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Hitachi DH 40MC, Service Manual

The Hitachi DH 40MC is a top-of-the-line demolition hammer designed for heavy-duty applications. To ensure proper operation, it is essential to have a reliable Service Manual. Visit our website to download the user manual for this product, absolutely free. Access it now at 88.208.23.73:8080.

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PARTS

DH 40MC

   DESCRIPTION

    REMARKS

1

371151

FRONT CAP

1

2

331540

STOPPER RING

1

3

371138

RETAINER WASHER

1

4

371152

RETAINER DAMPER (A)

1

5

330209

SIDE HANDLE

1

6

337577

WING BOLT

1

7

949859

ROLL PIN D2 X 8 (10 PCS.)

1

8

371135

MOUNT

1

9

949556

NUT M6 (10 PCS.)

1

10

331247

HANDLE BOLT

1

11

371133

GRIP

1

12

371157

BIT LOCK HOLDER

1

13

371159

THRUST PLATE

1

14

371167

RETAINER SPRING

1

15

371145

SPRING HOLDER (A)

1

16

331246

BAND

1

17

371141

RETAINING RING D55

1

18

6907DD

BALL BEARING 6907DDU

1

19

371142

BEARING WASHER

1

20

371148

OIL SEAL

1

21

991712

HEX. SOCKET HD. BOLT (W/FLANGE) M6 X 25

4

22

371125

CYLINDER CASE

1

23

956996

O-RING (1AS-60)

1

24

371153

RETAINER DAMPER (B)

1

25

371144

DAMPER SLEEVE

1

26

371161

RETAINER DAMPER WASHER

1

27

370654

BIT LOCK

2

28

371155

RETAINER SLEEVE

1

29

313396

O-RING (C)

1

30

371160

SECOND HAMMER

1

31

371163

DAMPER WASHER

1

32

371316

DAMPER

1

33

371164

DAMPER HOLDER

1

34

371165

STRIKER

1

35

986104

O-RING

1

36

371156

CYLINDER

1

37

331533

SPRING HOLDER (B)

1

38

331534

LOCK SPRING

1

39

331535

LOCK SLEEVE

1

40

371166

CLUTCH SPRING

1

41

371137

CLUTCH

1

42

371147

SLIDER

1

43

371158

BEVEL GEAR

1

44

331234

THRUST WASHER

1

45

986104

O-RING

1

46

331221

PISTON PIN

1

47

326369

PISTON

1

48

371175

CONNECTING ROD

1

49

371172

FAN GUIDE

1

50

953174

HEX. HD. TAPPING SCREW D5 X 55

2

- 2 -

12 - 16

          *ALTERNATIVE PARTS

ITEM 

NO. 

NO. 

USED 

CODE NO. 

Summary of Contents for DH 40MC

Page 1: ...sembly 1 Reassembly 4 Lubrication points and types of lubricant 8 Tightening torque 9 Insulation test 9 No load current value 9 Connecting diagram 10 STANDARD REPAIR TIME UNIT SCHEDULES 11 CONTENTS Page PRODUCT NAME Hitachi Rotary Hammer Model DH 40MC CONFIDENTIAL LIST No DH 40MC F440 Dec 2016 ...

Page 2: ...tainer Washer 3 Retainer Damper A 4 Bit Lock Holder 12 two Bit Locks 27 Thrust Plate 13 Retainer Spring 14 and Spring Holder A 15 can be removed from the Retainer Sleeve 28 Fig 2 2 Disassembly of the hammering mechanism 1 Removing the second hammer and striker Remove the Hex Socket Hd Bolt M6 x 25 21 to remove the Cylinder Case 22 Spring Holder B 37 Retainer Sleeve 28 and other parts from the main...

Page 3: ...ket Hd Bolt M5 110 from the Crank Cover 111 Detach the Crank Cover 111 and the assembly of the Lever Shaft Holder 116 from the Crank Case Ass y 91 Remove the Change Plate 119 from the Crank Case Ass y 91 The piston ass y can be removed from the main body without removing the Bevel Gear 43 and Slip Clutch Ass y 93 Move the Connecting Rod 48 as shown below to remove the piston ass y from the Crank S...

Page 4: ...Gear 123 side of the Crank Case Ass y 91 Use a retaining ring puller to remove the Retaining Ring for D40 Hole 87 fixing the Ball Bearing 6203DD 88 NOTE At this time turn the Crank Shaft 85 to expose the hole of the Retaining Ring for D40 Hole 87 prior to removal Use a hand press to press the end face of the Crank Shaft 85 and then remove the First Gear 123 and Crank Shaft 85 from the Crank Case A...

Page 5: ... steel rod and use an adequate tool to press fit the First Gear 123 NOTE Prior to press fitting make sure the Feather Key 3 x 3 x 8 86 matches the key groove of the First Gear 123 2 Mounting the piston Insert the Connecting Rod 48 into the Piston 47 and then press fit the Piston Pin 46 from the D8 hole marked side of the Piston 47 NOTE Be careful not to let the Piston Pin 46 project from the outer...

Page 6: ...lip of the oil seal After inserting the Thrust Washer 44 and the Bevel Gear 43 into the Crank Case Ass y 91 insert the Slider 42 into the outer periphery of the Bevel Gear 43 along the Crank Case Ass y 91 groove NOTE The Bevel Gear 43 cannot be inserted if the Slip Clutch Ass y 93 is mounted to the Crank Case Ass y 91 on ahead Insert the Clutch 41 so that it engages with the internal claw of the B...

Page 7: ...itachi Motor Grease No 29 and then press fit the Spacer 105 and Ball Bearing 629VV 106 to the Bevel Pinion 94 in this order 5 Mounting the lever shaft holder Apply Hitachi Motor Grease No 29 to the O ring S 18 115 and then attach the O ring to the Change Lever 112 Insert the Lever Spring 113 into the change lever hole Apply Hitachi Motor Grease No 29 to the Steel Ball D4 76 114 and place it into t...

Page 8: ... on the bottom of the Lever Shaft Holder 116 Set the Change Lever 112 to Rotation Hammering mode position Put the assembly of the Lever Shaft Holder 116 and Crank Cover 111 on the Crank Case Ass y 91 and fix them with the Hex Socket Hd Bolts M5 110 NOTE After tightening the Hex Socket Hd Bolts M5 110 check the following The Change Lever 112 rotates smoothly The Retainer Sleeve 28 is kept from rota...

Page 9: ... specified grease to the Thrust Washer 44 Apply specified grease to the inner lip of the Oil Seal 20 Apply specified grease to the inside of the Clutch 41 Apply specified grease to the Damper 32 Apply specified grease to Retainer Damper B 24 Hitachi Motor Grease No 29 Fill a total of 20 g of Hitachi Motor Grease No 29 in the Crank Case Ass y 91 on the First Gear 123 side and the Gear Cover 108 sid...

Page 10: ...lt M6 x 45 4 10 to 12 7 4 to 8 9 109 Seal Lock Hex Socket Hd Bolt M6 x 20 2 10 to 12 7 4 to 8 9 110 Hex Socket Hd Bolt W Flange M5 x 18 4 8 to 10 5 9 to 7 4 121 Cap Screw 1 7 to 9 5 2 to 6 6 127 Hex Socket Hd Bolt W Flange M5 x 12 1 4 0 0 5 3 0 0 4 After completing disassembly and repair measure the insulation resistance and dielectric strength Insulation resistance 7 MΩ or higher as measured with...

Page 11: ...r Ass y 54 Stator Ass y 54 For the USA Canada Mexico and Panama 120 V For Taiwan Australia New Zealand Europe South Africa Turkey Vietnam Russia China and Korea For the other countries A Armature Ass y 74 Stator Ass y 54 Stator Ass y 54 Switch 78 Cord 70 Pillar Terminal 67 Connector 68 Noise Suppressor V 66 Choke coil Inside the Stator Ass y 54 Choke coil Inside the Stator Ass y 54 Connecting diag...

Page 12: ...ing Clutch Spring Slider Piston O ring Connecting Rod Gear Cover Armature Ball Bearing 6201DD Ball Bearing 629VV Crank Shaft Ball Bearing 6203DD First Gear Slip Clutch Ass y Bevel Gear Housing Ass y Stator Ass y Crank Case Work Flow Handle Cover Switch Cord Cord Armor Tail Cover Hood Crank Cover Change Lever Lever Shaft Holder Change Plate Front Cap Grip Retainer Washer Retainer Damper A Bit Lock ...

Page 13: ... 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 55 54 58 57 56 59 60 61 62 63 64 65 65 66 67 68 69 72 73 74 75 76 77 78 79 80 81 83 84 82 70 5 6 7 8 9 10 85 86 87 88 89 90 91 110 111 112 113 114 115 116 117 118 119 92 93 94 95 97 98 99 100 102 103 104 105 106 107 96 108 109 122 124 125 126 127 502 503 501 71 101 ...

Page 14: ...E M6 X 25 4 22 371125 CYLINDER CASE 1 23 956996 O RING 1AS 60 1 24 371153 RETAINER DAMPER B 1 25 371144 DAMPER SLEEVE 1 26 371161 RETAINER DAMPER WASHER 1 27 370654 BIT LOCK 2 28 371155 RETAINER SLEEVE 1 29 313396 O RING C 1 30 371160 SECOND HAMMER 1 31 371163 DAMPER WASHER 1 32 371316 DAMPER 1 33 371164 DAMPER HOLDER 1 34 371165 STRIKER 1 35 986104 O RING 1 36 371156 CYLINDER 1 37 331533 SPRING H...

Page 15: ...4 66 371177 NOISE SUPPRESSOR V 1 FOR EUROPE GBR AUS NZL SAF RUS TUR CHN 67 938307 PILLAR TERMINAL 1 EXCEPT FOR THA INA SIN MAL IND PAN 220V 68 959141 CONNECTOR 50092 10 PCS 1 68 959141 CONNECTOR 50092 10 PCS 2 FOR THA INA SIN MAL IND PAN 220V 69 NAME PLATE 1 70 500390Z CORD 1 CORD ARMOR D8 2 70 500434Z CORD 1 CORD ARMOR D8 2 FOR USA CAN MEX PAN 120V 70 500235Z CORD 1 CORD ARMOR D8 2 FOR INA IND PA...

Page 16: ...944109 FEATHER KEY 3 X 3 X 8 1 96 321279 COLLAR 1 97 313050 OIL SEAL A 1 98 6002DD BALL BEARING 6002DDCMPS2L 1 99 331213 WASHER 1 100 331214 WASHER A 1 101 331215 SECOND GEAR 1 102 321281 GEAR HOLDER 1 103 321282 SPRING C 10 104 331217 NEEDLE 10 105 331219 SPACER 1 106 629VVM BALL BEARING 629VV 1 107 331220 BEARING WASHER C 1 108 371124 GEAR COVER 1 109 992803 SEAL LOCK HEX SOCKET HD BOLT M6 X 20 ...

Page 17: ...HEX SOCKET HD BOLT W FLANGE M5 X 12 1 DESCRIPTION REMARKS 501 371122 CASE 1 502 981840 GREASE A FOR HAMMER HAMMER DRILL 30G 1 503 971786 STOPPER ROD 1 12 16 Printed in Japan 5 161207N ALTERNATIVE PARTS PARTS STANDARD ACCESSORIES NO USED CODE NO ITEM NO CODE NO NO USED CODE NO ITEM NO ...

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