Hitachi DH 24PD3, Technical Data And Service Manual

Page 1: ...TECHNICAL DATA AND SERVICE MANUAL ROTARY HAMMER DH 24PD3 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No E492 Sept 2005 D MODEL DH 24PD3 Hitachi Power Tools ...

Page 2: ...D SERVICE MANUAL symbols are used in the place of company names and model names of our competitors The symbols utilized here are as follows Symbols Utilized Competitors Company Name Model Name MAKITA HR2430 C BOSCH GAH500DSR B MAKITA HR2432 D ...

Page 3: ...tion Plate 12 7 3 Dust Collecting Equipment 12 8 REFERENCE MATERIAL 13 8 1 Lubrication 13 8 2 Dust Collection Mechanism 13 8 3 Tool Structure 15 8 4 Rotation Only and Rotation Hammering Changeover Mechanism 18 8 5 Rotation Only no hammering 18 8 6 Drill Bits 19 8 7 Chuck Section 20 8 8 Dust Collector B 20 9 PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY 22 9 1 Disassembly 22 9 2 Reassembly 26 9 3 Tight...

Page 4: ...ciency 5 Non slip double layer molded handle and gear cover 6 New and powerful design aiming at iF design award 3 APPLICATIONS 1 Rotation and hammering function Drilling anchor holes Drilling holes in concrete tile brick and similar materials 2 Rotation only function Drilling holes in steel and wood with chuck adapter Tightening and loosening machine screws wood screws with chuck adapter Typical a...

Page 5: ... C 4 1 3 Internal pressure adjustment mechanism By minimizing variations in the internal pressure during operation hammering operation is stabilized In addition idling and grease leakage can be prevented 4 1 4 Class top dust collection efficiency The dust collection efficiency of the Model DH 24PD3 is equivalent to that of the Model DH 24PD2 and 6 higher than B thanks to the efficient transmission...

Page 6: ...C single phase commutator motor Type of motor Model DH 24PD3 13 mm 1 2 32 mm 1 1 4 Voltage V Current A Input W 120 7 0 230 3 6 800 Rotation speed Forward 0 to 1 050 min 1 Reverse 0 to 550 min 1 Type of switch Variable speed control switch and reversing switch Gun type handle of main body and side handle Type of handle Glassfiber reinforced polyamide resin green and black Glassfiber reinforced poly...

Page 7: ... Code No 306369 306368 306370 Code No Adapter for slender shaft Drill bit slender shaft 1 Drill bit taper shank 2 Taper shank adapter SDS plus shank Drill bit taper shank 21 5 27 32 944464 Morse taper No 2 303618 3 Cotter Straight shank bit for impact drills 13 mm 1 2 hammer drill chuck SDS plus shank 13 mm hammer drill chuck For drilling operations when using a straight shank bit for impact drill...

Page 8: ...ame W 1 4 Anchor setting adapter A W 5 16 Anchor setting adapter A W 3 8 Anchor setting adapter A W 1 2 Anchor setting adapter A W 5 8 Anchor setting adapter A Code No 971794 971795 971796 971797 971798 Part name W 1 4 Anchor setting adapter B W 5 16 Anchor setting adapter B W 3 8 Anchor setting adapter B W 1 2 Anchor setting adapter B W 5 8 Anchor setting adapter B Internal cone type External con...

Page 9: ...k SDS plus shank Core bit shank A Core bit outer diameter 25 38 mm 31 32 1 1 2 Overall length 105 mm 4 1 8 Code No 303625 Overall length 300 mm 11 52 64 Code No 303626 Core bit shank B Core bit outer diameter 45 50 mm 1 25 32 2 Overall length 300 mm 11 52 64 Code No 303627 D Crushing operation rotation hammering Bull point round type only SDS plus shank Code No 303046 E Bolt placing operation with...

Page 10: ...nd securely fix the drill chuck to chuck adapter G with the special screw a left hand threaded M6 screw when mounting the drill chuck onto chuck adapter G Chuck wrench Part name Chuck adapter G for SDS plus shank system 13 mm 1 2 Drill chuck 13VLR with chuck wrench Special screw M6 left hand threaded Code No 303623 321814 981122 a b c 2 Slotted head minus bit Overall length 50 mm For use with slot...

Page 11: ...taion If reverse rotation is to be used for loosening screws use the plus bit Bit No 2 described below by attaching it directly to chuck adapter D Screw size Chuck adapter D SDS plus shank Chuck wrench Bit No Chuck adapter D SDS plus shank Code No 971787 Code No 306885 I Grease for electric impact drill Containing 500 g 1 1 lbs Code No 980927 Containing 30 g 0 07 lbs Code No 981840 70 g 0 15 lbs C...

Page 12: ... 24 15 16 750 0 980 0 4 550 3 3 7 3 lbs 13 1 2 415 16 1 2 225 8 7 8 32 1 1 4 131 5 11 16 One push type 2 modes HITACHI DH 24PD2 24 15 16 720 0 1 050 0 4 600 2 8 6 2 lbs 13 1 2 408 16 1 16 198 7 13 16 32 1 1 4 88 3 15 32 Pushbutton type One push type C 24 15 16 710 0 1 050 0 4 900 2 6 5 7 lbs 13 1 2 416 16 3 8 197 7 49 64 32 1 1 4 84 3 5 16 One push type Lever type L mm Application Dust bag capacit...

Page 13: ...ly depending on the work conditions Use the factory test results shown in Fig 1 for comparison purpose only Fig 1 Test conditions Direction Downward drilling Pushing force 98 N 10 kgf Test material Concrete panel with a compression strength of 2 352 N cm2 240 kgf cm2 ...

Page 14: ...s shown in Fig 2 for comparison purpose only Figure 2 shows a comparison of dust collection efficiency based on the drilling of 50 mm 2 holes into wall material with a dia 14 5 mm 9 16 drill bit Fig 2 Test conditions Direction Drilling into wall Pushing force 98 N 10 kgf Test material Concrete panel with a compression strength of 2 352 N cm2 240 kgf cm2 ...

Page 15: ...otion 7 2 Caution Plate The Model DH 24PD3 unit is provided with a Caution Plate illustrated below which lists basic safety precautions in use Carefully ensure that the customer fully understands and follows these precautions before using tool For the U S A and Canada 7 3 Dust Collecting Equipment 1 Maintenance of dust collection efficiency If the dust bag becomes clogged or excessively filled dus...

Page 16: ... dust fan chamber consisting of casing A and casing B located between the gear cover and housing Dust is drawn in from the nozzle of the dust collection adapter ass y by the suction provided by the dust fan mounted inside the dust fan chamber and is deposited in the dust bag The dust shaft on which the dust fan is mounted is connected to the armature shaft by a spline and rotates at the same speed...

Page 17: ... 14 Rubber cap Side handle Stroke Drilling depth Pipe A Stopper Fig 4 Drill bit Nozzle seal Tail cap Washer Nozzle A B O ring Pipe B Spring Adapter holder Hose Section ...

Page 18: ... Piston Reciprocating bearing Armature Tool shaft Motor shaft Steel ball Piston reciprocating mechanism In conventional rotary hammers a piston is caused to reciprocate by a connecting rod and crank shaft and the crank shaft and the cylinder axis are at right angle to each other Accordingly the armature shaft and the cylinder axis are at a right angle to each other In the Model DH 24PD3 through ad...

Page 19: ...onventional rotary hammers When the drill bit is lifted from the concrete surface on completion of drilling the second hammer moves to the position indicated by the continuous lines in Fig 6 and the protruding lip portion at the tip of the striker is gripped by O ring C mounted between the hammer holder and the damper holder In this state should the piston continue to move so that the small piston...

Page 20: ...sively large torque is applied to the tool shaft cylinder the force of the torque will exceed the pressure of the coil spring and cause the claws on the second gear to disengage from and ride over the claws on the cylinder so that the second gear idles and does not transmit rotation Even should the drill bit come in contact with a reinforcing bar within the concrete causing sudden excessive torque...

Page 21: ...ainst on the reciprocating bearing by the force of the clutch spring during usual operation Rotation Hammering The reciprocating bearing is fitted on the second shaft with some play When the change lever is set to the Rotation Only mark position the eccentric pin of the change lever forces the clutch to move against the pressure of the clutch spring in the direction of the front cap so that it dis...

Page 22: ... out Key slot two pieces Key rail 2 pcs Shape of SDS plus shank bit Ball holder Steel ball Section A A Cylinder Fig 8 The service life of a drill bit with a diameter of 8 mm is approximately 300 holes when drilling into concrete with a depth of 30 mm If reground before the end of its service life the drill bit will continue to provide efficient drilling Figure 9 shows the regrinding angle Regrindi...

Page 23: ...ts When using a drill bit with an overall length of 166 mm with dust collector B drilling up to a depth of approximately 72 mm is possible When using dust collector B ensure it is securely fastened to the grip on the main body with socket adapter B Although the socket and socket adapter B rotate together with the tool shank there is a steel ball between the outer race and the socket which serves a...

Page 24: ...e Drill bit length 166 mm Dust cover Washer Outer race Steel Ball D6 35 Socket Approx 72 mm 2 27 32 Approx 16 mm 5 8 Fig 11 Dust collector B structure Retaining ring for D30 shaft Seal cover Socket adapter B Drill bit length 110 mm ...

Page 25: ... the Gear Cover 10 including the Inner Cover Ass y 40 Next remove the three Tapping Screws W Flange D4 x 20 Black 92 and the Handle Cover 91 take out the Carbon Brushes 1 Pair 83 together with the Brush Holders 84 hold Casing A 69 and remove the Housing 77 The Armature 71 will either remain in the Housing 77 or come off together with Casing A 69 Then after separating Casing B 46 from Casing A 69 s...

Page 26: ... note that the First Gear 62 must be aligned with and press fitted onto the 9 mm diameter end of the Second Shaft 57 The Clutch 60 Clutch Spring 59 and Washer B 58 can then be removed from the Second Shaft 57 2 Disassembly of the dust collection adapter ass y Disassembly of the Hose Ass y 101 only Loosen the knob that fixes the stopper and push pipe A to its maximum stroke position This will cause...

Page 27: ... 7 can be removed from the Cylinder 18 5 Disassembly of the cylinder and the second gear slip mechanism section Remove the Gear Cover 10 from the Inner Cover Ass y 40 and remove the entire tool retainer Remove the Retaining Ring for D20 Shaft 8 with a retaining ring puller Stand the Gear Cover 10 in this state and pull out the Cylinder 18 from the Gear Cover 10 with a hand press Then Sleeve A 15 c...

Page 28: ... surface of stopper ring jig A J 341 with a vise and compress Damper A 32 it moves a little when the Stopper Ring 35 is pressed with punch C J 341 Insert punch C J 341 into the 5 mm diameter hole 2 places in the Cylinder 18 and tap the outside of the Stopper Ring 35 until the Stopper Ring 35 cannot be seen from the 5 mm diameter hole 2 places to remove the Stopper Ring 35 from the groove of the in...

Page 29: ... grease in the gear cover and 5 g in the inner cover groove Apply Molub Alloy No 777 1 grease to the outer circumference of the Clutch 60 groove and the pin portion of the Change Lever 25 Apply Hitachi Motor Grease No 29 to the O ring S 18 24 for the Steel Ball D7 0 17 and the Change Lever 25 Application of Hitachi Motor Grease No 29 makes it easy to mount the Spacer 55 2 When assembling Housing 7...

Page 30: ...at the Stopper Ring 35 is securely fitted in the groove of the inside diameter portion of the Cylinder 18 viewing from the 5 mm diameter hole 2 pcs on the Cylinder 18 5 Mounting the Change Lever 25 Push the Pushing Button 22 deeply in the hole of the Change Lever 25 Position the Change Lever 25 on the Gear Cover 10 as shown in Fig 22 and push it in firmly Adjust the Change Lever 25 to the position...

Page 31: ...l Prior to reassembly apply grease to the inner circumference of the Oil Seal 12 However do not apply grease to its outer circumference Also when press fitting the Oil Seal 12 ensure that it is straight and level 8 Reassembly of the internal pressure adjustment mechanism Push Felt Packing A 51 Valve 52 and Felt Packing B 53 in the Inner Cover Ass y 40 as far as they will go in this order Fig 23 In...

Page 32: ...62 Piston 38 9 Mounting the piston Mount the Piston 38 as shown in Fig 24 9 3 Tightening Torque Tapping Screws D4 73 92 2 0 0 5 N m 20 5 kgf cm 17 4 4 3 in lbs Tapping Screw W Flange D5 x 90 9 2 9 0 5 N m 30 5 kgf cm 26 0 4 3 in lbs Striker 36 Inner Cover Ass y 40 ...

Page 33: ... 30 9 4 Wiring Diagrams 1 Products with noise suppressor Fig 25 2 Products without noise suppressor Fig 26 ...

Page 34: ...Arrangement and Wiring Work A Internal wire arrangement 1 Product with noise suppressor Noise Suppressor 87 Choke Coil A Blue 81 White Stator White or blue Black or brown Blue Choke coil Red Stator White Stator Gray Stator Black Stator Brown Choke coil ...

Page 35: ... 32 Fig 28 2 Product without noise suppressor White Stator White or blue Black or brown Blue CB Red Stator White Stator Gray Stator Black Stator Brown CB ...

Page 36: ...ghtening torque 0 6 0 2 N m 6 2 kgf cm 5 2 1 7 in lbs Insert the lead wire gray coming from the stator into the terminal M1 and the lead wire red into the terminal M2 Insert each lead wire white coming from the noise suppressor into the terminal C1 and C2 After the insertion pull each lead wire slightly to check the lead wires do not come off To disconnect the lead wires insert a small flat blade ...

Page 37: ...ng 6001DπD Ball Bearing 608VV Inner Cover Ass y Spring B Second Shaft Clutch Spring Clutch Reciprocating Bearing First Gear Ball Bearing 626VV General Assembly Housing Stator Second Hammer O ring 1AP 20 Hammer Holder O ring B Damper A O ring C Damper Holder Cylinder Second Gear Spring A Front Cap Grip Ball Holder Holder Spring Steel Ball D7 0 Gear Cover Oil Seal Ball Bearing 6904DD Sleeve A Casing...

Page 38: ... 98 99 100 101 103 104 501 502 503 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 55 64 65 66 67 68 69 70 71 72 73 74 45 75 76 77 78 79 80 81 82 83 84 85 86 84 87 88 89 90 91 92 93 94 ...

Page 39: ...SPRING A 1 21 HITACHI LABEL 1 22 324 530 PUSHING BUTTON 1 23 317 223 PUSHING SPRING 1 24 878 885 O RING S 18 1 25 324 951 CHANGE LEVER 1 26 301 679 WASHER A 1 27 322 813 RETAINING RING 37MM 1 28 324 525 SECOND HAMMER 1 29 944 486 O RING 1AP 20 1 30 324 524 DAMPER HOLDER 1 31 322 802 O RING B 1 32 322 805 DAMPER A 1 33 322 808 O RING C 1 34 324 523 HAMMER HOLDER 1 35 322 807 STOPPER RING 1 36 324 5...

Page 40: ...LL BEARING 608VVC2PS2L 1 76 325 154 HITACHI PLATE 1 77 324 553 HOUSING 1 78 324 549 CHOKE COIL A BROWN 1 EXCEPT FOR USA CAN 79 324 536 SWITCH 1P PILLAR TYPE 1 80 322 853 PUSHING BUTTON 1 81 324 551 CHOKE COIL A BLUE 1 EXCEPT FOR USA CAN 82 324 538 INTERNAL WIRE A BLUE 1 FOR USA CAN 83 999 041 CARBON BRUSH 1 PAIR 1 84 955 203 BRUSH HOLDER 2 85 324 537 INTERNAL WIRE A BROWN 1 FOR USA CAN 86 999 072 ...

Page 41: ...ATIVE PARTS 4 ITEM NO CODE NO DESCRIPTION REMARKS NO USED PARTS 9 05 DH 24PD3 101 302 076 HOSE ASS Y 1 INCLUD 102 102 873 095 O RING P 16 1 103 302 386 RAIL 1 104 302 048 DUST BAG ASS Y DEEP BLUE 1 INCLUD 103 ...

Page 42: ...DRILL CHUCK 13VLRB D 1 INCLUD 617 617 995 344 FLAT HD SCREW A LEFT HAND M6X25 1 618 321 813 DRILL CHUCK 13VLD D 1 619 971 511Z DRIVER BIT A NO 2 25L 1 620 971 512Z DRIVER BIT A NO 3 25L 1 621 944 477 COTTER 1 622 982 684 CENTER PIN A 109L FOR CORE BIT D32 38 1 623 982 685 CENTER PIN B 104L FOR CORE BIT D45 90 1 624 982 672 CORE BIT A 25MM 1 625 982 673 CORE BIT A 29MM 1 626 982 674 CORE BIT A 32MM...

Page 43: ...HOR ADAPTER SDS 12 7MMX90L 1 656 303 045 CHEMICAL ANCHOR ADAPTER SDS 19 0MMX100L 1 657 303 334 CHUCK HANDLE 1 658 302 976 ANCHOR SETTING ADAPTER A SDS W1 4X260L 1 659 930 515 CHUCK WRENCH 10G 1 660 302 975 ANCHOR SETTING ADAPTER A SDS W5 16X260L 1 661 303 621 ANCHOR SETTING ADAPTER A SDS W3 8X160L 1 662 302 974 ANCHOR SETTING ADAPTER A SDS W3 8X260L 1 663 302 979 ANCHOR SETTING ADAPTER B SDS W1 4X...

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