ECHNICAL INFORMATION
PRODUCT
T
P 1 / 16
4340CT, 4340FCT
Model No.
Description
Jig Saw
CONCEPT AND MAIN APPLICATIONS
The above mentioned top handle type jig saw is the H
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
W
L
and soft start
* Pre-setting speed dial for optimal speed setting
Dimensions : mm ( " )
In addition to the above features, Model 4340FCT
Length ( L )
236 (9-1/4)
is equipped with LED job light for easy tracing your cutting line.
Height ( H ) 204 (8)
Width ( W ) 73 (2-7/8)
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output(W)
Input Output
110 6.9 50 / 60 720 320 700
50 / 60
120 6.3 720 320 700
220 3.4 50 / 60 720 320 700
50 / 60
230 3.3 720 320 700
240 3.2
50 / 60 720 320 700
Yes
Strokes per min. : spm.= min.-1 Speed control
800 - 2,800
26 ( 1 ) Soft start Yes
Length of Stroke : mm ( " )
Yes
Blade BOSCH Type Yes Variable speed
shank
MAKITA Type Protection from electric shock by double insulation
Net weight : Kg (lbs.) 2.4 (5.3)
Orbital action of blade Yes / 3 stages
Cord length : m (ft) 2.5 (8.2)
Max.cutting
Wood * 135 (5-5/16)
capacities
Mild Steel
10 (3/8) * With attaching jig saw
: mm (")
blade No. B-16L(optoinal accessory),
20 (25/32)
Aluminum
Standard equipment
* 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.
< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* Guide rule * Jig saw blade No.B-8 * Jig saw blade No.B-17 * Jig saw blade No.B-26
* Guide rail set * Jig saw blade No.B-10 * Jig saw blade No.B-18 * Jig saw blade No.B-27
* Guide rail adaptor * Jig saw blade No.B-11 * Jig saw blade No.B-19 * Jig saw blade No.B-16L
* Kerf board * Jig saw blade No.B-12 * Jig saw blade No.B-21 * Jig saw blade No.BR-13
* Dust nozzle * Jig saw blade No.B-13 * Jig saw blade No.B-22 * Plastic base plate
* Hose * Jig saw blade No.B-14 * Jig saw blade No.B-23
* Jig saw blade No.51 * Jig saw blade No.B-15 * Jig saw blade No.B-24
* Jig saw blade No.58 * Jig saw blade No.B-16 * Jig saw blade No.B-25
Electronic
P 2 / 16
Repair
< 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
Gear housing
cover
Balance plate
Gear housing
Gear complete A
Push plate
B
Pins for supporting
Slider
C
balance plate
Crank complete
Needle bearing 407
Rod
Retainer
Push pin
Blade holder
Lubricant to be applied Parts' name The portion to be lubricated
Gear housing The positions painted with gray
Balance plate The portion where contacts gear complete.
Gear housing cover The three pins which supports balance plate.
MAKITA grease FA. No.2
The portion where contacts retainer.
Push plate
The portion where contacts push plate.
Retainer
Linear guides
The portion where contacts slider.
Slider The portion where contacts needle bearing 407.
Push pin Its whole part
Gear housing cover
The hole where the rod reciprocates.
Machine oil No.120
Rod The portion where contacts dust seal.
P 3 / 16
Repair
< 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.
Torsion spring 6
Tool opener
Base
Pan head screw M4
Hex socket head bolt M5x18
Fig. 1A
Fig. 1
< 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.
Tool opener
Gear
housing
The tail of
torsion spring 6
Blade holder
Gear housing cover
Bottom view
(View from blade holder side)
The tail of torsion spring 6 pushed
Fig. 2
into the original position.
< 4 > Disassembling handle section (Model 4340T / 4340CT / 4340FCT)
1. Separate handle R from handle L by unscrewing the following screws. See Fig. 3.
1 pc. of tapping screw 4x40, < Note in disassembling >
1 pc. of tapping screw M4x50 Handles R and L have spikes respectively for fixing on motor housing.
5 pus. of tapping screws 4x8. Be careful, not to break them, when disassembling.
5 pus. of tapping screws 4x8.
Handle R
Handle L
1 pc. of tapping screw M4x50
Fig. 3
1 pc. of tapping screw 4x40,
P 4 / 16
Repair
2. After removing lead wires (black and white) from lead holder, separate handle L from motor housing.
Lead wire
(white)
Handle L
Lead wire
(black)
Motor housing
Brush holders
Fig. 4
< 5 > Disassembling gear housing cover section
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.
4 pcs. of
Tapping screws CT 4 x 16
Gear housing cover
Safety wire
4340T, 4340CT, 4340FCT
Fig. 5
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
Slider
Slider in the lower
Pin 4
dead point
Rod
Rod
Fig. 6
P 5 / 16
Repair
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.
Gear housing
Linear guides
cover
Slider
Slider
Pin 4
4 ps. of
Pin 4
Pan head
Linear guides
screws M4 x 10
Leaf spring
Rod
Fig. 7
< 6 > Assembling gear housing cover section
1. Assemble tool opener to gear housing cover with referring to Fig. 1A and Fig. 2 at page 3.
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.
Blade holder
Tool opener
Gear housing cover.
Leaf spring
The rolling portion has to be
faced to gear housing side.
Gear housing side
Blade holder's hook has
Gear housing cover
Blade
to contact with tool opener,
holder
when detaching the blade
Rod
Tool opener
with tool opener.
Blade holder's hook
Fig. 8 Fig. 8A
P 6 / 16
Repair
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.
Linear guides
Slider, stood for setting
a pair of linear guide
Rod inserted into
gear housing cover
Slider
Rod
Slider
Pin 4
(Insert it from left side.)
Rod
Slider
Fig. 9A
Fig. 9
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.
Lay linear guides.
Slider
Lift up leaf spring.
Linear guide
Fig. 10
Leaf spring
Pan head screws M4x10
Push slider to the
center of linear guides.
Fig. 10A
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.
Stop ring E-3
Linear guide
Slider
Pin 4
Rod
Fig. 11
P 7 / 16
Repair
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
4 pcs. of
Tapping screws CT 4 x 16
Gear housing cover
Needle bearing 407
Packing
Slider
Gear housing
Crank complete
cover
Balance plate
Safety wire
Gear housing
Align slider to needle bearing 407
4340T, 4340CT, 4340FCT
on crank complete
Fig. 11A
Fig. 11
< 7 > Disassembling blade holder
1. Disassemble rod with referring to "< 5 > Disassembling gear housing cover section" at page 5.
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
Be careful, not to lose push pin,
Retaining
when disassembling.
ring R-18
Rod
Torsion spring 15
Blade holder Blade holder
Fig. 12 Fig. 12A
< 8 > Assembling blade holder
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 space A of blade
holder as illustrated in Fig. 15.
Bring this tail to the
space A of blade
Rod
holder by turning
clockwise.
Push pin
Space A
Torsion spring 15
Blade holder
Aligning the mark
Fig. 15
Insert this tail into
of blade holder and
the hole of rod.
push pin, set blade holder
Fig. 13 Fig. 14
to rod.
P 8 / 16
Repair
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.
Press dust cover to assemble
Retaining ring R-18
Dust cover
firmly to blade holder.
Fig.17
Fig. 16
< 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.
4 pcs. of
Gear housing cover
Tapping screws CT 4 x 16
Safety wire
Fig. 4
Fig. 18
4340T, 4340CT, 4340FCT
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.
3. Disassemble retaining ring S-8. Then, the inner parts can be disassembled from gear housing as illustrated in Fig.20.
< 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.
Needle bearing 407
Retaining ring S-8
No.1R235
Round bar for arbor
2 pcs. of hex socket
head bolts M4 x 12
Crank complete
Flat washer 8
Balance plate
Balance plate
Gear complete
Push plate
Retaining ring S-8
Crank complete
Fig.19
Seal plate
Gear housing
Fig.20
P 9 / 16
Repair
< 10 > Assembling parts in gear housing
1. Assemble flat washer 8 to the shaft in gear housing. See Fig. 21.
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.
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.
< 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.
7. Assemble retaining ring S-8 to the shaft of gear housing. See Fig. 26.
Gear complete
Flat washer 8
Balance plate Gear housing
Push plate
Seal plate
Gear housing
Gear housing
Fig.21 Fig.22 Fig.23
Press crank complete down to the position where
you can see the shaft's groove for retaining ring S-8.
Groove for retaining
2 pcs. of hex socket
Something like
Crank ring S-8
head bolts M4 x 12
1R235 "round bar
complete
for arbor"
Balance plate
Retaining ring S-8
Crank complete
Fig. 24
Fig. 25
Retaining ring S-8
Crank complete
Balance plate
Gear complete
Push plate
Flat washer 8
Seal plate
Fig. 26
P 10 / 16
Repair
< 11 > Disassembling armature (4340T, 4340CT, 4340FCT)
1. With referring to the following section, disassemble handle L and R, and gear housing cover.
"< 4 > Disassembling handle section" at page 3
"< 5 > Disassembling gear housing cover section" at page 4
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.
Needle bearing 407
Retaining S-8
Crank complete
Gear complete
Balance plate
Fig. 27
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 pcs. of
Gear housing
tapping screws
M4 x 30
Armature
Motor housing
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.
Insulation washer
Ball baring 607
Rubber ring 19
Self lock
Wave washer 6
Magnet sleeve
(Magnet sleeve is not used in
Fig. 29
model 4341T.)
5. Disassemble ball bearing 607 LLB from armature shaft as illustrated in Fig. 30.
No.1R269 Bearing extractor
Insulation washer
Ball bearing 607 LLB
Fig. 30
P 11 / 16
Repair
< 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.
"< 4 > Disassembling handle section" at page 3 (for 4340T, 4340CT, 4340FCT)
"< 5 > Disassembling gear housing cover section" at page 4
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.
Cap 5
Compression
spring 3
Stop ring E-5
Align lever 17 with indication " III ".
Lever 17
Fig. 35
P 12 / 16
Circuit diagram
Model 4340FCT (with controller and LED job light)
Model 4340CT ( with controller, without LED job light)
Color index of lead wires
Black
Orange
White Blue
Red
Instead of terminal block,
In stead of blue, white lead wire
insulated terminal is used
is used in the product for some
in the products for some
countries.
countries.
Insulated
terminal
3
Switch
Controller
2
Power supply cord
Terminal block
The orange lead wire is not
used in the product for low
Noise
voltage area.
Field
suppressor
(Noise suppressor is not
used in some countries.)
Pick-up coil
LED
Job light
LED job light is not
installed in model 4340CT
Connect field lead wire (white)
and 4341CT.
through insulated terminal as follows,
when repairing.
Controller lead wire
Field lead wire (white)
(Orange)
Insulated
terminal
Field
Connecting
lead wire (white)
P 13 / 16
Circuit diagram
Model 4340T (without controller andt LED circuit)
Color index of lead wires
Black
White
See-through
Instead of terminal block,
insulated terminal is used
in the products for some
3
countries.
Switch
2
Terminal block
Power supply cord
Noise
suppressor
Field
(Noise suppressor is not
used in some countries.)
To be connected to
field core.
P 14 / 16
Wiring diagram in motor housing Side A
4340T, 4340CT and 4340FCT
Side D
Side B
Side C
Side D
Fix lead wires from
the rear portion of
Side A
motor housing to handle,
with lead holder.
And do not slack the
Side C
lead wires in motor housing.
Side B
Fix the lead wires with
lead holders.
Side C
Side A
Field lead wire
Grounding lead wire
(Black) Field lead wire
(See-through) to be connected
(White)
to field core
Field lead wire
Controller's
(Black)
lead wire (Orange), which is
not used in the products for
low voltage area.
P 15 / 16
Wiring diagram in handle section
4340CT (with controller, without LED jog light)
Roll the slack portion of LED lead
4340FCT (with controller and LED jog light)
wire around lead holders.
Lead holder
Put slack portion of lead wires
between pins.
Pin
Controller
Terminal block
Switch
Noise suppressor
Wall
Rib
Pick-up coil
LED Job light
Brush holders
(for 4340FCT)
Field lead wire
(black)
Pass lead wires between wall
Field lead wire
and rib.
(white)
Field lead wire
(black)
P 16 / 16
Wiring diagram in handle section
4340T (without controller, without LED jog light)
Wall
Rib
Field lead wire
(black)
Pass lead wires between wall
Field lead wire
and rib.
(white)
Grounding lead wire
( See-through)
Field lead wire
(black)
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