Makita BTD140 Manual

Models No.
Description
PRODUCT
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
P 1 / 9
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 146 (5-3/4)
79 (3-1/8)
235 (9-1/4)
Note: The standard equipment for the tool shown above may differ by country.
BTD140
Cordless Impact Driver
Model BTD140 has been developed as the 18V version of the current 14.4V Cordless
impact driver Model BTD130F.
18V battery delivers powerful 220W maximum output, yet still extra-lightweight design
has been achieved by using 4-pole motor and Lithium-ion battery as power unit.
Features the same advantages as BTD130F as follows:
High operation efficiency
Hammer case without protrusion
Job light with afterglow function
Belt clip
Belt clip ................................... 1
Plastic carrying case ................ 1
Assorted Phillips bits
Assorted socket bits
Bit piece
Charger DC18SC
Charger DC24SA
Charger DC24SC
Li-ion Battery 1830
This new product will be available in the following variations.
BTD140SFE
BTD140 BL1830
(Li-ion 3.0Ah) DC18SC
Model No. type quantity Charger Offered to
USA, Canada
Mexico, Panama
All countries except
those listed above
2
Battery
Battery
No load speed: min.-1=rpm
Impacts per min.: min.-1=bpm
Max. fastening torque: N.m (in.lbs)
Capacities
Electric Brake
Reversing switch
Net weight*: kg (lbs)
Variable speed (electric)
Capacity: Ah
Cell
Voltage: V 18
0 - 2,300
0 - 3,200
145 (1,280)
Standard bolt
High tensile bolt
Machine screw
Driving shank
M5 - M14 (3/16 - 9/16")
M5 - M12 (3/16 - 15/32")
Coarse thread screw 22 - 125mm (7/8 - 4-7/8")
M4 - M8 (5/32 - 5/16")
Yes
Yes
Yes
1.5 (3.3)
3.0
Li-ion
220
6.35mm (1/4") Hex
*Includes battery BL1830
Max output (W)

P 2 / 9
Repair
[2] LUBRICATION
Apply Makita grease N. No.2 to the following portions designated with the black triangle to protect
parts and product from unusual abrasion.
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the battery from the machine for safety before repair/ maintenance !
Code No.
1R045
Description
Gear extractor (Large) Disassembling Hammer mechanism
Turning Hammer case
Magnetizing screwdriver for removing Steel balls
1R346 Center attachment for 1R045
Disassembling Bit holder mechanism
Fixing Hammer case
1R288 Screwdriver magnetizer
1R232 Pipe 30
1R291 Retaining ring S and R pliers
1R041 Vise plate
1R223 Torque wrench shaft
1R224 Ratchet head
134847-1 Socket 30-78
Socket 32-50 Fixing Hammer case 134848-9
Use for
Fig. 1
20 Hammer case complete Inside surface where twenty-four 3.5 Steel balls are installed
Whole surface
Gear teeth
Gear teeth that engages with Spur gear 22 (Apply approx. 2g.)
25 Steel ball 5.6
26 Spur gear 22
27 Spindle Cam groove top
Surface that contacts Spur gear 22
28 Pin 5
30 Internal gear 51
Item No. Part description
Where to lubricate
when disassembling Hammer mechanism
Steel ball 3.5 (24 pcs) Compression spring 24
Flat washer 24
Cup washer 14

P 3 / 9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Disassembling/Assembling Hammering Mechanism
Fig. 3
1) Remove Belt clip by unscrewing Screw M4x12.
After removing Bumper and Hammer case cover
by hand, then remove Rear cover by unscrewing
two PT3x16 Tapping screws. (Fig. 2)
2) Shift the tail of torsion spring from Carbon brush
onto the notch in Brush holder.
Then pull off Receptacle from Brush holder.
Now Carbon brush can be removed from Brush
holder. (Fig. 3)
3) Separate Housing (R) from Housing (L) by removing eight PT3x16 Tapping screws.
4) Remove the assembly of the Hammer case section and the Motor section from Housing (L), then separate the Hammer
case from the Motor section.
5) Attach a pair of Vise plate (No.1R041) to vise. Fix Socket 32-50 in vise securely. Then put the Hammer case section
on Socket 32-50 while fitting the hexagonal portion of Bearing box in Socket 32-50. Fit Socket 30-78 over the hex-
agonal portion of Hammer case. Then, by turning Socket 30-78 with Torque wrench shaft 20-90N.m (No.1R223) and
Ratchet head with 12.7mm square (No.1R224) clockwise, the Hammer case section can be disassembled. (Fig. 4)
1 2
A[Brush holder section (View from A)]
Fig. 4
DISASSEMBLING
Rear cover
Tapping screw
PT3x16 (2 pcs)
Hammer case cover
Hammer caseBumper
Belt clip
Fig. 2
Screw M4x12
Carbon
brush
Carbon
brush
Torsion
spring
1. Shift the tail of Torsion spring
onto the notch of Brush holder.
2. Then pull off Receptacle from
Brush holder.
Hammer case
No.1R223
No.1R224
Socket 30-78
Fit socket 30-78 over
this hex portion.
Vise plate
Vise
Socket 32-50
Vise plate
Bearing box
Internal gear 51
O ring 40
Bearing box
Hammering mechanism
Hammer case

P 4 / 9
Repair
[3] -1. Disassembling/Assembling Hammering Mechanism (cont.)
Hammer
Spindle
No.1R346
No.1R045
Top of Cam groove
on Spindle
Notch for
Steel ball insertion
Steel ball 5.6
6) Install Center Attachment (No.1R346) on Gear Extractor, large (1R045).
(Fig. 5)
7) Set the Gear Extractor on the Hammering mechanism (= assembled unit of
Hammer, Spindle, Spur gears, Steel balls, etc.) as illustrated in Fig. 6.
Then turn the handle of the Gear Extractor clockwise to lower Hammer to
the full.
8) Align the notch in Hammer with the top of the cam groove on Spindle.
Then take steel ball 5.6 (2 pcs) out of spindle using tweezers or a slotted
screwdriver magnetized with Screwdriver Magnetizer (No.1R288). (Fig. 7)
9) Remove the Gear Extractor by turning the handle counterclockwise.
10) Remove Spindle, Compression spring 45 and Cup washer 14 from Hammer as illustrated in Fig. 8.
Important: Be sure to lower the Hammer side so that Steel balls in Hammer cannot fall down and scatter.
11) Now Steel ball 3.5 can removed from Hammer. There are 26 steel balls in the groove on the inside of Hammer.
(As illustrated in Fig. 9, the groove is designed to have a space equivalent to one steel ball.)
Fig. 5
1R045
1R346
Fig. 6 Fig. 7
Fig. 9
Hammer
Steel ball 3.5
(26 pcs)
space equivalent to
one steel ball
Fig. 8
Hammer

P 5 / 9
Repair
[3] -1. Disassembling/Assembling Hammering Mechanism (cont.)
Do the reverse of assembling steps.
Note:
1) Assemble by piling component parts on Bearing box as illustrated in Fig. 10.
2) Make sure that twenty-six 3.5 Steel balls are in place inside Hammer.
3) Do not forget to install O ring 40 when assembling Internal gear 51 to Bearing box. (Fig. 11)
4) Internal gear 51 is not reversible when assembled to Bearing box. Be sure to assemble so that the stepped end of
the gear face Bearing box. (Fig. 11)
5) Assemble Hammer case complete to Bearing box as illustrated in Fig. 12.
Fig. 12
Bearing box
Hammer case complete
Socket 32-50 for fixing Bearing box
four projections
Internal gear 51
ASSEMBLING
Fig. 11Fig. 10
Internal gear 51
O ring 40
Bearing box
Hammering mechanism
Hammer case
Fit Hammer case complete over Internal gear 51 with
the four grooves on the inside of Hammer case complete
aligned with the corresponding projections on Internal gear 51.
Then, using No.1R224 and No.1R223,
fasten Hammer case complete to
Bearing box by turning counterclockwise
to the recommended torque of 30 - 40 N.m.
four grooves on
the inside surface
Internal gear 51
Bearing box
O ring 40
stepped end

P 6 / 9
Repair
[3] -2. Disassembling/Assembling Bit Holder Section
1) Put Anvil on Pipe 30 (No.1R232). (Fig. 13)
2) Put your thumb on the top of Sleeve so that Compression spring 13 does not pop out of Sleeve. (Fig. 14)
3) While expanding Ring spring 11 using Retaining ring S and R pliers (No.1R291). raise the opposite side of the Ring
spring with index finger. (Fig. 14)
4) Now the bit holder section can be disassembled as illustrated in Fig. 15.
Do the reverse of disassembling steps.
Fig. 13 Fig. 14
ASSEMBLING
DISASSEMBLING
[3] -3. Disassembling/Assembling Motor Section
1) Separate the assembly of Armature and Yoke
unit from the machine.
(Refer to 1) to 4) of [3] -1. Disassembling
Hammering Mechanism.)
2) Put the assembly of Yoke unit and Armature
on a work bench so that the drive end of the
Armature touches the work bench.
Then separate Yoke unit from armature by
pressing it down towards the work bench.
(Fig. 16).
DISASSEMBLING
No.1R232
Anvil
Hammer case
Sleeve
Ring spring 11
Sleeve
Important:
Do not forget to mount Nylon washer. (Fig. 15)
Put your thumb on
the top of Sleeve.
Raise this side
with index finger.
Expand Ring spring 11
using No.1R291.
Fig. 15
Hammer case Nylon washerSleeve
Steel ball 3.5
Anvil
Compression spring 13
Flat washer 12
Yoke unit
Fig. 16

P 7/ 9
Repair
[3] -3. Disassembling/Assembling Motor Section (cont.)
Do the reverse of disassembling steps.
Important:
1) Yoke unit is not reversible when assembled to Armature. Be sure to assemble so that the notch in Yoke unit is positioned
on the drive-end of Armature. If assembled wrong, the Motor section cannot be assembled to Housing (L). (Fig. 17)
2) Because Yoke unit is a strong magnet, when assembling Armature to Yoke unit, be sure to hold the commutator portion
as illustrated to left in Fig. 18. Do not hold the Armature core as illustrated to right or your fingers will be pinched
between Yoke unit and the fan of Armature that is pulled strongly by the magnet force.
Fig. 17 Fig. 18
ASSEMBLING
3) When assembling the Motor section to Housing (L),
fit the notch in Yoke unit onto the projection on
Housing (L) (Fig. 19)
Your fingers can be pinched
and injured.
[Wrong][Correct] [Wrong][Correct]
Notch
Fig. 19
Notch Housing (L)Projection
Hammer
case side

P 8/ 9
Fig. 20
[1] Lead Wire of Carbon Brush
As illustrated to left in Fig. 20, put each Carbon brush into
Brush holder so that its lead wire is placed outside.
Then route the lead wire of Carbon brush through the
outside slot in Brush holder as illustrated to left in Fig. 20.
(Illustrations in Fig. 20 is the Carbon brush section viewed from A.)
[Correct] [Wrong]
Lead wire of Carbon brush
The lead wire correcltly routed
Torsion spring
Tail of torsion spring
Tail of torsion spring
Circuit diagram
Color index of lead wires' sheath
Black
Red
Orange
Blue
LED
Light circuit
Switch
Brush holder
complete
Terminal
Connector
Wiring diagram
A
Route the lead wire of
Carbon brush through this
outside slot in Brush holder.
The lead wire routed
wrong may interfere
the tail of Torsion
spring.

P 9/ 9
Fig. 21
[2] Wiring in Housing
Wiring diagram
Brush holder complete
Put Light circuit in place
so that the orange lead wire
faces toward the Terminal side.
[2] -1. Lead Wires of LED
Connector
Light circuit
lead wire holder
lead wire holder
LED
Be sure that the lead wires
of LED are tight here.
As illustrated below, fix the two lead wires (red and black) of LED
with lead wire holders, and route them between the pin and the boss.
pin
boss
Fit the corner of LED in this
corresponding corner of Housing (L).
LED
Connector (large)
Connector (small)
Light circuit
rib Terminal side
Switch side
Do not cross the lead wires of LED here.
Lead wire
(orange)
pin
lead wire holder
With these lead wire holders,
fix the lead wires connected
to each connector.
20 °
[2] -2. Other Lead Wires
Assemble each Connecting
terminal to Switch at approx.
20 degrees to the vertical.
Switch
The lead wire (blue) from
Connector to Switch has to
be routed inside of this pin.
Put the following lead wires
between the rib and Light circuit.
*Lead wires (red and black) from
Terminal to Connector (small)
*Lead wire (blue) from Switch
to Connector (small)