Makita M0900B Repair Manual Download Page 10

Page: 10 / 13

ircuit diagram

P 10/ 13

Fig. D-2

White
Red

Blue

Brown

Field,

viewed from

Rear cover side

Power supply cord

Terminal block

(Closed end splice

is used for some

countries instead

of Terminal block.)

Brush holder A

Brush holder B

Switch

Color index of lead wires' sheath

Black

Insulated terminal (M4)

For countries where suppression of radio interference is not required

Blue/White

Brown/Black

*AWG: American Wire Gauge

18 AWG*

Magnet wire

Straight receptacle

(Without lock,

#110, t=0.8mm)

Straight receptacle

(Without lock,

#110, t=0.8mm)

Circuit of Switch

Summary of Contents for M0900B

Page 1: ...M0900B REPAIR MANUAL Angle Grinder OFFICIAL USE For ASC ...

Page 2: ...d Bar for Arbor 7 50 removing Spindle from Spiral bevel gear 37 removing Switch knob from Switch lever Apply the following lubricants to protect parts and product from unusual abrasion Fig 1 DISASSEMBLING 1 Remove Rear cover then disconnect Carbon brush from Armature s commutator Fig 2 Fig 2 4x22 Tapping screw 4 pcs Rear cover Armature Gear housing complete 1 Remove Rear cover by unscrewing one 4x...

Page 3: ...ith Wrench 10 2 Remove Spiral bevel gear 13 Ball bearings from Armature Fig 3 Do the reverse of the disassembling steps Note in Assembling When Motor housing and Gear housing complete are joined together Spindle must be positioned on the opposite side of Switch knob Fig 4 6 Using 1R269 remove Ball bearing 629ZZ and Flat washer 9 from the Fan side then Ball bearing 607ZZ from Commutator end Armatur...

Page 4: ...ng Fig 5 Fig 6 4x22 Tapping screw M4x16 Pan head screw Bearing box 1 Unscrew four M4x16 Pan head screws then separate Bearing box from Gear housing complete 1 Separate gear housing complete together with Armature as illustrated in Fig 2 2 Remove Filed from Motor housing Fig 5 1 Disassemble Bearing box from Gear housing complete then remove Retaining ring S 12 from Spindle Fig 6 Note in Assembling ...

Page 5: ...lly using arbor press with a down stroke of approx 10mm long Then remove 1R026 3 Put Bearing box on 1R217 then put 1R026 over the stepped portion of Spindle Spindle Fig 8 1R005 6 Remove Retaining ring R 32 with 1R005 7 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 5 Put 1R281 on Spindle Then using arbor p...

Page 6: ...ll Retaining ring R 32 with 1R005 to secure Ball bearing 6201DDW 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 Apply lubricant to this portion of Spindle for smooth press fittin...

Page 7: ...om the toggle of Switch 1 Remove Rear cover Fig 2 2 Switch lever can now be disassembled as described in Fig 10 toggle of Switch Switch knob Switch lever Switch Knob and Switch lever can be mounted in place as described in Fig 11 Switch knob 1R281 Motor housing Switch knob Switch lever 1 Insert Switch lever into Motor housing until the square loop of Switch lever s front end is seen through the Sw...

Page 8: ...in 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 12 1R268 1R258 Pin cap plastic dust Shoulder pin 4 ASSEMBLING Assemble Shaft lock Fig 13 Then do the reverse of the disassembling steps Fig 13 3 Assemble Compression spring 8 and new Pin cap by pressing them to Shoulder pin 4 2 Insert Shoulder pin 4 through the h...

Page 9: ... instead of Terminal block Brush holder A Brush holder B Switch Color index of lead wires sheath Black 1 2 Insulated terminal M4 For countries where suppression of radio interference is required Blue White Brown Black 20 AWG 20 AWG AWG American Wire Gauge 18 AWG Magnet wire Magnet wire Magnet wire Straight receptacle Without lock 110 t 0 8mm Straight receptacle Without lock 110 t 0 8mm Circuit of ...

Page 10: ... Terminal block Brush holder A Brush holder B Switch Color index of lead wires sheath Black 1 2 Insulated terminal M4 For countries where suppression of radio interference is not required Blue White Brown Black AWG American Wire Gauge 18 AWG Magnet wire Magnet wire Straight receptacle Without lock 110 t 0 8mm Straight receptacle Without lock 110 t 0 8mm Circuit of Switch 1 2 ...

Page 11: ...d lead wire black to Brush holder Pass Field lead wires through these openings Note The wires must be tight in Motor housing Wiring of Field Lead Wires Wiring diagram Fig D 3 Fig D 4 Connect Insulated connectors of Lead wires to Switch from the maktec logo side of Motor housing Switch Insulated terminal Motor housing Wiring to Switch Motor housing viewed from Rear cover side ...

Page 12: ...Noise suppressor Closed end splice Closed end splice rib a rib b Fix Field lead wire red in these two grooves Fix Field lead wire red in these two grooves Be sure to route all of the Lead wires inside of the ribs a to d as drawn below to prevent the wires from being pinched between Motor housing and Rear cover Put Terminal block Closed end splice in place as drawn below When Terminal block is used...

Page 13: ...slack portion of Lead wires of Power supply cord in this place Noise suppressor Switch lever When fixing Lead wires in this Lead wire holder Field lead wire white must be put over Field lead wire black and Noise suppressor s Lead wire white Route Noise suppressor s Lead wire white between the boss and the rib ...

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