Hitachi DH 24PE (S) Technical Data And Service Manual
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Hitachi DH 24PE (S) Technical Data And Service Manual

Hitachi DH 24PE (S) Technical Data And Service Manual

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MODEL
DH 24PE (S)
[3-Mode Action]
Hitachi
Power Tools
D
HAMMER DRILL
TECHNICAL DATA
AND
DH 24PE (S)
SERVICE MANUAL
[3-Mode Action]
LIST No. E440
Jan. 2004
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi DH 24PE (S)

  • Page 1 MODEL DH 24PE (S) [3-Mode Action] Hitachi Power Tools HAMMER DRILL TECHNICAL DATA DH 24PE (S) SERVICE MANUAL [3-Mode Action] LIST No. E440 Jan. 2004 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...

  • Page 2: Table Of Contents

    CONTENTS Page 1. PRODUCT NAME ......................... 1 2. MARKETING OBJECTIVE ......................1 3.APPLICATIONS ..........................1 4. SELLING POINTS ........................2 4.1 Selling Point Descriptions ......................3 5. SPECIFICATIONS ........................4 5-1. Specifications ..........................4 5-2. Optional Accessories ........................5 6. PRACTICAL DATA ........................11 6-1.

  • Page 3: Product Name

    1. PRODUCT NAME Hitachi Hammer Drill, Model DH 24PE (S) [3-Mode Action] 2. MARKETING OBJECTIVE This hammer drill provides three function modes, "rotation and striking", "rotation only" and "striking only". The latter is suitable for chiseling and grooving work. The Model DH 24PE (S) is equipped with a variable locking mechanism that allows the angle of a tool such as a flat chisel to be adjusted in 36 positions in the "striking only"...

  • Page 4: Selling Points

    4. SELLING POINTS Maker Model Weight Overall length • Hitachi DH 24PE (S) 2.5 kg (5.5 lbs.) 407 mm (16-1/32") Powerful 620 W motor Push-button type reversing switch Faster drilling speed Variable speed control switch --- 2 ---...

  • Page 5: Selling Point Descriptions

    Maker Model Weight Overall length • Hitachi DH 24PE (S) 2.5 kg (5.5 lbs.) 407 mm (16-1/32") The Model DH 24PE (S) with D-shaped handle has the same striking mechanism as the Model DH 24PC equipped with reciprocating bearing. The overall length is significantly reduced and it is one of the most lightweight hammer drills in this class.

  • Page 6: Specifications

    5. SPECIFICATIONS 5-1. Specifications DH 24PE (S) Model 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 60 Hz Input (W) Current (A) Voltage (V) Voltage, current and input Rotation speed No-load 0 --- 1,350/min.

  • Page 7: Optional Accessories

    5-2. Optional Accessories A. Drilling anchor holes (rotation + striking) 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 Code No. Effective length (mm) Overall length (mm) Code No.
  • Page 8 B. Anchor setting (striking only) Anchor setting bar to permit anchor setting operation with the hammer drill Anchor setting bar Anchor setting adapter (SDS-plus shank) Code No. Code No. Part name Overall length Part name Overall length 302976 W-1/4 Anchor setting adapter-B 302979 W-1/4 Anchor setting adapter-A 302975...
  • Page 9 (2) Guide plate Core bit (outer diameter) (mm) Core bit (outer diameter) (mm) Code No. Code No. 32 (1-1/4") 982686 50 (2") 982690 35 (1-3/8") 982687 982688 38 (1-1/2") 982689 45 (1-25/32") (3) Core bit with guide plate (the guide plate is not supplied with 25 mm (31/32") and 29 mm (1-5/32") outer diameter core bits.) Outer diameter (mm) Outer diameter (mm)
  • Page 10 F. Groove digging and edging (striking only) Cold chisel Cutter (SDS-plus shank) (SDS-plus shank) Code No. 316658 Code No. 316657 G. Grooving (striking only) Grooving chisel (SDS-plus shank) Code No. 316659 H. Drilling holes and driving screws (rotation only) Drill chuck, chuck dapter (G), special screw and chuck wrench Special screw 13 mm (1/2") Drill chuck Chuck adapter (G)
  • Page 11 (1) Cross-recessed head (Phillips) bit (2) Slotted-head (minus) bit [Overall length: 70 mm] [Overall length: 50 mm] (For use with cross-recessed head (phillips) screw) (For use with slotted-head (minus) screw) Stamped bit No. Tip thickness Bit tip Code No. Applicable screw dia. (mm) Bit No.
  • Page 12 K. Grease for electric impact drill Containing 500 g (17.64 oz): Code No. 980927 Containing 30 g (1.06 oz): Code No. 981840 70 g (2.5 oz): Code No. 308471 L. Dust cup, dust collector (B) Dust cup Dust collector (B) ass'y Code No.

  • Page 13: Practical Data

    Drilling speed depends on the operating conditions. The test results shown in Fig. 1 are based on actual tests at the factory and should be used as a reference only. The drill bits which used in the test are the Hitachi genuine SDS-plus shank bits. Pressing force: 10 kgf...

  • Page 14: Precautions In Sales Promotion

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

  • Page 15: Reference Material

    8.REFERENCE MATERIAL 8-1. Lubrication It is not necessary to replenish the grease lubricant unless the tool is disassembled or there is grease leakage due to a defective seal. Special grease is used in the striking section. Should the striking section (within the gear cover) be disassembled, carefully remove the old grease from all parts and, on reassembly, inject 55 g (1.94 oz) of new grease into the gear cover.
  • Page 16 • Piston reciprocating mechanism In conventional hammer drills, a piston is caused to reciprocate by a connecting rod and crankshaft, and the crankshaft and the cylinder axes are at right angles to each other. Accordingly, the armature shaft and the cylinder axes are also at right angles to each other.
  • Page 17 • Striking function The piston reciprocates within the cylinder to move the striker in the same manner as in conventional hammer drills. As the piston reciprocates, the changing air pressure inside the air chamber between the piston and the striker causes the striker to move and repeatedly strike against the end of the second hammer. At the same time, the changing air pressure within the air chamber which moves the striker also provides an "air cushion"...
  • Page 18 • Slip mechanism The slip mechanism in the Model DH 24PE (S) 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 six matching claws provided on the face of the second gear, by which rotation is transmitted to the cylinder.

  • Page 19: Three-Mode" Changeover Mechanism

    8-3. "Three-Mode" Changeover Mechanism The change lever of the Model DH 24PE (S) permits quick and easy changeover among the "rotation and striking", "rotation only" and "striking only" functions. Each function mode is explained below. When operating the change lever, be sure to continue pressing the pushing button. (1) Rotation and striking (Fig.
  • Page 20 (2) Rotation only (Fig. 6) Adjust the change lever to "rotation only" ( mark). The lock plate is moved forward by the pin of the change lever, and the clutch is moved forward at the back end of the lock plate. Engagement between the clutch and the claws of the reciprocating bearing is released ( A portion in the figure).
  • Page 21 (4) Neutral (Fig. 8) The Model DH 24PE (S) has a neutral mode used for positioning a tool such as a flat chisel. Adjust the change lever to a position halfway between "striking only" ( mark) and "rotation and striking" ( marks).

  • Page 22: Drill Bits

    8-4. Drill Bits The chuck section is designed exclusively for the popular and widely available SDS-plus shank bits, as shown in Fig. 9. 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 coming off.

  • Page 23: Chuck Section

    8-5. Chuck Section Figure 11 shows the construction of the chuck section. Washer (B) Steel ball Holder Grip spring Front cap Forward Backward Cylinder Key rails (two pieces) Ball holder Fig. 11 The opening where the drill bit is inserted is covered with a front cap (rubber) to prevent dust from entering inside. When the drill bit is inserted, the steel ball fits in to the matching groove on the drill bit to lock it in place and prevent it from coming off.
  • Page 24 Approx. 72 mm (2-27/32") Approx. 16 mm Grip (5/8") (on the main body side) Drill bit length: 166 mm Drill bit length: 110 mm Socket adapter (B) Socket Seal cover Dust cover Retaining ring for D30 shaft Outer race Washer D6.35 steel ball Fig.

  • Page 25: 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 striking mechanism section Push the Second Hammer [116] in the main body with a drill bit or screwdriver to release the striker from O-Ring (B) [26].
  • Page 26 (2) Disassembly of the change lever As shown in Fig. 15, pressing the Pushing Button [110] hard, turn the Change Lever [107] 45˚ counterclockwise from the "striking only" position ( mark). Pry out the Change Lever [107] at this position. Change Lever [107] Pushing Button [110] Fig.
  • Page 27 Extract the Retaining Ring for D37 Hole [17], turn the Gear Cover [104] so that its tip portion is upward, and extract the Ball Bearing 6904CM [16] from the gear cover with a hand press. Pinch the bend of the Retaining Ring [103] with a pair of long-nose pliers in the arrow direction as shown in Fig.
  • Page 28 Use of special repair tools Snap ring pliers [J-200] (See Fig. 19.) Used to remove the Retaining Ring for D20 Shaft [6] which fixes Cylinder [111] at the tip end of the Gear Cover [104]. Spring hook [J-201] (See Fig. 20.) Used to extract the O-Ring (I.D.

  • Page 29: Reassembly

    9-2. Reassembly Perform reassembly in the reverse order of disassembly while observing the given precautions and taking care of the following points. (1) To make reassembly easier, coat the Steel Balls [18], [19] with grease. (2) Reassembly of the Change Lever [107] Press the Pushing Button [110] deeply into the hole of the Change Lever [107].

  • Page 30: Lubrication

    (5) Reassembly of the Gear Cover [104] After reassembly as shown in Fig. 25, ensure that the Change Lever [107] is adjusted to the "striking only" position. Engage the claws of the Clutch [122] and the Reciprocating Bearing [123] each other. Align the wing portion of the Lock Plate [119] horizontally and reinstall the Gear Cover [104] so that the wing portion of the lock plate is contained in the rail inside of the gear cover.

  • Page 31: Wiring Diagram

    9-5. Wiring Diagram Fig. 26 9-6. Internal Wire Arrangement and Wiring Work A. Internal wire arrangement Put the lead wires from the stator under the Brush Holder [65] Pushing button Brush Holder [65] Black (from the Stator 110V-115V [50]) Brown (from the Carbon Brush [64]) White (from the Stator 110V-115V [50]) Blue (from the Carbon Brush [64]) Speed conrol switch and...

  • Page 32: Insulation Tests

    B. Additional wiring work General internal wiring can be accomplished by (Stator) (Carbon brush) referring to paragraphs 9-5 and 9-6. 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 33: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow DH 24PE [3-mode action] Speed Control Switch Handle Cover Cord Housing Cord Armor Stator General Assembly Armature Ass'y Inner Cover O-ring (P-22) Ball Bearing (608DD) Washer (A) Ball Bearing (608VV) Gear Cover...
  • Page 34 Hitachi Power Tools LIST NO. E440 ELECTRIC TOOL PARTS LIST HAMMER DRILL 2004 • • Model DH 24PE (E2) 2 MODE ACTION...
  • Page 35 DH 24PE 3 MODE ACTION 101 102 --- 2 --- 1 -- 04...
  • Page 36 PARTS DH 24PE ITEM CODE NO. DESCRIPTION REMARKS USED 306-345 FRONT CAP 306-992 GRIP 1 FOR 2 MODE ACTION 306-343 BALL HOLDER 1 FOR 2 MODE ACTION 306-342 HOLDER SPRING 984-118 WASHER (B) 939-547 RETAINING RING FOR D20 SHAFT (10 PCS.) 314-876 GEAR COVER 1 FOR 2 MODE ACTION...
  • Page 37 INTERNAL WIRE (B) 313-163 PUSHING BUTTON 999-041 CARBON BRUSH (1 PAIR) 999-072 CARBON BRUSH (AUTO STOP TYPE) (1 PAIR) 955-203 BRUSH HOLDER HITACHI LABEL FOR 2 MODE ACTION 981-373 TUBE (D) 984-750 TAPPING SCREW (W/FLANGE) D4X16 937-631 CORD CLIP 938-051 CORD ARMOR D10.1...
  • Page 38 STANDARD ACCESSORIES DH 24PE ITEM CODE NO. DESCRIPTION REMARKS USED 310-905 CASE 303-659 SIDE HANDLE 303-709 DEPTH GAUGE 310-331 DEPTH GAUGE FOR USA OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 306-369 DRILL BIT (SLENDER SHAFT) D3.4X90 306-368 DRILL BIT (SLENDER SHAFT) D3.5X90 306-370 ADAPTER FOR SLENDER SHAFT (SDS PLUS) 944-460...
  • Page 39 OPTIONAL ACCESSORIES DH 24PE ITEM CODE NO. DESCRIPTION REMARKS USED 982-690 GUIDE PLATE (FOR CORE BIT 50MM) 303-625 CORE BIT SHANK (SDS PLUS) 25-38MM 105L 303-626 CORE BIT SHANK (SDS PLUS) 25-38MM 300L 303-627 CORE BIT SHANK (SDS PLUS) 45-90MM 300L 302-976 ANCHOR SETTING ADAPTER A (SDS+)W1/4X260L 302-975...

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