Makita JR3070CT Manual

Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output(W)
110
120
220
230
240
14.5
15
7.2
6.9
6.6
50/60
50/60
50/60
50/60
50/60
1,510
1,700
1,510
1,510
1,510
650
950
650
650
650
1,600
1,600
1,600
1,600
1,600
Models No.
Description
PRODUCT
Current (A)
TECHNICAL INFORMATION
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
Note: The standard equipment for the tool shown above may differ by country.
P 1 / 15
JR3070CT
Recipro Saw
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 485 (19-1/8)
99 (3-7/8)
181 (7-1/8)
Model JR3070CT has been developed as the highest specification
model in Makita Recipro Saws.
Features electronic control and orbital mechanism for extra-high
cutting efficiency while ensuring low vibration performance with
our innovative AVT (Anti-Vibration Technology).
Additionally, provides more control and comfort with toolless
blade change, toolless shoe adjustment and rubberized soft grip.
L
H
W
North America:
Recipro saw blade (for Steel)
Recipro saw blade (for Composite)
Steel carrying case
All countries other than North America:
Recipro saw blades No.21 (for Steel)
Recipro saw blades No.22 (for Steel)
Recipro saw blade No.23 (for Wood and Plywood)
Plastic carrying case
Recipro saw blades No.21, 22, 24 (for Steel)
Recipro saw blade No.23, 23B (for Wood and Plywood)
Stroke per minute: min-1
Variable speed control
Net weight: kg (lbs)
Power supply cord: m (ft)
Capacity *Wood: mm (")
Pipe: dia. mm (")
Length of Stroke: mm (")
0 - 2,800
32 (1-1/4)
255 (10)
130 (5-1/8)
4.4 (9.7)
Europe: 4.0 (13.1)
Australia: 2.0 (6.6)
Other countries: 2.5 (8.2)
Yes
*when cutting with the supplied 300mm (11-3/4") length recipro saw blade.

P 2 / 15
Repair
[2] LUBRICATION AND ADHESIVE APPLICATION
[2] -1. LUBRICATION
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the saw blade from the machine for safety before repair/ maintenance !
Code No.
1R291
---- Inserting push plate into blade clamp section of slider
Retaining Ring S and R Pliers
1R327
Recipro saw blade
Description Use for
Torx screwdriver T25H120
1R314 Torx bit VT-25
1R269 Bearing extractor (small)
Installing/removing Torx countersunk head screw
Installing/removing Torx countersunk head screw
Removing Ball bearing 6001DDW
1R280 Round bar for arbor 6-50 Removing pin 7
1R247 Round bar for arbor 20-100 Removing Ball bearing 6003LLB
1R245 Round bar for arbor 16-100
1R041 Vise plate
Removing torque limiter complete
Protecting crank cam complete, when fasten it with vise
1R268 Spring pin extractor Removing shift button
1R223 Torque wrench shaft 20-90N.m Tightening torque limiter complete
1R254 Torque wrench shaft 2-6N.m Tightening torx socket head screw M5x14
Installing/removing Retaining rings S-18 and S-12
Apply Makita grease FA No.2 to the following portions designated with the black triangle to protect
parts and product from unusual abrasion.
Blade Clamp Section
Driving sleeve
Driving sleeve guide
Pin 3
Sleeve
Guide sleeve
Compression
spring 6
Item No. Description
66 Shoulder pin 5
64 Pin 3
Portion to lubricate
Head which contacts Driving sleeve
Surface which contacts Guide sleeve
Surface which contacts Slider
Fig. 1

P 3 / 15
Repair
[2] -1. LUBRICATION (cont.)
Apply Makita grease FA No.2 to the following portions designated with the black triangle to protect
parts and product from unusual abrasion.
Gear and Reciprocation Mechanisms
Item No. Description
Slider
Slider support
Whole surface
Inside surface where Slider reciprocates. Apply approx. 12g.
Portion to lubricate
Plane bearing 14A
Crank base complete
Bearing box
24
Gear housing Gear room where (37) Torque limiter rotates. Apply approx. 15g.26
20
27 Bearing complete Circumference of Ball bearing portion which contacts (45) Crank cam complete
Torque limiter Teeth portion37
45 Crank cam complete Boss on which (52) Needle bearing 710 is installed
47 Counterweight Surface that contacts Crank cam complete
Surface which contacts (48) Ring 21B49 Bearing retainer B
52 Needle bearing 710 Outer surface of the outer ring which contacts the slider block of (24) Slider
Fig. 2
Slider block

P 4 / 15
Repair
[2] -2. ADHESIVE APPLICATION
Apply adhesive to the following screws to prevent them from loosening.
Plate B
Plate A
Slider
Plane bearing A Bearing complete
Shoe guide
Bearing retainer B
Gear housing cover
Slider support complete
Crank cam complete
Crank base complete
(29) (42)
(44)
(51)
(39)
(15)
Item No. Description
Hex socket head bolt M5x16 (4 pcs) Tightening Plate A and B
Securing Shoe guide
Securing Bearing retainer B
Securing Gear housing cover
Securing Crank cam complete to Crank base complete
Countersunk head screw M6x16 (1 pc)
Pan head screw M5x16 (4 pcs)
Hex socket head bolt M6x14 (1 pc)
Pan head screw M5x16 (4 pcs)
Apply for
Fig. 3
Counter weight

P 5 / 15
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Disassembling/ Assembling Blade Clamp Section
1) Remove shoe. If the blade clamp section is positioned inside
gear housing, pull it out of gear housing. (Fig. 4)
2) After removing protector, remove retaining ring S-18 with
Retaining Ring S and R Pliers (No.1R291).
Then remove the following parts:
Driving sleeve, Shoulder pin 5, Compression spring 6,
Pin 3 (of 6mm length), Guide sleeve, Driving sleeve guide
Now sleeve appears. (Fig. 5)
3) Because sleeve is locked, release it
by pulling in the direction of the blade
installation side. (Fig. 6)
DISASSEMBLING Fig. 4
Shoe
Blade clamp section
Fig. 5
Driving sleeve
Shoulder pin 5
Compression spring 6
Driving sleeve guide
Pin 3
(of 6mm length) Guide sleeve
Sleeve
Protector
Retaining ring S-18
4) While putting your finger on the top of slider to close the slit of slider, remove pin 3 (of 19.8mm length) by pushing
with a thin bar. (Fig. 7)
Note: Be sure to put your finger on the top of slider or push plate will pop out from the slit of slider.
5) Remove sleeve and torsion spring 17 from slider, then take push plate and compression spring 2 out of the slit of
slider. (Fig. 8)
Push plate
Compression
spring 2
Sleeve
Slider
Torsion
spring 17
Fig. 7 Fig. 8
Slider
Sleeve
thin bar
Pin 3
(of 19.8mm length)
Fig. 6
Sleeve
(Pull in the direction of
the blade installation side.)
Pin 3 is positioned
at the lower end of
the groove on sleeve
when sleeve is released.
groove
[Sleeve Locked] [Sleeve Released]
Pin 3 (of 19.8mm length)

P 6 / 15
Repair
[3] -1. Disassembling/ Assembling Blade Clamp Section (cont.)
ASSEMBLING
Fig. 10
1) Assemble torsion spring 17 to slider as illustrated in Fig. 9.
Important: Be sure that torsion spring 17 is not reversible when assemble to slider.
Follow the instruction described in Fig. 9.
2) Insert compression spring 2 into the slit of slider.
3) Install sleeve on slider and lock pin 3 temporarily by turning sleeve clockwise. (Fig. 10)
4) Mount guide sleeve temporarily, and put push plate into the slit of slider as illustrated to left in Fig. 11.
Important: Be sure that push plate is not reversible when installed.
While pushing push plate straight into slider with recipro saw blade, insert pin 3 (of 19.8mm length) through the hole
of push plate as illustrated to right in Fig. 11. And then remove guide sleeve.
Note: Guide sleeve is used as a jig, not assembled to slider yet in this step.
Pin 3
(of 19.8mm length) Sleeve
Slider
Fig. 11
This projection must
face the blade side.
Push plate
Guide sleeve
Recipro saw blade
Fig. 9
Insert this end
into the slit of
slider.
This end has to
be positioned
on the cap side.
Shift button
Slider
Torsion spring 17
Cap
[Side view of cap]
Cap has an insert hole
for shift button.
Pin 3
(of 19.8mm length)
While pushing recipro saw blade,
insert pin 3 through
the hole of push plate.

P 7 /15
Repair
[3] -1. Disassembling/ Assembling Blade Clamp Section (cont.)
Fig. 12
5) While fitting the two projections of driving sleeve in the concavities of sleeve, push driving sleeve into gear housing.
At this time, turn driving sleeve clockwise so that the protruding portion of driving sleeve cannot be interfered by
gear housing. After driving sleeve is pushed into gear housing to the full, turn driving sleeve clockwise to lock pin 3
in place. (Fig. 12)
Note: Driving sleeve is used as a jig to lock pin 3 in place, not assembled to slider in this step.
6) Remove driving sleeve.
7) Assemble the following parts to slider (Refer to Fig. 5.):
Driving sleeve guide, Guide sleeve, Pin 3 (of 6mm length), Shoulder pin 5, Compression spring 6
8) Put driving sleeve over guide sleeve and secure it with retaining ring S-18 using 1R291. Then cover driving sleeve
with protector. (When installing driving sleeve, fit its projections in the concavities of sleeve and driving sleeve guide.)
Projections
Concavities
Driving sleeve Driving sleeve
Sleeve
Sleeve
[3] -2. Replacing Shift Button and Cap
Shift button can be removed from gear housing cover by
inserting a thin bar into the hole of cap and push the bar.
(Fig. 13)
DISASSEMBLING
ASSEMBLING
Fig. 13
Shift button
thin bar
Cap
Fig. 14
1) Replace cap by new one because removal of shift button
damages the inside surface of cap.
2) From shift button, remove all the plastic dust scraped off
the removed cap. Insert shift button through the holes in
the both sides of gear housing cover.
And then press-fit shift button in the new cap by hand.
Important:
Be sure to assemble shift button to gear housing cover
so that the two notches of shift button face the side
opposite to slider as illustrated in Fig. 14.
These notches of shift button must
face the side opposite to slider.
Slider
Shift button
Cap

P 8/ 15
Repair
[3] -3. Disassembling/ Assembling Slider
DISASSEMBLING
1) After removing shoe and insulation cover, remove the blade clamp section. (Refer to [3]-1.)
2) Separate gear housing cover from gear housing by removing four M5x16 pan head screws (adhesive). (Fig. 15)
3) Remove stop ring E-6, and then take off lever 20 from gear housing cover. (Fig. 15)
4) Remove another stop ring E-6 from the end of pin 7 as illustrated above in Fig. 16.
Applying Round bar for arbor 6-50 (No.1R280 ) to the same end of pin 7, push it with arbor press.
Now pin 7 can be removed from gear housing cover as illustrated below in Fig. 16.
5) Separate slider section (slider support, seal plate 14, plane bearing 14A, slider, slide plate, bearing complete,
plates A and B) from gear housing cover. (Fig. 17)
6) Remove plates A and B by unscrewing four M5x16 hex socket head bolts. ( Fig. 18)
Gear housing cover
Gear housing cover
Round bar for arbor
6-50 (No.1R280)
Pin 7
Pin 7
Stop ring E-6
Fig. 16
Fig. 18
Gear housing cover
Be careful not to lose the two compression springs
illustrated above because they are important parts for
orbital mechanism.
Fig. 17
Slider section
Compression spring 5
Slider support
Slider
Plate A securing
Plane bearing 14A
Hex socket head
bolt M5x16
Slider
Plate B securing
Bearing complete
Bearing
complete
Slider support
Pan head screw M5x16
(adhesive-coated)
Gear housing cover
Gear housing
Pan head screw M5x16
(adhesive-coated)
Lever 20
Plate C
Stop ring E-6
Fig. 15

P 9/ 15
Repair
7) While raising the end of bearing complete side, remove slider from slider support by pulling in the direction
of the arrow. (Fig. 19)
8) Remove X ring 14 from slider support. (Fig. 19)
1) Install X ring 14 on slider support. (Refer to Fig. 19.)
2) Put bearing complete on the motor side-end of slider, and plane bearing 14A on the blade side-end of slider. (Fig. 20)
Important: Bearing complete and plane bearing 14A are both not reversible when assembled to slider.
Be sure to place them so that the rib on bearing complete/ plane bearing 14A faces toward the motor side.
3) Mount slider to slider support. (Refer to Fig. 19.)
4) Fasten plate A and plate B to slider support as illustrated to left in Fig. 21.
5) Mount compression spring 5 (2 pcs) to slider support as illustrated to right in Fig. 21.
[3] -3. Disassembling/ Assembling Slider
DISASSEMBLING
ASSEMBLING
Fig. 19
Bearing complete
Slider
Plane bearing 14A
Fig. 20
Fig. 21
X ring 14
Plane bearing 14ABearing complete
Blade sideMotor side
Slider block Slider
Plate A securing
plane bearing 14A
Plate B securing
bearing complete
Slider support
Slider support
Compression spring 5
Slider support
rib rib

P 10/ 15
Repair
[3] -3. Disassembling/ Assembling Slider (cont.)
[3] -4. Replacing Torque Limiter Complete
6) Assemble slider support to gear housing cover complete as illustrated in Fig. 22.
1) After removing insulation cover and shoe, separate gear housing cover complete from gear housing. (Fig. 15)
It is not necessary to remove lever 20 and pin 7.
2) Remove bearing box from gear housing by unscrewing three M5x16 pan head screws (adhesive-coated),
then the hexagon hole of torque limiter will be visible. (Fig. 23)
3) Secure crank cam complete in vise, then insert hex wrench into the hexagon hole. By turning the hex wrench
counterclockwise, torque limiter can be disconnected from crank base complete of the crank section. (Fig. 24)
CAUTION:
Never use impact driver for turning the hexagonal hole of torque limiter or you may alter the factory-adjusted
torque setting.
4) Separate crank cam complete and crank base complete from torque limiter.
Fig. 22
Slider support
While pressing slider support toward
the direction designated with the
black arrow, insert lever 20 through
gear housing cover complete.
Make sure that two O rings are
assembled to lever 20 before
assembling the lever to gear
housing cover complete.
Lever 20
Plate C
Pin 7
Insert pin 7 through gear housing
cover complete and slider support
from the same side of lever 20.
Gear housing cover complete
Stop ring E-6
Stop ring E-6
Slider
Fig. 23 Fig. 24
Compression spring 5
Pan head screw M5x16
(adhesive-coated)
Bearing box
Gear housing
Hexagon hole
of torque limiter Vise plate
(No.1R041)
Crank cam complete
Crank cam complete Note: Use Vise Plate (Copper) (No.1R041)
to protect crank cam complete.
Turn counterclockwise for loosening.
DISASSEMBLING
ASSEMBLING
Vise plate
(No.1R041)

P 11/ 15
Repair
[3] -4. Replacing Torque Limiter Complete
4) After separating crank section from torque limiter complete, remove torque limiter complete from gear housing
by pressing down with arbor press and Round bar for arbor 16-100 (No.1R245). (Fig. 25)
5) Unscrew four M5x14 torx socket head screws (adhesive-coated) using Torx Driver T25H120 (No.1R327),
and then remove guide plate from gear housing.
Turn over the tool, and now ball bearing 6003LLB can be removed from gear housing by pressing down with
arbor press and Round bar for arbor 20-100 (No.1R247). (Fig. 26)
Ball bearing
6003LLB
Round bar
for arbor 20-100
(No.1R247)
Fig. 26
Crank section Torque limiter
complete
Fig. 25
Fig. 27
Round bar
for arbor 16-100
(No.1R245)
Torque limiter
complete
DISASSEMBLING
ASSEMBLING
Do the reverse of the disassembling steps.
Note:
1) Tighten torx socket head screw M5x14 with Torque wrench shaft
2-6N.m (No.1R254) to the recommended torque of 2.9-5.9N.m
(30-60 kgf.cm).
2) Counterweight is not reversible when assembled to gear housing.
As illustrated in Fig. 27, be sure to place it so that the two
protrusions faces towards the direction of motor housing.
3) When fastening torque limiter complete, tighten with Torque
wrench shaft 20-90N.m (No.1R223) to the recommended torque
of 29.4-39.2N.m (300-400 kgf.cm).
Torx Driver T25H120
(No.1R327)
Torx socket head
screw M5x14
(adhesive-coated)
Guide plate
Ball bearing 6003LLB
Motor housing
Counter weight
Gear housing
Projections

P 12/ 15
Repair
1) After removing insulation cover and shoe, separate gear housing cover complete from gear housing. (Fig. 15)
It is not necessary to remove lever 20 and pin 7.
2) Remove carbon brush. Separate motor housing from gear housing by removing four 5x35 tapping screws that fasten
gear housing to motor housing.
3) Remove baffle plate. (Fig. 28)
4) By removing three M5x8 hex socket head bolts, armature can be separated from gear housing. (Fig. 29)
[3] -5. Replacing Armature
Baffle plateGear housing
Fig. 28
Hex socket head bolt M5x8
(adhesive-coated)
Hex socket head bolt M5x8
(adhesive-coated)
Armature
Fig. 29
DISASSEMBLING
ASSEMBLING
5) Remove retaining ring S-12 with Retaining Ring
S and R Pliers (No.1R291).
Now the flat washer 12 on the gear housing side
can be removed. (Fig. 30)
6) By removing ball bearing 6001DDW with
Bearing Extractor, small (No.1R269), the flat washer 12
on the fan side and bearing retainer A can be removed
from armature. (Fig. 30)Retaining
ring S-12
Flat washer 12 (Fan side)
Flat washer 12
(Gear housing side) Bearing retainer A
Ball bearing
6001DDW
Armature
Fig. 30
Do the reverse of the disassembling steps.
Note:
Do not forger to put flat washer 12 (2 pcs) in place. (Fig. 30)

Circuit diagram
P 13/ 15
Choke coil
When Choke Coils Are Used
When Choke Coil Is Not Used
Color index of lead wires' sheath
Black
White
Red
Orange
Clear
Switch
Power supply cord
Blue
Connector
Noise
suppressor
Noise suppressor
Speed control dial
Pick up coil
Controller
Insulated connector
Field
Field
(view from
commutator side)
Insulated connector
Insulated connector
Insulated connector
Insulated
connector
Switch
Power supply cord
Connector
Noise
suppressor Speed control dial
Pick up coil

Controller
Heat-shrink
tube
Fasten this connector
to the field core with
a screw.
(view from
commutator side)
If noise suppressor is used,
connect it with No.2 and No.4
terminal of the switch.

Wiring diagram
P 14 /15
Lead wire (black)
from controller
Lead wire (white)
from controller
Field lead wire
(orange)
Field lead wire
(black)
Field lead wire
(white)
Connecting lead wire (clear),
from field core
Two lead wires
used if choke coil
is used
[1] Wiring in Motor Housing
Lead wire (orange)
from choke coil to
brush holder
Route the following lead wires
through this opening:
Field lead wire (black)
Field lead wire (white)
Pick up coil
Put pick up coil here
after mounting sleeve on it.
Route the connecting lead wire
(clear) through this opening.
If choke coils are used, route the following
lead wires through this opening as well as
Field lead wires (black, white):
Field lead wire (orange)
Lead wire (orange) from choke coil to brush holder
Lead wire (clear)
from noise suppressor
Connecting lead wire (clear)
Heat-shrink tube
Secure connecting lead wire (clear)
to field core with the screw with which
field is secured to motor housing.
[Protecting the Interconnecting Lead Wire with Heat-Shrink Tube]
In case that noise suppressor is used, protect the lead wire that interconnects between noise suppressor and
field core using polyolefin heat-shrink tube. Be sure to cover the crimped portion as illustrated below.
Polyolefin heat-shrink tube
(before shrinkage)
crimped portion
Lead wire (clear) that interconnects
between noise suppressor and
field core
Non-insulated
terminal
Polyolefin heat-shrink tube
(after shrinkage)
[Before shrinkage] [After shrinkage]

Wiring diagram
P 15/ 15
[2] Wiring in Handle
Switch
Controller
Rubber band
Speed control dial
Rib
Noise suppressor
Choke coil
If choke coil is used,
put it here.
Lead wire
holder
Fix lead wires with
lead wire holder.
If noise suppressors
are used, put them here.
Do not route the lead wires
over the ribs.
If rubber band is used,
hold the parts with it.
Be sure that the lead wires from
the opening of motor housing
holder are tight in this portion.
Do not route the lead wires
over the rib.
Route the lead wires to
switch under the switch.