Hitachi H 70SD, Technical Data And Service Manual

Page 1: ...POWER TOOLS TECHNICAL DATA AND SERVICE MANUAL HAMMER H 70SD SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No E461 Dec 2001 H MODEL H 70SD ...

Page 2: ...parisons 8 7 PRECAUTIONS IN SALES PROMOTION 8 7 1 Handling Instructions 8 7 2 Caution Plate 8 7 3 Grease Replacement 9 7 4 O Ring Replacement 9 8 REFERENCE INFORMATION 10 8 1 Sealed and Dustproof Construction 10 8 2 Vibration Absorbing Construction 10 8 3 Tool Retainer 13 9 REPAIR GUIDE 14 9 1 Precautions and Suggestions for Disassembly and Reassembly of the Main Body 14 10 STANDARD REPAIR TIME UN...

Page 3: ...shing of concrete and similar materials Groove and channel digging in concrete Groove and channel digging in asphalt and gravel roads Tamping compacting of asphalt and graveled roads Cuting of asphalt Typical applications Construction work piping wiring work water supply drain work etc 4 SELLING POINTS Internal double insulation construction with sturdy aluminum frame Dustproof double air vent con...

Page 4: ...minimized by compressing and shearing the two blocks of rubber mounted between the housing and handle B and between the housing and the side handle The T shaped handle improves downward chipping and demolishing performance and reduces operator s fatigue for a long time operation 4 1 3 Dustproof double air vent construction protects against concrete chips A fine mesh is mounted between the tail cov...

Page 5: ...f shank tools Fig 2 can be used in the Model H 70SD by turning the tool retainer in the following two methods Fig 2 Air tool shank tool Retaining groove tool without collar Stanard hex shank tool combo type Fig 3 1 Mounting air tool shank tools and standard hex shank tools combo type 2 Mounting standard hex shank tools combo type and retaining groove tools without collars Fig 4 Maker Model HITACHI...

Page 6: ...z 110 230 240 AC single phase series commutator motor Double insulation Aluminum alloy die casting cast aluminum alloy glass fiber reinforced plastic resin Hammer net silver green and black Trigger switch T shaped handle 11 8 A 110 V 5 7 A 230 V 5 4 A 240 V 1 240 W for Australia only 1 400 W 1 850 min 1 400 min 20 0 kg 44 1 lbs excluding cord 22 0 kg 48 5 lbs Corrugated cardboard box Hex bar wrenc...

Page 7: ...o 996372 3 Cutting and stripping work asphalt cutting etc 1 Cutter 4 Digging substitute pick ax Code No 985233 Overall length 546 mm 21 1 2 1 Scoop Code No 996373 985231 Overall length 410 mm 16 9 64 520 mm 20 15 32 Overall length 410 mm 16 9 64 520 mm 20 15 32 Width 75 mm 3 75 mm 3 Code No 996374 985232 1 Demolition work ...

Page 8: ... numbers listed above are subject to change Please refer to periodic Technical News Bulletins 5 Grease for impact drill 500 g 1 1 lbs Can 30 g 1 oz Tube 70 g 2 5 oz Tube Code No 981840 Code No 308471 Code No 980927 ...

Page 9: ...ACHI H 70SD 1 240 1 400 722 28 7 16 554 21 13 16 237 9 5 16 42 0 H 70SA 1 240 1 400 625 24 5 8 554 21 13 16 237 9 5 16 42 0 Lubricating method No load noise level Vibration absorbing handle Full load noise level Vibration level Weight without cord Grease Grease Provided Provided illustration below A A B H 65SD Double insulation 102 2 18 0 39 7 Ibs 823 32 13 32 1 240 1 400 42 0 120 4 23 32 87 0 19 ...

Page 10: ...n to provide protection against safety hazards the dangers inherent in the use of any electric tool cannot be completely eliminated Accordingly general precautions and suggestions for the use of electric power tools and specific precautions and suggestions for the use of the Electric Hammer are listed in the Handling Instructions to enhance the safe efficient use of the tool by the customer Salesp...

Page 11: ... housing crank shaft side Do not exceed the designated amounts of grease If there is excessive grease it may flow between the striker and piston and cause reduced hammering efficiency and or increased recoil force N P C SEP 3A Part No 930035 is used in the speed change gear section inside the gear cover The proper supply amount is 80 g 2 8 oz Never use the hammering section special grease in the s...

Page 12: ...ted through holes at both sides of the housing The handle pins are supported by dampers B fitted into the slotted through holes so that they can be moved in the axial direction of the tool Two blocks of rubber handle dampers B are inserted between the housing and the handle holder By pressing the handle portion the handle holder turns and handle damper B is compressed and sheared according to the ...

Page 13: ... 11 Side handle Handle holder Switch lever Housing Fig 7 Handle holder Handle damper B Damper B Handle damper Handle holder Handle A B Handle pin Slotted through hole Damper B Housing ...

Page 14: ... vibration absorbing effect is maximum is set for between 5 kg 11 0 lbs and 10 kg 22 0 lbs The customer should be cautioned to avoid pressing fully down on the handles during operation Pressing force load N Z HITACHI H70SD 2 Level of handle vibration in Z direction The graph below illustrates the relationship between handle pressing force and handle vibration level in the Z direction Z 126 0 125 0...

Page 15: ...ol shank into the hexagonal hole of the front cover as far as it will go Fig 8 Put the retainer back in position to fix the tool shank Fig 9 2 Mounting standard hex shank tool and retaining groove tool without collar Lower the retainer in B direction and insert the tool shank into the hexagonal hole of the front cover as far as it will go facing the recessed portion of the tool shank to the retain...

Page 16: ...lts M6 x 45 61 and disassemble the Gear Cover 32 and Counter Gear 63 Then by inserting a flat blade screwdriver or similar tool into one of the air vents of the Inner Cover 36 and lifting it upwards the Inner Cover 36 Armature Ass y 88 Crank Shaft 41 and related parts can be removed in a single body 4 As illustrated in Fig 12 support the Inner Cover 36 with an appropriate tubular jig and push down...

Page 17: ...M8 x 35 21 and separate the Cylinder Case 18 from the Housing Ass y 103 From the Cylinder Case 18 take out the Striker 20 Piston 25 and Connecting Rod Ass y 27 in a single body Holding the Striker 20 firmly in one hand grasp the Connecting Rod Ass y 27 in the other hand and pull it forcefully to separate it from the striker Finally extract the Piston Pin 26 from the Piston 25 and separate the Pist...

Page 18: ... the Retainer 1 and remove the Lever Pin 3 The Retainer 1 and two Retainer Dampers 5 can then be removed from the Front Cover 6 Fig 15 Fig 15 Front Cover 6 Retainer Dampers 5 2 pcs Retainer 1 Lever Pin 3 Roll Pins D6 x 55 2 2 pcs Disassembly of the Retainer 1 section ...

Page 19: ...l Bearing 6203DDCMPS2L 66 into the Inner Cover 36 and fasten Bearing Cover A 65 onto the Inner Cover with the three Seal Lock Hex Socket Hd Bolts M5 x 16 40 Reassembly of the Striker 20 Two possible methods 1 After the Connecting Rod Ass y 27 has been assembled into the Housing Ass y 103 mount the Piston 25 and press it into the Striker 20 2 Mount the Piston 25 onto the Connecting Rod Ass y 27 and...

Page 20: ...ndle Pins 92 into two 17 5 mm dia holes of the Handle Holders 47 Finally tighten two Seal Lock Hex Socket Hd Bolts M8 x 16 30 with two Washers 100 At this time align the notch of the flange portion of the handle pin with the notch of the Handle Holder 47 and then hold the flange portion of the Handle Pin 92 Fig 17 Handle Damper B 2 pcs 48 Handle Holder 2 pcs 47 Damper B 4 pcs 43 Handle Pin 2 pcs 9...

Page 21: ...t out of the groove Reassembly of the Retainer 1 section Before reassembly apply grease Doubrex 251 Part No 980757 to the sliding portion between the Retainer 1 and the Retainer Damper 5 of the Front Cover 6 and Lever Pin 3 Mount the two Retainer Dampers 5 to the Front Cover 6 and then mount the Retainer 1 Insert the Lever Pin 3 into the 17 5 mm dia hole of the Retainer 1 facing the recessed porti...

Page 22: ... carefully clean any grease or other foreign matter from the male and female threads with gasoline thinner or similar cleaning solvents 9 1 4 Tightening torque 1 M4 hexagon socket hd bolts 4 41 N m 45 kgf cm 39 1 in Ibs 2 M5 hexagon socket hd bolts 7 84 N m 80 kgf cm 69 5 in Ibs 3 M6 hexagon socket hd bolts 9 80 N m 100 kgf cm 86 9 in Ibs 4 M8 hexagon socket hd bolts 29 4 N m 300 kgf cm 260 in Ibs...

Page 23: ...Cord 68 Vinyl Tube A I D 7xT0 5x50 80 Switch A 1P Screw Type W O Lock 98 Handle A 72 Support E 97 Cord Armor 73 Vinyl Tube 91 Handle Holder 47 Noise Suppressor 95 Schematic diagram of products with noise suppressor Fig 21 ...

Page 24: ...rounding leadwire are properly supported by Vinyl Tube 91 9 1 6 Insulation tests On completion of disassembly and repair measure the insulation resistance and dielectric strength Insulation resistance 7 MΩ or more with DC 500 V Megohm Tester Dielectric strength AC 4000 V 1 minute with no abnormalities 220 V 240 V and 110 V for U K products AC 2500 V 1 minute with no abnormalities 110 V 127 V excep...

Page 25: ... B Handle Pin Handle Holder General Assembly Front Cover Retainer Second Hammer Damper B O ring C Housing Ass y Stator Ass y Cylinder Case Crank Shaft Ball Bearing 6302VV Ball Bearing 6205DD Inner Cover Final Gear Armature Ass y Striker Piston Connecting Rod Ass y Oil Seal A O ring A O ring 1AS 60 Switch A Cord Ball Bearing 6203DD Ball Bearing 6201DD Counter Gear Ball Bearing 6001VV Ball Bearing 6...

Page 26: ... 16 17 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 18 42 43 44 45 46 47 48 49 43 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 44 40 65 66 67 68 69 70 71 45 72 73 74 75 76 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 45 30 47 54 100 101 102 103 104 105 106 501 502 ...

Page 27: ...S 4 23 998 414 O RING A 1 24 998 415 OIL SEAL A 1 25 998 413 PISTON 1 26 944 928 PISTON PIN 1 27 998 434 CONNECTING ROD ASS Y 1 INCLUD 28 28 944 921 NEEDLE BEARING NTN 8E NK 18 20 RDO 1 29 956 955 CRANK WASHER 1 30 996 364 SEAL LOCK HEX SOCKET HD BOLT M8X16 3 31 NAME PLATE 1 32 319 360 GEAR COVER 1 33 630 2VV BALL BEARING 6302VVCMPS2L 1 34 944 916 FINAL GEAR 1 35 944 915 DISTANCE RING B 1 36 998 4...

Page 28: ... 500 408Z CORD 1 CORD ARMOR D8 2 FOR AUS 69 992 870 PIN 1 70 992 869 SWITCH LEVER 1 71 968 643 RETAINING RING E TYPE FOR D4 SHAFT 1 72 305 636 HANDLE A 1 73 958 049 CORD ARMOR D8 2 1 73 940 778 CORD ARMOR D10 7 1 74 960 266 CORD CLIP 1 75 982 095 TAPPING SCREW W WASHER D4X20 2 76 980 063 TERMINAL 1 76 930 804 TERMINAL M4 0 10 PCS 1 FOR GBR 110V 78 959 141 CONNECTOR 50092 10 PCS 2 79 959 140 CONNEC...

Page 29: ...USING ASS Y 1 INCLUD 60 104 104 938 477 HEX SOCKET SET SCREW M5X8 2 105 319 362 MESH 1 106 306 099 TAIL COVER 1 501 943 277 HEX BAR WRENCH 3MM 1 502 872 422 HEX BAR WRENCH 6MM 1 601 996 373 COLD CHISEL 410MM HEX SHANK TYPE 1 602 985 231 COLD CHISEL 520MM HEX SHANK TYPE 1 603 996 374 CUTTER W75X410MM HEX SHANK TYPE 1 604 985 232 CUTTER W75X520MM HEX SHANK TYPE 1 605 985 233 SCOOP 546L HEX SHANK TYP...

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