Makita BTD141 Manual

Models No.
Description
PRODUCT
TECHNICAL INFORMATION
P 1/9
BTD141
Cordless Impact Driver
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
Note: The standard equipment for the tool shown above may differ by country.
Model BTD141 has been developed as a successor model of BTD140.
Additionally to the same advantages as BTD140, Model BTD141 features:
1.5Ah Li-ion battery BL1815 can be used.
One-touch bit installation
Compact hammer case cover
Phosphorescent bumper that glows blue in dark places
See the product variation list above.
Battery
No load speed: min.-1=rpm
Impacts per min.: min.-1=ipm
Max. fastening torque*: N.m (kgf.cm/ in.lbs)
Charging time: min.
Capacities
Electric brake
Reverse switch
Net weight [with BL1815/ BL1830]: kg (lbs)
Variable speed control by trigger
Capacity: Ah
Cell
Voltage: V 18V
0 - 2,300
0 - 3,200
150 (1,530/ 1,330)
Standard bolt
High tensile bolt
Machine screw
Driving shank
M5 - M14 (3/16 - 9/16")
M5 - M12 (3/16 - 1/2")
Coarse thread screw 22 - 125mm (7/8 - 4-7/8")
M4 - M8 (5/32 - 5/16")
Yes
Yes
Yes
1.3/ 1.5 (2.8/ 3.3)
1.5/ 3.0 (battery BL1815/ BL1830)
Li-ion
220
approx. 15/ 22 with DC18RA
6.35mm (1/4") Hex
This product is available in the following variations.
BTD141RFE
BTD141Z
BTD141ZK
BTD141RFE3
BTD141RFEW
BTD141RHE
BTD141RHEW
BL1830
(Li-ion 3.0Ah)
No
DC18RA
No
Model No. type quantity Charger
No
Yes
Belt
clip
1
2
No
Battery
cover
Yes
No
Plastic
carrying case
2
3
2
2
No
BL1815
(Li-ion 1.5Ah)
Battery
Makita-blue
white
Makita-blue
white
Housing
color
1
1
Phillips bits
Socket bits
Bit piece
Li-ion Battery 1830
Li-ion Battery 1815
Fast charger DC18RA
Charger DC24SA (for North America only)
Charger DC24SC (for all countries except North America)
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 145 (5-3/4)
79 (3-1/8)
235 (9-1/4)*2
217 (8-1/2)*1
*1: with Battery BL1815
*2: with Battery BL1830
W
L
H
(with Battery BL1830)
Max output (W)
*Catalog value (torque at 3 seconds after seating, when fastening M14 high tensile bolt)

P 2/9
[2] LUBRICATION
Apply the following lubricants to protect parts and product from unusual abrasion:
*Makita grease N No.2 to the Portions designated with
*Makita grease FA No.2 to the portions designated with
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the battery from the machine for safety before repair/ maintenance
in accordance with the instruction manual!
Fig. 1
Repair
DescriptionCode No.
1R041 Vise Plate Protecting Hammer case, when fixing it with Vise
1R045 Gear Extractor (large) Disassembling Hammer section
1R223 Torque Wrench Shaft 20-90N.m Disassembling Hammer case
1R346 Center Attachment Attaching to 1R045
1R224 Ratchet Head 9.5 Attaching to 1R223, when disassembling Hammer case
1R232 Pipe 30 Supporting Anvil to remove Sleeve easily
1R288 Screwdriver Magnetizer Removing Steel balls
1R291 Retaining Ring S & R Pliers Disassembling Sleeve
134847-1 Socket 30-78 Disassembling Hammer case
134848-9 Socket 32-50 Fixing Bearing box, when removing Hammer case
Use for
Item No. Description Portion to lubricate
Anvil
16 Hammer case complete Sleeve 14 that accepts Anvil
21 Steel ball 3.5 (24 pcs) Whole Portion
25 Steel ball 5.6 (2 pcs) Whole Portion
27 Spindle
27a: Top portion that contacts Anvil
27b: Hole for Armature’s gear
Hammer
Flat washer 24
Cup washer 14
Flat washer 12
Internal gear 51
Bearing box
Armature
Compression spring 24
Makita grease
FA No.2 a little
Makita grease
FA No.2 a little
AmountLubricant
Makita grease
N.No.2 a little
Makita grease
N.No.2 2g

P 3/9
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Disassembling/Assembling Hammer Section
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)
Note:
See Fig. 3 for removal of Hammer case cover
from Hammer case complete.
2) Shift the tail of torsion spring from Carbon brush onto the notch in Brush holder.
Then pull off Receptacle from Brush holder. Carbon brush can now be removed from Brush holder. (Fig. 4)
3) Separate Housing (R) from Housing (L) by removing eight PT3x16 Tapping screws.
4) Remove the assembly of Hammer section and Motor section from Housing (L), then separate Hammer section from
Motor section.
DISASSEMBLING
Rear cover
Tapping screw
PT3x16 (2 pcs)
Hammer case cover
Hammer case complete
Belt clip
Fig. 2
Screw M4x12
Fig. 4
1 2
A[Brush holder section (Viewed from A)]
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.
1. Remove Bumper, then remove the locking claws of
Hammer case cover from the groove of Hammer case
complete.
2. Hammer case cover can separated from
Hammer case complete.
locking claw
Fig. 3
locking claw
Bumper
Hammer case cover Hammer case complete
Hammer case cover
Hammer case complete
Bumper

P 4/9
Repair
[3] -1. Disassembling/Assembling Hammer Section (cont.)
top of cam groove
on Spindle
Steel ball 5.6
6) Install 1R346 on R045, and set them on Hammer mechanism as illustrated in Fig. 6.
Then turn the handle of 1R045 clockwise to lower Hammer to the full.
7) 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 1R288. (Fig. 7)
8) Remove 1R045 by turning the handle counterclockwise.
Fig. 7
Hammer
Spindle
1R346
1R045
Fig. 6
5) Attach a pair of 1R041 to vise. Fix Socket 32-50 in vise securely. Then put Hammer section on Socket 32-50
while fitting the hexagonal portion of Bearing box in Socket 32-50. Fit Socket 30-78 over the hexagonal portion of
Hammer case complete. Then, by turning Socket 30-78 clockwise with 1R223 and 1R224, Hammer section can be
disassembled as illustrated to right in Fig. 5.
Fig. 5
Hammer section
1R223
1R224
Socket 30-78
1R041
Vise
Socket 32-50
1R041 Bearing box
Internal gear 51
O ring 40
Bearing box
Hammer mechanism
Hammer case complete
Hammer case complete
Bit holder section
9) 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.
10) Steel ball 3.5 can now be removed from Hammer. There are twenty-four 3.5 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 3.5 Steel ball.)
Fig. 9
Hammer
Steel ball 3.5
(24 pcs)
space equivalent to
one 3.5 Steel ball
Fig. 8
Hammer
notch for
Steel ball insertion
Fit Socket 30-78 over
this hexagonal portion.

P 5/9
Repair
[3] -1. Disassembling/Assembling Hammer Section (cont.)
Do the reverse of the assembling steps.
Note:
1) Assemble by piling component parts on Bearing box as illustrated in Fig. 10.
2) Make sure that twenty-four 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 with the stepped end of
the gear on Bearing box side. (Fig. 11)
5) Assemble Hammer case complete to Bearing box as described in Fig. 12.
Fig. 12
Fig. 13
Bearing box
Hammer case complete
Socket 32-50
for fixing Bearing box
four projections
Internal gear 51
ASSEMBLING
Fig. 11Fig. 10
Internal gear 51
Bearing box
O ring 40
stepped end
Internal gear 51
O ring 40
Bearing box
Hammer mechanism
Hammer case complete
four grooves on
the inside surface
locking claw
of Hammer case cover
Bumper
depressed portion
locking protrusion
6) When assembling Bumper to Hammer case cover:
1. Match the depressed portions of Bumper to
the locking claws of Hammer case cover.
2. Fit the locking protrusions of Bumper in the
groove on Hammer case complete. (Fig. 13)
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.
groove on
Hammer case complete
Then, using No.1R224, 1R223 and
Socket 30-78, fasten Hammer case complete
to Bearing box by turning counterclockwise
to the recommended torque of 30 - 40 N.m.
Socket 30-78

P 6/9
Repair
[3] -2. Disassembling/Assembling Bit Holder Section
1) Put Anvil on 1R232. (Fig. 14)
2) Press the top of Sleeve with thumb so that Compression spring 13 does not pop out of Sleeve. (Fig. 15)
3) While expanding Ring spring 11 using 1R291. raise the opposite side of Ring spring 11 with index finger. (Fig. 15)
4) Now Bit holder section can be disassembled as illustrated in Fig. 16.
Do the reverse of disassembling steps.
Fig. 14 Fig. 15
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
Hammer Section.)
2) Put the assembly of Yoke unit and Armature
on work bench so that the drive end of the
Armature touches work bench.
Then separate Yoke unit from armature by
pressing it down towards work bench.
(Fig. 17).
DISASSEMBLING
1R232
Anvil
Hammer case complete Sleeve
Ring spring 11
Sleeve
Important:
Do not forget to mount Nylon washer.
(Fig. 16)
Press the top of Sleeve
with thumb.
Raise this side (opposite to the expanded side) with index finger.
Expand Ring spring 11
using 1R291.
Fig. 16
Hammer case complete Nylon washerSleeve
Steel ball 3.5
Anvil
Compression spring 13
Flat washer 12
Yoke unit
Fig. 17

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, Motor section cannot be assembled to Housing (L). (Fig. 18)
2) Because Yoke unit is a strong magnet, when assembling Armature to Yoke unit, be sure to hold Commutator portion
as illustrated to left in Fig. 19. Do not hold Armature core as illustrated to right or your fingers will be pinched
between Yoke unit and Fan of Armature that is pulled strongly by the magnet force of Yoke unit.
Fig. 18 Fig. 19
ASSEMBLING
3) Assemble Motor section and Hammer section
to Housing (L) as described in Figs. 20, 21.
Your fingers can be pinched
and injured.
[Wrong][Correct] [Wrong][Correct]
notch
Fig. 20
notch Housing (L)projection
Hammer
case side
Brush holder complete must be so mounted that
its flat portion is 90 degrees to the edge of Housing (L).
edge of
Housing (L)
Brush holder
complete
Housing (L)
flat portion of
Brush holder complete
Switch
stopper (protrusion)
of Hammer case comp.
Yoke unit
Stopper must face
towards Switch side.
Fig. 21
Fit the projection on Housing (L) in the notch on Yoke unit.
90 degrees
rib
rib
Fit the end surface of Yoke unit to
this rib of Housing (L).
Fit the end surface of Yoke unit to
this rib of Housing (L).

P 8/9
Fig. D-2
[1] Lead Wire of Carbon Brush
As illustrated to left in Fig. D-2, 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. D-2.
(Illustrations in Fig. D-2 is Carbon brush section viewed from A.)
[Correct] [Wrong]
Lead wire of Carbon brush
Lead wire correctly routed
Torsion spring
tail of Torsion spring
tail of Torsion spring
Circuit diagram
Color index of lead wires' sheath
Black
White
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.
Lead wire routed
wrong may interfere
the tail of Torsion
spring.
Fig. D-1

P 9/9
Fig. D-3
[2] Wiring in Housing
Wiring diagram
Put Light circuit in place
so that the orange Lead wire
faces toward the Terminal side.
rib
Terminal side
Switch side
Lead wire
(orange)
With these lead wire holders,
fix the lead wires connected
to each connector.
20 °
[2] -2. Other Lead Wires
Connector
LED
LED
Assemble each Connecting
terminal to Switch at approx.
20 degrees to the vertical.
Switch
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)
[2] -1. Lead Wires of LED
Lead wire holder
Light circuit
Fit the corner of LED in this
corresponding corner of Housing (L).
As illustrated below, fix the two Lead wires (black, white) of LED
with Lead wire holders, and route them between the pin and the boss.
Connector (large)
Connector (small)
Lead wire holder
Brush holder complete
Light circuit
Lead wire holder
pin
boss
Do not cross the lead wires of LED here.
Be sure that Lead wires
of LED are tight in this area.
pin
The lead wire (blue) from
Connector to Switch has to
be routed inside of this pin.
Terminal