Makita BTD123F Manual

Models No.
Description
NEW TOOL
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
P 1 / 7
< Note > The standard equipment for the tool shown may differ from country to country.
BTD123F
Cordless Impact Driver
Model BTD123F has been added to the MAKSTAR series models.
The brief features of the new 12V impact driver are;
*Compact design with an overall length of only 163mm (6-3/8")
*Extra-lightweight with the newly designed, compact and light
12V batteries, BH1220C or BH1233C
*Screw hole protrusions have been eliminated from hammer case
for increased maneuverability, allowing operator not to worry
about making scratches on workpiece with the tool.
This new product is available in the following variations.
Battery
No load speed: min.-1=rpm.
Impacts per min.: min.-1=bpm.
Max. fastening torque: N.m (kgf.cm/in.lbs)
Charging time: min.
Capacities
Electric Brake
Reversing switch
*Plastic carrying case .................................... 1 pc.
*Phillips bit 2-65............................................ 1 pc.
*Assorted Phillips bit, Socket bits and Drill chucks
*Bit piece
*Stopper assembly
*Batteries BH1220C, BH1233C, BH1220, BH1233
*Charger DC14SA, DC14SC, DC24SA
w/ 2.0 Ah battery
w/ 3.3 Ah battery
Net weight: kg (lbs)
Variable speed (electric)
Capacity: Ah
Cell
2.0Ah battery
3.3Ah battery
Voltage: V 12V
0 - 2,600
0 - 3,200
125 (1,270/1,110)
Standard bolt
High tensile bolt
Machine screw
M5 - M12 (3/16 - 15/32")
M5 - M10 (3/16 - 3/8")
Coarse thread screw 22 - 120mm (7/8 - 3-3/4")
M4 - M8 (5/32 - 5/16")
Yes
Yes
Yes
1.4 (3.1)
1.6 (3.5)
2.0 (battery BH1220C) / 3.3 (battery BH1233C)
Ni-MH
approx. 30 with DC14SC
approx. 50 with DC14SC
Dimensions: mm ( " )
Width ( W )
Height ( H )
w/ BH1220C
Length ( L ) 163 (6-3/8)
82 (3-1/4)
226 (8-7/8)
w/ BH1233C
234 (9-1/4)
L
H
W
BTD123FSJE
BTD123FSAE Ni-MH
BH1220C (2.0Ah)/ 2pcs
Ni-MH
BH1233C (3.3Ah)/ 2pcs
Model No. Battery Charger
DC14SC
DC14SC
Plastic
carrying case
Yes
BTD123FZ No No No
Yes

P 2 / 7
Repair
(1) Remove Ring spring from the groove on Anvil with retaining pliers or the like.
(2) Now Flat washer, Compression spring 13, Sleeve and Steel ball 3.5 (2pcs) can be removed from Anvil.
(3) Remove Anvil from Hammer case.
(1) Pull LED circuit out of housing by removing PT3x10 Tapping screw. ( Fig. 2)
(2) Remove stopper by removing PT3x16 Tapping screw. (Fig. 2)
(3) Remove bumper from hammer case. (Fig.3)
(4) Fit socket 30-78 (Part No.134847-1) over the hex
portion of hammer case.
And then remove hammer case from housing by
turning the socket clockwise as illustrated in Fig. 4.
Ring spring groove
Compression spring 13 Steel ball 3.5 (2pcs)
Flat washer Sleeve Anvil
Fig. 1
Fig. 2
Fig. 4
Apply Makita grease N.No.2 to the
cylindrical portion of anvil before mounting.
[2] Removing Hammer Case Complete
[1] Disassembling Sleeve Section (Fig. 1)
DISASSEMBLING
LED circuit
Tapping screw
PT3x10
Tapping screw
PT3 x 16
Stopper
Fig. 3
Hammer case
Hex portion
of hammer case
Socket 30-78
(134847-1)
Bumper

P 3 / 7
Repair
(1) After removing Brush holder caps and Carbon brushes, remove Hammer section, Ring 41 and Internal gear 51
from Housing. (Fig. 5)
(2) Separate Internal gear case from Housing by removing four M4x12 Pan head screws. (Fig. 6)
(3) Remove eight PT3x16 Tapping screws. Now Housing (R) can be separated from Housing (L).
(1) Press down Hammer using Large gear extractor (1R045)
to align the opening for Steel ball insertion with the top
of cam groove on Spindle. And then remove Steel ball
5.6 (2pcs) from Spindle. (Fig. 7)
(2) Hold Hammer section as illustrated in Fig. 8, and release
it from the gear extractor.
Caution: Do not hold gear extractor as illustrated in Fig. 7
when releasing Hammer section from the gear extractor.
Failure to follow this instruction could cause Steel balls
3.5 to get out of hammer.
(3) Now Hammer section can be disassembled as illustrated
in Fig. 9
(4) After removal of Flat washer 24, Steel balls 3.5 can be
removed from Hammer. (Fig. 10)
*See next page for lubrication of Spindle section.
[3] Disassembling Housing
[4] Disassembling Hammer and Spindle Section
Fig. 5 Fig. 6
Fig. 8 Fig. 10Fig. 9
Fig. 7
Pan head screw M4x12
Internal gear case
Hammer section
Ring 41
Internal gear 51
Brush holder cap Housing
Carbon brush
Spindle
Top of
Cam groove
on Spindle
Opening for
Steel ball
insertion
Hammer
Spur gear 22
Flat washer 12
Pin 5
Hammer
Hammer
Compression
spring 25
Cup
washer 14
Steel ball 3.5
(24 pcs.)
Spindle
Flat washer 24
Spindle section
Steel ball 5.6

P 4 / 7
Repair
Tighten the following Tapping screws to each recommended torque (Fig. 11);
(1) PT3x16 (8 pcs) for fastening Housing halves together ...... 1.1 - 1.3 N.m (11 - 13 kgf.cm)
(2) PT3x16 for fastening Stopper to Housing .......................... 0.7 - 0.9 N.m (7.1 - 9.2 kgf.cm)
(3) PT3x10 for fastening LED circuit to to Housing ............... 0.7 - 0.9 N.m (7.1 - 9.2 kgf.cm)
(4) ST3x8 for fastening FET spacer to Yoke unit ..................... 1.1 - 1.5 N.m (11 - 15 kgf.cm)
[1] Tightening Tapping Screws
Fig. 11
When fastening Internal gear case to Housing, be sure to
follow the instructions below.
*Do not reinstall M4x12 Pan head screws removed from
Internal gear case because they are adhesive-coated screws.
Always use brand-new M4x12 pan head screws.
*Tighten four M4x12 pan head screws to the recommended
torque of 0.88 - 1.8 N.m (9.0 - 18 kgf.cm).
Note: Remember to use a criss-cross tightening pattern.
[2] Fastening Internal Gear Case to Housing (Fig. 12)
(4) FET
(Field effect
transistor)
FET spacer
Yoke unit
(2)
(1)
(3)
Stopper
LED circuit
Housing (R)
Housing (L)
ASSEMBLING
Before assembling, apply Makita grease N. No.2 to the
following parts (Fig. 13);
(1) Top of the Spindle where Anvil contacts ........ 0.5 g
(2) Steel ball 5.6 (2 pcs) ....................................... 0.5 g
(3) Steel ball 3.5 (24 pcs) ..................................... 0.5 g
(4) Spur gear 22 (2 pcs) ........................................ 2.0 g
[3] Lubrication of Hammer Section Fig. 13
Fig. 12
(2)
(1)
(3)
(4)
Pan head screw M4x12
Internal gear case

P 5 / 7
Repair
[4] Fastening Hammer Case to Internal Gear Case
Fig. 14
Fig. 15
Fit socket 30-78 (Part No.134847-1) over the hex
portion of Hammer case, and then tighten the socket
to the recommended torque of 25 - 30 N.m
(260 - 310 kgf.cm). (Fig.14)
Caution:
Remember to install Anvil on Hammer case before
fastening Hammer case to Housing.
[5] Installing Stopper on Housing
Because Stopper is not reversible when installed on Housing, be sure to place it as illustrated in Fig. 15.
Hammer case
Hex portion
of hammer case
Stopper
Anvil
Socket 30-78
(134847-1)
Correct
Wrong
Stopper

P 6 / 7
Circuit diagram
Color index of lead wires' sheath
Black
Red
Orange
End bell complete
LED circuit
Switch
Terminal
Connector
Fig. 16
(See next page for Wiring diagram.)

P 7 / 7
Wiring diagram
Hold the lead wires firmly with the lead wire holders.
Be sure to insert the lead wires till they reach the
bottom of each holder.
Caution: Be careful not to break the lead wires.
Make a loose portion of the lead wires here
by placing LED circuit as illustrated below.
Before Installation of Internal Electrical Parts
Fig. 17
After Installation of Internal Electrical Parts
Boss
Pin
Connector
LED circuit
Route the two lead wires (black and red) from LED circuit as illustrated below.
Connector
Terminal
Switch
Motor
End bell complete
Lead wire (red)
from Switch
Pin
rib
FET
Route the following lead wires as illustrated below;
Lead wires from End bell complete, Lead wires from Switch,
Lead wires from LED circuit
Hold the lead wires from Switch
and LED circuit securely with
these lead wire holders.
Place the lead wire (black) from
End bell complete above this rib.
Assemble Insulated
terminals to Switch
so that they do not
touch the boss.