Makita M0910B Operating instructions

M0910B

REPAIR MANUAL

Angle Grinder

OFFICIAL USE

For ASC

P 2/ 10

Repair

Apply Makita grease FA. No.2 to the following portions designated with the black triangle to protect parts and product

from unusual abrasion.

[3] DISASSEMBLY/ASSEMBLY

[3]-1. Armature, Spiral bevel gear 13, Ball bearing 629ZZ and Ball bearing 607ZZ

[1] NECESSARY REPAIRING TOOLS

CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.

Code No. Description Use for

[2] LUBRICATION

Fig. 1

Item No. Description

Gear housing complete

O Ring 26

Gear room where Spiral bevel gear 37 engages with Armature’s gear

Whole portion a little

AmountPortion to lubricate

DISASSEMBLING

1R005 Retaining ring pliers RT-2N removing/ mounting Retaining ring R-32

1R026 Bearing setting pipe 16-8.2 removing Spindle from Spiral bevel gear 37

1R217 Ring 22 removing Spindle from Spiral bevel gear 37

1R268 disassembling Shaft lock mechanism

removing Ball bearing 629ZZ/ 607ZZ

Spring pin extractor M3

Bearing extractor1R269

1R281 removing Spindle from Spiral bevel gear 37Round bar for Arbor 7-50

1R291 Retaining ring S & R pliers removing Retaining ring S-12

10 g

2. Disconnect Carbon brush from the commutator

of Armature by moving the tail end of the spiral

spring of Brush holder.

Note: No need to remove Carbon brushes in this step.

Spiral spring

4x22 Tapping

screw (4 pcs.)

Gear housing

complete

Motor housing

1. Separate Rear cover by unscrewing

4x18 Tapping screw. 3. Remove Gear housing complete from Motor housing

together with Armature by unscrewing four 4x22

Tapping screws.

4x18 Tapping screw

Rear cover

(1) Separate Gear housing complete together with Armature from Motor housing as drawn in Fig. 2.

Fig. 2.

Armature

P 3/ 10

Repair

DISASSEMBLING

M6 Hex nut

Flat washer 9

Wrench 10 Spiral bevel gear 13

4. Pull off Armature from Gear

housing complete. 5. Disassemble Spiral bevel gear 13 from Armature by removing

M6 Hex nut with Wrench 10.

(2) Remove Spiral bevel gear 13 and Ball bearings from Armature. (Fig. 3)

6. Remove Ball bearing 629ZZ and Flat washer 9 from the Fan side using 1R269. And then, remove Ball bearing

607ZZ from Commutator end.

Armature

Fig. 3

M6 Hex nut

Ball bearing

607ZZ 1R2691R269 Ball bearing

607ZZ

Ball bearing

629ZZ

Ball bearing

629ZZ

ASSEMBLING

Assemble by reversing the disassembly procedure. (Refer to Figs. 3 and 2.)

Note in assembling:

When Gear housing complete is assembled to Motor housing,

Spindle must be positioned on the opposite side of Switch lever. (Fig. 4)

Fig. 4

Spindle Spindle

[Wrong]

[Rear view]

[Correct] Switch lever

Gear housing

complete

Gear housing

complete

[3] DISASSEMBLY/ASSEMBLY

[3]-1. Armature, Spiral bevel gear 13, Ball bearing 629ZZ and Ball bearing 607ZZ (cont.)

Switch lever

P 4/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-2. Field

DISASSEMBLING

ASSEMBLING

2. Install two 4x22 Tapping screws in the holes on two diagonal

corners of Motor housing. Then remove Field from Motor

housing by tapping on the screw heads alternately.

Note: Do not tap the diagonal corners of Motor housing directly

because the inlaid portion near the diagonal corners is fragile.

1. Disconnect the receptacles from

Brush holders, Terminal block

and Switch. (Refer to Fig. D-1.)

Remove two 4x60 Tapping screws

that secure Field in Motor housing.

Fig. 5

4x22 Tapping screws

(1) Separate gear housing complete together with Armature. (Refer to Fig. 2.)

(2) Remove Filed from Motor housing. (Fig. 5)

Note in disassembling:

Use 4x22 Tapping screws, which are used for fastening Gear housing complete to Motor housing, as a jig

when disassembling Field. (Fig. 5)

Note in assembling:

Field must be mounted to Motor housing so that its Lead wires can be routed out through the openings of Motor housing.

(Refer to Fig. D-2.)

4x60 Tapping screw (2 pcs.)

Fig. 6

M4x16

Pan head screws

Bearing box

1. Unscrew four M4x16 Pan head screws, then separate

Bearing box from Gear housing complete. 2. Remove Retaining ring S-12 with 1R291.

(1) Disassemble Bearing box from Gear housing complete, then remove Retaining ring S-12 from Spindle. (Fig. 6)

[3]-3. Spiral bevel gear 37 and Ball bearing 6201DDW

Retaining ring S-12

DISASSEMBLING

1R291

P 5/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-3. Spiral bevel gear 37 and Ball bearing 6201DDW (cont.)

DISASSEMBLING

Fig. 7

1R026

1R281

1R217

approx.

10 mm

(2) Disassemble Spindle as drawn in Fig. 7.

(3) Disassemble Ball bearing 6201DDW from Bearing box. (Fig. 8)

Bearing box

Spindle

Spiral bevel

gear 37

2. Push Spindle out a little by tapping 1R026

carefully using arbor press with a down stroke

of approx.10mm long. Then remove 1R026.

1. Put Bearing box on 1R217,

then put 1R026 over the

stepped portion of Spindle.

Spindle

Fig. 8

1R005

4. Remove Retaining ring R-32 with 1R005. 5. Remove Ball bearing 6201DDW from Bearing box.

In this step, Flat washer 12 is removed.

Ball bearing 6201DDW

Flat washer 12

Retaining ring R-32

3. Put 1R281 on Spindle.

Then, press 1R281 to

remove Spindle from

Spiral bevel gear 37.

Note:

Do not reuse removed Ball bearing 6201DDW

because it is damaged in this step.

P 6/ 10

Repair

ASSEMBLING

Fig. 9

1R028

Ball bearing

6201DDW

Flat washer 12

Spindle

1R217

1. Mount Flat washer 12

on Spindle. 2. Set Spindle on 1R217, then set new

Ball bearing 6201DDW and 1R028

as drawn below. Then press-fit the

ball bearing on Spindle.

Note: Do not reuse the removed Ball

bearing 6201DDW.

Bearing box

1R005

Ball bearing 6201DDW and Spiral bevel gear can be assembled as described in Fig. 9.

1R028

4. Install Retaining ring R-32 with 1R005 to secure Ball

bearing 6201DDW.

Then, apply a little amount of Grease/ Lubricant* to

the drum portion of Spindle.

Retaining ring R-32 Spiral bevel

gear 37

6. Install Retaining ring S-12 with 1R291.

Spindle

3. Set Bearing box on 1R217,

then set 1R028 on Spindle

as drawn below.

Then press-fit Spindle into

Bearing box by pressing 1R028

with arbor press.

1R028

Bearing box

Spindle

*Important:

Grease/ Lubricant is necessary for

smooth press-fitting of Spiral bevel

gear 37 onto Spindle without tilting

in the next step 5.

5. Set Bearing box on 1R217, then set 1R028 on

Spiral bevel gear 37 as drawn below.

And then, press-fit the Gear on Spindle of

Bearing box while keeping Spiral bevel gear 37

in parallel with 1R217.

1R217

Bearing box

[3] DISASSEMBLY/ASSEMBLY

[3]-3. Spiral bevel gear 37 and Ball bearing 6201DDW (cont.)

P 7/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-5. Shaft lock

DISASSEMBLING

(1) Separate Gear housing complete and Armature from Motor housing. (Refer to Fig. 2)

(2) Pull off Armature from Gear housing complete. (Refer to Fig. 3)

(3) Remove Bearing box by unscrewing four M4x16 Pan head screws. (Refer to Fig. 6)

(4) Disassemble Shaft lock mechanism as described in Fig. 10..

1. Put Gear housing complete on 1R258.

Insert 1R268 through the small hole of Pin cap onto

Shoulder pin 4. And then, remove Shoulder pin 4 from

Gear housing complete by tapping 1R268 with hammer.

2. Slowly remove 1R268 from Pin cap.

Be careful not to lose Compression spring 8

as the compressed spring may fly away.

Shoulder pin 4

Pin cap

Compression spring 8

Fig. 10

1R268

1R258

Pin cap

plastic dust

Shoulder pin 4

ASSEMBLING

Assemble Shaft lock. (Fig. 11)

Fig. 11

3. Assemble Compression spring 8

and new Pin cap by pressing them

to Shoulder pin 4.

2. Insert Shoulder pin 4 through

the hole of Gear housing

complete.

Pin cap

Compression

spring 8

Shoulder pin 4

Note: Do not reuse the removed Pin cap.

1. Remove the plastic dust

from Shoulder pin 4 that

all the plastic dust produced

in the disassembling process.

Note: Do not reuse the Pin cap removed

from Gear housing complete, because

the inside surface of Pin cap is damaged

by Shoulder pin 4 when it is removed.

Circuit diagram

Wiring diagram

P 8/ 10

Fig. D-1

Fig. D-2 Fig. D-3

White

Red

Blue

Brown

Field

[viewed from

Rear cover side]

Power supply cord

Noise suppressor

Brush holder A Name plate

side

maktec logo

side Brush holder B

Closed end splice is used

for some countries instead

of Terminal block.

Terminal block

The space for Switch Marking

[Top]

[Bottom]

Fasten each Insulated terminals of Lead wires to Switch

so that the wire connection portion is positioned to the

bottom. And set Switch facing its Marking to the top.

Motor housing viewed

from Rear cover side

Wiring in Motor housing

Guide out Field lead wires from the opening

of Motor housing as drawn below.

Switch

Colour index of lead wires' sheath

Black

Wiring to Switch

Switch lever

Insulated

terminals

maktec logo

side

maktec

logo

Name plate

side

Noise suppressor is not used

for some countries.

White lead wire is used

for some countries

instead of Blue.

Black lead wire is used

for some countries

instead of Brown.

[ ]

Insulated terminal (M4)

Circuit of Switch

* AWG: American Wire Gauge

20 AWG*

18 AWG*

Magnet wire

Straight receptacle

(without lock,

#110, t=0.8mm)

Magnet wire or

Lead wire (18 AWG*)

Wiring diagram P 9/ 10

Fig. D-4

Top view

Lead wire holder

Terminal block

Switch

Rib C

Rib D

Route Field lead wire (white) to

Terminal block through the space

between Ribs B and C as well as

C and D.

Rib B

Rib A

Switch

Closed end splice

When Terminal block is used

When Closed end splice is used

Route Field lead wires (white,

black) inside of Rib A.

When fixing Lead wires in this

Lead wire holder, Field lead

wire (white) must be put over

Field lead wire (black).

Lead wire holder

Pull out Field lead wires (white, black)

so that they are tightened in Motor

housing and put the slack portion of

White lead wire in this place.

When fixing Lead wires in this

Lead wire holder, Field lead

wire (white) must be put over

Field lead wire (black).

Pull out Field lead wires (white, black)

so that they are tightened in Motor

housing and put the slack portion of

these lead wires in this place.

Wiring diagram

P 10/ 10

Fig. D-5

Fig. D-6

Switch

Rib D

Ribs F

Field lead wire (red)

Route Field lead wires

(black, red) inside of

Ribs F.

Rib A

Rib E

Noise suppressor

Route Field lead wires (black,

red) inside of Rib F.

Rib F

Groove

Rib D

Rib E

Left side view

Bottom view

Right side view

Route Lead wires of

Power supply cord

inside of Rib E.

Route Lead wires of Field

(red), *Noise suppressor

(white) inside of Rib D.

*Noise suppressor is not used for some countries.

Route Field lead wires

(white, black) inside of

Rib A.

Route Lead wires of Power

supply cord inside of Rib E.

Put Noise suppressor to

Motor housing while facing

its Lead wires connecting

portion to this side.

When fixing Field lead wires

in this groove, Red lead wire

must be put over black lead wire.

Pull out Field lead wires (red, black)

so that they are tightened in Motor

housing and put the slack portion of

Red lead wire in this place.

Route Lead wires of Field

(red), *Noise suppressor

(white) inside of Rib D.

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