the customer should be advised to place the battery in a

shaded area with a good airflow, and allow it to sufficiently cool down before recharging. This phenomenon

is common to all existing batteries and chargers that employ temperature-sensitive overcharge protection

devices. The cooling time required before recharging can be accomplished varies from a few minutes to

about 40 minutes, depending on the load, duration of use, and ambient temperature.

-13-

Be sure to remove the storage battery (Types BSL 1415, BSL 1815) from the main body before servicing.

Inadvertent triggering of the switch with the storage battery connected poses the danger of the motor

accidently turning.

1. Precautions on Disassembly and Reassembly

[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and exploded

assembly diagram for the Models DS 14DSFL and DS 18DSFL.

1. Removal of the Hook

Remove the Truss Hd. Screw M4 (Black) [29]. Remove the Hook [30] for easier disassembly work, which

can also be done without removing the Hook [30].

2. Removal of Housing (A).(B) Set

First, align the drill mark " " at the Clutch Dial [4] with the triangle mark at Housing (A).(B) Set [25].

Remove the nine Tapping Screw (W/Flange) D3 x 16 (Black) [26] secured to the main body.

Gently open Housing (A) and Housing (B) while holding their battery loading sections. The internal parts

can then be removed collectively as a single assembly or individually. All parts can be easily removed by

raising the Gear Box Ass’y [3]. The parts are separated into the drive unit (including the Motor [33] and

Gear Box Ass’y [3]), the power supply unit (including the DC-Speed Control Switch [40] and Controller

Terminal Set [41]), and the Pushing Button [32].

3. Removal of the Drill Chuck

(a) Turn the Motor [33] counterclockwise (as viewed from the rear) and remove it from the Rear Case [14].

Remove the Shift Knob [38] from the Shift Arm [16]. Be careful not to remove the Shift Arm [16] from the

Rear Case [14] in this operation.

(b) Attach the motor spacer (an accessory of special repair tool J-342, Code No. 324-582) to the assembly

of the Drill Chuck [2], Clutch Dial [4], Front Case [9] and Rear Case [14], then mount the assembly onto

special repair tool J-342 clamped in the vise as illustrated in Fig. 1. In this operation, confirm that the

pinion press-fitted in special repair tool J-342 and Planet Gear (A) Set [21] are properly engaged.

(d) Turn the sleeve of the Drill Chuck [2] counterclockwise (as viewed from the front) to fully open the jaws

of the Drill Chuck [2]. Turn the Special Screw (Left Hand) M6 x 23 [1] clockwise and remove it. (Note

that the special screw is left-hand threaded.)

(e) Fit the hexagonal bar wrench M10 into the Drill Chuck [2] as illustrated in Fig. 1 and remove the Drill

Chuck [2] by turning the hexagonal bar wrench counterclockwise.

REPAIR GUIDE

Disassembl

-14-

Hexagonal bar wrench

Vise

Special repair tool (J-342)

Shift Arm [16]

Drill Chuck [2]

Clutch Dial [4]

Front Case [9]

Slide Ring Gear (B) [19]

Rear Case [14]

Fig. 1

4. Disassembly of the gear unit

Remove the Shift Arm [16] from the Rear Case [14], and then turn Washer (B) [23] mounted in the Rear

Case [14] counterclockwise to remove. Take out the First Ring Gear [22], Planet Gear (A) Set [21] (3 pcs.),

Pinion (B) [20], Planet Gear (B) Set [18] (3 pcs.), Pinion (C) [17] and Slide Ring Gear (B) [19] in that order.

Then remove the Screw Set D3 x 12 [15] (4 pcs.) connecting the Front Case [9] and Rear Case [14].

Finally, remove Washer (A) [13], Planet Gear (C) Set [12] (3 pcs.), Ring Gear [11], and six Steel Ball D5

[10] from the Front Case [9] in that order. Be careful not to lose the six Steel Ball D5 [10] in this operation.

5. Disassembly of the drive unit

(a) Remove the Clutch Dial [4] from the Front Case [9].

NOTE: Do not remove the Nut [6] from the Front Case [9] in this step.

(b) Remove the Shift Knob [38] from the Shift Arm [16], remove the Screw Set D3 x 12 [15] (2 pcs.) from

the Rear Case [14], and then remove the Shift Arm [16] from the Gear Box Ass’y [3]. Do not deform the

Shift Arm [16] by applying excessive force.

and Pinion (B) [20] until you hear a click. Remove the Motor Spacer [24] from the Rear Case [14]. The

parts are now separated into the armature unit and the gear unit.

(d) Push the top of the Click Spring [5] and remove it from the Front Case [9] if it needs to be replaced.

NOTE: Do not reuse the removed Click Spring [5].

6. Disassembly of the clutch unit

(a) After pressing up the hook of the Front Case [9] with a small

flat-blade screwdriver, you can directly remove the Clutch Dial

[4] and Click Spring [5] . (See Fig. 2.)

(b) Turn the Nut [6] counterclockwise and remove it from the Front

Case [9], then remove the Spring [7] and Washer (D) [8] from

the Front Case [9].

NOTE: Do not disassemble the Front Case [9].

Fig. 2

Hook (3pcs.)

-15-

Terminal support

Controller Terminal Set [41]

Internal wire (white)

DC-Speed Control Switch [40]

Internal Wire (Red) [39]

Internal Wire (Black) [34]

Internal wire (brown)

Internal wire (red)

Motor [33]

Negative side

Positive side

Red marking

Fig. 3

7. Disassembly of the power supply unit

NOTE: Do not remove the heat sink secured to the DC-Speed Control Switch [40] with a screw.

Remove the two Machine Screw (W/Sp. Washer) M4 x 6 [28], and then separate the Motor Spacer [24]

from the Motor [33]. Use a soldering iron to disconnect the Internal Wire (Black) [34] and Internal Wire

(Red) [39] from the Motor [33], and then disconnect both from the DC-Speed Control Switch [40]. Next, use

the soldering iron to disconnect the DC-Speed Control Switch [40] and Controller Terminal Set [41] in the

same manner.

Reassembly can generally be performed by reversing the disassembly procedures. However, special

attention should be given to the following items.

1. Reassembly of the power supply unit

Perform wiring according to the wiring diagram. (See Fig. 3.) Pay attention to the connecting direction of the

internal wires and terminals.

• Solder the internal wire (white) coming from the top of the Controller Terminal Set [41] to the “B-“ terminal

of the DC-Speed Control Switch [40]. Then solder the internal wires (brown and red) coming from the top

of the Controller Terminal Set [41] to the “B+” terminal of the DC-Speed Control Switch [40] (Fig. 3).

• Solder the Internal Wire (Red) [39] to the “M1” terminal of the DC-Speed Control Switch [40] and

positive side terminal (with red marking) of the Motor [33] (Fig. 3).

• Solder the Internal Wire (Black) [34] to the “M2” terminal of the DC-Speed Control Switch [40] and

negative side terminal of the Motor [33] (Fig. 3).

Reassembl

-16-

Front Case [9]

Clutch Dial [4]

Click Spring [5]

Nut [6]

Spring [7]

Washer (D) [8]

Notch

2. Reassembly of the clutch unit

(a) Mount Washer (D) [8] and the Spring [7] onto the Front Case [9]. When mounting Washer (D) [8] onto the

Front Case [9], align the projection on the Front Case [9] with the notch of Washer (D) [8]. (See Fig. 4.)

(b) Mount the Nut [6] onto the Front Case [9]. (See Fig. 5.)

Align register mark (o) on the Nut [6] with the register mark on the Front Case [9]. Turn the Nut [6] about

1-1/2 turns clockwise so that register mark (∆) on the Nut [6] is aligned with the register mark on the

Front Case [9]. Check that the Y surface of the Nut [6] is aligned with the Z surface of the Front Case

[9].

Fig. 4

Fig. 5

-17-

Rear Case [14]

Shift Arm [16]

Steel Ball D5 [10]

Ring Gear [11]

Planet Gear (C) Set [12]

Washer (A) [13]

Screw Set D3 x 12 [15]

Pinion (C) [17]

Planet Gear (B) Set [18]

Slide Ring Gear (B) [19]

Pinion (B) [20]

Planet Gear (A) Set [21]

First Ring Gear [22]

Washer (B) [23]

Groove

Fig. 7

the Front Case [9]. Then mount the Clutch Dial [4] to the Nut [6] by engaging the wider projection of the

Nut [6] with the wider recess of the Clutch Dial [4]. (The wider recess of the Clutch Dial [4] is positioned

at "5" when viewed from outside.) Be sure to fit the hook of the Front Case [9] into the hole in the Clutch

Dial [4]. (See Fig. 6.)

NOTE: Do not push the Clutch Dial [4] when assembling. Otherwise, the click spring may become

deformed and fail to work properly.

3. Reassembly of the gear unit

(a) Apply grease (Hitachi Motor Grease No. 29, Code No. 930035) to the meshing parts of the gear.

(b) Install the parts in series from the six Steel Ball D5 [10] to Washer (B) [23] as shown in Fig. 7.

Fig. 6

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Hitachi DS 18DSFL Technical Data And Service Manual

Brand: Hitachi

Model: DS 18DSFL

Category: Cordless combi drills

Type: Technical Data And Service Manual

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DS 14DSFL

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Hitachi DS 18DSFL Technical Data And Service Manual

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Hitachi DS 18DSFL Technical Data And Service Manual

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