Makita tw0250 Manual

PRODUCT
P 1/ 10
TECHNICAL INFORMATION
Model No.
Description
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Note: The standard equipment for the tool shown above may differ by country.
TW0250
Impact Wrench
TW0250 has been developed as a sister model of TW0200,
featuring 500W powerful motor to deliver maximum fastening
torque of 250N.m (25% higher than TW0200’s 200N.m)
for a wide range of professional applications.
Socket 24-25 .................................. 1
Hook .............................................. 1
Plastic carrying case ...................... 1
Optional accessories
Sockets
Extension bar
Universal joint
Oval socket
Bit adapter
Socket bit
Phillips bits
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 250 (9-7/8)
72 (2-13/16)
220 (8-5/8)
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output (W)
110 4.8 50/60 500 365
Current (A)
250
L
H
W
No load speed: min.-1=rpm
Impacts per min.: min.-1=ipm
Max. fastening torque*: N.m (ft.lbs)
Rotation reversing facility
Net weight : kg (lbs)
0 - 2,300
0 - 2,300
250 (190)
Driving shank
Yes
(by push-button type switch)
2.1 (4.6)
12.7mm (1/2") Square
Capacities M10 - M20Standard bolt
M10 - M14High tensile bolt
*torque at 3 seconds after seating when fastening M16 high tensile bolt
Power supply cord: m (ft) 2.5 (8.2)
Protection against electric shock Double insulation

P 2/ 10
Repair
CAUTION: Remove the socket from the machine for safety before repair/ maintenance
in accordance with the instruction manual!
[1] NECESSARY REPAIRING TOOLS
[2] LUBRICATIONS
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Hammer case complete
Fig. 1
Fig.2
Code No. Description Use for
1R045 Gear extractor (large) Disassembling Hammer
1R346 Center attachment Disassembling Hammer
1R229 1/4” Hex shank bit for M5 Disassembling Hammer case complete
1R269 Bearing extractor Removing Ball bearing from Armature
1R344 Torque driver Tightening M5x50 Hex socket head bolt
1R288 Screwdriver magnetizer Removing Steel ball 6.4 from Spindle
Apply Makita grease N.No.1 to the following portions designated with the black triangle to protect parts
and product from unusual abrasion.
Portion to lubricate Amount
a little
DISASSEMBLING
Cup washer 5 (4pcs.)
Internal gear cover
complete
Carbon
brush
Urethane ring 5 (4pcs.)
M5x50 Hex socket
head bolt (4pcs.)
Hammer case
complete
Steel ball 3.5
(31pcs.)
Anvil SpindleHammer
Steel ball 6.4
(2pcs.)
Spur gear 32
(2pcs.)
Contact face of Hammer case complete and Anvil
A
Contact face of Anvil and Spindle
B
4.4g
Impact area of Anvil and Hammer
C
Contact face of Hammer, Anvil and Steel ball 6.4 (31pcs.)
Da little
Contact face of Hammer and Steel ball 3.5 (2pcs.)
E
C E
F
B
D
Carbon
brush
Armature
(1) Separate Hammer case complete and Internal gear cover complete from Motor housing. See Fig. 2.
1. Remove two Carbon brushes, and
separate four M5x50 Hex socket head
bolts.
Pay attention not to lose Cup washer 5
and Urethane ring 5.
2. Remove Hammer case complete together with
Internal gear cover complete and Armature.
Hammer case complete
2.0g
Gear teeth of Spur gear 32 (2pcs.)
F
A

P 3/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Hammer case complete (cont.)
DISASSEMBLING
Pull off Armature while holding Internal gear cover complete and Hammer case complete by hand
so that they do not separate out.
Hammer case complete
Internal gear cover complete
Hammer case
complete
Remove Hammer case complete from Internal gear cover complete, and then disassemble the
components as illustrated below.
Flat washer 19
(This washer is left in Hammer case complete
due to grease.)
Anvil
Hammer section
Remove Flat washer 8, and then
pull off Pin 6.
Spur gear 32 can be removed
from Hammer section.
Internal gear 71
O ring 58
Internal gear
cover complete
(2) Disassemble Hammer case section as illustrated in Figs 3 and 4.
Flat washer 18
Pin 6 (2pcs.)
Spur gear 32
(2pcs.)
Figs 3
Figs 4

P 4/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Hammer case complete (cont.)
ASSEMBLING
Fit the protrusions of Internal gear 71
into the notches of Internal gear cover
complete.
Internal gear 71
(4) Pass four M5x50 Hex socket head bolts through Urethane rings 5 and Cup washers 5.(Refer to Fig. 2.)
Secure Hammer case section to Motor housing by tightening M5x50 Hex socket head bolts.
Note: Pre-set the fastening torque of 1R344 to 1.6 N.m - 2.0 N.m when fastening Hammer case section with
M5x50 Hex socket head bolts
Internal gear
cover complete
(2) Assemble Hammer case section by reversing the disassembling step. Refer to Figs. 4 and 3.
(3) Assemble Hammer case section to Motor housing as illustrated in Fig. 6.
(1) Internal gear 71 can be assembled to Internal gear cover complete as illustrated in Fig. 5.
Fig. 5
Fig. 6
Protrusion
of Hammer case
complete
Protrusion
of Internal gear
cover complete
Groove of
Handle cover
1. Align the protrusion of Hammer case complete
with the protrusion of Internal gear cover
complete.
2. Fit the protrusion of Hammer case into the groove of Handle cover.
DISASSEMBLING
(1) Armature can be disassembled as illustrated in Figs. 2 and 3.
(2) Remove Ball bearings from the Armature as illustrated in Fig. 7.
Ball bearing 608DDW
Ball bearing 607LLB 1R269 1R269
Fig. 7
[3]-2. Armature

P 5/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Armature
ASSEMBLING
Fig. 8
Fig. 9 Fig. 10
Internal gear cover complete
Take the disassembling step in reverse
Note: Make sure that O ring 22 is assembled in Internal gear cover complete before assembling Armature. Refer to Fig. 8.
O ring 22
[3]-3. Hammer section
2. Hold Hammer section as illustrated in Fig. R,
and release it from the gear extractor.
Note: Do not hold gear extractor as illustrated in Fig. F when
releasing Hammer section from Gear extractor.
Failure to follow this instruction could cause Steel balls
to drop out of hammer.
Fig. R Fig. F
1. Press down Hammer using 1R045 to align the
opening for Steel ball 6.4 insertion with the top
of cam grooving on Spindle.
And then, remove Steel ball 6.4 from
Spindle.
Hammer
Spindle
Top of
Cam groove
on Spindle
Opening for
Steel ball
insertion
Steel ball 6.4
(2pcs.)
DISASSEMBLING
(1) Disassemble Hammer case section, and separate Hammer section from Hammer case section as illustrated in Figs. 2,
3 and 4.
(2) Disassemble the Hammer section as illustrated in Figs. 9 and 10.

P 6/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Hammer section
DISASSEMBLING
ASSEMBLING
Flat washer 18
Pin 6 (2pcs.)
Spindle Spur gear 32
(2pcs.)
Compression
spring 30
Cup
washer 19
Spindle section
Hammer section can be disassembled
as illustrated above.
Fig. 11
Hammer
Hammer
(3) Spindle section Compression spring 30, Cup washer 19, Steel balls and Flat washer 12 can be removed from Hammer
as illustrated in Fig. 11.
Flat washer 32
Steel ball 3.5
(31pcs.)
After removing Flat washer 32,
Steel balls 3.5 can be removed
from Hammer.
Fig. 12
Place for one steel ball has to be reserved
in Hammer when twenty four Steel balls
are put in.
(1) Make sure that thirty one Steel balls are put in the Hammer as illustrated in Fig. 12.
(2) Assemble the Hammer section by taking the disassembling step in reverse. Refer to Figs. 11, 10 and 9.

P 7/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Baffle plate
DISASSEMBLING
DISASSEMBLING
Remove Handle cover. So, F/R Change lever is disassembled together with Handle cover. Remove F/R Change lever
from Handle cover. See Fig. 14, 15.
Take the disassembling step in reverse.
4x18 Tapping
screw (3pcs.)
Handle cover
Separate Handle cover from Motor housing by
removing 4x18 Tapping screws. F/R Change lever
comes with Handle cover.
ASSEMBLING
(1) Separate Hammer case section and armature from Motor housing, as illustrated in Fig. 2.
(2) Baffle plate can be removed as illustrated in Fig. 13.
Handle
cover
Baffle plate
Slide Baffle plate to Handle cover, and pull it up.
Fig. 13
Fig. 14
Fig. 15
[3]-5. F/R Change lever
Handle cover
F/R Change
lever
Push F/R change lever to left or right side
until it stops. Both ends are free from
Handle cover.
Pull the F/R Change lever to the inside
of Handle cover. And remove it.
F/R Change
lever

P 8/ 10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-5. F/R Change lever
ASSEMBLING
Mount F/R Change lever to Handle cover, and assemble them to Motor housing as illustrated in Fig. 16.
Facing the mark of >PC< to the top, assemble F/R Change lever.
Otherwise, Reverse switch can not be controlled by F/R Change lever.
Mark of
> PC <”
Pin
Switch in
Motor housing
F/R Change lever
After assembling F/R Change lever
to Handle cover, mount the Handle
cover to Motor housing.
Refer to Fig. S.
Fitting the grooved portion to
the pin of Switch, assemble
Handle cover to Motor housing.
F/R Change
lever
Fig. S
Fig. 16

Circuit diagram
Fig. D-1
Makita logo side
Connect Field lead wire
(orange) to Brush holder B
on Makita logo side.
Connect Field lead wire
(purple) to Brush holder
A on Name plate TW0250
side.
Name plate
TW0250 side
Noise suppressor
(if used)
Power supply cord Sponge
White
Color index of lead wires' sheath
Black
Brush holder A
Brown Lead wire is used for
some countries.
Blue Lead wire is used for
some countries.
Brush holder B
Field
12
M2
C1
1
C2
2
3
4
M1
Switch
Red
Orange
Blue
Purple
P 9/ 10

Wiring diagram
Rib
Switch
Switch trigger
Facing the round side to Armature
side, apply Insulation cover to Field.
And tighten Field with 4x50 Tapping
screw.
Tab Connector
Pass Lead wire with Tab connector
between Rib and Motor housing.
Rib
Field leads wire on the Hammer
case side have to be guided
along the inner wall of Motor
housing.
Guide the Lead wires of Power
supply cord between the wall of
Makita logo side and Rib.
Noise suppressor (if used)
covered by Sponge
TW0250 Name plate side
Viewed from Hammer case side
Makita logo side
Switch
Assemble Field to Motor housing
while facing its Lead wire (orange)
to Switch side in order to connect
orange lead wire to Brush holder of
Makita logo side exactly.
Field lead wire
(orange)
Field lead wire
(purple)
Motor housing
When assembling Field to Motor housing, the Spring terminal of orange lead wire has to be connected to Brush holder
on Makita logo side. Do assembling as illustrated in Fig. D-2.
Makita
logo side Brush holder
Fig. D-2
Fig. D-3
Insulation cover
Put the extra portion of Lead wires
into the space between the inner wall
of Motor housing and Field core.
P 10/ 10