GA6021C-TE, MAKITA Budowa, Instrukcje serwisowe
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//-->TECHNICAL INFORMATIONGA5020C/GA6020C, GA5021C/GA6021CAngle Grinders 125mm (5") /150mm (6")HWLPRODUCTP 1/10Model No.DescriptionCONCEPT AND MAIN APPLICATIONSThese four models have been developed as the most advanced models ofour GA5010 series, featuring a variety of value-adding functions as follows:*Electronic control including;Constant speed control, Soft start, Electronic current limiter,Anti-restart function, LED power light*Super Joint System (SJS)GA5020C/GA6020C use Single-finger trigger while GA5021C/GA6021Cuse Large type trigger.(The image above is GA5020C/GA6020C.)Dimensions: mm (")GA5020C GA6020CModel No.GA5021C GA6021CLength (L)390 (15-3/8)Width (W) 139 (5-1/2) 169 (6-5/8)Height (H)120 (4-3/4)SpecificationGA5020C/GA6020CVoltage (V)120GA5021C/GA6021C110120220230240Model No.DiameterWheel size:mm (") Hole diameterNo load speed: min.-1 =rpmSuper Joint System (SJS)Constant speed controlSoft startElectronic current limiterAnti-restart functionLED power lightSwitch triggerProtection against electric shockPower supply cord: m (ft)Net weight: kg (lbs)Current (A)12.51412.56.96.66.4Cycle (Hz)50/6050/6050/6050/6050/6050/60GA5020C125 (5)10,000Continuous Rating (W)InputOutput---1,0001,450---1,4501,4501,4501,0001,0001,0001,0001,000Max. Output (W)2,2002,2002,2002,6002,6002,600GA6021C150 (6)9,000GA6020CGA5021C150 (6)125 (5)22.23 (7/8)9,00010,000YesYesYesYesYesYesDouble insulationAustralia: 2.0 (6.6), Other countries: 2.5 (8.2)2.5 (5.5)ElectroniccontrolSingle-fingerLarge typeStandard equipmentLock nut wrench 35 .............. 1Lock nut wrench 28 .............. 1Depressed center wheel ......... 1 (125-36 for GA5020C and GA5021C, 150-36 for GA6020 and GA6021C)Side grip (soft grip) ............... 1Toolless wheel cover ............. 1 (if required)Note:The standard equipment for the tool shown above may differ from country to country.OptionalaccessoriesAnti-vibration grip, Dust cover attachment, Loop handle, Toolless wheel coverGA5020C, GA5021C: Accessories for 125mm angle grinderGA6020C, GA6021C: Accessories for 150mm angle grinderP 2/10RepairCAUTION: Unplug the machine and remove the wheel and the wheel cover from the machinefor safety before repair/ maintenance in accordance with the instruction manual![1] NECESSARY REPAIRING TOOLSCode No.1R0041R0051R0451R3461R0391R2681R2691R350------DescriptionRetaining ring pliers ST-2[1R291 can be used instead of 1R004.]Retaining ring pliers RT-2NGear extractor (large)Center attachment for 1R045Armature holder 41.5 [one set required]Spring pin extractor M3Bearing extractorRing 60Adjustable wrenchWrench 11Removal/installation of Hex nut M7Disassembling Shaft lock sectionRemoving Ball bearing 696ZZDisassembling Shaft lock sectionRemoving Lock sleeve and Lock spring 16Removal/installation of Hex nut M7*1:Different spiral bevel gears are used by different modelsas follows:GA5020C and GA5021C/ Spiral bevel gear 35BGA6020C and GA6021C/ Spiral bevel gear 38Use forRemoval/installation of Ring spring 7Removing Retaining ring R-30Removing Large spiral bevel gear*1[2] LUBRICATIONLubricate 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)Item No.3949Fig. 1Large spiral bevel gear39DescriptionLock spring 16SpindlePortion to lubricateOutside surfaceSurface that contacts Large spiral bevel gear49[3] DISASSEMBLY/ASSEMBLY[3] -1. Armature, Small spiral bevel gear*2, Ball bearing 6000DDWDISASSEMBLING1) After removing Carbon brush, separate Gear housingFig. 2together with Armature from Motor housing completeMotor housingby unscrewing four M5x18 Pan head screws. (Fig.2)complete2) Separate Bearing box from Gear housing by unscrewingfour 5x25 Tapping screws. (Fig.2)Tapping screw5x25 (4pcs)Pan head screwM5x18 (4pcs)Bearing box*2:Different spiral bevel gears are used by different modelsas follows:GA5020C and GA5021C/ Spiral bevel gear 11GA6020C and GA6021C/ Spiral bevel gear 11AGear housingP 3/10Repair[3] -1. Armature, Small spiral bevel gear, Ball bearing 6000DDW (cont.)DISASSEMBLING3) Attach one set of 1R039 to vise, then fix Armature in 1R039.Remove Hex nut M7 from the drive-end of Armature shaft by turning it counterclockwise with Wrench 11. (Fig.3)4) Hold Small spiral bevel gear by hand, then pull off Armature from Gear housing. (Fig.4)Note:If it is difficult to pull off Armature by hand, do the following steps.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.Fig. 3Fig. 4Gear housingHex nut M7Wrench 111R039Small spiral bevel gear5) In order to remove Ball bearing 6000DDW from Gear housing,Fig. 5first remove Retaining ring R-30 using 1R005, then removeFlat washer 20 from Gear housing. (Fig.5)6) Reassemble Armature to Gear housing, then the spiral bevel gearto Armature shaft. Tighten Hex nut M7 provisionally by turningclockwise. (Refer toFigs. 4, 3)7) By tapping the end surface of Gear housing with plastic hammer,Ball bearing 6000DDW can be removed together with Armature.(Fig.6)8) Remove Ball bearing 608DDW from Armature using 1R269. (Fig.7)Fig. 6Small spiral bevel gearFig. 7Small spiral bevel gearFlat washer 22Retaining rig R-30Ball bearing 6000DDW1R269Ball bearing 600DDWHex nut M7Hex nut M7Ball bearing 6000DDW Ball bearing 608DDWASSEMBLING1) Mount Ball bearing 6000DDW on Armature by hand, then insertinto the bearing installation hole of Gear housing, (Fig.8)Then pull off Armature.2) Put Flat washer 22 on Ball bearing 6000DDW, and fasten themwith Retaining ring R-30 using 1R005.3) Then do the reverse of the disassembling steps.Fig. 8Ball bearing 6000DDWP 4/10Repair[3] -2. Large spiral bevel gear and Ball bearing 6002DDWNote:The gear and the ball bearing can be replaced without disassembling the Motor section.DISASSEMBLING1) Separate Bearing box from Gear housing first by unscrewing four M5x18 Pan head screws then by tapping the end ofGear housing with plastic hammer as illustrated inFig. 9.It is not necessary to remove Carbon brushes.2) Remove Ball bearing 6000ZZ using 1R269. (Fig.10)Fig. 9Fig. 101R269Bearing boxLarge spiral bevel gearBall bearing 696ZZGear housingBearing box3) Remove Ring spring 7 from Spindle by levering up with slotted screwdriver while expanding the ends of the springa little bit with 1R004 or 1R291. (Fig.11)Then remove Flat washer 8 and Lock washer.4) As illustrated inFig. 12,remove Large spiral bevel from Spindle together with Lock sleeve and Lock spring 16using 1R045 and 1R346.Fig. 11Slotted screwdriver1R004Fig. 12Bearing boxSpindleLarge spiral bevel gear1R0451R346Ring spring 7Spindle5) Hold Large spiral bevel gear securely by hand, and pull off Lock sleeve with adjustable wrench while turning itcounterclockwise. Then remove Lock spring 16 the same way as you removed Lock sleeve. (Fig.13)6) After removing Large spiral bevel gear, separate Bearing retainer 39 by removing three M3x6 Pan head screws. (Fig.14)Fig. 13Lock sleeveFig. 14Pan head screwM3x6 (3 pcs)Bearing retainer 39Lock spring 16Large spiral bevel gearP 5/10Repair[3] -2. Large spiral bevel gear and Ball bearing 6002DDW (cont.)DISASSEMBLING7) Remove Ball bearing in Bearing box by hitting Bearing box straight down against flat surface of work-bench. (Fig.15)If cannot be removed, use arbor press and a round bar for arbor of an appropriate size as illustrated inFig. 16.Fig. 15Fig. 16Round bar for arborBall bearingin Bearing boxASSEMBLINGDo the reverse of the disassembling steps.Note 1:Ring spring 7 inevitably loses its elasticity when removed from Spindle. This will also happen to new one whenit is assembled 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 inFig. 17when assembling Lock spring 16 and Lock sleeve to Large spiral bevel gear.Fig. 17Put Lock spring 16 on the hole of Large spiral bevel gear,then tap the top of the spring with plastic hammerwhile gradually moving the impact point counterclockwiseuntil the spring does not move any further.Put Lock sleeve over Lock spring 16, then tap the topof the sleeve with plastic hammer as illustrated belowwhile gradually moving the impact point clockwiseuntil the sleeve does not move any further.Lock spring 16Large spiral bevel gearLock sleeve
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