Makita 4340CT Manual

Model No.
Description
PRODUCT
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
< Note > The standard equipment for the tool shown may differ from country to country.
P 1 / 16
Continuous Rating (W)
Voltage (V)
4340CT, 4340FCT
Jig Saw
Cycle (Hz) Input Output Max. Output(W)
220
230
240
3.4 50 / 60
50 / 60
50 / 60
3.3
3.2
Current (A)
The above mentioned top handle type jig saw is the
advanced version of the existing model 4304T series.
Its brief benefits and features are
* New tool less blade change system
* Incredibly low vibration and noise level
* Built-in electronic control system for keeping constant speed
and soft start
* Pre-setting speed dial for optimal speed setting
In addition to the above features, Model 4340FCT
is equipped with LED job light for easy tracing your cutting line.
L
W
H
Dimensions : mm ( " )
Width ( W )
Height ( H )
Length ( L ) 236 (9-1/4)
204 (8)
73 (2-7/8)
720
720
720
700
700
700
320
320
110
120 6.9 50 / 60
50 / 60
6.3 720
720 700 700
320
320
320
* With attaching jig saw
blade No. B-16L(optoinal accessory),
800 - 2,800
26 ( 1 )
10 (3/8)
20 (25/32)
* 135 (5-5/16)
Strokes per min. : spm.= min.-1
Length of Stroke : mm ( " )
Blade
shank
Max.cutting
capacities
: mm (")
Wood
Mild Steel
Aluminum
2.4 (5.3)
2.5 (8.2)
by double insulation
Net weight : Kg (lbs.)
Cord length : m (ft)
Speed control
Soft start
Variable speed
Protection from electric shock
MAKITA Type
BOSCH Type
Orbital action of blade Yes / 3 stages
Yes
Electronic
Yes
Yes
Yes
* Jig saw blade set (including B-10: 2 pcs., BR-13: 2 pcs., B-22: 2 pcs.)......... 1 set
* Cover plate ..................................................................................................... 1 pc.
* Kerf board ..................................................................................................... 1 pc.
* Hex wrench ..................................................................................................... 1 pc.
* Dust nozzle (only for Europe) ......................................................................... 1 pc.
* Plastic carrying case ........................................................................................ 1 pc.
* Guide rule
* Guide rail set
* Guide rail adaptor
* Kerf board
* Dust nozzle
* Hose
* Jig saw blade No.51
* Jig saw blade No.58
* Jig saw blade No.B-8
* Jig saw blade No.B-10
* Jig saw blade No.B-11
* Jig saw blade No.B-12
* Jig saw blade No.B-13
* Jig saw blade No.B-14
* Jig saw blade No.B-15
* Jig saw blade No.B-16
* Jig saw blade No.B-17
* Jig saw blade No.B-18
* Jig saw blade No.B-19
* Jig saw blade No.B-21
* Jig saw blade No.B-22
* Jig saw blade No.B-23
* Jig saw blade No.B-24
* Jig saw blade No.B-25
* Jig saw blade No.B-26
* Jig saw blade No.B-27
* Jig saw blade No.B-16L
* Jig saw blade No.BR-13
* Plastic base plate

Repair
P 2 / 16
< 1 > Lubrication
Apply MAKITA grease FA. No.2 to the portions marked with black triangle, and machine oil No.120
to the portions marked with gray triangle to protect parts and product from unusual abrasion.
Linear guide
Linear guides
Balance plate
Balance plate
Gear complete
Push plate
Retainer
Push plate
Retainer
Slider
Crank complete
Pins for supporting
balance plate
Push pin
Push pin
Blade holder
Gear housing
Needle bearing 407
Gear housing
cover
Gear housing
A
B
C
Parts' nameLubricant to be applied The portion to be lubricated
MAKITA grease FA. No.2
The positions painted with gray
The three pins which supports balance plate.
The portion where contacts gear complete.
The portion where contacts retainer.
The portion where contacts push plate.
The portion where contacts slider.
The portion where contacts dust seal.
Slider The portion where contacts needle bearing 407.
The hole where the rod reciprocates.
Gear housing cover
Gear housing cover Its whole part
Machine oil No.120
Rod
Rod

Repair
P 3 / 16
Hex socket head bolt M5x18
Base
Torsion spring 6
Tool opener
Pan head screw M4
< 2 > Disassembling tool opener
1. Separate base from the jig saw unit by unscrewing hex socket head bolt M5x18. See Fig. 1.
2. Unscrew pan head screw M4. Then tool opener and torsion spring 6 can be disassembled. See Fig. 1A.
< 3 > Assembling tool opener
1. Put torsion spring 6 into tool opener . And fasten tool opener with pan head screw M4. See Fig. 1A above.
2. Bring the tail of torsion spring 6 which is extruding from tool opener, to the original position by turning it
clockwise. See Fig. 2.
< 4 > Disassembling handle section (Model 4340T / 4340CT / 4340FCT)
1. Separate handle R from handle L by unscrewing the following screws. See Fig. 3.
Fig. 1 Fig. 1A
The tail of
torsion spring 6
The tail of torsion spring 6 pushed
into the original position.
Blade holder
Tool opener
1 pc. of tapping screw 4x40,
1 pc. of tapping screw M4x50
5 pus. of tapping screws 4x8.
1 pc. of tapping screw 4x40,
1 pc. of tapping screw M4x50
5 pus. of tapping screws 4x8. Handle R
Handle L
Fig. 2
Fig. 3
Gear housing cover
Gear
housing
Bottom view
(View from blade holder side)
< Note in disassembling >
Handles R and L have spikes respectively for fixing on motor housing.
Be careful, not to break them, when disassembling.

Repair
P 4/ 16
2. After removing lead wires (black and white) from lead holder, separate handle L from motor housing.
Lead wire
(black)
Lead wire
(white)
Handle L
Motor housing
Brush holders
Fig. 4
1.After taking off safety wire from gear housing cover, unscrew 4 pcs. of tapping screws CT 4 x 16.
Then, gear housing cover can be separated from gear housing. See Fig. 5.
< 5 > Disassembling gear housing cover section
4340T, 4340CT, 4340FCT
4 pcs. of
Tapping screws CT 4 x 16
Safety wire
Gear housing cover
Fig. 5
Fig. 6
2.Take off stop ring E-3 with small flat head screwdriver. And push slider to the lower dead point. See Fig. 6.
Stop ring E-3
Pin 4
Rod
Slider
Slider in the lower
dead point
Rod

Repair
P 5 / 16
3.Slide pin 4 in order to disconnect rod with slider. And then, pull out rod from gear housing cover.
Disassemble linear guides by unscrewing 4 ps. of pan head screws M4 x 10. So, leaf spring, pin 4 and slider can be
disassembled from gear housing cover. See Fig. 7.
Fig. 7
Rod
Pin 4
Slider
Pin 4
Slider
Linear guides
Linear guides
4 ps. of
Pan head
screws M4 x 10
Leaf spring
Gear housing
cover
The rolling portion has to be
faced to gear housing side.
Gear housing cover.
Leaf spring
2. Put leaf spring in gear housing cover, paying attention to its assembling direction as illustrated in Fig. 8.
And insert rod into gear housing cover, paying attention to the direction of hook of blade holder
as illustrated in Fig. 8A.
1. Assemble tool opener to gear housing cover with referring to Fig. 1A and Fig. 2 at page 3.
< 6 > Assembling gear housing cover section
Gear housing side
Tool opener
Rod
Blade
holder
Fig. 8 Fig. 8A
Blade holder's hook
Blade holder's hook has
to contact with tool opener,
when detaching the blade
with tool opener.
Blade holder
Gear housing cover
Tool opener

Repair
P 6 / 16
3. Align the hole of slider and the same of rod, and insert pin 4 into the aligned holes from left side as illustrated
in Fig. 9.
Stand slider and insert a pair of linear guide as illustrated in Fig. 9A.
4. Lifting up leaf spring, lay a pair of linear guide in order to position leaf spring on linear guides as illustrated
in Fig. 10.
And push slider to the center of linear guides. Fasten linear guides with 4 pcs. of pan head screws
M4 x 10 as illusdtrated in Fig. 10A.
Rod
Rod
Pin 4
(Insert it from left side.)
Slider
Slider
Slider, stood for setting
a pair of linear guide
Fig. 9 Fig. 9A
Rod inserted into
gear housing cover
Linear guides
Slider
Lift up leaf spring.
Lay linear guides.
Leaf spring
Linear guide
Slider
Fig. 10
Push slider to the
center of linear guides.
Pan head screws M4x10
Fig. 10A
Stop ring E-3
Pin 4
Rod
5. Assemble stop ring E-3 to pin 4 as illustrated in Fig. 11.
Check, whether slider can reciprocate on linear guide smoothly, or not.
If slider does not reciprocate smoothly, incorrectly assembled linear guides can interfere with slider
in reciprocating. Try again to assemble linear guides correctly.
Fig. 11
Slider
Linear guide

Repair
P 7 / 16
5. Lubricate the parts assembled in gear housing cover with referring to "< 1 > Lubrication " at page 2.
6. Aligning slider to needle bearing 407 on crank complete, assemble gear housing cover section to gear housing
as illustrated in Fig. 11 . Do not forget to assemble packing between gear housing cover
and gear housing. See Fig.11A
4340T, 4340CT, 4340FCT
4 pcs. of
Tapping screws CT 4 x 16
Safety wire
Gear housing cover
Packing
Crank complete
Balance plate
Needle bearing 407
Slider
Gear housing
Align slider to needle bearing 407
on crank complete
Gear housing
cover
Fig. 11 Fig. 11A
< 7 > Disassembling blade holder
< 8 > Assembling blade holder
1. Disassemble rod with referring to "< 5 > Disassembling gear housing cover section" at page 5.
1. Apply MAKITA grease FA No.2 to push pin and set it in the hole of rod. And assemble torsion spring 15 to rod by
inserting its tail shown in Fig. 13 into the hole of rod.
2. Set blade holder to rod as illustrated in Fig. 14. And bring the tail of torsion spring 15 to the spaceA of blade
holder as illustrated in Fig. 15.
2. Disassemble dust cover, and then disassemble retaining ring R-18. as illustrated in Fig. 12.
So blade holder and torsion spring 15 can be separated from rod as illustrated in Fig. 12A.
Dust cover
Retaining
ring R-18
Rod
Blade holder Blade holder
Torsion spring 15
Be careful, not to lose push pin,
when disassembling.
Fig. 12 Fig. 12A
Insert this tail into
the hole of rod. Fig. 13
Push pin
Torsion spring 15
Rod
Aligning the mark
of blade holder and
push pin, set blade holder
to rod.
Blade holder
Fig. 14
Fig. 15
Bring this tail to the
space A of blade
holder by turning
clockwise.
Space A

Repair
P 8 / 16
3. Push rod into blade holder, and assemble retaining ring R-18 to the groove in blade holder as illustrated in Fig. 16.
4. Assemble dust cover as illustrated in Fig.17.
Retaining ring R-18 Dust cover
Fig.17
Fig. 16
Press dust cover to assemble
firmly to blade holder.
< 9 > Disassembling parts in gear housing
1. After taking off safety wire from gear housing cover, unscrew 4 pcs. of tapping screws CT 4 x 16.
Separate gear housing cover from gear housing. See Fig. 18.
Fig. 18
4340T, 4340CT, 4340FCT
4 pcs. of
Tapping screws CT 4 x 16
Safety wire
Gear housing cover
Fig. 4
2. Locking crank complete with something bar-formed metal, unscrew 2 pcs. of hex socket head bolts M4 x 12 as
illustrated in Fig.19.
< Note in disassembling>
2 pcs. of hex socket head bolts M4 x 12 are adhesive bolts.
It is recommended to unscrew them with impact driver.
2 pcs. of hex socket
head bolts M4 x 12
Crank complete
Balance plate
No.1R235
Round bar for arbor
Fig.19
Retaining ring S-8
Push plate
Seal plate
Flat washer 8
Gear housing
Balance plate
Gear complete
Crank complete
Needle bearing 407
3. Disassemble retaining ring S-8. Then, the inner parts can be disassembled from gear housing as illustrated in Fig.20.
Fig.20
Retaining ring S-8

Repair
P 9 / 16
< 10 > Assembling parts in gear housing
Fig.21 Fig.22 Fig.23
1. Assemble flat washer 8 to the shaft in gear housing. See Fig. 21.
4. Assemble gear complete and balance plate to the shaft in gear housing. See Fig. 23.
5. Assemble crank complete to gear housing. With turning crank complete, press it down to the position in which
you can see the shaft's groove for retaining ring S-8. See Fig. 24.
( With turning crank complete, press it down to the position in which
you can see the shaft's groove for retaining ring S-8. )
6. Lock crank complete with something like 1R235 "round bar for arbor", and fasten crank complete
with 2 pcs. of hex socket head bolts M4 x 12 with adhesive. See Fig. 25.
7. Assemble retaining ring S-8 to the shaft of gear housing. See Fig. 26.
2. After assembling seal plate to push plate, assemble them to the shaft in gear housing. See Fig. 22.
3. Lubricate the parts with referring to " < 1 > Lubrication " at page 2.
< Note >
Do not fasten with the used hex socket head bolts M4 x 12. The fresh adhesive hex socket head bolts M4 x 12
have to be used. The fastening torque of these bolts is 2.4 - 3.5 N.m.
Gear housing
Flat washer 8
Gear housing
Push plate
Seal plate
Gear complete
Balance plate
Fig. 24
Fig. 25
Press crank complete down to the position where
you can see the shaft's groove for retaining ring S-8.
Crank
complete
2 pcs. of hex socket
head bolts M4 x 12
Crank complete
Balance plate Retaining ring S-8
Something like
1R235 "round bar
for arbor"
Fig. 26
Retaining ring S-8
Flat washer 8
Push plate
Seal plate
Balance plate
Gear complete
Crank complete
Gear housing
Groove for retaining
ring S-8

Repair
P 10 / 16
< 11 > Disassembling armature (4340T, 4340CT, 4340FCT)
1. With referring to the following section, disassemble handle L and R, and gear housing cover.
2. Disassemble retaining ring S-8, and separate crank complete and balance plate from the shaft of gear housing
as illustrated in Fig. 27.
< Note in disassembling >
* No need to disassembling hex socket head bolt M4 x 12 and crank complete from balance plate.
* Be careful, not to lose needle bearing 407.
Retaining S-8
Crank complete
Needle bearing 407
Balance plate
3. Unscrew 4 pcs. of tapping screws M4 x 30, and separate gear housing from motor housing.
Separate armature from gear housing as illustrated in Fig. 28.
4. Disassemble self lock with small flat head screwdriver. Then, magnet sleeve, wave washer 6 and rubber ring 19
can be disassembled from armature shaft as illustrated in Fig. 29.
4 pcs. of
tapping screws
M4 x 30
Fig. 28
Gear housing
Armature
Motor housing
Fig. 29
Self lock
Magnet sleeve
Wave washer 6
Rubber ring 19
Ball baring 607
Insulation washer
(Magnet sleeve is not used in
model 4341T.)
Fig. 27
"< 4 > Disassembling handle section" at page 3
"< 5 > Disassembling gear housing cover section" at page 4
Gear complete
5. Disassemble ball bearing 607 LLB from armature shaft as illustrated in Fig. 30.
Ball bearing 607 LLB Insulation washer
No.1R269 Bearing extractor
Fig. 30

Repair
P 11 / 16
< 12 > Disassembling lever 17 ( for orbital action mode change)
1. With referring to the following section, disassemble handle L and R, or head cover L and R, and gear housing cover.
2. Disassemble stop ring E-5 from the shaft portion of lever 17 with small flat head screwdriver. See Fig. 35.
3. Aligning lever 17 with indication " III ", pull out it from gear housing. Then, cap 5 and compression spring 3
are disassembled. See Fig. 35.
"< 4 > Disassembling handle section" at page 3 (for 4340T, 4340CT, 4340FCT)
"< 5 > Disassembling gear housing cover section" at page 4
Fig. 35
Stop ring E-5 Align lever 17 with indication " III ".
Compression
spring 3
Cap 5
Lever 17

P 12 / 16
Circuit diagram
Model 4340FCT (with controller and LED job light)
Model 4340CT ( with controller, without LED job light)
Power supply cord Terminal block
Insulated
terminal
LED
Job light
Pick-up coil
Field
Field
Noise
suppressor
Switch
2
3
Color index of lead wires
Black
White
Red
Orange
Blue
Controller
Insulated
terminal
Connecting
lead wire (white)
Connect field lead wire (white)
through insulated terminal as follows,
when repairing.
The orange lead wire is not
used in the product for low
voltage area.
Instead of terminal block,
insulated terminal is used
in the products for some
countries.
(Noise suppressor is not
used in some countries.)
In stead of blue, white lead wire
is used in the product for some
countries.
LED job light is not
installed in model 4340CT
and 4341CT.
Field lead wire (white)
Controller lead wire
(Orange)

P 13 / 16
Circuit diagram
Model 4340T (without controller andt LED circuit)
Power supply cord Terminal block
Field
Noise
suppressor
Switch
2
3
Color index of lead wires
Black
White
See-through Instead of terminal block,
insulated terminal is used
in the products for some
countries.
(Noise suppressor is not
used in some countries.)
To be connected to
field core.

Wiring diagram in motor housing
4340T, 4340CT and 4340FCT
Side A
Side A
Side A
Side B
Side B
Side C
Side D
Side D
Side C
Side C
Fix lead wires from
the rear portion of
motor housing to handle,
with lead holder.
And do not slack the
lead wires in motor housing.
Field lead wire
(White)
Field lead wire
(Black)
Field lead wire
(Black) Controller's
lead wire (Orange), which is
not used in the products for
low voltage area.
Grounding lead wire
(See-through) to be connected
to field core
Fix the lead wires with
lead holders.
P 14 / 16

Wiring diagram in handle section
P 15 / 16
4340CT (with controller, without LED jog light)
4340FCT (with controller and LED jog light)
Switch
Terminal block
Noise suppressor
Controller
Brush holders
Pin
Lead holder
LED Job light
Pick-up coil
Pass lead wires between wall
and rib.
Wall
Rib
Put slack portion of lead wires
between pins.
Roll the slack portion of LED lead
wire around lead holders.
Field lead wire
(white)
Field lead wire
(black)
Field lead wire
(black)
(for 4340FCT)

P 16 / 16
Wiring diagram in handle section
4340T (without controller, without LED jog light)
Wall
Rib
Field lead wire
(white)
Field lead wire
(black)
Field lead wire
(black)
Grounding lead wire
( See-through)
Pass lead wires between wall
and rib.