Makita JR3050T Manual

Continuous Rating (W)
Voltage (V)
Stroke per minute: min-1
Variable speed control
Net weight: kg (lbs)
Power supply cord: m (ft)
For North America:
Recipro saw blade for steel ...................... 1
Recipro saw blade for composites.......... 1
For countries other than North America:
Recipro saw blade No.21 for steel ................................. 1
Recipro saw blade No.22 for steel ................................. 1
Recipro saw blade No.23 for wood and plywood .......... 1
Capacity *Wood: mm (")
Pipe: dia. mm (")
Length of Stroke: mm (")
Cycle (Hz) Input Output Max. Output(W)
110
0 - 2,800
28 (1-1/8)
255 (10)
130 (5-1/8)
3.2 (7.1)
Europe: 4.0 (13.1)
Australia: 2.0 (6.6)
Other countries: 2.5 (8.2)
Yes
120
220
230
240
9.0
9.0
4.8
4.6
4.4
50 / 60
50 / 60
50 / 60
50 / 60
50 / 60
940
1,010
1,010
1,010
1,010
390
460
550
550
550
950
950
950
950
950
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 / 12
JR3050T
Recipro Saw
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 452 (17-3/4)
97 (3-13/16)
170 (6-11/16)
Recipro saw blade No.21 for steel
Recipro saw blade No.22 for steel
Recipro saw blade No.24 for steel
Recipro saw blade No.23 for wood and plywood
Recipro saw blade No.23B for wood and plywood
Model JR3050T has been developed as a successor model of
Model JR3000V/VT, featuring the following main advantages;
1. Cutting efficiency higher than competitions and the
predecessor models of Makita recipro saws.
2. Great convenience provided by;
*Tool-less blade change
*Tool-less adjustable heavy duty shoe
*when cutting with the supplied 300mm (11-3/4") length recipro saw blade.
H
L
W

P 2 / 13
Repair
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the saw blade from the machine for safety before repair/ maintenance !
Code No.
1R250
---
Round bar for arbor 26-100
Recipro saw blade
1R327 Torx screwdriver T25H120
1R314 Torx bit VT-25
1R232 Pipe 30
1R245 Round bar for arbor 16-100
1R269 Bearing extractor (small)
Press-fitting Oil seal 14
Setting Pin 3 (of the blade clamp section) in place
Installing/removing Torx countersunk head screw
Installing/removing Torx countersunk head screw
Installing/removing Needle bearing 1216
Installing/removing Needle bearing 1216
Removing Ball bearing 6001DDW
Descriptions Purpose
1R291 Retaining ring S and R Pliers Installing/removing Retaining rings S-18 and S-12
Item No. Part description
18 Gear housing cover
6 Shoulder pin 5
The portion where Slider reciprocates
The surface which contacts the hole on Guide sleeve
47
28, 32
Gear housing
46 Three M5x10 Pan head screws
Four M5x16 Pan head screws
The portion where Gear complete and Armature gear rotate
Threaded portion (in order to prevent Plates from loosening)
33, 35 Four M5x14 Torx countersunk
head screws Threaded portion (in order to prevent Gear plates from loosening)
Threaded portion (in order to prevent Bearing retainer from loosening)
29 Slider The portion where Plane bearings contact when Slider reciprocates
39 Flat washer 18 The portion where Gear complete contacts
Where to lubricate or apply adhesive
Pin 12 to which Needle bearing 1216 is assembled
Fig. 1
Guide sleeve
Plane bearing
Plane bearing
Gear plate Gear complete
Needle bearing 1216
Pin 12
Bearing
retainer
[2] LUBRICATION AND ADHESIVE
See Fig. 1 below.
Lubrication: Apply Makita Grease N. No.1 to the portions designated with the mark of .
Adhesive: Apply Threebond 1321B/1342 or Loctite 242 to the portions designated with the mark of .
[Lubrication]
[Adhesive]

P 3 / 12
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. 2)
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. 3 )
3) Because sleeve is locked, release it
by pulling in the direction of the blade
installation side. (Fig. 4)
DISASSEMBLING Fig. 2
Shoe
Blade clamp section
Fig. 3
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. 5)
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. 6)
Push plate
Compression
spring 2
Sleeve
Slider
Torsion
spring 17
Fig. 5 Fig. 6
Slider
Sleeve
thin bar
Pin 3
(of 19.8mm length)
Fig. 4
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 4 / 12
Repair
[3] -1. Disassembling/ Assembling Blade Clamp Section (cont.)
ASSEMBLING
Fig. 8
1) Assemble torsion spring 17 to slider as illustrated in Fig. 7.
Important: Be sure that torsion spring 17 is not reversible when assemble to slider.
Follow the instruction described in Fig. 7.
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. 8)
4) Mount guide sleeve temporarily, and put push plate into the slit of slider as illustrated to left in Fig. 9.
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. 9. 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. 9
This projection must
face the blade side.
Push plate
Guide sleeve
Recipro saw blade
Fig. 7
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 5 / 12
Repair
[3] -1. Disassembling/ Assembling Blade Clamp Section (cont.)
Fig. 10
5) While fitting the two projections of driving sleeve in the concavities of sleeve, push driving sleeve into gear housing
housing. At this time, turn driving sleeve clockwise so that the protruding portion of driving sleeve cannot be inter-
fered 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. 10)
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. 3.):
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. 11)
DISASSEMBLING
ASSEMBLING
Fig. 11
Shift button
thin bar
Cap
Fig. 12
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. 12.
These notches of shift button must
face the side opposite to slider.
Slider
Shift button
Cap

P 6 / 12
Repair
[3] -3. Disassembling/ Assembling Slider
Fig. 13 Fig. 14
1) Remove shoe and insulation cover.
2) Remove the blade clamp section. (Refer to [3] -1.)
3) Separate gear housing cover from gear housing by removing two M5x25 pan head screws
and two M5x35 pan head screws.
4) Remove two plates from gear housing cover by unscrewing four M5x16 pan head screws. (Fig. 13)
5) From slider, remove the plane bearing 14 on the motor housing side.
6) Move slider towards the motor housing side. Then remove slider from gear housing cover by pulling in the direction
designated by the gray arrow. (Fig. 14)
DISASSEMBLING
ASSEMBLING
Do the reverse of the disassembling steps.
1) Apply Makita grease N No.1 to slider as illustrated in Fig. 15 in order to lubricate X ring 14 and plane bearings 14.
2) Plane bearings 14 are not reversible when assembled to slider. Be sure to install them as illustrated in Fig. 16.
3) Do not forget to install seal ring when assembling gear housing cover to gear housing.
Notes:
Pan head screw M5x16
(adhesive-coated type)
Plate
Gear housing cover
Plate
Slider
While lifting up slider,
pull it off from gear housing
cover.
Fig. 15 Fig. 16
Apply Makita grease N No. 1 here.
(Blade side) (Motor housing side)
brim brim
Move slider towards
the motor housing side.

P 7 / 12
Repair
[3] -4. Replacing Oil Seal 14 and X Ring 14
Fig. 17
1) Separate gear housing cover from gear housing as described in 1) to 3) of [3] -3.
2) Remove oil seal 14 by hitting from the motor housing side using slotted screwdriver and plastic hammer.
Then remove X ring 14 by pushing with finger. (Fig. 17)
DISASSEMBLING
ASSEMBLING
Put X ring 14 in place. And then press-fit oil seal 14 using arbor press and Round bar for arbor 26-100 (No.1R250)
as illustrated in Fig. 18.
Important:
1. Oil seal 14 is not reversible when assembled to gear housing cover. Be sure to set it so that the rubber lip faces
the blade side as illustrated in Fig. 19.
2. Install oil seal 14 so that it is flush with the surface of gear housing cover. (Fig. 19)
3. Do not reuse the removed oil seal because the rubber lip is damaged when removed from gear housing cover.
rubber lip
Oil seal 14
X ring 14
X ring 14
Gear housing
cover
Slotted screwdriver
Fig. 18 Fig. 19
X ring 14
Arbor press
Oil seal 14
Round bar for
arbor 26-100
(No.1R250)
(Motor housing side)
(Blade side)
Gear housing cover
Oil seal 14
X ring 14
(Motor housing side)
(Blade side)

P 8 / 12
Repair
[3] -5. Gear Complete
[3] -6. Replacing Armature
Fig. 20 Fig. 21
Fig. 24
1) Separate gear housing from gear housing cover as described in 1) to 3) of [3] -3.
2) Remove two gear plates from gear housing by unscrewing four M5x14 torx countersunk head screws (adhesive-coated)
with Torx bit VT-25 (No.1R314) or Torx screwdriver T25H120 (No.1R327). (Fig. 20)
Then remove gear complete from gear housing. (Fig. 21)
1) Remove carbon brushes, shoe and insulation cover.
2) Remove gear housing cover from gear housing as described
in 1) to 3) of [3] -3.
3) Separate gear housing from motor housing by unscrewing
four M5x35 tapping screws.
4) Remove baffle plate from gear housing. then remove
armature from gear housing by removing three M5x10 pan
head screws (adhesive-coated) with impact driver. (Fig. 23)
In this step, ball bearing 6001DDW and bearing retainer are
still assembled to armature.
Note: Apply adhesive to three M5x10 pan head screws
when assembling.
DISASSEMBLING
ASSEMBLING
3) Put gear complete on Pipe 30 (No.1R232), and place
Round bar for arbor 16-100 (No.1R245) on needle
bearing 1216. And press out needle bearing 1216
as illustrated in Fig. 22.
Do the reverse of the disassembling steps.
Note:
1. Before assembling gear complete to gear housing,
apply about 1g of Makita grease N No.1 to flat washer 18
and pin 12 respectively. ( Refer to Fig. 20.)
2. Apply adhesive to four M5x14 torx countersunk head screws.
Fig. 22
Fig. 23
Arbor press
No.1R245 Needle bearing 1216
Gear complete
No.1R232
Torx countersunk
head screw M5x14
(4 pcs)
Gear plate
(2 pcs)
Gear complete
Gear complete
Flat washer 18
Needle bearing 1216
Pin 12
5) Remove retaining ring S-12 from armature using Retaining ring S and R pliers (No.1R291), then ball bearing
6001DDW using Bearing extractor (No.1R269). Now bearing retainer can be removed from armature. (Fig. 24)
Bearing retainer
Ball bearing 6001DDW
Retaining ring S-12
Bearing retainer
Armature
Pan head screw M5x10 (3 pcs)

P 9 / 12
Circuit diagram
Black
Clear
Orange
Purple
Color index of lead wires' sheath
Taiwan, and low voltage of Great Britain
All other countries and areas
Field
Noise
suppressor
Field
Field core
Choke coil
Choke coil
*Left
*Right
*Left
*Left
*Right
*Right
Purple
lead wire
Orange
lead wire
Black
Color index of lead wires' sheath
Polyolefin heat-shrink tube
*Left
*Right
Switch
Noise
suppressor

P 10/ 12
Wiring diagram
[1] Protecting the Interconnecting Lead Wire with Heat-Shrink Tube
[2] Wiring in Motor Housing
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 in Fig. 25.
Polyolefin heat-shrink tube
(before shrinkage)
crimped portion
Lead wire (clear) that interconnects
between noise suppressor and
field core
Non-insulated
terminal
Fig. 25
Polyolefin heat-shrink tube
(after shrinkage)
[Before shrinkage] [After shrinkage]
[2] -1. Front Side; Routing the Lead Wire Interconnecting Between Noise Suppressor and Field Core
Fig. 26
(View from baffle plate side)
Secure the non-insulated terminal
of the interconnecting lead wire
with the screw that fastens field
to motor housing.
Polyolefin heat-shrink tube
Lead wire (clear) interconnecting
between noise suppressor and
field core Route the lead wire
through this opening.

P 11/ 12
Wiring diagram
[2] Wiring in Motor Housing (cont.)
[2] -2. Rear side
Fig. 27
Field lead wire (purple)
Lead wire holder
1) Route the following lead
wires through the opening:
*Field lead wire (purple)
*Lead wire from choke coil
to brush holder (purple)
2) Fix the two lead wires with
the lead wire holder.
Be sure that the lead wires
are tight between the opening
and the lead wire holder.
Route the following lead wires
through this opening:
*Field lead wire (orange)
*Lead wire from choke coil
to brush holder (orange)
*Two field lead wires (black)
Opening for lead wires
Lead wire from choke coil
to brush holder (purple)
Field lead wire
(orange)
Field lead wires
(black)
Lead wire (clear)
interconnecting between
noise suppressor and
field core
Lead wire from
choke coil to
brush holder
(orange)
Note: Choke coils are not used except for the following countries:
Taiwan, low voltage of Great Britain

P 12/ 12
Wiring diagram
[3] Wiring in Handle
Choke coil
Fix lead wires with
lead wire holder.
Vinyl tube
Put noise suppressor
in this space.
1) Route the lead wires from
choke coil to brush holder
through the opening.
2) Fix lead wires with the
lead wire holder.
Be sure that lead wires are
tight between the opening
and the lead wire holder.
Route the lead wires
of choke coils
between ribs.
rib
Put insulated connector here.
Put insulated connector here.
Fix lead wires with
lead wire holder.
Note: Choke coils are not used except for the following countries:
Taiwan, low voltage of Great Britain
When choke coils are used,
put the vinyl tube on choke coils,
and fix it with two ribs as illustrated
to right.
rib