Hitachi DH 24PD2 Technical Data And Service Manual
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Hitachi DH 24PD2 Technical Data And Service Manual

Hitachi DH 24PD2 Technical Data And Service Manual

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MODEL
DH 24PD2
Hitachi
Power Tools
D
TECHNICAL DATA
ROTARY HAMMER
AND
DH 24PD2
SERVICE MANUAL
LIST No. E480
May 2004
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi DH 24PD2

  • Page 1 MODEL DH 24PD2 Hitachi Power Tools TECHNICAL DATA ROTARY HAMMER DH 24PD2 SERVICE MANUAL LIST No. E480 May 2004 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2 REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, symbols are used in the place of company names and model names of our competitors. The symbols utilized here are as follows: Competitors Symbols Utilized Company Name Model Name GAH500DSR BOSCH HR2430 MAKITA...
  • Page 3 9-3. Tightening Torque ........................29 9-4. Wiring Diagrams .......................... 30 9-5. Internal Wire Arrangement and Wiring Work ................31 9-6. Insulation Tests ..........................33 9-7. No-load Current Values........................ 33 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............34 Assembly Diagram for DH 24PD2...

  • Page 4: Product Name

    2. MARKETING OBJECTIVE The Model DH 24PD2 is an upgraded version of the current Model DH 24PD, which features the concrete drilling capacity with the maximum drill bit diameter 24 mm and the use of SDS-plus shank tools. The performance and the durability are greatly improved.

  • Page 5: Selling Points

    4. SELLING POINTS Class-top dust collection efficiency Improved resistance to grease leakage New and powerful design One-push tool retainer Non-slip double-layer molded handle Compact body Push-button type forward- reverse changeover switch --- 2 ---...

  • Page 6: Selling Point Descriptions

    4-1-2. Improved resistance to grease leakage The Model DH 24PD2 is equipped with a sealed type ball bearing at the tip of the bearing unit while the current Model DH 24PD is equipped with an open type ball bearing. In addition, the clearance around the bearing is minimized to improve the resistance to grease leakage.

  • Page 7: Specifications

    5. SPECIFICATIONS 5-1. Specifications Model DH 24PD2 Capacity Concrete 3.4 --- 24 mm (1/8" --- 15/16") Steel 13 mm (1/2") Wood 32 mm (1-1/4") Power source AC single phase 50 Hz or 60 Hz Voltage (V) Voltage, current and input...

  • Page 8: Optional Accessories

    5-2. Optional Accessories A. Drilling anchor holes (rotation + hammering) Drill bit (slender shaft) (2) Adapter for slender shaft (1) Drill bit (slender shaft) (SDS-plus shank) Drill bit (slender shaft) Adapter for slender shaft Outer dia. (mm) Overall length (mm) Code No.
  • Page 9 13 mm hammer drill chuck For drilling operations when using a straight shank bit for impact drilling with a rotary hammer 13 mm (1/2") hammer drill Straight-shank bit for chuck (SDS-plus shank) impact drills Chuck wrench Part name Code No. 13 mm (1/2") hammer drill chuck 303332 (including chuck wrench)
  • Page 10 Anchor setting bar for manual anchor setting Anchor setting adapter Part name Code No. Part name Code No. W-1/4 Anchor setting adapter-A 971794 W-1/4 Anchor setting adapter-B 971799 W-5/16 Anchor setting adapter-A 971795 W-5/16 Anchor setting adapter-B 971800 W-3/8 Anchor setting adapter-A 971796 W-3/8 Anchor setting adapter-B 971801...
  • Page 11 E. Drilling and driving screw (rotation only) Drill chuck, chuck adapter (G), special screw and chuck wrench 13 mm (1/2") Drill chuck Chuck adapter (G) Special screw (13VLRB-D type) (SDS-plus shank) Chuck wrench (Note) If the tool is to be used for loosening screws, open the three jaws of the drill chuck and 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).
  • Page 12 F. Drilling hole (rotation only) For drilling holes in steel and wood • • • Chuck adapter (D) Drill chuck (13VLD-D) (SDS-plus shank) (NOTE) The 13VLD-D drill chuck and chuck adapter (D) cannot be used for reverse rotation. If reverse rotation is to be used for loosening screws, use the plus bit (bit No.
  • Page 13 I. Dust cup, dust collector (B) Dust cup Dust collector (B) ass'y Code No. 971787 Code No. 306885 J. Paper dust bag Code No. 302741 --- 10 ---...

  • Page 14: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons Maker Model • HITACHI HITACHI DH 24PD2 DH 24PD Item 24 (15/16") 24 (15/16") 24 (15/16") 24 (15/16") Concrete 13 (1/2") 13 (1/2") 13 (1/2") 13 (1/2") Capacity Steel Wood 32 (1-1/4") 32 (1-1/4")

  • Page 15: Dust Collection Efficiency Comparison

    Fig. 1 for comparison purpose only. Figure 1 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. HITACHI DH 24PD2 HITACHI DH 24PD Dust collection efficiency (%) Fig.

  • Page 16: Drilling Speed Comparison

    6-3. Drilling Speed Comparison Drilling speed varies considerably depending on the work conditions. Use the factory test results shown in Fig. 2 for comparison purpose only. HITACHI DH 24PD2 HITACHI DH 24PD Drill bit dia. (mm) Fig. 2 [Test conditions]...

  • Page 17: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model DH 24PD2 Rotary Hammer by all of our customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions, and fully understands the meaning of the precautions listed on the Caution Plate attached to each tool.

  • Page 18: Reference Material

    8-2. Dust Collection Mechanism As illustrated in Fig. 3, the Model DH 24PD2 is provided with a 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.
  • Page 19 Nozzle seal Rubber cap Drill bit Side handle Washer Section Nozzle (A) (B) Pipe (A) Stroke (Drilling depth) Tail cap Spring Adapter holder O-ring Pipe (B) Stopper Hose Fig. 4 --- 16 ---...

  • Page 20: Tool Structure

    Model DH 24PD2 more compact for easier handling and operability. Thus, the appearance of the Model DH 24PD2 is similar to that of an impact drill. The rotation of the armature is transmitted to the second shaft via the first gear, and causes it to rotate. The second pinion assembled on the second shaft via the first gear, engages the second gear mounted on the outer circumference of the cylinder.
  • Page 21 O-ring be replaced approximately once a year, depending on the frequency of usage of the tool. Idle hammering prevention mechanism The idle hammering prevention mechanism in the Model DH 24PD2 is different from that of conventional 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.
  • Page 22 Slip mechanism The slip mechanism in the Model DH 24PD2 consists of a coil spring which applies a pre-set amount of pressure to ensure the interlocking of three claws provided on the flange of the cylinder (the final rotating shaft) and three matching claws provided on the face of the second gear, by which rotation is transmitted to the cylinder.

  • Page 23: Rotation Only" And "Rotation + Hammering" Changeover Mechanism

    8-4. "Rotation Only" and "Rotation + Hammering" Changeover Mechanism The change lever on the Model DH 24PD2 permits quick and easy changeover between the "Rotation Only" and "Rotation + Hammering" functions. When operating the change lever, be sure to continue pressing the pushing button.

  • Page 24: Drill Bits

    8-6. Drill Bits The chuck section is designed exclusively for the popular and widely available SDS-plus shank bits, as shown in Fig. 7. Rotating torque is transmitted to the drill bit by two key rails provided in the tool holding section. A steel ball is used to prevent the bit from falling out.

  • Page 25: Chuck Section

    8-8. Dust Collector (B) When drilling holes overhead, dust collector (B) can be mounted on the Model DH 24PD2 to prevent dust and chips from falling downward. Dust collector (B) is intended solely for use when drilling holes in concrete, and cannot be used for drilling holes in steel or wood.
  • Page 26 Fig. 10 Dust collector (B) structure --- 23 ---...

  • Page 27: Precautions In Disassembly And Reassembly

    9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram. 9-1. Disassembly (1) Disassembly of the dust collection mechanism: Refer to Fig. 11 and Fig. 12. Remove the four Tapping Screws (W/Flange) D5 x 90 [9] which fix the Gear Cover [10], insert the tip of a flat- blade screwdriver into the notch provided between Causing (B) [57] and the Gear Cover [10] (including the Inner Cover [39]), and turn the screwdriver gently to open a gap between them.
  • Page 28 (2) Disassembly of the dust collection adapter ass'y Disassembly of the Hose Ass'y [98] only Loosen the knob that fixes the stopper, and push pipe (A) to its maximum stroke position. This will cause the Hose Ass'y [98] connection portion of pipe (A) to come out of the rear end of pipe (B). In that state, pull on the Hose Ass'y [98] to separate it from pipe (A).
  • Page 29 Change Lever [14] Pushing Button [12] Fig. 14 (4) Disassembly of the tool retainer Slide the Grip [3] fully in the arrow direction as shown in Fig. 15 and remove the Front Cap [1]. Pulling the Grip [3] as shown in Fig. 16, remove the Stopper Ring [2] with a retaining ring puller. Then the Grip [3], Ball Holder [4], Steel Ball D7.0 [21], Holder Plate [5], Holder Spring [6] and Washer (B) [7] can be removed from the Cylinder [22].
  • Page 30 (6) Removal of the cylinder and the second hammer Remove the Stopper Ring [34] from the inside diameter portion of the Cylinder [22]. Then the Second Hammer [27], O-ring (1AP-20) [28], Hammer Holder [29], O-ring (B) [30], Damper (A) [31], O-ring (C) [32] and Damper Holder [33] can be removed from the Cylinder [22].

  • Page 31: Reassembly

    Apply Molub Alloy No. 777-1 grease to the outer circumference of the Clutch [47] groove and the pin portion of the Change Lever [14]. Apply Hitachi Motor Grease No. 29 to the O-ring (S-18) [15] for the Steel Ball D7.0 [21] and the Change Lever [14].

  • Page 32: Tightening Torque

    (5) Mounting the change lever Press the Pushing Button [12] deeply into the hole of the Change Lever [14]. Adjust the Change Lever [14] to the position shown in Fig. 20 of the Gear Cover [10] and press it hard. Then set the Change Lever [14] to the "rotation + hammering"...

  • Page 33: Wiring Diagrams

    9-4. Wiring Diagrams (1) Products with noise suppressor Forward-reverse changeover switch Variable speed switch Stator Blue Gray White Noise Choke coil suppressor Cord Choke coil Brown Black Stator Fig. 22 (2) Products without noise suppressor Forward-reverse changeover switch Variable speed switch Stator Blue Gray...

  • Page 34: Internal Wire Arrangement And Wiring Work

    9-5. Internal Wire Arrangement and Wiring Work A. Internal wire arrangement (1) Product with noise suppressor Brown (Choke coil) Choke Coil Gray (Stator) (Brown) [80] Black (Stator) Choke Coil (Blue) [81] Blue (Choke coil) White (Stator) Red (Stator) Noise Suppressor [84] Fig.
  • Page 35 (2) Product without noise suppressor Brown (CB) Gray (Stator) Support (B) [82] Support (B) [82] Black (Stator) Blue (CB) White (Stator) Red (Stator) Fig. 25 --- 32 ---...

  • Page 36: Insulation Tests

    B. Additional wiring work General internal wiring can be accomplished by referring to (Stator) (CB or choke coil) paragraphs 9-4 and 9-5-A. The following are special instructions for switch connection. (1) Wiring of reversing switch Insert the lead wire (black) coming from the stator into the terminal (1) of the reversing switch, and the lead wire (white) into the terminal (2) as shown in Fig.

  • Page 37: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed DH 24PD2 Work Flow Handle Cover Switch Cord Armor Cord Housing Stator Armature Casing (B) Casing (A) O-ring (P-22) Ball Bearing (6001DD) Ball Bearing (608DD) Ball Bearing (608VV) Seal Plate...
  • Page 38 Hitachi Power Tools LIST NO. E480 ELECTRIC TOOL PARTS LIST ROTARY HAMMER 2004 • • Model DH 24PD2 (E1)
  • Page 39 PARTS DH 24PD2 ITEM CODE NO. DESCRIPTION REMARKS USED 306-345 FRONT CAP 306-340 STOPPER RING 322-809 GRIP 322-810 BALL HOLDER 322-811 HOLDER PLATE 322-812 HOLDER SPRING 984-118 WASHER (B) 939-547 RETAINING RING FOR D20 SHAFT (10 PCS.) 302-210 TAPPING SCREW (W/FLANGE) D5X90...
  • Page 40 PARTS DH 24PD2 ITEM CODE NO. REMARKS DESCRIPTION USED 322-816 FELT PACKING 876-796 O-RING (P-22) 322-818 PACKING WASHER 608-DDM BALL BEARING 608DDC2PS2L 982-631 WASHER (A) 323-174 CASING (B) 302-113 SEAL PLATE 302-111 DUST FAN 302-371 O-RING 323-176 DUST SHAFT 993-052...
  • Page 41 PARTS DH 24PD2 ITEM CODE NO. DESCRIPTION REMARKS USED 303-159 KNOB BOLT M4X25.5 872-470 O-RING (S-26) 302-076 HOSE ASS’Y 1 INCLUD. 99 873-095 O-RING (P-16) 302-386 RAIL 302-048 DUST BAG ASS’Y 1 INCLUD. 100 --- 4 --- * ALTERNATIVE PARTS...

  • Page 42: Standard Accessories

    STANDARD ACCESSORIES DH 24PD2 ITEM CODE NO. DESCRIPTION REMARKS USED 323-177 CASE 303-659 SIDE HANDLE 302-374 OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 980-927 GREASE FOR HAMMER. HAMMER DRILL (500G) 981-840 GREASE (A) FOR HAMMER. HAMMER DRILL (30G) 308-471 GREASE FOR HAMMER.
  • Page 43 OPTIONAL ACCESSORIES DH 24PD2 ITEM CODE NO. DESCRIPTION REMARKS USED 971-800 ANCHOR SETTING ADAPTER B W5/16” (MANUAL) 971-801 ANCHOR SETTING ADAPTER B W3/8” (MANUAL) 971-802 ANCHOR SETTING ADAPTER B W1/2” (MANUAL) 971-803 ANCHOR SETTING ADAPTER B W5/8” (MANUAL) 944-460 TAPER SHANK DRILL BIT D11X100 944-461 TAPER SHANK DRILL BIT D12.3X110...

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