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Makita HM0871C manual

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Table of contents for the manual

  • Page 1

    Models HM0871C and HM0870C are 5kg-class demolition hammers adapted for SDS-MAX bits, and dev eloped from HM0860C, featuring: Same high work ef ficienc y as HM0860C Higher durability achie ved by using ball bearing for crank section A VT * for reduced vibration during chipping (HM0871C only) Suppression of motor speed during no-load for reduced vib[...]

  • Page 2

    P 2 / 1 7 R epair [1] NECESSAR Y REP AIRING TOOLS [2] LUBRICA TIONS Fig. 1 Code No. 1R003 Retaining ring S pliers ST -2N 1R212 T ip for Retaining ring pliers 1R005 Retaining ring R pliers R T -2N 1R089 Bearing extractor 1R023 When it is diff icult to remov e Armature from Crank housing complete. When it is diff icult to remov e Ball bearing 6203LLU[...]

  • Page 3

    DISASSEMBLING (1) Remov e T ool holder cap as illustrated in Fig. 2 . Remov e Handle section by loosening four 5x25 T apping screws, and then disconnect Lead unit from Controller . Stand the machine upright. While pressing down Chuck co ver , remov e T ool holder cap. And then, remov e Chuck cover . Fig. 2 Handle section Lead unit Controller Note :[...]

  • Page 4

    P 4 / 1 7 R epair DISASSEMBLING (1) Disassemble Chuck section. ( Figs. 2 , 3 and 4 ) (2) Removing Retaining ring R-42, disassemble T ool holder section and take out Impact bolt. ( Fig . 5 ) (3) Remove Fluoride ring 28 and O ring 23 from Impact bolt when Fluoride ring 28 is worn out as illustrated in Fig. 6 . 2. Remov e Flat washer 29 and Rubber rin[...]

  • Page 5

    (1) First, disassemble Chuck section as illustrated in Fig. 2 , 3 and 4 . (2) Remov e Housing cover as illustrated in Fig . 9 . Fig. 9 Fig. 10 [3] DISASSEMBL Y/ASSEMBL Y [3]-2 T ool holder section (cont.) Housing cov er Remov e Housing cover by unscre wing M5x25 Hex sock et Head bolt. Acti ve dynamic vibration absorber comes into sight. Insert Scre[...]

  • Page 6

    P 6 / 1 7 R epair Fig. 11 Fig. 12 Fig. 13 Fig. 14 DISASSEMBLING ASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-3 Active dynamic vibration absorber (exclusi vely f or HM0871C) (cont.) (4) The remo ved Activ e dynamic vibration absorber can be disassembled as illustrated in Fig. 11 . (1) Assemble a pair of Acti ve dynamic vibration absorber . ( Fig. 11 ) [...]

  • Page 7

    P 7 / 1 7 R epair Fig. 15 Fig. 16 DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-4 Piston, Striker , Cylinder Remov e Barrel from Crank housing M6x25 Hex sock et head bolt (4pcs.) (1) Disassemble Chuck section as illustrated in Figs 2 , 3 and 4 . (2) Remov e Housing cover as illustrated in Fig . 9 . In case of HM0871C, disassemble Active dynamic vibr[...]

  • Page 8

    P 8 / 1 7 Fig. 17 Fig. 18 DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-4 Piston, Striker , Cylinder (cont.) Remov e Cylinder section by tapping Barrel using plastic hammer . Pay attention to the tapped position. Ring 20, Rubber ring 20, Flat washer 23, Guide ring, Slide sleev e are remov ed from Cylinder section. (4) Separate Cylinder section from [...]

  • Page 9

    1. Keeping Crank shaft in the condition Crank pin is at the closest position to Barrel side, hold Armature by inserting a bar into Armature fan. P 9 / 1 7 Fig. 19 Fig. 20 DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-5 Crank shaft 4. T ighten the M8x40 Hex socket head bolt using Hex wrench until Crank shaft is pulled of f from Ball bearing 6203LLU i[...]

  • Page 10

    Crank shaft can be remov ed as illustrated below . Remov e Retaining ring R-40 with 1R005. Loosening M8x40 Hex socket head bolt halfway , insert Crank shaft into the remaining Ball bearing 6203LLU by tapping the M8x40 Hex socket head bolt. P 1 0 / 1 7 Fig. 21 Fig. 22 Fig. 22A DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-5 Crank shaft Setting 1R132 [...]

  • Page 11

    P 1 1 / 1 7 Assemble Cylinder guide to Cylinder 32 so that O ring 46 side of Cylinder guide faces Crank housing side. (1) Cylinder section can be assembled as illustrated in Fig. 25. Cylinder guide Cylinder 32 O ring 46 Crank housing Side Crank housing side Align the six protrusions of Guide ring to Slide sleev e and assemble Guide ring to Slide sl[...]

  • Page 12

    P 1 2 / 1 7 DISASSEMBLING DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-7 Controller Controller can be remov ed as illustrated in Fig. 29 . Fig. 29 Fig. 30 Disconnect Connector From Controller . Disassemble Handle section by unscrewing four 5x25 T apping screws. Unscrewing 4x12 T apping screws, remov e Controller by lev ering up with two Slotted scr[...]

  • Page 13

    P 1 3 / 1 7 R epair DISASSEMBLING [3] DISASSEMBL Y/ASSEMBL Y [3]-8 Armature (cont.) Fig. 32 Fig. 33 Fig. 32A (6) Disassemble Armature from Crank housing as illustrated in Fig. 32 . If it is dif ficult to remov e as illustrated in Fig. 32 , Crank shaft has to be remo ved in the follo wing process. 1. Disassemble Barrel, Cylinder section as illustrat[...]

  • Page 14

    P 1 4 / 1 7 Fig. 34 [3]-9 Handle section (1) Disassemble Handle section as per the left illustration in Fig. 29 . (2) Remov e Handle cover by unscre wing 4x18 T apping scre w to replace the electrical parts in Handle. See Fig. 34 . Power supply cord Remov e 4x18 T apping screw and Handle co ver . Switch and Power supply cord can be replaced. Rubber[...]

  • Page 15

    P 1 5 / 1 7 R epair [3] DISASSEMBL Y/ASSEMBL Y [3]-10. F astening torque [4] MAINTENANCE PR OGRAM Replacing the following parts is recommended when Carbon brush is replaced. Wipe off the old grease in the machine, and then apply the fresh grease in accordance with [2] LUBRICATIONS . Fig. B Fig. A Item No. 1 3 Barrel Description Fasten the following[...]

  • Page 16

    C ircuit diagram W iring diagram P 1 6/ 1 7 Blue Lead wire is used for some countries. Brown Lead wire is used for some countries. T erminal block Power supply cord Polyethylene tube White Color index of lead wires' sheath Black Fig. D-2 Fig. D-1 HM0870C without No Load Speed Suppression Note in wiring 6 3 1 9 2 9 - 5 LO T No. LO W 6 3 1 9 3 0[...]

  • Page 17

    W iring diagram P 1 7 / 1 7 Fig. D-3 Handle Lead Unit Fig. D-4 Polyethylene T ube Ø8-30 Connector for connecting to Switch for connecting to T erminal block Pass the Lead wires of Lead unit through Polyethylene tube illustrated belo w . Lead unit’ s Lead wires Lead unit’ s Lead wires have to be put on both side of Boss, And connect them to Swi[...]