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epair

Apply Makita grease to the following portions designated with the black triangle and gray triangle to protect parts and

product from unusual abrasion.

[1] NECESSARY REPAIRING TOOLS

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

Code No.

Description

Use for

1R045

Gear extractor (Large)

separate Armature from Gear housing cover

1R049

Drill chuck remover 15

fixing large Spiral bevel gear when removing Spindle

1R050

Drill chuck remover 22

1R232

Pipe 30

removing Cup ring and Ball bearing 6903ZZ from large Spiral bevel gear

1R258

V block

supporting Bearing box

1R268

Spring pin extractor M3

disassembling Shaft lock mechanism

1R269

Bearing extractor

removing Ball bearings 627DDW/ 696ZZ from Armature

1R281

Round bar for Arbor 7-50

removing Switch knob from Switch lever

1R286

Round bar for Arbor 12-50

removing large Spiral bevel gear section from Bearing box

1R291

Retaining ring S & R pliers removing Retaining ring S-9

1R340

Bearing retainer wrench

removing Bearing retainer 20-33 from Bearing box

1R350

Ring 60

supporting Gear housing when disassembling Shaft lock mechanism 

[2] LUBRICATION

Fig. 1

Item No.

Description

Gear housing
C-type plate

Lubricant

Amount

Portion to lubricate

Coupling
Spindle

Model No.

GA4040    GA4540C

GA4540    GA5040C

GA5040    GA4542C

GA4040C  GA5042C

GA6040    GA6042C

GA6040C

Smaller spiral bevel gear

(on armature shaft)

Larger spiral bevel gear

(on spindle)

10 teeth

38 teeth

9 teeth

41 teeth

Gear room

15 g

a little
a little
a little

70

56

1

Joint sleeve

Note

: As listed below, the grinders use different spiral bevel gears, and they are not interchangeable.

          Referring to this list, therefore, be sure to use correct gears for replacement.

Spiral bevel gear (large)

Ball bearing 6903ZZ

56

58

58

Outer surface where  58  Coupling contacts

Drum portion where  58  Coupling contacts

Cylindrical portion where  56  C-type plate contacts 

Makita Grease FA No. 2:

Makita Grease FA No. 2:

Makita Grease FA No. 2:

Makita Grease SG No. 0: 

1

70

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Note in Disassemble (general)

No load 

speed: min.

ˉ

¹

11,000

9,000

Содержание GA4042C

Страница 1: ...150mm for GA6040C GA6042C Optional accessories Depressed center wheels Rubber pads Dust collecting wheel guards Abrasive discs Wire brushes Wheel covers for wire brushes Diamond wheels Abrasive cut off wheels Wheel covers Sanding lock nut etc Specification Continuous Rating W Voltage V Cycle Hz Input Output 840 Max Output W 110 120 220 230 240 13 12 6 7 6 4 6 1 50 60 50 60 50 60 50 60 50 60 1 400 ...

Страница 2: ...S R pliers removing Retaining ring S 9 1R340 Bearing retainer wrench removing Bearing retainer 20 33 from Bearing box 1R350 Ring 60 supporting Gear housing when disassembling Shaft lock mechanism 2 LUBRICATION Fig 1 Item No Description Gear housing C type plate Lubricant Amount Portion to lubricate Coupling Spindle Model No GA4040 GA4540C GA4540 GA5040C GA5040 GA4542C GA4040C GA5042C GA6040 GA6042...

Страница 3: ...to the groove on Gear housing cover Rear cover 2 Shift Spiral spring from Carbon brush top 3 Disconnect Carbon brush from commutator by pulling up Note No need to remove in this step Fig 2 Groove on Gear housing cover Gear housing cover Armature Wrench 10 Flat washer 12 Gear housing cover Ball bearing 6001LLB 5 Remove M6 Hex nut to turn it with Wrench 10 counterclockwise Then remove Flat washer 6 ...

Страница 4: ... Assemble small Spiral bevel gear to Armature end by reversing the disassembly procedure Refer to Fig 2 2 Assemble the commutator end of Armature as drawn in Fig 4 Note This step is required for the models with electronic control system of GA4040C GA4540C GA5040C GA6040C GA4542C GA5042C GA6042C Fig 4 2 Press down Self lock 6 until Wave washer 6 gets flat 3 Magnet sleeve is stabilized between Self ...

Страница 5: ... housing cover Name plate 1 Removing four M4x16 Hex socket head bolts then separate Bearing box section from Gear housing 1 Assemble Gear housing cover together with Armature while facing its notch to the same side as Name plate 2 Assemble Gear housing while facing Spindle to the same side as the notch and Name plate Name plate Gear housing Spindle Bearing box section 2 Remove Ball bearing 696ZZ w...

Страница 6: ...9 Spindle 1R050 Spindle Joint sleeve Bearing retainer Bearing box Flat washer 12 Flat washer 12 4 While applying 1R286 to Flat washer 12 through Bearing retainer press it carefully to remove large Spiral bevel gear section including Coupling and Ball bearing 6903ZZ from Bearing box 1R286 large Spiral bevel gear Ball bearing 6903ZZ Coupling Flat washer 12 1R232 Coupling Ball bearing 6903ZZ large Sp...

Страница 7: ...etainer 20 33 Bearing retainer 20 33 Felt ring 17 Felt ring 17 Flat washer 21 Assemble by reversing the disassembly procedure Refer to Figs 8 7 and 6 Note Do not re use the removed Joint sleeve New Joint sleeve has to be mounted Refer to the upper right illustration in Fig 7 Apply the following thread locker to the thread of M4x16 Hex socket head bolts if the unscrewed bolts are used ThreeBond 134...

Страница 8: ...gly push Switch lever in a direction designated with black arrow 2 Switch lever is disconnected from the locking claw of Switch knob Then remove Switch knob Switch lever Tumbler Switch lever 1R284 Switch knob Switch Switch Switch knob Tumbler of Switch Tumbler of Switch Switch lever Fig 10 Switch knob 2 Fit the hook of Switch knob to the hole of Switch lever Then release Switch lever The hook of S...

Страница 9: ...13 Switch block Controller ASSEMBLING Connect Switch block as drawn in Fig D 3 DISASSEMBLING 3 7 Brush Holder DISASSEMBLING Insert Slotted screwdriver into the gap between Switch and Switch block While fitting the tip of the screwdriver to the side groove of Switch remove Switch by levering it up Remove 3x10 Tapping screw Then insert Slotted screwdrivers into the gap between Motor housing and Brus...

Страница 10: ...ust Pin cap Pin cap Compression spring 8 1R268 1R350 Fig 14 Fig 15 1 Disassemble Bearing box section from Gear housing Refer to Fig 6 2 Disassemble Shaft lock mechanism as drawn in Figs 14 and 15 Fig 16 Fig 17 1 Be sure to use a new Pin cap for replacement and to remove all the plastic dust on Shoulder pin 6 Fig 16 2 Assemble the Parts for Shaft lock mechanism as drawn in Fig 17 Plastic dust O Rin...

Страница 11: ...ath Blue Brown Switch Controller Noise suppressor is installed in Switch block Noise suppressor is not used for some countries Field Brush holder Noise suppressor 7 Black lead wire is used for some countries White lead wire is used for some countries 8 6 1 4 5 2 3 Switch block Switch block Noise suppressor is installed in Switch block Noise suppressor is not used for some countries Black lead wire...

Страница 12: ...ore mounting Switch block to Motor housing make sure that these three Connecting terminals of Switch block are not deformed or broken Put Lead wires of Power supply cord into this place designated with gray color 2 Make sure that these connecting terminals of Switch block fit to Brush holders connecting terminals push Switch block to Motor housing until it stops ...

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