ECHNICAL INFORMATION
PRODUCT
P 1/ 15
T
BTW074, BTW104
L
Models No.
Description
Cordless Impact Wrench
CONCEPT AND MAIN APPLICATIONS
H
These cordless impact wrenches for manufacturing industry as
the successors of BTW072 series models.
Their main features are:
• Extra compact design with a short overall length of 144mm (5-5/8")*1
• Powered by our new 14.4V Li-ion batteries with battery fuel gauge:
BL1415NA (1.5Ah)/ BL1415NP (1.5Ah)/
BL1430A (3.0Ah)/ BL1430AP (3.0Ah)
• Automatic impact stop system to avoid under-tightening and
over-tightening
W
(The image above is Model BTW074.)
Dimensions: mm (")
Length (L)
Width (W)
144 (5-5/8)*1
• Torque stabilization system to stabilize the torque of each fastening
• Automatic battery shut-off system to avoid incomplete fastenings
74 (2-15/16)
Height (H) 216 (8-1/2)*1/ 234 (9-1/4)*2
*1 149mm (5-7/8”) for Anti-wobble anvil version
*2 with 1.5Ah Li-ion battery BL1415NA
*3 with 3.0Ah Li-ion battery of BL1430A
Specification
Model No.
BTW074
BTW104
Cell
Li-ion
14.4
Voltage: V
Battery
Capacity: Ah
Energy capacity: Wh
Charging time (approx.): min.
1.5/ 3.0
22/ 44
15/ 22 with DC18RC
140 150
Max output (W)
Driving shank
9.5mm (3/8") Square drive
M5 - M12 (3/16 - 1/2")
M5 - M10 (3/16 - 3/8")
0 - 3,500
Standard bolt
High tensile bolt
Capacities
Impacts per min.: min.ˉ¹=ipm
No load speed: min.ˉ¹=rpm
Max. fastening torque: N.m [kgf·cm] (in.lbs)
Battery fuel gauge*6
0 - 2,500
65 [660] (575)*4
0 - 2,700
95 [970] (841)*5
Yes
Yes
Automatic battery shut-off system
Electric brake
Yes
LED job light
Yes
Variable speed control by trigger
Reverse switch
Yes
Yes
Weight according to
EPTA-Procedure 01/2003*7: kg (lbs)
1.1/ 1.3
(2.4/ 2.9)
*4 The fastening torque at 3 seconds after seating, when fastening M10 (grade 10.9) high tensile bolt.
*5 The fastening torque at 3 seconds after seating, when fastening M12 (grade 10.9) high tensile bolt.
*6 located on battery BL1415NA/ BL1415NAP/ BL1430A/ BL1430AP, not on the tool body
*7 with battery
Standard equipment
No
Optional accessories
Li-ion Battery BL1415NA
Li-ion Battery BL1415NAP
Li-ion Battery BL1430A
Li-ion Battery BL1430AP
Battery protector
Charger DC24SC
Automotive charger DC18SE
Fast charger DC18RA (for USA, Canada, Guam, Panama, Mexico, Colombia)
Fast charger DC18RC (for all countries except the countries above)
Protectors (blue/ white/ red)
Charger DC18SD
Automatic refreshing adapter ADP03
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P 3/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Note for Assembly/Disassembly
The models can be distinguished depending on the max. fastening torque. See Fig. 2.
Fig. 2
Max. fastening torque
Model No.
Distinctive Parts
ø39
Hammer B
Compression spring
(orange)
BTW073
BTW074
65 N.m
ID plate
(white)
BTD063: Cover complete
(white)
BTD064: Switch plate complete
(white)
Hammer C
Compression spring
(green)
BTW103
BTW104
95 N.m
ID plate
(red)
BTD103: Cover complete
(red)
BTD104: Switch plate complete
(red)
When repairing the products, be sure to assemble Hammer, Compression spring and Switch plate complete or
Cover complete as shown in Fig.2.
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P 4/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Armature
DISASSEMBLING
(1) Remove Armature section from Housing set as drawn in Fig. 3, and remove Brush holder from Armature in Fig. 4.
Fig. 3
1. Loosen four M4x22 Pan head screws and separate
Hammer case complete from Housing set.
2. Loosen two M3x12 Pan head screws and
separate Rear cover from Housing set.
Hammer case complete
Rear cover
M4x22
Pan head screw
(4 pcs.)
Hammer case
complete
M3x12
Pan head screw
3. Loosen seven M3x20 Pan head screws and
separate Housing set (R) from Housing set (L).
4. Take out Brush holder and Motor section
(Armature and Yoke unit) together with
Internal gear case from Housing set (L).
M3x20
Pan head screw
Housing set (R)
(7 pcs.)
Motor section
Brush holder
Internal gear case
Housing set (L)
Fig. 4
2. Take out Carbon brushes.
Then, disassemble
Armature and Yoke unit
from Brush holder.
1. Shift the tail of Torsion spring
from the top of Carbon brush to
the notch of Brush holder.
Then, Carbon brush is free from
the pressure of Torsion spring.
Tail of
Torsion spring
Carbon brush
Carbon
Brush
Torsion
Spring
Tail of
Torsion Spring
Notch
Carbon
Brush
Carbon
Brush
Armature
Notch
Yoke unit
Brush holder
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P 5/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Armature (cont.)
DISASSEMBLING
(1) Remove Armature as drawn in Fig. 5.
Fig. 5
1. Remove Internal gear case
from Motor section.
2. Remove Armature
from Yoke unit.
Armature
Internal gear case
Motor section
Yoke unit
ASSEMBLING
(1) Insert Armature into Yoke unit so as not to damage the wiring of Armature and not to be pinched your fingers
between yoke unit and Armature fan. And insert the drive end of Armature into Internal gear case as drawn in Fig. 6.
Fig. 6
1. Hold Yoke unit on workbench and
slowly insert Armature into Yoke unit
until the drive end reaches workbench.
2. When the drive end
of Armature reaches
worktable, lift up Yoke
unit slowly.
3. Insert the drive end of Armature
into Internal gear case. And insert
the commutator end of Armature
into Brush holder.
Internal gear case
Brush holder
Notch
Yoke unit
Note: Set Yoke unit with its Notch
facing to the workbench side.
(2) Assemble Motor section (Armature, Yoke unit ), Internal gear case and Brush holder as drawn in Fig. 7.
Fig. 7
Assemble Internal gear case, Yoke unit, Armature and Brush holder to Housing set (L) by the following points.
* setting the slip stopper of Internal gear case to the box portion of Housing set (L)
* setting the notch of Yoke unit to the projection of Housing set
Slip stopper of
Box portion for Slip
Internal gear case
stopper of Internal gear case
Projection for
Notch of Yoke unit
Notch of
Yoke unit
Brush holder
Housing set (L)
Motor section
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P 6/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Armature (cont.)
ASSEMBLING
(3) Assemble Motor section (Armature, Yoke unit ), Internal gear case and Brush holder to Housing set (L) as drawn
in Fig. 8.
Fig. 8
Yoke unit
Rib
Housing Set (L)
Mark
90°
The edge of Yoke unit
has to be set inside of
the rib.
The flat surface of Brush
holder complete has to be
mounted perpendicularly.
The marking on Yoke
unit should be facing
upward.
(4) Mount Pig tails and Spacers as drawn in Fig. 9.
Fig. 9
Pig tails
1. Spacer has to be set inside
the housing wall.
projection
Spacer
Note: Make sure that the loosening of
Pig tail is within 9 mm from
the edge of Brush holder.
9mm
2. Aligning this groove with
the projection of Brush holder,
push Spacer toward Armature
until it stops.
(5) Assemble F/R change lever as drawn in Fig. 10.
Fig. 10
1. Set F/R change lever to Switch with aligning
the prong portion with the projection.
2. Assemble Switch with F/R change lever
to Housing set (L).
Prong portion of
F/R change lever
Projection
of Switch
(6) Be sure to assemble ID plate and Cover complete or Switch plate complete to Housing set (L) in accordance with
[3] -1. Note for Assembly/Disassembly and the drawings in Fig. 2. And then, assemble Housing set (R).
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P 7/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Ball bearing 6801LLB in Internal gear case
DISASSEMBLING
(1) Disassemble Brush holder and Motor section together with Internal gear case as drawn in Fig. 3.
(2) Remove Internal gear case from Armature as drawn on the left in Fig. 5.
(3) Remove Ball bearing 6801LLB from Internal gear case as drawn in Fig. 11.
Fig. 11
Tap Internal gear case on the workbench to remove Ball bearing 6801LLB from the gear case.
Internal gear case
Ball bearing 6801LLB
Note: Should be tapped perpendicularly.
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P 8/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Bit holder section, Anvil
DISASSEMBLING
(1) Loosen four M4x22 Pan head screws and separate Hammer case complete from Housing set.
See the drawing on the upper left in Fig. 3.
(2) Remove Ring spring 7 as drawn in Fig. 12. And then, remove Anvil as drawn in Fig. 13.
*For Anvil without Ring spring 7, Anvil can be removed as drawn in Fig. 13 skipping Fig. 12.
Fig. 12
Use 1R232 for stabilizing Anvil in the position
where Ring spring 7 can be removed easily.
Remove Ring spring 7 with 1R004.
Ring spring 7
Ring spring 7
Anvil
1R004
Anvil
1R232
Fig. 13
Nylon Washer 14
Anvil and Nylon washer 14 are removed from
Hammer case complete.
Hammer Case Complete
Anvil
ASSEMBLING
(1) Pass Anvil through Nylon Washer 14 and mount them to Hammer case complete. Refer to Fig. 13.
*For Anvil without Ring spring 7, Hammer case section can be assembled to Housing set. Refer to Fig. 3.
(2) To stabilize Anvil in the position where Ring spring 7 can be assembled easily, set Hammer case complete
on 1R232. Refer to the drawing on the left in Fig. 12.
(3) Assemble Ring spring 7 as drawn in Fig. 14.
Fig. 14
3. For final adjustment, repeatedly
attach and detach a 9.5 mm square
socket such as 1R222 to/from Anvil
to fit Ring spring 7 into the groove
on Anvil.
1. Aligning the cut of Ring
spring 7 with the groove
on Anvil, push the opposite
side of the cut portion
with pliers.
2. The mounted Ring
spring 7 is widened
by just fitting it.
So fasten it with pliers
as shown below.
Ring spring 7
9.5 mm
1R222
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P 9/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -5. Hammer section
DISASSEMBLING
(1) Loosen four M4x22 Pan head screws and separate Hammer case complete from Housing set.
See the drawing on the upper left in Fig. 3.
(2) Remove Hammer section from Housing set. See Fig. 15.
Fig. 15
Hammer section
(3) Take out Steel ball 5.6 with 1R045 as drawn in Fig. 16.
Fig. 16
2. Hold Hammer section as shown below in Fig. 16R,
and then release it from 1R045.
Caution: Do not hold Hammer section as shown below
in Fig. 16F when releasing Hammer section
from 1R045. Failure to follow this instruction
could cause Steel balls 3.5 to fall out from it.
1. Pull Hammer downwards using 1R045
to align the opening for Steel ball insertion
with the top of the cam grooving on Spindle,
and then remove Steel balls 5.6 from Spindle.
Steel Ball 5.6
(2pcs.)
Fig. 16R
Fig. 16F
Top of
Cam groove
on Spindle
Spindle
Hammer
Opening for
Steel ball
insertion
1R045
Handle
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P 10/ 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -5. Hammer section (cont.)
DISASSEMBLING
(4) Disassemble Hammer section as drawn in Fig. 17.
Fig. 17
Compression spring 26
Cup washer 14
Hammer
Steel ball 3.5 (24 pcs.)
Flat washer 24
Spindle
ASSEMBLING
Assemble Hammer section by reversing the disassembly procedure. (Refer to Fig. 17)
Note for Assembling:
Before putting Flat washer 24 in Hammer, make sure that twenty-four Steel balls 3.5 are put in the groove of Hammer
as shown in Fig. 18.
Fig. 18
Hammer and Steel balls 3.5,
viewed from above
Hammer
There will appear a space equivalent to
one Steel ball 3.5 in the groove of Hammer
when twenty-four Steel balls 3.5 are put
in place.
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P 11/ 15
Circuit diagram
BTW073, BTW103
Fig. D-1
(without Automatic Impact Stop System)
Color index of lead wires' sheath
Yellow
Black
Red
Brush holder
Line filter*
LED Circuit
LED
Brush holder complete
Switch
Connector
Connector
Terminal
*Line filter is not used for some countries.
Wiring diagram
BTW073, BTW103
(without Automatic Impact Stop System)
Fig. D-2
Wiring to M1 Terminal of Switch
Wiring to M2 Terminal of Switch
2. Bend the Terminal 90º
toward M2 Terminal side
so that Line filter can be
placed on Switch.
1. Secure Insulated terminal to
M1 Terminal with a screw
as shown below.
Secure Insulated terminal to M2 Terminal
tilting approx. 30º±5º as shown below.
30°±5º
M1
M1
M1
M2
M2
Viewed from
Housing set (L) side
Viewed from
Rear side
Viewed from
Housing set (R) side
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P 12/ 15
Wiring diagram
BTW073, BTW103
(without Automatic Impact Stop System)
Fig. D-3
Wiring of LED Lead Wire (before setting Switch)
Route Lead wires (black, red) between
Rib A and the inner wall of Housing set (L).
LED
Route lead wires (black, red) between Rib A
and Rib B so that they are not pinched
with Switch.
Rib A
Route Lead wires (black, red) between Rib B
and the inner wall of Housing set (L).
Rib C
Rib B
Rib D
If Connectors are put in Connector box A, route
Lead wires (black, red) through Connector box A
and secure them with Lead wire holder A .
Lead wire holder A
Connectors in Connector Box A
Connectors in
Connector box B
Connectors can be also routed
through Connector box B.
In this case, Lead wires
have to be secured with Lead
wire holder B.
Lead wire
holder B
Wiring in Housing set (L) (after setting Switch)
Be careful not to route
any Lead wires on this Rib.
Rib F
LED
Rib E
Line filter
Switch
Place Line filter between Rib E and Rib F.
Note for Wiring:
Route Lead wires connected to Switch
between Boss and the inner wall of
Housing set (L).
If Line filter interferes with Housing set (R)
in assembling, check that Insulated terminal
is tilted enough to save the space for Line
filter referring to Fig. D-2.
Boss
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P 13/ 15
Circuit diagram
BTW074, BTW104
(equipped with Automatic Impact Stop System)
Fig. D-4
Color index of lead wires' sheath
Orange
Gray
White
Black
Blue
Green
Yellow
Red
LED Circuit
(Warning of Power Reduce)
LED Light
Circuit
LED Warning
Light
Brush holder
Line filter*
Connector
(4 pin)
Brush holder complete
Switch
Connector
(6 pin)
Controller
Terminal
*Line filter is not used for some countries.
Wiring diagram
BTW074, BTW104
(equipped with Automatic Impact Stop System)
Fig. D-5
Wiring to M1 Terminal of Switch
Wiring to M2 Terminal of Switch
2. Bend the Terminal 90º
1. Secure Insulated terminal to
M1 Terminal with a screw
as shown below.
Secure Insulated terminal to M2 Terminal
tilting approx. 30º±5º as shown below.
toward M2 Terminal side
so that Line filter can be
placed on Switch.
30°±5º
M1
M1
M1
M2
M2
Viewed from
Housing set (L) side
Viewed from
Rear side
Viewed from
Housing set (R) side
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P 14/ 15
Wiring diagram
BTW074, BTW104
(equipped with Automatic Impact Stop System)
Fig. D-6
Wiring of LED Lead Wire (before setting Switch)
Route Lead wires (black, red) between
Rib A and the inner wall of Housing set (L).
Rib F
LED
Route lead wires (black, red) between
Rib A and Rib B so that they are not pinched
with Switch.
Rib A
Rib B
Route Lead wires (black, red) between Rib B
and the inner wall of Housing set (L).
Rib C
Boss
Connector (6 pin) for
connecting to Switch
Route Lead wires (black, red) between
the following Ribs.
* Rib of the Boss for Screw hole
* Rib of the Connector box
Connector (4 pin) for
connecting to
LED Warning Light
Rib D
Connector box
Wiring of Lead wire of LED Warning Lamp (before setting Switch)
LED warning lamp
Rib F
Route the bundle of Lead wires (blue,
LED
black, red and gray) between Rib A
and the inner wall of Housing set (L).
Rib A
Rib B
Route the bundle of Lead wires (blue,
black, red and gray) between Rib B
and the inner wall of Housing set (L).
Rib C
Connector 6 pin for
connecting to Switch
Route Lead wires (blue, red and gray)
of LED Warning lamp and the
connecting Lead wire (black) between
Rib C and Rib D.
Rib D
Boss
Secure Lead wires of both Connectors
(4 pin) with Lead wire holders.
Connector
(4 pin)
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P 15/ 15
Wiring diagram
BTW074, BTW104
(equipped with Automatic Impact Stop System)
Fig. D-7
Wiring in Housing set (L) (after setting Switch)
Be careful not to route
any Lead wires on this Rib.
Rib E
Rib F
Line filter
Route Lead wires of
LED warning lamp
between the Ribs.
Route Line filter
between Ribs E and F.
LED light
LED warning lamp
Note for Wiring:
If Line filter interferes with Housing set (R)
in assembling, check that Insulated terminal
is tilted enough to save the space for Line
filter referring to Fig. D-5.
Switch
Route Lead wires for connecting
to Switch between Boss and
the inner wall of Housing set (L).
Be careful not to route
any Lead wires on this Rib.
Boss
Secure lead wires of
both Connectors (6 pin)
with Lead wire holders.
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