GA9020R-TE, MAKITA Budowa, Instrukcje serwisowe
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//-->TECHNICAL INFORMATIONGA7020R/ GA9020RModel No.DescriptionPRODUCTP 1/9LAngle Grinders 180mm (7'')/ 230mm (9'')CONCEPT AND MAIN APPLICATIONSModels GA7020R/ GA9020R are developed as sister tools ofGA7020S/ GA9020S.Additionally to the benefits of models GA7020S/ GA9020S,GA7020R/ GA9020R feature:- Anti-restart function- Large trigger switch with a lock lever having two differentactions for releasing the switch from Lock-off position andlocking the switch on in order to comply with the requirementof the new IEC RegulationsWheel size is:180mm (7'') for Model GA7020R230mm (9'') for Model GA9020RHWDimensions: mm (")Model No.Length (L)Width (W)Height (H)GA7020RGA9020R473 (18-5/8)200 (7-7/8) 250 (9-7/8)140 (5-1/2)SpecificationVoltage (V)110120220230240SpecificationWheel size: mm (")Current (A)151510.5109.6Model No.Cycle (Hz)50/ 6050/ 6050/ 6050/ 6050/ 60GA7020R180 (7)22.23 (7/8)8,500YesYesYes2.0 (6.6)*1/ 2.5 (8.2)*25.6 (12.4)5.8 (12.8)6,600Continuous Rating (W)InputOutput1,6501,100---1,1002,2001,4002,2001,4002,2001,400Max. Output (W)2,7502,7503,3003,3003,300GA9020R230 (9)DiameterHole diameterNo load speed: min-1= rpm.Soft start featureAnti-restart functionDouble insulationPower supply cord: m (ft)Net weight*3: kg (lbs)*1for*2forBrazil, Australiaall countries except the two listed above*3Weight according to EPTA-Procedure 01/2003, with Side grip, Wheel cover, Inner flange, Lock nutStandard equipmentLock nut wrench 35 ......... 1 pcSide grip 36 ...................... 1 pcNote:The standard equipment for the tool shown above may vary by country.OptionalaccessoriesVibration absorbing side gripToolless quick adjustable wheel coverToolless lock nutDust cover attachmentPlastic carrying caseGA7020R:Accessories for 180mm angle grinderGA9020R:Accessories for 230mm angle grinderP2/ 9RepairCAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.[1] NECESSARY REPAIRING TOOLSCode No.Description1R004 Retaining ring pliers ST-21R0051R1651R2521R269Retaining ring pliers RT-2NRing spring setting tool BRound bar for arbor 30-100Bearing extractorUse forRemoving Retaining ring 15 from Spindle ass’yRemoving Retaining ring R-42 from Gear housing completeAssembling large Spiral bevel gear to Spindle ass’yAssembling Felt ring 18 to Gear housing completeAssembling / disassembling Ball bearings[2] LUBRICATIONSApply the following lubricant to protect parts and product from unusual abrasion.Fig. 15Item No.5DescriptionPortion to lubricateLubricantAmountGear housing complete Gear roomMakita grease SG No.0 60g[3] DIFFERENCE BETWEEN GA7020R AND GA9020RIn addition to Wheel cover and available Wheels, the following parts are different.Item No.738Parts of GA7020RSpiral bevel gear 16Spiral bevel gear 53BgroovedParts of GA9020RSpiral bevel gear 12Spiral bevel gear 53Anot groovedDescription in Technical informationSmall spiral bevel gearLarge spiral bevel gearRepairP 3/ 9[4] DISASSEMBLY/ASSEMBLY[4]-1. Armature, Small spiral bevel gear, Ball bearing 6301DDWDISASSEMBLING(1) Disassemble Armature and Small spiral bevel gear as illustrated inFigs. 2and3.Fig. 2Remove Carbon brushes. And thenremove 5x35 Tapping screws.5x35 Tapping screw (4pcs.)Brush holder capRemove Gear housing completetogether with Armature.Gear housing completeArmatureRemove Bearing box and M6x22Hex socket head bolts.Carbon brushFig. 3Turn Armature counterclockwise whileholding M8 Hex nut with Wrench 13.M8 Hex nut can be removed.M8 Hex nutPull off Armature whileholding Small spiral bevel gear.M6x22 Hex socket head bolt(4pcs.)Note:If the above work is very difficultdue to the seizing of Small spiralbevel gear, spray a lubricantbetween Armature shaft and SmallSmall spiralspiral bevel gear. And then turnbevel gearand pull Armature while holdingSmall spiral bevel gear with pliersand a cloth.ArmatureWrench 13 for locking M8 Hex nut(2) Disassemble Ball bearing 6301DDW as illustrated inFigs. 4 and 5.Fig. 4Remove Retaining ring R-42 with 1R005,then remove Flat washer 20.Gear housing completeFlat washer 20Retaining ringR-42Fig. 5Set Armature and Small spiral bevel gear to Gear housing complete.And set M8 hex nut in place temporarily by reversing the step ofFig. 3.Tap the end of Gear housing complete with a plastic hammer.Ball bearing 6301DDW can be removed from Rubber ring 38 inGear housing complete. Felt ring 18 falls off at that time.Rubber ring 38M8 Hex nutSmall spiral bevel gearBall bearing 6301DDWBall bearing 6301DDWFelt ring 18 (a component of Gear housing complete)P4/ 9Repair[4] DISASSEMBLY/ASSEMBLY[4]-1. Armature, Small spiral bevel gear, Ball bearing 6301DDW (cont.)DISASSEMBLING(3) Disassemble Armature as illustrated inFig. 6.Fig. 6Remove M8 Hex nut and small Spiral bevel gear again.Ball bearing 6301DDW can be removed by hand.Small spiral bevel gearM8 Hex nutBall bearing 6301DDWRemove Ball bearing 6200DDW with 1R269.Ball bearing 6200DDW1R269ASSEMBLINGAssemble Gear housing section by setting Felt ring 18, Ball bearing 6301DDW, Flat washer 20 and Retaining ring R-42in place of Gear housing complete.(1) Set Felt ring 18 in place as illustrated inFig. 7when disassembling Ball bearing 6301DDW.Fig. 7Flat washer as a jig28mm in outerdiameter0.5mm inthicknessCross-section of the bottomof the bearing roomFlat washer1R252 Rubber ring 381R252Felt ring 18Felt top portionSteel cup portion0.5mmV-blockHold Gear housing complete with twoV-blocks, and pressfit Felt ring 18 intothe hole of Gear housing complete so thatthe felt top portion and the bottom step ofGear housing complete is in line.Bottom step in Gear housing completeFelt ring 18Put a Flat washer (illustrated above) temporarily on Felt ring 18.Then press down the Flat washer with arbor press and 1R252carefully to move the Flat washer to only 0.5mm downwards.Remove the Flat washer after setting Felt ring 18 in place.P5/ 9Repair[3] DISASSEMBLY/ASSEMBLY[3]-1. Armature, Small spiral bevel gear, Ball bearing 6301DDW (cont.)ASSEMBLING(2)Assemble Ball bearing 6301DDW to Gear housing complete as illustrated in Fig. 8.Fig. 8Armature with Ballbearing 6301DDWRubber ring 38Armature1R005Retainingring (INT) R-42Ball bearing6301DDWFlat washer 20Make sure that Rubberring 38 is set in place.(Refer toFig. 7)Assemble Ball bearing 6301DDW toArmature temporarily.After setting Ball bearing 6301DDW inplace of Gear housing complete, pull offArmature.Putting Flat washer 20 on Ballbearing 6301DDW, secure themwith Retaining ring (INT) R-42.(3) Assemble Armature and small Spiral bevel gear to Gear housing complete as illustrated inFig. 9.Fig. 9Insert Armature shaft through Small spiral bevel gearand Ball bearing 6301DDW in Gear housing.Ball bearing6301DDWSmall spiralbevel gearSet M8 Hex nut toArmature shaft.Holding M8 Hex nut with Wrench 13,turn Armature clockwise by hand firmly.M8Hex nutArmature(4) Assemble Gear housing complete to Motor housing, And assemble Bearing box section to Gear housing complete.Reverse the disassembling step inFig. 2.
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