Makita GA5020C User Instructions Download Page 2

P  2/10

R

epair

[2] LUBRICATION

Lubricate the parts below in order to protect parts and product from unusual abrasion.
Put approx. 15g of Makita grease SG No.0 in the gear room of Gear housing.
Apply Makita Grease SG No.0 to the portions designated with the mark of       . (Fig. 1)

[3] DISASSEMBLY/ASSEMBLY

[1] NECESSARY REPAIRING TOOLS

[3] -1. Armature, Small spiral bevel gear

*

2

, Ball bearing 6000DDW

DISASSEMBLING

Fig. 2

Pan head screw
M5x18 (4pcs)

Tapping screw
5x25 (4pcs)

1) After removing Carbon brush, separate Gear housing
    together with Armature from Motor housing complete
    by unscrewing four M5x18 Pan head screws. (Fig. 2)
2) Separate Bearing box from  Gear housing by unscrewing
    four 5x25 Tapping screws. (Fig. 2)

CAUTION: Unplug the machine and remove the wheel and the wheel cover from the machine
                     for safety before repair/ maintenance in accordance with the instruction manual! 

Code No.

1R004

Description

Retaining ring pliers ST-2
[1R291 can be used instead of 1R004.]

Removal/installation of Ring spring 7

1R005

Retaining ring pliers RT-2N

Removing Retaining ring R-30

Removing Large spiral bevel gear*

1

1R045

Gear extractor (large)

1R346

Center attachment for 1R045

Removal/installation of Hex nut M7

Disassembling Shaft lock section

1R039

Armature holder 41.5 [one set required]

1R268

Spring pin extractor M3

1R269

Bearing extractor

Removing Lock sleeve and Lock spring 16

---

Adjustable wrench

Removal/installation of Hex nut M7

---

Wrench 11

Disassembling Shaft lock section

1R350

Ring 60

Use for

Fig. 1

Large spiral bevel gear

Outside surface

Lock spring 16

39

Surface that contacts Large spiral bevel gear

Spindle

49

Item No.

Description

Portion to lubricate

39

49

Bearing box

Motor housing

complete

Gear housing

Removing Ball bearing 696ZZ

*1: Different spiral bevel gears are used by different models
      as follows:
      GA5020C and GA5021C/ Spiral bevel gear 35B
      GA6020C and GA6021C/ Spiral bevel gear 38

*2: Different spiral bevel gears are used by different models
      as follows:
      GA5020C and GA5021C/ Spiral bevel gear 11
      GA6020C and GA6021C/ Spiral bevel gear 11A

Summary of Contents for GA5020C

Page 1: ...l size mm Protection against electric shock Power supply cord m ft Net weight kg lbs GA5020C GA6020C GA5021C GA6021C 125 5 150 6 Australia 2 0 6 6 Other countries 2 5 8 2 2 5 5 5 10 000 9 000 125 5 150 6 10 000 9 000 Double insulation 22 23 7 8 Super Joint System SJS Yes Constant speed control Yes LED power light Yes Soft start Yes Electronic current limiter Yes Anti restart function Yes 120 110 1...

Page 2: ...91 can be used instead of 1R004 Removal installation of Ring spring 7 1R005 Retaining ring pliers RT 2N Removing Retaining ring R 30 Removing Large spiral bevel gear 1 1R045 Gear extractor large 1R346 Center attachment for 1R045 Removal installation of Hex nut M7 Disassembling Shaft lock section 1R039 Armature holder 41 5 one set required 1R268 Spring pin extractor M3 1R269 Bearing extractor Remov...

Page 3: ... 1 Lubricate the gear and Armature shaft with spray lubricant 2 Wrap the gear with cloth to protect the gear teeth 3 Using water pump pliers or the like firmly grip the gear wrapped with cloth then turn the gear 5 In order to remove Ball bearing 6000DDW from Gear housing first remove Retaining ring R 30 using 1R005 then remove Flat washer 20 from Gear housing Fig 5 6 Reassemble Armature to Gear ho...

Page 4: ...g 9 It is not necessary to remove Carbon brushes 2 Remove Ball bearing 6000ZZ using 1R269 Fig 10 Note The gear and the ball bearing can be replaced without disassembling the Motor section 1R269 Ball bearing 696ZZ Bearing box Large spiral bevel gear Gear housing Bearing box 1R004 Ring spring 7 Spindle Slotted screwdriver Bearing box Spindle Large spiral bevel gear 5 Hold Large spiral bevel gear sec...

Page 5: ...ssembled to Spindle Therefore reuse removed Ring spring 7 if it is not damaged Do not forget to fasten Ring spring 7 securely to Spindle using pliers whether it is removed one or new one Note 2 Do as described in Fig 17 when assembling Lock spring 16 and Lock sleeve to Large spiral bevel gear Do the reverse of the disassembling steps Put Lock spring 16 on the hole of Large spiral bevel gear then t...

Page 6: ...Fig 18 DISASSEMBLING Do the reverse of the disassembling steps Note Do not reinstall removed Pin cap because removal of Shoulder pin 5 damages the inside surface of Pin cap Be sure to remove plastic dust of Pin cap from Shoulder pin 5 and to install it onto new Pin cap ASSEMBLING Fig 18 Pin cap Gear housing Shoulder pin 5 Compression spring 8 1R350 1R268 Pin cap Gear housing O ring 7 1R268 1R350 ...

Page 7: ... suppressor is not used for some country Color index of lead wires sheath Black White Orange Noise suppressor Pickup coil Controller GA5020C GA6020C Fig D 2 GA5021C GA6021C black or brown white or blue Field Switch Power supply cord Terminal block Noise suppressor Pickup coil Controller black or brown white or blue red or purple or blue Insulated connector Insulated connector Red ...

Page 8: ... lead wires through this opening Pickup coil to which Sleeve is assembled Motor housing viewed from A rib Pickup coil to Controller Sleeve Before assembling Pickup coil to Motor housing route Lead wires of Pickup coil as described below 1 Route beside the rib of Sleeve 2 Then fix with the lead wire holder of Sleeve 3 Make sure that Lead wires are tight lead wire holder A ...

Page 9: ...roller e f g h 6 Put Noise suppressor in this portion if used 7 Put Insulated connector in this portion Handle GA5020C GA6020C k e f Lead wires of Controller a White to Insulated connector b Black to Terminal block c Red to Terminal block d Orange to No 1 Terminal of Switch e Black to Pickup coil f White to Pickup coil Field lead wires g White to Insulated connector h Orange to No 1 Terminal of Sw...

Page 10: ...side wall of Handle and the rib for fixing Controller e f g h 7 Put Noise suppressor in this portion if used Handle GA5021C GA6021C k e f Lead wires of Controller a White to Insulated connector b Black to No 3 Terminal of Switch c Red or Purple or Blue to No 4 Terminal of Switch d Orange to No 2 Terminal of Switch e Black to Pickup coil f White to Pickup coil Field lead wires g White to Insulated ...

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