P 2/ 14
Repair
CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
[1] NECESSARY REPAIRING TOOLS
Code No. | Description | Use for |
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1R028 | Bearing setting pipe | mounting Gear housing cover to Armature |
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1R045 | Gear extractor (Large) | separate Armature from Gear housing cover |
1R232 | Pipe 30 | removing Coupling and Ball bearing 6903ZZ from large Spiral bevel gear |
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1R258 | V block | supporting Armature and Bearing box |
1R268 | Spring pin extractor M3 | disassembling Shaft lock mechanism |
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1R269 | Bearing extractor | removing Ball bearings 627DDW/ 696ZZ from Armature |
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1R281 | Round bar for Arbor | removing Switch knob from Switch lever |
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1R286 | Round bar for Arbor | removing large Spiral bevel gear section from Bearing box |
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1R291 | Retaining ring S & R pliers | removing Retaining ring |
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1R340 | Bearing retainer wrench | removing Bearing retainer |
1R350 | Ring 60 | supporting Gear housing when disassembling Shaft lock mechanism |
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[2] LUBRICATION
Apply Makita grease to the following portions designated with the black triangle and the gray triangle to protect parts and product from unusual abrasion.
Item No. | Description | Portion to lubricate | Lubricant | Amount |
1 | Gear housing | Gear room | Makita Grease SG No. 0: | 17g |
6 | Gear housing cover | Makita Grease SG No. 0: | a little | |
56 | Outer surface where 58 Coupling contacts | Makita Grease FA No. 2: | a little | |
58 | Coupling | Cylindrical portion where 56 | Makita Grease FA No. 2: | a little |
70 | Spindle | Drum portion where 58 Coupling contacts | Makita Grease FA No. 2: | a little |
Fig. 1 |
| Joint sleeve | 6 |
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| 56 |
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| 58 |
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Spiral bevel gear (large)
Ball bearing 6903ZZ 
70
1
[3]DISASSEMBLY/ASSEMBLY
[3]
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.
Model No. | No load | Smaller spiral bevel gear | Larger spiral bevel gear | ||
speed: min.ˉ¹ | (on armature shaft) | (on spindle) | |||
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GA4041 | GA4541C |
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GA4541 | GA5041C | 11,000 | 10 teeth | 38 teeth | |
GA5041 | GA4543C | ||||
GA4041C GA5043C |
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GA4043C |
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GA6041 |
| 9,000 | 9 teeth | 41 teeth | |
