GA7012C-TE, MAKITA Budowa, Instrukcje serwisowe
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//-->TECHNICAL INFORMATIONGA7012C,GA9012C180mm (7") Angle Grinder230mm (9") Angle GrinderHLPRODUCTP 1/6Models No.DescriptionCONCEPT AND MAIN APPLICATIONSModels GA7012C/ GA9012C are developed as sister toolsof GA7010C/ GA9010C.Additionally to the benefits of GA7010C/ GA9010C,Models GA7012C/ GA9012C feature:• Anti-restart function• Large trigger switch with a lock lever to comply withnew IEC RegulationsWheel size is:180mm (7'') for Model GA7012C230mm (9'') for Model GA9012CWDimensions: mm (")GA7012CGA9012C453 (17-7/8)200 (7-7/8)250 (9-7/8)137 (5-3/8)Model No.Length (L)Width (W)Height (H)SpecificationVoltage (V)110120220230240Model No.Current (A)16158.69.27.9Cycle (Hz)50 / 6050 / 6050 / 6050 / 6050 / 60GA7012C180 (7)Continuous Rating (W)InputOutput7001,650700---1,0001,8001,2002,0001,0001,800Max. Output(W)2,6002,6003,0003,0003,000GA9012C230 (9)DiameterWheel size: mm (") Hole diameter22.23 (7/8)Max. thickness6 (1/4)No load speed: min.ˉ¹ = rpm8,400Current limiterYesElectronic features Soft startYesConstant speedYesAnti-restart functionYesProtection against electric shockDouble insulation2.5 (8.2)Power supply cord: m (ft)Net weight*: kg (lbs)4.3 (9.5)* Weight according to EPTA-Procedure 01/2003, with Side grip and Wheel cover6,0004.5 (9.9)Lock nut wrench 35 ..................................... 1Side grip ....................................................... 1Note:The standard equipment for the tool shown above may vary by country.Standard equipmentOptional accessoriesVibration absorbing side grip, Toolless quick adjustable wheel cover, Toolless lock nut, Dust cover attachmentGA7012C:Accessories for 180mm angle grinderGA9012C:Accessories for 230mm angle grinderRepairCAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.P2/ 6[1] NECESSARY REPAIRING TOOLSCode No.1R0351R0451R2691R2911R340DescriptionBearing setting plate 15.2Gear extractor (large)Use forpress-fitting Ball bearingsremoving Gear housing cover and Bearing boxremoval/Installation of the Hex socket head bolts that fasten Bearing boxremoving Ball bearing 608DDW on the commutator end of Armature shaftBearing extractorRetaining ring S and R pliers removal/Installation of the Retaining ring that retains larger Spiral bevel gearremoval/Installation of Bearing retainerBearing retainer wrenchFig. 1Gear room[2] LubricationPut 40g of Makita grease SG. No.0 into the gear room of Gear housingfor a long gear life. (Fig.1)[3] DISASSEMBLY/ASSEMBLYNote:As listed to right, the grinders use differentModel No.spiral bevel gears, and they are notinterchangeable.GA7012CReferring to this list, therefore, be sure to useGA9012Ccorrect gears for replacement.Smaller spiral bevel gear(on armature shaft)11 teeth9 teethLarger spiral bevel gear(on spindle)37 teeth43 teeth[3]-1. Replacing Armature, Smaller spiral bevel gear and Ball bearing 6201LLBDISASSEMBLINGNote:Disassembling can be done without disassembling Gear housingFig. 2section.1) After removing Carbon brushes, separate Gear housing section fromMotor housing by removing four 5x30 Tapping screws.2) Slide Gear housing cover until you see the corners on the end ofMotor housing. And then, remove the assembly of Armature andGear housing cover from Motor housing by tapping two cornerson the end of Motor housing with plastic hammer. (Fig.2)3) Remove Hex nut M6 by turning it counterclockwise while holdingArmature firmly by hand. Now smaller Spiral bevel gear can beremoved from Armature shaft by hand.4) Remove Gear housing cover from Armature using 1R045. (Fig.3)Ball bearing 6201LLB is still on Gear housing cover at this step.Therefore, remove the bearing with a round bar. (Fig.4)5) Remove Ball bearing 608DDW on the commutator end of Armatureshaft with 1R269.Fig. 3Fig. 41R045Gear housing coverSlide Gearhousing cover.Tap two corners on the endof Motor housing.Round barBall bearing 6201LLBGear housing coverBall bearing 6201LLBRepair[3] DISASSEMBLY/ASSEMBLY[3]-1. Replacing Armature, Smaller Spiral bevel gear and Ball bearing 6201LLB (cont.)ASSEMBLINGP3/ 6Assemble by reversing the disassembly procedure as described below.1) Insert Ball bearing 6201LLB straight into Gear housing cover. After setting Gear housing cover on 1R035,press-fit Armature to Gear housing cover using arbor press. (Fig.5)2) Install smaller Spiral bevel gear on Armature shaft, and tighten Hex nut M6 securely with a spanner 10.And then, install the assembly of Armature and Gear housing cover on motor housing, and align the screw holeson Gear housing cover with those of Motor housing.3) While aligning the protrusion on Gear housing with that on Motor housing, fasten Gear housing to Gear housingcover and Motor housing with four 5x30 Tapping screws. (Fig.6)Fig. 5Fig. 6Gear housingArmatureGear housing coverGear housing coverMotor housing1R035Align the projection on Gear housingwith that on Motor housing.[3]- 2. Replacing Larger Spiral bevel gear and Ball bearing 6202DDWDISASSEMBLINGNote:Disassembling can be done without disassembling Gear housing section.1) Remove four M5x16 Hex socket head bolts that fasten Bearing box to Gear housing.2) Insert two slotted screwdrivers into two diagonal positions on the slit between Bearing box and Gear housing.And twist the two screwdrivers at the same time till Bearing box is lifted up approximately 3mm.And then, insert the screwdrivers further into the slit, and remove Gear housing from Gear housing coverby lifting it up with the screwdrivers. (Fig.7)Fig. 7Slotted screwdriversBearing boxGear hosingRepair[3] DISASSEMBLY/ASSEMBLY[3]-2. Replacing Larger Spiral bevel gear and Ball bearing 6202DDW (cont.)DISASSEMBLING3) Remove Ball bearing 608LLB from Spindle with 1R269 as drawn to right inFig. 84) Remove Retaining ring S-15 from Spindle with 1R291 as drawn to right inFig. 8.Now larger Spiral bevel gear and Woodruff key can be removed from Spindle by hand.5) Remove Spindle from Bearing box with 1R045. (Fig.9)Fig. 8Fig. 91R2691R2911R045P4/ 6Bearing boxRetainingring S-15SpindleBall bearing608LLB6) Hold Bearing box securely with vise, and removeBearing retainer from Bearing box with 1R340.(Fig.10)7) Remove Ball bearing 6202DDW from Bearing boxby hitting it straight against the surface of work bench.If it cannot be removed, use arbor press.Fig. 10Turn 1R340counterclockwise.1R340Bearing boxASSEMBLINGAssemble by reversing the disassembly procedure.Note:When installing the larger Spiral bevel gear onto Spindle,be careful not to allow Woodruff key 4 to be out of position.It is recommended to apply grease to the key slot on Spindlein order to hold the Woodruff key securely in place. (Fig.11)Fig. 11Larger spiral bevel gearWoodruff key 4[3]- 3. Replacing Shaft lock sectionDISASSEMBLING1) Remove Bearing box from Gear housing. (Fig.7)2) Pull off Shoulder pin 7 with pliers while pushing Pin cap witha finger. (Fig.12)Note:Do not pull off shoulder pin 7 without holding pin cap becauseCompression spring 7 would sling Pin cap.ASSEMBLINGAssemble by reversing the disassembly procedure.Note:Do not use removed Pin cap because removal of Shoulder pin 7damages the inside surface of Pin cap. Be sure to remove plasticdust of Pin cap from Shoulder pin 7 and to install it onto thenewPin cap.Fig. 12Shoulder pin 7Compressionspring 7Gear housingPin capCircuit diagramFig. D-1InsulatedterminalP5/ 6InsulatedterminalFieldInsulatedterminalTerminalblockSwitchControllerColor index of lead wires' sheathBlackWhiteBrownOrangeBluePowersupplycordNoisesuppressorPick up coil[1] Wiring on Motor Housing1) Draw the lead wires of (a), (b), (c), (d), (e) and (f) throughthe openings (areas colored gray), and hold them with leadwire holders. (Fig.D-2)2) And then route the lead wires as illustrated below inFig. D-2.Note:Illustrated in Fig. D-2 is Motor housing viewed fromthe side of A.Fig. D-2(a) Field lead wire (orange)(c) Field lead wire (black)(b) Field lead wire (black)Wiring diagramMotor housing[A]Put (a) Field lead wire (orange)under (b) Field lead wire (black)when holding them with leadwire holders.(d) Connecting lead wire (black)of brush holder(e) Connecting lead wire (black)of brush holderPut Insulated terminalin this compartmenton Motor housing.Put Insulated terminalin this compartmenton Motor housing.Lead wireholders(f) Field lead wire (black)Pickup coil
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