Hitachi WH 14DSL Manual

CORDLESS IMPACT DRIVER
WH 14DSL
CORDLESS IMPACT WRENCH
WR 14DSL
WH 14DSL
WR 14DSL
Feb. 2008
LIST Nos. WH 14DSL: G894
WR 14DSL: G895
MODELS
WH 14DSL
WR 14DSL
W

REMARK:
Throughout this TECHNICAL DATAAND 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:
WH 14DSL
Competitors
Symbols Utilized Company Name Model Name
P MAKITA BTD130F
WR 14DSL
Competitors
Symbols Utilized Company Name Model Name
None --

CONTENTS
Page
1. PRODUCT NAME ---------------------------------------------------------------------------------------------------------- 1
2. MARKETING OBJECTIVE ---------------------------------------------------------------------------------------------- 1
3. APPLICATIONS ------------------------------------------------------------------------------------------------------------ 1
4. STANDARD EQUIPMENT ----------------------------------------------------------------------------------------------- 1
5. SELLING POINTS --------------------------------------------------------------------------------------------------------- 2
5-1. Selling Point Descriptions ---------------------------------------------------------------------------------------- 4
6. SPECIFICATIONS --------------------------------------------------------------------------------------------------------- 8
6-1. Specifications ---------------------------------------------------------------------------------------------------- 8
6-2. Optional Accessories ------------------------------------------------------------------------------------------- 9
7. COMPARISONS WITH SIMILAR PRODUCTS ---------------------------------------------------------------------12
7-1. Specification Comparisons (Cordless impact driver) ---------------------------------------------------12
7-2. Specification Comparisons (Cordless impact wrench) -------------------------------------------------13
7-3. Tightening Torque------------------------------------------------------------------------------------------------14
7-4. Tightening Time --------------------------------------------------------------------------------------------------18
7-5. Number of Screws or Bolts Driven --------------------------------------------------------------------------19
8. PRECAUTIONS IN SALES PROMOTION --------------------------------------------------------------------------20
8-1. Safety Instructions -------------------------------------------------------------------------------------------------20
8-2. Tightening Torque Inspection Prior to Operation ----------------------------------------------------------23
8-3. Tightening Torque Variation--------------------------------------------------------------------------------------23
8-4. Suggestions and Precautions for the Efficient Use of the Charger ----------------------------------24
9. OTHER PRECAUTIONS--------------------------------------------------------------------------------------------------25
10. REPAIR GUIDE------------------------------------------------------------------------------------------------------------26
10-1. Precautions in Disassembly and Reassembly------------------------------------------------------------26
10-2. Precautions in Disassembly and Reassembly of Battery Charger-----------------------------------41
11. STANDARD REPAIR TIME (UNIT) SCHEDULES ---------------------------------------------------------------42
Assembly Diagram for WH 14DSL
Assembly Diagram for WR 14DSL

-1-
1. PRODUCT NAME
Hitachi Cordless Impact Driver, Model WH 14DSL
Hitachi Cordless Impact Wrench, Model WR 14DSL
2. MARKETING OBJECTIVE
The new Models WH 14DSL and WR 14DSL are the compact-type cordless impact driver/wrench
developed to reinforce our 14.4-V product lines and also to meet the market demands. These
new models have powerful tightening torque thanks to the optimized impact timing, hook and
protector (standard accessories). In addition, each of these new models is equipped with a slide-
type lithium-ion battery to materialize the compact body, built-in LED light, and convenient
remaining battery indicator. Thus the Models WH 14DSL and WR 14DSL are excellent in
performance, user-friendliness and operability.
3. APPLICATIONS
• Tightening/loosening of small screws, tapping screws, wood screws, bolts, nuts, etc.
• Drilling into wood and various other materials (with use of optional accessory drill chuck
adapter).
[Applicable Markets]
• Wood-product assembly: Tightening/loosening of wood screws
• Construction industry: Assembly of scaffolding, roofing, aluminum sashes, fencing, etc.; removal
of plastic cones from concrete forms, mounting/removal of form ties; drilling into the wood
frames of concrete forms, etc.
• Manufacturing industry: Assembly work for automobiles, rolling stock, shipbuilding, agricultural
machinery and tools, industrial machines, steel furniture, etc.
• Utility industry: Assembly and installation of electric equipment, plumbing facilities, air
conditioning (duct assembly etc.), sanitary fixtures and various other facilities.
• Service industry: General repair work; installation of advertising aids, automobile repair,
assembly of garages, carports and storage sheds, etc.
• Various other assembly, construction or repair facilities
4. STANDARD EQUIPMENT
Models WH 14DSL/WR 14DSL
(1) 2LSCK specification: Two BSL 1430 batteries (Li-ion, capacity 3.0 Ah), battery cover,
UC 18YRSL charger and case
(2) NN specification: Only the main body

-2-
5. SELLING POINTS
Powerful tightening torque
Equipped with lightweight and high-capacity (3.0 Ah) lithium-ion battery
Switchable impact rate between save mode and power mode
Model WH 14DSL
Slide type lithium-ion battery
Type BSL 1430 (Capacity: 3.0 Ah)
The Type BSL 1430 lithium-ion battery is equipped with the
overdischarge protection circuit, overcurrent protection circuit
and voltage monitoring circuit for each cell for longer service
life and safety.
• The Model WH 14DSL is equipped with the overdischarge
and overcurrent protection circuit to prevent overdischarge
(overuse) of the battery.
• The Type BSL 1430 lithium-ion battery is equipped with the
voltage monitoring circuit for each cell to prevent overcharge
of the battery.
Charger specifically designed
for slide type lithium-ion
batteries
Model UC 18YRSL Latch
(on both sides)
(2) Remove. (1) Push.
Battery
Tightening torque 145 N•m
(1,480 kgf•cm) Compact body: 145 mm in overall length
• Convenient for continuous operation in narrow places
Easy-to-grip thin handle
New type of hook
Switchable impact rate
between save mode and
power mode
• Suitable for tightening
machine screws
Built-in white LED light
Tool tip is structured without
screws. The protector is a
standard accessory.
Switch and monitor panel
• Remaining battery indicator lamp
• Remaining battery indicator switch
• Light switch

-3-
Latch
(on both sides)
(2) Remove. (1) Push.
Battery
Model WR 14DSL
Slide type lithium-ion battery
Type BSL 1430 (Capacity: 3.0 Ah)
The Type BSL 1430 lithium-ion battery is equipped with the
overdischarge protection circuit, overcurrent protection circuit
and voltage monitoring circuit for each cell for longer service
life and safety.
• The Model WR 14DSL is equipped with the overdischarge
and overcurrent protection circuit to prevent overdischarge
(overuse) of the battery.
• The Type BSL 1430 lithium-ion battery is equipped with the
voltage monitoring circuit for each cell to prevent overcharge
of the battery.
Tightening torque 165 N•m
(1,685 kgf•cm) Compact body: 152 mm in overall length
• Convenient for continuous operation in narrow places
Easy-to-grip thin handle
New type of hook
Switchable impact rate
between save mode and
power mode
• Suitable for tightening
small-diameter bolts
Built-in white LED light
Tool tip is structured without
screws. The protector is a
standard accessory.
Switch and monitor panel
• Remaining battery indicator lamp
• Remaining battery indicator switch
• Light switch
Charger specifically designed
for slide type lithium-ion
batteries
Model UC 18YRSL

-4-
5-1. Selling Point Descriptions
Selling points of the Models WH 14DSL and WR 14DSL:
(1) Equipped with the lightweight and high-capacity (3.0 Ah) lithium-ion battery
• Thanks to the adoption of the lithium-ion batteries, the Models WH 14DSL and WR 14DSL are
substantially lighter than the current models equipped with Ni-MH batteries.
BSL 1430 EB 1430H
Voltage (V) 14.4 14.4
Capacity (Ah) 3.0 3.0
Weight (g) 520 910
The Type BSL 1430 lithium-ion battery is equipped with the overdischarge protection circuit,
overload protection circuit, and voltage monitoring circuit for each cell to prevent shortening 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 Type BSL 1430 lithium-ion battery
The Type BSL 1430 lithium-ion battery 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(a)or (b) even if the switch is depressed continuously during
operation. This is because the protective function is activated. The battery is not faulty.
(a)The motor automatically stops when the remaining battery level is low (when the battery
voltage is decreased to about 8 V (Type BSL 1430)). Charge the battery immediately in
such case.
(b)The motor may stop if the Model WH 14DSL/WR 14DSL is overloaded. In such case,
release the switch and eliminate the cause of the overload problem. Then the Model
WH 14DSL/WR 14DSL will be operable.
Please instruct the customers on the above precautions.
(2) Switchable impact rate between save mode and power mode
The impact rate is switchable between two modes (save mode and power mode) according to
applications. Put the Model WH 14DSL/WR 14DSL into the save mode for tightening machine
screws into soft materials or put into the power mode for tightening long screws into hard
materials. These models are very convenient because the impact rate can be adjusted
according to the working conditions.
* Precautions for use in the save mode
If the Model WH 14DSL/WR 14DSL is operated continuously in the save mode, the temperature
of the electronic circuit modules in the switch may rise and it may result in burnout.
Tightening in the save mode*
•Suitable for light load operation
such as retightening machine
screws!
Tightening in the power mode
•Suitable for heavy load operation
such as tightening long screws and
bolts!
Switchable

-5-
(3) Remaining battery indicator
Each of the Models WH 14DSL and WR 14DSL is equipped with the remaining battery
indicator. The battery remaining power can be checked just by pressing the remaining battery
indicator switch.
(4) Built-in white LED light
Each of the Models WH 14DSL and WR 14DSL incorporates the white LED light. It is very
convenient for operation in dark places.
State of
lamp Battery remaining power
The battery remaining power
is enough (about 60% or
higher).
The battery remaining power
is a half.
The battery remaining power
is nearly empty (about 30% or
lower). Recharge the battery
immediately.
NOTE:
• The remaining battery indicator
lamp lights only after the battery
has been installed in the tool and
the trigger switch has been pulled
once.
• The indicator lamps of the high/lo
w
selector switch and the
single/continuous selector switch
go off immediately even though the
trigger switch is pulled when the
battery remaining power is nearly
empty and the protection function
is activated. It is not faulty.
NOTE:
• To prevent the battery power consumption
caused by forgetting to turn off the LED light,
the light goes off automatically in about 15
minutes.
• The white LED light is lighted by pressing the
light switch only after the battery has been
installed in the tool and the trigger switch has
been pulled once.
Remaining battery indicator switch
Remaining battery indicator lamp
Light switch

-6-
Selling points of the Model WH 14DSL
•High tightening speed and powerful torque: 145 N•m (1480 kgf•cm, 1280 in-lbs.)
(1) Tightening time comparison
Figure 1 shows the time required for tightening a wood screw (5.3 mm dia. x 120 mm
length) into a lauan workpiece.
•WH 14DSL: 7 % higher than P
Fig. 1 Tightening time comparison
* Tightening time may vary depending on hardness of the workpiece, ambient temperature,
characteristics of the battery, etc.
(2) Tightening torque comparison
Figure 2 shows the torque required
for tightening an M14 high-strength
tension bolt in 3 seconds with a
hexagon socket (40 mm long).
•WH 14DSL: 8 % higher than P
Fig. 2 Tightening torque comparison

-7-
Selling points of the Model WR 14DSL
•Powerful tightening torque: 165 N•m (1680 kgf•cm, 1460 in-lbs.)
(1) Tightening torque
Figure 3 shows the torque required for tightening an M16 F10T bolt in 3 seconds with a
hexagon socket (40 mm long).
Fig. 3
* The data above are intended for reference purposes only because actual tightening
torque will vary depending on tightening conditions.
Tightening torque