Hitachi DV18DL - 18V 3.0Ah Lithium Ion Cordless Hammer... User manual

TECHNICAL DATA
AND
SERVICE MANUAL
CORDLESS IMPACT
DRIVER DRILL
DV 18DL
DV 14DL
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST Nos. DV 18DL: G853
DV 14DL: G854
Jul. 2006
D
MODELS
DV 18DL
DV 14DL
Hitachi 
Power Tools

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:
Symbol Utilized
Competitor
Company Name Model Name
C-1 MAKITA BHP451
C-2 MAKITA BHP440

Page
CONTENTS
1. PRODUCT NAME .............................................................................................................................. 1
2. MARKETING OBJECTIVE ................................................................................................................ 1
3. APPLICATIONS ................................................................................................................................. 1
4. SELLING POINTS ............................................................................................................................. 2
4-1. Selling Point Descriptions ...................................................................................................................3
5. SPECIFICATIONS ............................................................................................................................. 7
5-1. Model DV 18DL ..................................................................................................................................7
5-2. Model DV 14DL ..................................................................................................................................8
6. COMPARISONS WITH SIMILAR PRODUCTS ................................................................................. 9
6-1. Model DV 18DL ..................................................................................................................................9
6-2. Model DV 14DL ................................................................................................................................10
7. WORKING PERFORMANCE PER SINGLE CHARGE ....................................................................11
7-1. Model DV 18DL ................................................................................................................................ 11
7-2. Model DV 14DL ................................................................................................................................12
8. PRECAUTIONS IN SALES PROMOTION ...................................................................................... 13
8-1. Safety Instructions ............................................................................................................................ 13
8-2. Inherent Drawbacks of Cordless Impact Driver Drills Requiring Particular Attention During Sales
Promotion ..........................................................................................................................................15
9. REFERENCE MATERIALS ............................................................................................................. 16
9-1. Speed Control Mechanism ...............................................................................................................16
10. REPAIR GUIDE ............................................................................................................................. 17
10-1. Precautions in Disassembly and Reassembly ................................................................................17
10-2. Precaution in Disassembly and Reassembly of Battery Charger ................................................... 27
11. STANDARD REPAIR TIME (UNIT) SCHEDULES......................................................................... 28
Assembly Diagram for DV18DL
Assembly Diagram for DV14DL

--- 1 ---
1. PRODUCT NAME
Hitachi 18 V Cordless Impact Driver Drill/Cordless Hammer Drill, Model DV 18DL
Hitachi 14.4 V Cordless Impact Driver Drill/Cordless Hammer Drill, Model DV 14DL
2. MARKETING OBJECTIVE
The Models DV 18DL and DV 14DL are the excellent, top-quality cordless impact driver drills developed to
reinforce our 18-V and 14.4-V product lines and also to meet the market demands. Each of these models is
equipped with a lithium-ion battery. The Model DV 18DL is compact and lightweight thanks to the new cyber
design. The overall length is 250 mm and the weight is 2.2 kg. While the Model DV 18DL is 3 mm shorter and
0.4 kg lighter than the conventional Model DV 18DMR, it provides the class-top maximum torque 64 N•m thanks to
the optimally designed motor and mechanical unit. Features of the Models DV 18DL and DV 14DL include the
following:
Powerful motor equipped with a large radial fan
Sturdy metal chuck and metal clutch cap
Selectable rotation speed in four steps with the shift knob and the change lever
Soft-grip handle widely covered with elastomer
Angle-adjustable one-touch hook
Replaceable carbon brushes and armature thanks to the same separate-type motor as an impact driver drill
with cord
Interchangeable with conventional NiCd or NiMH batteries
Thus the Models DV 18DL and DV 14DL are excellent in performance, operability and maintainability.
3. APPLICATIONS
Tightening and loosening wood screw, self-tapping screw and machine screw
Drilling into wood, plastic, mild steel and aluminum materials
Drilling into brick and concrete block

--- 2 ---
Side handle
No. 1 torque: Max. torque 64 N•m (Model DV 18DL)
52 N•m (Model DV 14DL)
No. 1 compact body: Overall length 250 mm
22-position torque adjustable clutch
Fine torque adjustment
3-mode selection
Drill
Impact drill
Driver
With injection-molded case
13 mm keyless chuck is operable with
one hand and equipped with ratcheting
lock mechanism
Prevents the driver bit from loosening
Operable with one hand
[Model DV 18DL]
Externally replaceable carbon
brushes and separate-type motor
The carbon brushes and the
armature are singly replaceable.
Improved overload durability
(improved cooling efficiency)
Large radial fan
Optimally designed cooling air path
Four-speed selection
Two-speed shift knob
Two-speed change lever
New lithium-ion battery
Light weight and stable design
Interchangeable with conventional
batteries
4. SELLING POINTS
Soft-grip handle
One-touch hook
Ready for use at anytime
(angle-adjustable in 5 steps)
Mountable on either side

--- 3 ---
DV 18DL
64
250
248
82
2.2
DV 18DMR
62
253
248
76
2.7
DV 18DV
45
242
247
76
2.5
C-1
63
250
257
78
2.2
Model
Max. torque [N•m]
Overall length [mm]
Overall height [mm]
Overall width [mm]
Weight [kg]
4-1. Selling Point Descriptions
4-1-1. Compact and high power: Max. torque 64 N•m (Model DV 18DL)
While the Model DV 18DL is compact and lightweight (overall length 250 mm, weight 2.2 kg), it provides the class-
top maximum torque 64 N•m thanks to the optimum design (see Tables 1 and 2). The Models DV 18DL and
DV 14DL can drill large diameter holes and tighten screws effortlessly.
4-1-2. Improved overload durability (improved cooling efficiency)
The Models DV 18DL and DV 14DL are equipped with the separate-type motor. To improve the overload durability
in continuous operation, the optimally designed cooling air path that is descended from the Model DS 12DM
increases the cooling efficiency as well as the large radial fan increases the volume of air. (See Fig.1.)
Table 1
DV 14DL
52
250
246
78
2.1
DV 14DMR
52
253
245
76
2.5
DV 14DV
39
242
242
76
2.2
C-2
25
204
242
79
1.7
Model
Max. torque [N•m]
Overall length [mm]
Overall height [mm]
Overall width [mm]
Weight [kg]
Table 2
Fig. 1 Curves of motor temperature rise
120
100
80
20
40
60
0
: Saturated (no abnormality)
DV 18DV
DS 18DL, DS 18DMR
020 40 60 80
Time (minute)
Temperature rise outside the motor
2.6 N.m {21 kgf.cm} intermittent load test [20 cycles/minute operation]

--- 4 ---
4-1-3. 22-position torque adjustable clutch
The 22-stage clutch ensures fine torque adjustment. (See Table 3.) The tightening torque is selectable up to 7 N
•
m.
The wider torque selectable range extends the range of applicable works.
4-1-4. 13 mm keyless chuck is operable with one hand and equipped with ratcheting lock mechanism
The sleeve can be turned with one hand. The driver bits can be easily replaced by holding the main unit with one
hand while turning the sleeve with other hand. The Models DV 18DL and DV 14DL are also equipped with the
ratcheting lock mechanism to prevent the sleeve from loosening during operation. A simple twist until a click is
heard locks the sleeve tight.
4-1-5. Four-speed selection
The rotation speed is selectable from four steps with the shift knob (two-speed gear) and the rotation change lever
(two-speed switch) for various applications such as tightening small-diameter screws and drilling.
When the rotation change lever is slid to the lower side, the power mode (P) is set and when slid to the upper
side, the save mode (S) is set.
Clutch cap position
1
4
7
10
19
22
Tightening torque
1.5 0.5 N•m {15 5 kgf•cm}
2.3 0.6 N•m {23 6 kgf•cm}
3.0 0.7 N•m {31 7 kgf•cm}
3.8 0.8 N•m {39 8 kgf•cm}
6.2 0.9 N•m {62 9 kgf•cm}
7 1.0 N•m {70 10 kgf•cm}
Table 3
*There may be difference in operation depending on the screw shapes and workpieces.
Perform a test before actual driving.
Save mode (S)
Power mode (P)
Rotation change lever
4-1-6. Soft-grip handle
The handles are 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.

--- 5 ---
4-1-7. One-touch hook
(1) The hook can be quickly slid out whenever necessary and slid in when not necessary.
(2) The hook is mountable on either side using a flat-blade screwdriver or a coin.
(3) The angle of the hook is adjustable in five steps.
Angle-adjustable in 5 steps Mountable on either side
4-1-8. Externally replaceable carbon brushes and separate-type motor
The carbon brushes are replaceable from the outside. In addition, the armature is singly replaceable through the
adoption of the separate-type motor that is the same as a driver drill with a power cord. Thus the Models DV 18DL
and DV 14DL are easier to maintain.
Armature
Magnet
Carbon brush
[Models DV 18DL and DV 14DL]
Separate-type motor

--- 6 ---
4-1-9. New Lithium-ion battery
Each of the Types EBM 1830 and EBL 1430 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 EBM 1830 and EBL 1430 lithium-ion batteries
Each of the Types EBM 1830 and EBL 1430 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 or even if the switch is depressed continuously during operation. This is because the protective
function is activated. The battery is not faulty.
The motor may stop automatically when the remaining battery level is low (when the battery voltage is
decreased to about 12 V (Type EBM 1830)/when decreased to about 8 V (Type EBL 1430)). Charge the
battery immediately in such case.
The motor may stop if the Model DV 18DL/DV 14DL is overloaded. In such case, release the switch and
eliminate the cause of the overload problem. Then the Model DV 18DL/DV 14DL is operable.
Please instruct the customers on the above precautions.
4-1-10. Others
The Models DV 18DL and DV 14DL have the following features common to the previous models.
The terminal is movable according to the movement of the battery to prevent damage to the contact portion.
The contact between the housing and the battery is changed from line contact to surface contact to minimize
rattling due to wear.
1
2
1
2

--- 7 ---
Indication of the pilot lamp
Charge status
lamp (Red)
Overheat lamp
(Green)
Before
charging
While
charging
Overheat
standby
Charging
impossible
Charging
completed
Blinks
(Red)
Lights
(Red)
Flickers
(Red)
Blinks
(Red)
Lights
(Green)
0.5 sec. ON 0.5 sec. OFF
Stays ON continuously
Stays ON continuously
Malfunction in the battery
or the charger.
Battery overheated.
Unable to charge.
(Charging will commence
when battery is cooled.)
0.5 sec. ON 0.5 sec. OFF
0.1 sec. ON 0.1 sec. OFF
Handle configuration T-type (with soft-grip handle)
Type of switch
Type of motor Fan cooled DC magnet motor
Trigger switch with push button for forward and reverse rotation changeover (with brake)
5. SPECIFICATIONS
5-1. Model DV 18DL
Screw driving Machine screw ......... 6 mm (1/4")
Wood screw ............. 8 mm dia. x 100 mm (#20 x 4")
Drilling Brick ......................... 16 mm (5/8") [Depth 30 mm (1-1/4")]
Metal Mild steel ..... 13 mm (1/2") [Thickness 1.6 mm (1/16")]
Aluminum .... 13 mm (1/2") [Thickness 1.6 mm (1/16")]
Wood ........................ 50 mm (2") [Thickness 18 mm (11/16")]
Capacity
Keyless chuck
(13VLRL-N)
Mount type ........ Screw-on (UNF 1/2" --- 20)
Diameter............ 1.5 --- 13 mm (1/16" --- 1/2")
Rotation speed (No-load) Low: 0 --- 200/400/min, High: 0 --- 900/1,800/min.
Net
Weight Main body unit (including battery) .................................................... 2.2 kg (4.8 lbs.)
Charger unit (UC 18YRL, including cord) ........................................ 0.6 kg (1.3 lbs.)
Torque Slip torque ..... 1.5 -- 7 N•m (15 -- 70 kgf•cm, 13 -- 61 in-lbs.) [22 stages]
Max. torque ..... Low: 64 N•m (653 kgf•cm, 570 in-lbs.), High: 14 N•m (143 kgf•cm, 124 in-lbs.)
Enclosure Body ........
Glassfiber reinforced polycarbonate resin (black) and thermoplastic elastomer (green)
Battery ..... Glassfiber reinforced polycarbonate resin (black)
Charger ... ABS resin (black)
Gross
Standard
accessories
Charger (UC 18YRL).............................................................................................. 1
Battery (EBM 1830)................................................................................................ 2
Phillips (plus) driver bit (No. 2) ............................................................................... 1
Side handle ............................................................................................................ 1
Case (injection-molded) ......................................................................................... 1
•••
Battery
(Type EBM 1830)
Sealed cylindrical lithium-ion storage battery
Nominal voltage .......... DC 18V
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 20ûC (68ûF)]
Operable ambient temperature range: 0ûC --- 40ûC (32ûF --- 104ûF)
The maximum allowable temperature of the Type EBM 1830 battery is 50ûC (122ûF)
(2MRK)
NOTE: When standby for cooling the battery, the Model UC 18YRL cools the overheated battery by the
cooling fan.
DV 18DL (2 MRK) ............................................................................ 6.4 kg (14.1 lbs.)
Indication method of battery charging function