Hitachi DV 20VB 2, DV 18V impact drill Technical Data and Service Manual
The Hitachi DV 20VB2 and DV 18V impact drills are upgraded versions of the DV 20VB, DV 20VC, DV 20T2, VTP-18, and VTV-18 models. They're designed to be compact, lightweight and powerful, featuring a class-top drilling speed and a durable aluminum gear cover and inner cover. The DV 20VB2 also includes a slip clutch mechanism for specific destinations.
advertisement
20 mm (3/4”) IMPACT DRILL
DV 20VB2
18 mm (11/16”) IMPACT DRILL
DV 18V
MODELS
DV 20VB2
DV 18V
Hitachi
Power Tools
D
TECHNICAL DATA
AND
SERVICE MANUAL
LIST Nos. DV 20VB2: E475
DV 18V: E476
Oct. 2004
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) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows:
Model DV 20VB2
Symbols Utilized
B
C
H
Company Name
BOSCH
MAKITA
METABO
Competitors
Model Name
GSB20-2RE
HP2051
SBE750
Model DV 18V
Symbols Utilized
B
H
Company Name
BOSCH
METABO
Competitors
Model Name
GSB18-2RE
SBE660
CONTENTS
Page
1. PRODUCT NAME
Hitachi 20 mm (3/4") Impact Drill, Model DV 20VB2
Hitachi 18 mm (11/16") Impact Drill, Model DV 18V
2. MARKETING OBJECTIVE
The Models DV 20VB2 and DV 18V are upgraded versions of the current Models DV 20VB, DV 20VC, DV 20T2,
VTP-18 and VTV-18. The performance is greatly improved.
These two models are developed under the concept for compact, lightweight and powerful. The main features of the Models DV 20VB2 and DV 18V are as follows:
(1) Compact and lightweight
(2) Class-top drilling speed
(3) Powerful motor
(4) Shortest chuck offset
(5) Durable aluminum gear cover and inner cover
(6) Two-finger sized trigger switch with speed control dial
3. APPLICATIONS
(1) Rotation and impacting function
Drilling into concrete, brick, ceramic tile, marble, granite and other stone materials
(2) Rotation only function
Drilling into metal, wood and plastics
4. SELLING POINTS
Compact and lightweight
Overall length: 333 mm (13-1/8")*
Weight:
DV 20VB2: 2.2 kg (4.9 lbs.)
DV 18V : 2.0 kg (4.4 lbs.)
Class-top drilling speed
*339 mm (13-11/32") with the slip clutch
Powerful motor
Power input:
DV 20VB2: 790 W
(120 V 8.3 A for U. S. A.)
DV 18V: 690 W
Soft grip handle for increased comfort
Shortest chuck offset
23.5 mm (15/16")
Durable aluminum gear cover and inner cover
Slip clutch mechanism
(Only the Model DV 20VB2 for specific destinations)
Push button type forward-reverse changeover switch
--- 1 ---
Two-finger sized trigger switch with speed control dial
4-1. Selling Point Descriptions
(1) Compact and lightweight design for less user fatigue
To make the Models DV 20VB2 and DV 18V compact is the first priority at designing. Entire length of these models is 333 mm (13-1/8")*
1
and the chuck offset is 23.5 mm (15/16"). The Model DV 20VB2 weighs 2.2 kg
(4.9 lbs.). The Model DV 18V weighs 2.0 kg (4.4 lbs.). Its ease of operation is the class-top level.
*1: 339 mm (13-11/32") with the slip clutch
(2) Class-top drilling speed
Thanks to the powerful motor (rated power consumption: DV 20VB2 790 W (120 V, 8.3 A), DV 18V 690 W), the Models DV 20VB2 and DV 18V can drill at the class-top speed while it is compact and lightweight. And powerful motor also provides high performance for heavy-duty applications.
(3) Easy-to-operate 2-finger sized trigger switch with speed control dial
The pulling amount of the trigger can be adjusted on the dial. It is convenient for operation keeping at a desired speed. The large variable speed control dial and the 2-finger sized trigger switch are easy to operate.
(4) Reliable and convenient push-button type forward/reverse changeover switch
The Models DV 20VB2 and DV 18V are equipped with the push-button type forward/reverse changeover switch that is more convenient and reliable than the lever-type switch. In addition, this switch is properly shaped and located not to make the pushbutton an obstacle at drilling.
(5) Durable aluminum die-casting inner cover and gear cover
The Models DV 20VB2 and DV 18V are equipped with the aluminum die-casting inner cover and gear cover for increased durability.
(6) Slip clutch mechanism (Only the Model DV 20VB2 for specific destinations)
The Model DV 20VB2 for specific destinations is equipped with the slip clutch mechanism to avoid direct and strong reaction force caused by application of a sudden and heavy load by slipping the transmission portion between the motor and the drill bit.
--- 2 ---
5. SPECIFICATIONS
5-1. Specifications
Model
Capacities Concrete
Drill chuck
Steel
Wood
DV 20VB2
Low speed: 20 mm (3/4") / High speed: 13 mm (1/2")
Low speed: 13 mm (1/2") / High speed: 8 mm (5/16")
Low speed: 40 mm (1-9/16") / High speed: 25 mm (1")
Mount type: UNF 1/2" --- 20
Capacity: 13 mm (1/2")
AC single phase commutator motor
Type of motor
Enclosure Housing
Handle
Inner cover
Power input
Cord
Weight
Packaging
Gear cover
Type of switch
Power source
Rated voltage
Rated current
No-load speed
Full-load impact rate
Full-load output
Net* 2
Gross
Standard accessories
Glassfiber reinforced polycarbonate + elastomer
Aluminum alloy die casting
Variable speed control trigger switch with reversing switch
AC single phase 50/60 Hz
(110 V, 120 V, 230 V, 240 V)
110 V: 7.6 A 120 V: 8.3 A* 1 230 V: 3.6 A 240 V: 3.5 A
790 W
2-core cabtire cord 2.5 m (8.3 ft.)
0 --- 1000/3000/min
8000/26000/min
440 W
2.2 kg (4.9 lbs.)
4.2 kg (9.3 lbs.)
Plastic carrying case
Side handle
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Depth gauge
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Chuck wrench (spec. only for chuck with chuck wrench )
• • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Plastic carrying case
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Optional accessories
Drill bit for concrete
* 1 : For U.S.A. and Canada only
* 2 : Without cord
--- 3 ---
Model
Capacities Concrete
Drill chuck
Steel
Wood
DV 18V
Low speed: 18 mm (11/16") / High speed: 13 mm (1/2")
Low speed: 13 mm (1/2") / High speed: 8 mm (5/16")
Low speed: 40 mm (1-9/16") / High speed: 25 mm (1")
Mount type: UNF 1/2" --- 20
Capacity: 13 mm (1/2")
AC single phase commutator motor
Glassfiber reinforced polycarbonate + elastomer
Type of motor
Enclosure Housing
Handle
Inner cover
Gear cover
Type of switch
Power source
Rated voltage
Rated current
Power input
Cord
No-load speed
Full-load impact rate
Full-load output
Weight Net* 1
Gross
Packaging
Standard accessories
Optional accessories
* 1 : Without cord
Aluminum alloy die casting
Variable speed control trigger switch with reversing switch
AC single phase 50/60 Hz
(110 V, 220 V, 230 V, 240 V)
110 V: 6.6 A 220 V: 3.3 A 230 V: 3.2 A 240 V: 3.0 A
690 W
2-core cabtire cord 2.5 m (8.3 ft.)
0 --- 1000/3000/min
8000/26000/min
340 W
2.0 kg (4.4 lbs.)
4.2 kg (9.3 lbs.) including the case. 3 kg (6.6 lbs.) excluding the case.
Corrugated cardboard box or plastic carrying case
Side handle
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Depth gauge
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Chuck wrench (spec. only for chuck with chuck wrench )
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1
Plastic carrying case (provided only for the models specified to include the case)
•• •
1
Drill bit for concrete
--- 4 ---
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparisons
700 W class
Maker
Model
Capacities
Concrete mm (in.)
Steel mm (in.)
Wood mm (in.)
W Rated power input
No-load speed
No-load impact rate
Low
High
Low
High
Max. torque
No-load noise level
Housing structure
Gear cover material
Slip clutch
Soft grip handle
Speed control dial
Type of reversing switch
Overall length
Low
High
/min.
/min.
/min.
/min.
N.m
N.m
dB mm (in.)
Chuck offset
Weight
*
: With the slip clutch
*
: Depends on the destinations.
mm (in.) kg (lbs.)
Push button
339 (13-11/32")
*
2
/333 (13-1/8")
23.5 (15/16")
2.2 (4.9 lbs.)
DV 20VB2
HITACHI
DV 20VB
20 (3/4")
13 (1/2")
40 (1-9/16")
790
(120 V: 8.3 A)
0 1,000
0 3,000
0 13,000
0 39,000
54.1 (29.5)
*
1
19.6 (10.7) *
1
79
Cylindrical
Aluminum
*
2
20 (3/4")
13 (1/2")
40 (1-9/16")
750
0 1,100
0 2,600
0 17,600
0 41,600
44.5
18.1
81
Cylindrical
Plastic
29.0 (1-5/32")
2.3 (5.1 lbs.)
H
20 (3/4")
13 (1/2")
40 (1-9/16")
750
0 1,000
0 3,000
0 19,000
0 57,000
79
Cylindrical
Aluminum
C
20 (3/4")
13 (1/2")
40 (1-9/16")
720
(120 V: 8.2 A)
0 1,200
0 2,900
0 24,000
0 58,000
81
Cylindrical
Aluminum
B
(Reference)
20 (3/4")
13 (1/2")
40 (1-9/16")
800
0 1,100
0 3,000
0 17,600
0 48,000
87
Cylindrical
Aluminum
Lever
340 (13-3/8")
Brush shift
Lever
368 (14-31/64")
360 (14-3/16")
Brush shift
356 (14-1/64")
27.5 (1-3/32")
2.3 (5.1 lbs.)
24.5 (31/32")
2.3 (5.1 lbs.)
30.0 (1-3/16")
2.6 (5.7 lbs.)
600 W class
Maker
Model
Capacities
Rated power input
No-load speed
No-load impact rate
Max. torque
No-load noise level
Housing structure
Gear cover material
Slip clutch
Soft grip handle
Speed control dial
Type of reversing switch
Overall length
Chuck offset
Weight
Concrete mm (in.)
Steel mm (in.)
Wood mm (in.)
Low
W
/min.
High
Low
High
Low
High
/min.
/min.
/min.
N.m
N.m
dB mm (in.) mm (in.) kg (lbs.)
Push button
333 (13-1/8")
23.5 (15/16")
2.0 (4.4 lbs.)
DV 18V
18 (11/16")
13 (1/2")
40 (1-9/16")
690
0 1,000
0 3,000
0 13,000
0 39,000
53.0
19.2
79
Cylindrical
Aluminum
HITACHI
VTP-18
18 (11/16")
13 (1/2")
640
0 1,050
0 1,800
0 21,000
0 36,000
27.8
17.2
82
Cylindrical
Aluminum
VTV-18
18 (11/16")
13 (1/2")
640
0 1,050
0 1,800
0 21,000
0 36,000
27.8
17.2
82
Cylindrical
Aluminum
H
16 (5/8")
13 (1/2")
30 (1-3/16")
660
0 1,000
0 3,000
0 19,000
0 57,000
35.7
11.8
79
Cylincrical
Aluminum
B
(Reference)
18 (11/16")
13 (1/2")
40 (1-9/16")
750
0 1,000
0 3,000
0 16,000
0 48,000
30.2
10.3
85
Clamshell
340 (13-3/8")
25.0 (1")
2.3 (5.1 lbs.)
340 (13-3/8")
25.0 (1")
2.3 (5.1 lbs.)
Brush shift
359 (14-9/64")
27.5 (1-3/32")
2.1 (4.6 lbs.)
Brush shift
346 (13-5/8")
30 (1-3/16")
2.2 (5.1 lbs.)
--- 5 ---
6-2. Drilling Speed Comparisons
Drilling speed depends on the operating conditions. The test results are based on actual factory tests, and should be used as a reference only.
700 W class
500
400
300
450
Test condition:
Mortar panel compression strength: 24 N/mm
2
Pressing force: 300 N
360
348
258
210
200
100
0
DV 20VB2
HITACHI
DV 20VB
HITACHI
B
Maker
C
H
600 W class
300
200
100
0
500
400
450
Test condition:
Mortar panel compression strength: 24 N/mm
2
Pressing force: 300 N
348
329
276
DV 18V
HITACHI
VTP-18
HITACHI
Maker
B
H
--- 6 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Models DV 20VB2 and DV 18V Impact Drills by all of our customers, it is very important that at the time of sales 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 attached to each tool.
7-1. Handling Instructions
Although every effort is made in each step of design, manufacture and inspection to provide protection against safety hazards, the dangers inherent in the use of any electric power tool cannot be completely eliminated.
Accordingly, general precautions and suggestions for the use of electric power tools, and specific precautions and suggestions for the use of the Impact Drill are listed in the Handling Instructions to enhance the safe, efficient use of the tool by the customer. Salespersons must be thoroughly familiar with the contents of the Handling
Instructions to be able to offer appropriate guidance to the customer during sales promotion.
7-2. Cautions on Name Plate
The following basic safety precautions are listed on the Name Plate attached to the main body of each tool.
For Australia, New Zealand and China
CAUTION
Read thoroughly HANDLING INSTRUCTIONS before use.
For the U.S.A. and Canada
WARNING
To reduce the risk of injury, user must read and
understand the instruction manual.
AVERTISSEMENT
Afin de reduire le risque de blessures, l'utilisateur doit lire
et bien comprendre le mode d'emloi.
These precautions are not listed on the Name Plates of the products destined for the countries other than
Oceania, China, the U.S.A. and Canada.
--- 7 ---
7-3. Precautions on Usage
(1) IMPACT to ROTATION changeover
Shift the change lever between the right and left positions to switch easily between IMPACT
(rotation and impact) and ROTATION (rotation only), respectively.
To bore holes in hard materials such as concrete, stone and tiles, shift the change lever to the righthand position (as indicated by the mark).
The drill bit operates by the combined actions of impact and rotation.
Change lever
Fig. 1
To bore holes in metal, wood and plastic, shift the change lever to the left-hand position (as indicated by the mark). The drill bit operates by rotational action only, as in the case of a conventional elecric drill.
CAUTION:
Do not use the hammer drill in the IMPACT function if the material can be bored by rotation only.
Such action will not only reduce drill efficiency, but may also damage the drill tip.
Operating the hammer drill with the change lever in mid-position may result in damage.
When switching, make sure that you shift the change lever to the correct position.
NOTE:
The change lever may not shift smoothly when changing from hammer drill mode to drill mode.
In this case, switch ON and operate the machine for few seconds. The spindle shaft will then be pushed forward, and the change lever can be moved smoothly.
(2) High-speed/low-speed changeover
Prior to changing speed, ensure that the switch is in the OFF position, and the drill has come to a complete stop.
To change speed, rotate the gear shift dial as indicated by the arrow in Fig. 2. The numeral "1" engraved on the drill body denotes low speed, the numeral "2" denotes high speed.
If it is hard to turn the gear shift dial, turn the chuck slightly in either direction and then turn the gear shift dial again.
Fig. 2
Gear shift dial
--- 8 ---
(3) Check the rotational direction
The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button.
The L-side of the push button is pushed to turn the bit counterclockwise.
CAUTION: Always use the hammer drill with clockwise rotation, when using it as an hammer drill.
L mark
Push button
Switch trigger
R mark
Fig. 3
(4) Switch operation
When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops.
The rotational speed of the drill can be controlled by varying the amount that the trigger switch is pulled.
Speed is low when the trigger switch is pulled slightly and increases as the trigger switch is pulled more.
The desired rotation speed can be preselected with the speed control dial. Turn the speed control dial clockwise for higher speed and counterclockwise for lower speed.
Speed control dial
Low speed
Switch trigger
Fig. 4
Stopper
High speed
Pulling the trigger and pushing the stopper, it keeps the switched-on condition which is convenient for continuous running. When switching off, the stopper can be disconnected by pulling the trigger again.
NOTE: If the L-side of push button is pressed for reverse bit rotation, the stopper cannot be used.
--- 9 ---
(5) Drilling
When drilling, start the drill slowly, and gradually increasing speed as you drill.
Always apply pressure in a straight line with the bit. Use enough pressure to keep drilling, but do not push hard enough to stall the motor or deflect the bit.
To minimize stalling or breaking through the material, reduce pressure on drill and ease the bit through the last part of the hole.
If the drill stalls, release the trigger immediately, remove the bit from the work and start again. Do not click the trigger on and off in an attempt to start a stalled drill. This can damage the drill.
WARNING: The larger the drill bit diameter, the larger the reactive force on your arm. Be careful not to
lose control of the drill because of this reactive force. To maintain firm control, establish
a good foothold, use side handle, hold the drill tightly with both hands, and ensure that
the drill is vertical to the material being drilled.
(6) Slip clutch mechanism (Only the Model DV 20VB2 for specific destinations)
The Model DV 20VB2 (only for specific destinations) is equipped with the slip clutch mechanism to avoid direct and strong reaction force caused by application of a sudden and heavy load by slipping the transmission portion between the motor and the drill bit.
CAUTION:
Turn off the switch immediately if the rotation of the drill bit is stopped by the slip clutch. Be careful not to actuate the slip clutch frequently.
The spindle shaft torque and the reaction force applied to the side handle when the slip clutch actuates are shown in the table below. In the case of the low gear, the reaction force applied to the side handle may be 345.1 N {35.2 kgf} at the maximum. Instruct the customers to use the side handle without fail and securely hold the Model DV 20VB2 with both hands standing on a good foothold, not to be affected by the reaction force.
High gear
Low gear
Minimum
Maximum
Minimum
Maximum
Spindle shaft torque
N
.
m
5.4
15.9
15.0
44.0
kgf
.
0.6
1.6
1.5
4.5
m
Reaction force applied to the side handle
N
42.6
kgf
4.3
124.9
117.6
345.1
12.7
12.0
35.2
--- 10 ---
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram.
The
[Bold]
numbers are for the Model DV 20VB2, the
<Bold>
numbers for the Model DV 18V.
8-1. Disassembly
8-1-1. Motor section disassembly
(1) Removal of the handle cover
Loosen the Tapping Screws (W/Flange) D4 x 20 (Black)
[40] <39>
, and remove the Handle Cover
[41] <40>
.
(2) Removal of the carbon brushes
With a small flat-blade screwdriver, slightly lift the Brush Holders
[47] <46>
. Then, while pushing the Carbon
Brushes (1 Pair)
[46] <45>
to the bottom of the brush holders, gently pull out and disconnect the internal wire terminals. (See Figs. 5 and 6.)
Terminal
Carbon brush stop piece
Carbon brush stop piece
Pull out
Carbon brush
Brush holder
Terminal
Projection
Push
Fig. 5 Fig. 6
(3) Removal of the gear cover from the housing
Loosen the Tapping Screws (W/Flange) D5 x 45 (D5 x 50: with clutch)
[12] <12>
and separate Gear Cover (A)
Ass'y
[25] <25>
from the Housing
[38] <37>
. Then, remove the Inner Cover
[18] <18>
together with the
Armature
[33] <32>
from the Housing
[38] <37>
.
--- 11 ---
(4) Removal of the armature from the inner cover
As illustrated in Fig. 9, support the Inner Cover
[18] <18>
with a tubular jig, and push down on the top of the pinion of the Armature
[33] <32>
.
Push.
Pinion
Inner Cover
[18] <18>
Armature
[33] <32>
Fig. 7
(5) Removal of the stator from the housing
First, disconnect the internal wires from the Switch (1P Pillar Type)
[43] <42>
. To disconnect the internal wires from the switch, insert a small flat-blade screwdriver into the windows near the terminals and pull out the internal wires. Remove the Hex. Hd. Tapping Screws D4 x 50
[35]
, D4 x 45
<34>
and tap the end surface of the Housing
[38] <37>
slightly with a wooden hammer. Then the stator can be removed from the housing.
8-1-2. Inner cover ass'y disassembly
Removal of the change lever
Remove the Change Cover
[16] <16>
and the Change Lever
[15] <15>
.
--- 12 ---
8-1-3. Removal of the drill chuck
The Drill Chuck
[3] <3>
is secured to the Spindle
[4] <4>
with 1/2"-20 UNF (right hand) and Flat Hd. Screw (A)
(Left Hand) M6 x 25
[1] <1>
. At first, open the chuck jaw as far as possible and loosen Flat Hd. Screw (A) (Left
Hand) M6 x 25
[1] <1>
by turning it clockwise.
a. Hold the drill so that only the Drill Chuck
[3] <3>
rests firmly and squarely on the edge of a solid bench.
Install the hex. bar wrench into the drill chuck. Turn the drill chuck until the wrench is at about a 30 û angle to the bench top and strike the wrench sharply with a hammer so the drill chuck turns in the counterclockwise direction. (Fig. 8)
Hex. bar wrench
Flat Hd. Screw (A)
(Left Hand) M6 x 25
[1] <1>
Loosen
Fig. 8
If the drill chuck cannot be removed by striking the wrench, do not strike the wrench forcibly and try another way as follows.
b. Hold the Spindle
[4] <4>
with the open-end wrench secured to the vise as shown in Fig. 9 .
Mount the pipe to the hex. bar wrench. Turn the hex. bar wrench counterclockwise to loosen the drill chuck.
(Fig. 9)
Pipe
Turn it counterclockwise.
Hex. bar wrench
Vise
Open-end wrench
Fig. 9
--- 13 ---
c. (For keyed chuck only)
Secure the drill chuck with a disassembly tool: Ring (J-78) to the drill chuck, which in proper sequence should be secured with a vise. Then fit a disassembly tool: Wrench Ass'y (J-140) to the spindle, and turn it counterclockwise to loosen the drill chuck. (Fig. 10)
Turn it counterclockwise.
Ring ass'y and ring (J-78)
Wrench ass'y (J-140)
Vise Drill chuck
Fig. 10
8-1-4. Gear cover section disassembly
(1) Removal of the spindle
Remove the Retaining Ring For D35 Hole
[5] <5>
and the Dust Seal
[6] <6>
.
Support the tip of the Gear Cover (A) Ass'y
[25] <25>
with a cylindrical jig of inside diameter 35 mm or more, and push the rear portion of the Spindle
[4] <4>
lightly. Then the spindle can be removed together with the
Ball Bearing 6202DDCMPS2L
[7] <7>
and Spring (A)
[9] <9>
. (Fig. 11)
Push.
Spindle
[4] <4>
Dia. 35 min.
Fig. 11
--- 14 ---
(2) Removal of the shift lever
Position the Shift Lever Ass'y
[19] <19>
as shown in Fig. 12. Push both ends of the Retaining Ring (E-type) for D15 Shaft
[26] <26>
with a pair of long-nose pliers until a clearance about 1 to 2 mm is made. Keeping the clearance, turn the Shift Lever Ass'y
[19] <19>
by 180 degrees together with the Retaining Ring (E-type) for
D15 Shaft
[26] <26>
. Insert a flat-blade screwdriver into the clearance and pry the Retaining Ring (E-type) for
D15 Shaft
[26] <26>
off upward.
CAUTION:
If the Retaining Ring (E-type) for D15 Shaft [26] <26> is pushed excessively, the Shift Lever Ass'y [19]
<19> cannot be turned due to a wide clearance.
Shift Lever Ass'y
[19] <19>
2
Push.
3
Turn.
Gear Cover (A) Ass'y
[25] <25>
Retaining Ring (E-type) for D15 Shaft
[26] <26>
Clearance
Fig. 12
--- 15 ---
8-2. Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special attention should be given to the following items.
8-2-1. Internal wire arrangement
(1) Arrange the internal wires according to "8-4. Internal Wire Arrangement and Wiring Work".
(2) Be careful not to catch the internal wires when mounting the handle cover.
8-2-2. Lubrication
(1) Apply ATTLUB MS No. 2 Grease to the following parts.
Teeth of the Second Pinion and Gear Set
[14] <14>
, the Gear Set
[29] <29>
.
On the Spindle
[4] <4>
.
Ground portion for fitting the Ball Bearing 6202DDCMPS2L
[7] <7>
, splined portion and hole of rear side.
On the Shift Lever Ass'y
[19] <19>
.
Outer circumference portion of the Shift Pin
[21] <21>
, the O-ring (S-22)
[22] <22>
.
On the Change Shaft
[17] <17>
.
Outer circumference portion.
Lip portion of the Dust Seal
[6] <6>
.
On the Inner Cover
[18] <18>
.
Metal portion.
Inside of Gear Cover (A) Ass'y
[25] <25>
: 5 g
(2) Apply MORABUAROI 777-1 to the following parts.
On Gear Cover (A) Ass'y
[25] <25>
.
Teeth of Ratchet (B)
[11] <11>
.
Teeth of Ratchet (A)
[8] <8>
.
8-2-3. Tightening torque
(1) Flat Hd. Scerw (A) (Left Hand) M6 x 25
[1] <1>
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
4.0 to 5.0 N
• m (39.0 to 47.8 in-lbs.)
(2) Tapping Screw (W/Flange) D4 x 20 (Black)
[40] <39>
• • • • • • • • • • • • • • • • • • • • • • • • • • • •
1.5 to 2.5 N
• m (13.3 to 22.1 in-lbs.)
(3) Tapping Screw (W/Flange) D5 x 45
[12] <12>
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
2.4 to 3.4 N
• m (21.3 to 30.1 in-lbs.)
(4) Drill Chuck
[3] <3>
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
29.4 to 39.2 N
• m (260 to 347 in-lbs.)
--- 16 ---
8-2-4. Reassembly of the gear cover section
Figure 13 shows the assembly drawing. Reassemble the gear cover section according to the following figure.
Pin D5
Shift Arm
[27] <27>
Shift Lever Ass'y
[19] <19>
[28] <28>
Steel Ball D6.35
[10] <10>
Second Pinion and Gear Set
[14] <14>
Steel Ball D3.5
[24] <24>
Washer (B)
[13] <13>
Spring (H)
[23] <23>
Gear Set
[29] <29>
Ratchet (B)
[11] <11>
Spring (A)
[9] <9>
Ratchet (A)
[8] <8>
Ball Bearing
6202DDCMPS2L
[7] <7>
Dust Seal
[6] <6>
Retaining Ring for D35 Hole
[5] <5>
Spindle
[4] <4>
Fig. 13
CAUTION:
Be sure to replace Ratchet (A)
[8] <8>
with a new one. Never reuse Ratchet (A)
[8] <8>
previously removed from the Spindle
[4] <4>
. If reused, the tightening torque between Ratchet (A)
[8] <8>
and the Spindle
[4] <4>
will be far too low and the Spindle
[4] <4>
may run idle in the IMPACT mode.
Mounting directions of the Shift Arm
[27] <27>
and the Gear Set
[29] <29>
are specified. Mount these parts in the specified direction as shown in the above figure.
--- 17 ---
(With slip clutch)
Steel Ball D6.35
[10]
Second Pinion and Gear Set
[14]
Pin D5
[28]
Shift Arm
[27]
Shift Lever Ass'y
[19]
Steel Ball D3.5
[24]
Washer (B)
[13]
Spring (H)
[23]
Gear Set
[29]
Ratchet (B)
[11]
Spring (A)
[9]
Dust Seal
[6]
Ratchet (A)
[8]
Ball Bearing
6202DDCMPS2L
[7]
Retaining Ring for D35 Hole
[5]
Spindle
[4]
Fig. 14
CAUTION:
Be sure to replace Ratchet (A)
[8]
with a new one. Never reuse Ratchet (A)
[8]
previously removed from the
Spindle
[4]
. If reused, the tightening torque between Ratchet (A)
[8]
and the Spindle
[4]
will be far too low and the Spindle
[4]
may run idle in the IMPACT mode.
Mounting directions of the Shift Arm
[27]
, Gear Set
[29]
and Spring (A)
[9]
are specified. Mount these parts in the specified direction as shown in the above figure.
--- 18 ---
8-3. Wiring Diagrams
(1) For products with noise suppressor
Brown
Choke coil
White
Stator
Gray
Black or brown
Cord ass'y
Noise suppressor
Blue
Choke coil
Reversing switch
Black
Stator
Red
Speed control switch
White or blue
Fig. 15
(2) For products without noise suppressor
White
Stator
Gray
Brown
Black or brown
Cord ass'y
Blue
Reversing switch
Black
Stator
Red
Fig. 16
Speed control switch
White or blue
--- 19 ---
8-4. Internal Wire Arrangement and Wiring Work
A. Internal wire arrangement
(1) For products with noise suppressor
Natural (Noise suppressor)
CB terminal
Carbon brush
Black (Stator)
Brown (Choke coil)
White (Stator)
Blue (Choke coil)
Armature
Switch
Red (Stator)
Gray (Stator)
Noise suppressor
Cord
Fig. 17
--- 20 ---
(2) For products without noise suppressor
Armature
Switch
Red (Stator)
Gray (Stator)
Brown
Black (Stator)
White (Stator)
Blue (CB)
Cord
Fig. 18
--- 21 ---
B. Switch connection
(1) Wiring of reversing switch
Blue
(Choke coil/Lead wire)
(1) (3)
White
(Stator)
Black
(Stator)
(4)
Fig. 19
(2)
Brown
(Choke/Lead wire)
(2) Wiring of speed control switch
Black or brown
(Cord)
(1 )
White or blue
(Cord)
(2 )
Red
(Stator)
(M2)
(M1)
Gray
(Stator)
Noise suppressor
Fig. 20
--- 22 ---
8-5. Insulation Tests
On completion of reassembly after repair, measure the insulation resistance and conduct the dielectric strength test.
Insulation resistance: 7 M
Ω
or more with DC 500 V megohm tester
Dielectric strength: AC 4,000 V/1 minute, with no abnormalities 220 V --- 240 V (and 110 V for U.K. products)
AC 2,500 V/1 minute, with no abnormalities 110 V --- 127 V (except U.K. products)
8-6. No-Load Current Value
After no-load operation for 30 minutes, the no-load current value should be as follows.
Model DV 20VB2
Voltage (V)
Current (A) Max.
110
3.5
120
3.2
230
1.6
240
1.5
Model DV 18V
Voltage (V)
Current (A) Max.
110
3.5
220
1.7
230
1.6
240
1.5
--- 23 ---
9. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL
DV 20VB2
Fixed
Variable
10
Work Flow
20 30 40
50
60 min.
General Assembly
Handle Cover
Cord Armor
Switch
Cord
Housing
Stator
Armature
Ball Bearing
(608DD)
Ball Bearing
(608VV)
Inner Cover
Second Pinion and Gear Set
Change Lever
Change Cover
Change Shaft
Drill Chuck
Spindle
Ball Bearing
(6202DD)
Ratchet (A)
Spring (A)
Gear Cover
(A) Ass'y
Ratchet (B)
Shift Lever
Ass'y
Spring (H)
Shift Arm
Gear Set
--- 24 ---
MODEL
Fixed
Variable
10
Work Flow
DV 18V
20 30 40
50 60 min.
General Assembly
Handle Cover
Cord Armor
Switch
Cord
Housing
Stator
Armature
Ball Bearing
(608DD)
Ball Bearing
(608VV)
Inner Cover
Second Pinion and Gear Set
Change Lever
Change Cover
Change Shaft
Drill Chuck
Spindle (B)
Ball Bearing
(6202DD)
Ratchet (A)
Spring (A)
Gear Cover
(A) Ass'y
Ratchet (B)
Shift Lever
Ass'y
Spring (H)
Shift Arm
Gear Set
--- 25 ---
Hitachi Power Tools
LIST NO. E475
ELECTRIC TOOL PARTS LIST
IMPACT DRILL
Model DV 20VB2
2004
•
4
•
20
(E1)
1
2
3
3
3
4
5
6
7
8
9
10
11
12
31
32
33
13
19
20
21
22 14
34
35
23
24
36
25
26
27
28
37
29
38
13
30
15
16
17
18
501
502
503
41
40
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
39
*
PARTS
ITEM
NO.
CODE NO.
1
DESCRIPTION
NO.
USED
REMARKS
995-344 FLAT HD. SCREW (A) (LEFT HAND) M6X25 1 EXCEPT FOR DRILL CHUCK 13VLN
2 987-576 CHUCK WRENCH FOR 13VLB-D, 13VLR-D 1
* 12
13
* 14
* 14
15
16
17
* 18
* 18
19
20
21
22
*
*
*
*
*
10
11
* 12
8
9
6
7
4
4
5
3
3
3
* 30
31
32
* 33
* 33
* 33
* 33
34
35
* 36
* 36
* 36
* 36
37
38
27
* 28
* 28
29
23
24
25
26
321-814 DRILL CHUCK 13VLRB-D 1 INCLUD. 1, 2
319-546
DRILL CHUCK 13VLRE-N (W/O CHUCK WRENCH)
1
316-280
DRILL CHUCK 13VLN (W/O CHUCK WRENCH)
1
322-857 SPINDLE (B)
322-866 SPINDLE (A)
939-556 RETAINING RING FOR D35 HOLE (10 PCS.) 1
1
1 FOR SLIP CLUTCH
322-851 DUST SEAL
620-2DD BALL BEARING 6202DDCMPS2L
322-850 RATCHET (A)
984-101 SPRING (A)
959-150 STEEL BALL D6.35 (10 PCS.)
322-845 RATCHET (B)
316-321 TAPPING SCREW (W/FLANGE) D5X45
1
1
1
1
1
1
4
322-869
TAPPING SCREW (W/FLANGE) D5X50 (BLACK)
4 FOR SLIP CLUTCH
322-852 WASHER (B) 2
322-858 SECOND PINION AND GEAR SET 1
322-867 SECOND PINION AND GEAR SET
322-841 CHANGE LEVER
322-842 CHANGE COVER
1
1
1
FOR SLIP CLUTCH
322-840 CHANGE SHAFT
322-859 INNER COVER (B)
322-868 INNER COVER (A)
322-847 SHIFT LEVER ASS’Y
SHIFT LEVER
322-848 SHIFT PIN
306-353 O-RING (S-22)
1
1
1 FOR SLIP CLUTCH
1 INCLUD. 20-22
1
1
1
981-328 SPRING (H)
319-535 STEEL BALL D3.5 (10 PCS.)
1
1
322-844 GEAR COVER (A) ASS’Y 1 INCLUD. 11
323-048
RETAINING RING (E-TYPE) FOR D15 SHAFT
1
322-849 SHIFT ARM
322-860 PIN D5
984-104 PIN D5
322-846 GEAR SET
1
1
1
1
FOR SLIP CLUTCH
LABEL (FOR SLIP CLUTCH)
608-DDM BALL BEARING 608DDC2PS2L
939-553 RETAINING RING FOR D22 HOLE (10 PCS.) 1
360-652C ARMATURE 110V 1
1 FOR SLIP CLUTCH
1
360-652U ARMATURE ASS’Y 120V
360-652E ARMATURE 230V
360-652F ARMATURE 240V
1
1
1
INCLUD. 31, 37
322-843 FAN GUIDE
961-672 HEX. HD. TAPPING SCREW D4X50
340-587C STATOR 110V
340-587D STATOR 120V
340-587E STATOR 230V
340-587F STATOR 240V
608-VVM BALL BEARING 608VVC2PS2L
322-861 HOUSING
1
2
1
1
1
1
1
1
--- 2 ---
* ALTERNATIVE PARTS
DV 20VB2
4 -- 04
54
55
* 56
* 56
* 56
* 56
* 56
* 56
* 56
* 56
43
* 44
* 45
* 45
46
47
48
* 49
* 50
* 51
* 52
* 52
53
PARTS
ITEM
NO.
CODE NO.
39
40
NAME PLATE
DESCRIPTION
NO.
USED
1
301-653
TAPPING SCREW (W/FLANGE) D4X20 (BLACK)
3
41
42
322-862 HANDLE COVER
322-853 PUSHING BUTTON
1
1
322-854 SWITCH (1P PILLAR TYPE)
321-630 INTERNAL WIRE (BROWN) 100L
322-517 CHOKE COIL (BROWN) 220V-240V
322-518 CHOKE COIL (BROWN) 110V
999-041 CARBON BRUSH (1 PAIR)
955-203 BRUSH HOLDER
HITACHI LABEL
994-273 NOISE SUPPRESSOR
992-635 EARTH TERMINAL
321-631 INTERNAL WIRE (BLUE) 55L
321-634 CHOKE COIL (BLUE) 110V-240V
322-519 CHOKE COIL (BLUE) 110V
984-750 TAPPING SCREW (W/FLANGE) D4X16
937-631 CORD CLIP
953-327 CORD ARMOR D8.8
500-409Z CORD
500-423Z CORD
500-439Z CORD
500-247Z CORD
500-240Z CORD
500-461Z CORD
500-435Z CORD
500-447Z CORD
REMARKS
1
1 FOR SIN, USA, CAN
1 EXCEPT FOR SIN, USA, CAN
2
1
1 FOR GBR (110V)
2
1 EXCEPT FOR SIN, USA, CAN
1 EXCEPT FOR SIN, USA, CAN
1 FOR SIN, USA, CAN
1 EXCEPT FOR SIN, USA, CAN
1 FOR GBR (110V)
2
1
1
1 (CORD ARMOR D8.8)
1 (CORD ARMOR D8.8) FOR SIN
1 (CORD ARMOR D8.8) FOR NZL, AUS
1 (CORD ARMOR D8.8) FOR NOR, FIN
1 (CORD ARMOR D8.8) FOR USA, CAN
1 (CORD ARMOR D8.8) FOR GBR (110V)
1 (CORD ARMOR D8.8) FOR GBR (230V)
1 (CORD ARMOR D8.8) FOR SUI
DV 20VB2
4 -- 04
* ALTERNATIVE PARTS
--- 3 ---
STANDARD ACCESSORIES
ITEM
NO.
CODE NO.
DESCRIPTION
501 322-706 CASE
502 323-050 SIDE HANDLE
503 303-709 DEPTH GAUGE
NO.
USED
1
1
1
REMARKS
DV 20VB2
OPTIONAL ACCESSORIES
ITEM
NO.
CODE NO.
DESCRIPTION
601 931-851 DRILL BIT (B) D6.5X100
602 931-852 DRILL BIT (B) D8.0X100
603 931-853 DRILL BIT (B) D9.5X120
604 931-854 DRILL BIT (B) D10.0X120
605 971-704 DRILL BIT (B) D12.0X160
606 931-855 DRILL BIT (B) D13.0X160
607 931-776 DRILL BIT (B) D14.3X160
608 971-670 DRILL BIT (B) D16.0X160
609 931-856 DRILL BIT (B) D19.0X160
1
1
1
1
NO.
USED
1
1
1
1
1
REMARKS
--- 4 ---
* ALTERNATIVE PARTS
Printed in Japan
4 -- 04
(040420N)
Hitachi Power Tools
LIST NO. E476
ELECTRIC TOOL PARTS LIST
IMPACT DRILL
Model DV 18V
2004
•
4
•
20
(E1)
6
7
8
9
10
11
12
1 2
3
3
4
5
30
31
501
502
32
40
13
19
20
21
22 14
33
34
23
24
25
26
27
28
35
36
29
13
37
38
41
42
43
44
45
46
47
503
52
53
54
55
39
48
49
50
51
15
16
17
18
*
*
*
30
31
* 32
* 32
* 32
33
34
* 35
* 35
* 35
36
37
38
42
* 43
* 44
39
40
41
26
27
28
29
23
24
25
19
20
21
22
16
17
18
13
14
15
10
11
12
8
9
6
7
3
4
5
PARTS
ITEM
NO.
CODE NO.
1
DESCRIPTION
NO.
USED
995-344 FLAT HD. SCREW (A) (LEFT HAND) M6X25 1
2
3
REMARKS
987-576 CHUCK WRENCH FOR 13VLB-D,13VLR-D 1
DRILL CHUCK 1 INCLUD. 1, 2 SUPPLIED WITH ITEM NO. 601
* 44
322-357
DRILL CHUCK 13VLRH-N (W/O CHUCK WRENCH)
322-857 SPINDLE (B)
939-556
RETAINING RING FOR D35 HOLE (10 PCS.)
322-851 DUST SEAL
620-2DD BALL BEARING 6202DDCMPS2L
322-850 RATCHET (A)
984-101 SPRING (A)
959-150 STEEL BALL D6.35 (10 PCS.)
322-845 RATCHET (B)
316-321 TAPPING SCREW (W/FLANGE) D5X45
322-852 WASHER (B)
322-858 SECOND PINION AND GEAR SET
322-841 CHANGE LEVER
2
1
1
1
1
4
1
1
1
1
1
1
1
322-842 CHANGE COVER
322-840 CHANGE SHAFT
322-859 INNER COVER (B)
322-847 SHIFT LEVER ASS’Y
SHIFT LEVER
322-848 SHIFT PIN
306-353 O-RING (S-22)
1
1
1
1
1
1 INCLUD. 20-22
1
981-328 SPRING (H)
319-535 STEEL BALL D3.5 (10 PCS.)
322-844 GEAR COVER (A) ASS’Y
323-048 RETAINING RING (E-TYPE) FOR D15 SHAFT 1
322-849 SHIFT ARM 1
322-860 PIN D5
322-846 GEAR SET
1
1
1
1
1 INCLUD. 11
608-DDM BALL BEARING 608DDC2PS2L 1
939-553 RETAINING RING FOR D22 HOLE (10 PCS.) 1
360-655C ARMATURE 110V 1
360-655E ARMATURE 220V-230V
360-655F ARMATURE 240V
322-843 FAN GUIDE
1
1
1
981-824 HEX. HD. TAPPING SCREW D4X45
340-589C STATOR 110V
340-589E STATOR 220V-230V
340-589F STATOR 240V
608-VVM BALL BEARING 608VVC2PS2L
322-861 HOUSING
NAME PLATE
1
1
1
1
1
2
1
301-653 TAPPING SCREW (W/FLANGE) D4X20 (BLACK) 3
322-862 HANDLE COVER 1
322-853 PUSHING BUTTON 1
322-854 SWITCH (1P PILLAR TYPE)
321-630 INTERNAL WIRE (BROWN) 100L
322-517 CHOKE COIL (BROWN) 220V-240V
1
1 FOR SYR, THA, INA, KUW, IND, SIN, HKG
1 FOR ITA, ESP, GBR (230V), NZL, AUS,
322-518 CHOKE COIL (BROWN) 110V
AUT, SAF, CHN
1 FOR GBR (110V)
--- 2 ---
* ALTERNATIVE PARTS
DV 18V
4 -- 04
PARTS
ITEM
NO.
CODE NO.
45
DESCRIPTION
999-041 CARBON BRUSH (1 PAIR)
46
47
* 48
* 49
* 50
* 51
955-203 BRUSH HOLDER
HITACHI LABEL
994-273 NOISE SUPPRESSOR
992-635 EARTH TERMINAL
321-631 INTERNAL WIRE (BLUE) 55L
321-634 CHOKE COIL (BLUE) 110V-240V
* 51
52
53
54
* 55
* 55
* 55
* 55
* 55
* 55
* 55
* 55
* 55
* 55
322-519 CHOKE COIL (BLUE) 110V
984-750 TAPPING SCREW (W/FLANGE) D4X16
937-631 CORD CLIP
953-327 CORD ARMOR D8.8
500-231Z CORD
500-447Z CORD
500-468Z CORD
500-409Z CORD
500-423Z CORD
500-435Z CORD
500-461Z CORD
500-439Z CORD
500-468Z CORD
500-409Z CORD
NO.
USED
2
REMARKS
2
1
1 FOR GBR (230V), NZL, AUS
1 FOR GBR (230V), NZL, AUS
1 FOR SYR, THA, INA, KUW, IND, SIN, HKG
1 FOR ITA, ESP, GBR (230V), NZL, AUS,
AUT, SAF, CHN
1 FOR GBR (110V)
2
1
1
1 (CORD ARMOR D8.8)
1 (CORD ARMOR D8.8) FOR SYR
1 (CORD ARMOR D8.8) FOR THA
1 (CORD ARMOR D8.8) FOR INA
1 (CORD ARMOR D8.8) FOR KUW, SIN
1
(CORD ARMOR D8.8) FOR GBR (230V), HKG
1 (CORD ARMOR D8.8) FOR GBR (110V)
1 (CORD ARMOR D8.8) FOR NZL, AUS
1 (CORD ARMOR D8.8) FOR CHN
1 (CORD ARMOR D8.8) FOR IND
DV 18V
4 -- 04
* ALTERNATIVE PARTS
--- 3 ---
STANDARD ACCESSORIES
ITEM
NO.
CODE NO.
DESCRIPTION
501 322-706 CASE
502 323-050 SIDE HANDLE
503 303-709 DEPTH GAUGE
NO.
USED
1
1
1
REMARKS
DV 18V
OPTIONAL ACCESSORIES
ITEM
NO.
CODE NO.
DESCRIPTION
601 321-814 DRILL CHUCK 13VLRB-D
602 930-515 CHUCK WRENCH 10G
603 931-851 DRILL BIT (B) D6.5X100
604 931-852 DRILL BIT (B) D8.0X100
605 931-853 DRILL BIT (B) D9.5X120
606 931-854 DRILL BIT (B) D10.0X120
607 971-704 DRILL BIT (B) D12.0X160
608 931-855 DRILL BIT (B) D13.0X160
609 931-776 DRILL BIT (B) D14.3X160
610 971-670 DRILL BIT (B) D16.0X160
611 931-856 DRILL BIT (B) D19.0X160
1
1
1
1
1
1
NO.
USED
1 INCLUD. 602
1
1
1
1
REMARKS
--- 4 ---
* ALTERNATIVE PARTS
Printed in Japan
(040420N)
4 -- 04
advertisement
Key Features
- Compact and lightweight design
- Class-top drilling speed
- Powerful motor
- Shortest chuck offset
- Durable aluminum gear cover and inner cover
- Two-finger sized trigger switch with speed control dial
- Slip clutch mechanism (DV 20VB2 only)
